View Full Version : 02 S54 M Roadster vs 03 SVT Cobra


mattjw916
05-07-2004, 07:49 PM
So earlier this week my co-worker (teh Cobra) asks me if I will bring the M up to work on Friday so he can check it out, so I happily oblige.:cool: We decide to take the cars up to the San Augustine Pass on the way to White Sands Missile Range from NASA so he can take a few glamour shots. From there we decide to do a run on the very tight and technical two-laner :devillook to the Aguirre Springs campsite on the other side of the mountain.

I follow behind since I had heard about, but had never driven the road before. We take off in second gear with him putting a few feet on me (DSC on for safety) into the tight, mostly second gear, turns. The tires quickly scrub off the dirt and I start settling into a nice heel-toe rhythm and quickly I am all over him in every turn. Keeping the S54 on the boil is no problem compared to my S2000 and the stock M brakes are holding up with no problems. Passing in the corners (if it was safe to do so) would have been NO problem under braking and the S54 engine would have had enough grunt to hold him off since the straightaways were extremely brief. The phrase, "I had him in the twisties" was never more accurate, as I had to hold off to about a 7/10ths pace. :alright

We head back down into the city and on the highway we decide to try a 40mph roll-on... :help For you stats junkies it was 90° outside, low humidity, about 5000 feet, with a slight downhill grade. Both cars are stock (except for my bimmerfest.com stickers which add 10hp :D ), drivers about the same weight, I had a ¼ tank of gas and trunk full of crap. Second gear, DSC off, three honks and it is ON... he puts about a fender on me in second gear as the S54 winds to 7600 rpm, I throw it into third and he is pulling ever so slowly away as we rocket nearly side-by-side to ~90mph with traffic fading fast behind us. We shut it down with my front bumper right at his rear. :buttrock

S/C'd Cobras are no joke, big bang for the buck... and it is sick how cheap the mods are compared to the bimmer. He almost passed out when I told him how much the Eisenmann exhaust that I want cost. :eyecrazy:

Pics of course!

http://www.zianet.com/mattjw916/images/cobra-and-m-1.jpg

http://www.zianet.com/mattjw916/images/cobra-and-m-2.jpg

http://www.zianet.com/mattjw916/images/cobra-and-m-4.jpg

Hugo
05-07-2004, 08:37 PM
Good runs! The Z looks so much better than the 'Stang.

Jeff Wong
05-07-2004, 09:52 PM
.

M Roady
05-08-2004, 12:46 AM
Nice runs. Good write up!

The E36/7s and E36/8s are certainly representing lately! Nice to see an S54 getting in on the fun.

c steve
05-08-2004, 02:15 AM
Stock for stock that cobra will also outlap you at the local roadcourse.

A stock M coupe might be a bit quicker; but even they display many of the same piggish inclinations that the cobra does ...

mattjw916
05-08-2004, 12:05 PM
Stock for stock that cobra will also outlap you at the local roadcourse.

A stock M coupe might be a bit quicker; but even they display many of the same piggish inclinations that the cobra does ...
Yeah, anything with straightaways will give the Cobra an advantage. After our little jaunt in the twisties he said that he was locking up the brakes on the corner entries and that it was getting a little squirrly. I wasn't even close to that as I braked deeply into the apexes defeating any advantage he had on the short straights. I am pretty certain I have a bit more experience in the tight twisty stuff than him, since he drag races almost exclusively.

The Cobra is a great car, but even he said that is felt a little hefty on the tight, super narrow, any mistakes and you are in an arroyo, two-laner. I really didn't get that feeling from the M but I think my S2000 felt a bit more balanced.

Anyway, cheers!

Armo95
05-08-2004, 12:20 PM
Nice runs man!

If I can find an S54 M Coupe I would sell my car and my blower kit in a heartbeat for one...but you can't find ANY these days?!?! :( :(

slickav
05-08-2004, 01:09 PM
You could have had him in the twisties

:D

mattjw916
05-08-2004, 02:39 PM
Nice runs man!

If I can find an S54 M Coupe I would sell my car and my blower kit in a heartbeat for one...but you can't find ANY these days?!?! :( :(
It took me a while to find an S54 roadster that I wanted too... hang in there and check out roadfly, they pop up occasionally there and on the classifieds here. There was a red one and a steel grey one for sale recently.

SilverStreak
05-10-2004, 03:07 PM
Great write up!

mattjw916
05-11-2004, 01:29 AM
Great write up!

Thanks man!

Rob Nance
05-13-2004, 06:04 AM
I would have really thought he'd just blow your doors off because of the bone stock HP disparity at sea level is quite large even, but at altitude his supercharger would be suffering a lot less than your car. At 5000 feet in a straight line all signs point to severe beatdown, so it's impressive that you were able to hold your own.

c steve was referring not to him beating you on a roadcourse because of his power advantage, but rather that the Cobra is a decent handling car when compared with an S54. The S5x platform, while not bad by any means, is somewhat outdated as far as handling goes, much like the Cobra (hence Silverstreak's amazing dragstrip experiences in his late roadster).

P.S. I want to buy your bike so bad, my girlfriend would kill me. Please tell me that it's sold already so I can put the evil thought out of my head. I told her I've given up street riding.

Icecream ///Man
05-13-2004, 11:20 AM
Rob, I'm not sure you realize S54=new M3 engine=315hp.

The roadster is a LOT (like almost 1000lbs) lighter than the Cobra.

Good writeup, fun cars.

WebDev
05-13-2004, 11:24 AM
Sounds like fun and I agree that the Roadster has it all over the Stang in terms of looks.

kmurph
05-13-2004, 11:58 AM
in stock form...from everything I've seen and heard, the Cobras aren't as fast as you would think...they weigh several hundred lbs. more than an e46 M3. I was on the track (Nelson Ledges Roadcourse) with one last weekend as a passenger...It did not pull on us at all down the back straight...and that was up to 120-130 mph....we were eventually waved by. When I was driving, I, unfortunately, did not encounter the 2003 but did run with an older one....I was definitely faster...in the turns and in the straights:)

Rob Nance
05-13-2004, 12:21 PM
Rob, I'm not sure you realize S54=new M3 engine=315hp.

The roadster is a LOT (like almost 1000lbs) lighter than the Cobra.

Good writeup, fun cars.

Yes, I am quite aware that the S54 has the E46 M3 engine. Cobras, bone stock, have put down numbers right up at 390 rwhp.

S54 Z3 Roadster, 3142 lbs
2003 SVT Cobra, 3664 lbs

500 lb difference. I took those numbers from the same website, supercars.net


in stock form...from everything I've seen and heard, the Cobras aren't as fast as you would think...they weigh several hundred lbs. more than an e46 M3. I was on the track (Nelson Ledges Roadcourse) with one last weekend as a passenger...It did not pull on us at all down the back straight...and that was up to 120-130 mph....we were eventually waved by. When I was driving, I, unfortunately, did not encounter the 2003 but did run with an older one....I was definitely faster...in the turns and in the turns and in the straights

Are you saying you did or did not run up against a 2003? The difference between anything pre 2003 and a 2003 is not even a comparrison. We are talking around 100 more RWHP with no mods. With 2 hours worth of do it yourself cheap mods you can be pushing 450+ rwhp. The 2003 SVTs are just plain crazy when it comes to raw horsepower.

Anyhow, I am not debating any claims, or calling BS by any means. I was just saying that at altitude with force induction, he wouldn't be losing as much power (although turbos do even better at altitude), so it was an impressive showing for the S54 Roadster.

Icecream ///Man
05-13-2004, 12:35 PM
Ok. 15% lighter = 15% greater acceleration for given power. 390WHP bone stock is certainly a lot of power. Magazines say 390 at the flywheel which means they would have to be 70hp underrated but who knows. I know a guy with a pulley upgrade making that much. There's a strange habit in the F-Body/Pony crew to deny modifications. Either way they're fast cars, easily the peer of the M-badge in a straight line and boltons vs boltons they're faster.

SilverStreak
05-13-2004, 12:43 PM
I've seen bone stock dyno's for 03-04 Cobras from 360-385 rwhp....

kmurph
05-13-2004, 01:00 PM
Are you saying you did or did not run up against a 2003? The difference between anything pre 2003 and a 2003 is not even a comparrison. We are talking around 100 more RWHP with no mods. With 2 hours worth of do it yourself cheap mods you can be pushing 450+ rwhp. The 2003 SVTs are just plain crazy when it comes to raw horsepower.


I'm saying that I was a passenger in an e46 M3 that was with a stock 2003 Cobra on the track...and the 2003 was not pulling on us in the straights...and it was much slower in the turns - which you can't really truthfully compare because driver skill is most important there.

When I was on the track, I did not see the 2003 but did run with an older one...and, yes, I'm aware that the older Cobras are nothing in comparison to the SuperCharged 390HP 2003 Cobra.

mattjw916
05-13-2004, 07:01 PM
My Ducati is still for sale, but I am not trying hard to get rid of it... I really love it, I just don't use it very often.

I am glad to see my post sparked another "civil" discussion, absent of any flameage... BTW the 3100lb weight quoted for the M is with full tank of gas and driver, I don't know if Ford determines its weights in the same manner as BMW.

I just ordered a K&N filter and a Conforti Shark Injector for my M and my friend an I are planning a trip to the local drags for some more fun when I get back in town so I will have some more stories soon.

Eisenmann Ti Meisterschaft 4x73mm exhaust is following shortly (as soon as my credit card wins out over my will-power) as well as TMS pulleys, and some other goodies... :devillook

http://www.zianet.com/mattjw916/images/Z3Mti_1.jpg

RayfuM5
05-13-2004, 08:32 PM
Nice run and nice exhaust. How much for those bad boys?

mattjw916
05-13-2004, 09:12 PM
about $2500... :eek:

e21pilot
05-13-2004, 10:14 PM
We just had an e36 M3 supercharged with a full tank of gas on the scales. It came in at 3260. I'm pretty sure your roadster is lighter than that.

Rob Nance
05-14-2004, 02:33 AM
My Ducati is still for sale, but I am not trying hard to get rid of it... I really love it, I just don't use it very often.

I am glad to see my post sparked another "civil" discussion, absent of any flameage... BTW the 3100lb weight quoted for the M is with full tank of gas and driver, I don't know if Ford determines its weights in the same manner as BMW.

I just ordered a K&N filter and a Conforti Shark Injector for my M and my friend an I are planning a trip to the local drags for some more fun when I get back in town so I will have some more stories soon.

Eisenmann Ti Meisterschaft 4x73mm exhaust is following shortly (as soon as my credit card wins out over my will-power) as well as TMS pulleys, and some other goodies... :devillook

http://www.zianet.com/mattjw916/images/Z3Mti_1.jpg
Very good point, I guess they use the manufacturer specs on that site, and BMW posts with full gas and driver, right?

And for the above, yeah, American car companies underrate like crazy when it comes to muscle cars, no idea why anyone would want to do that except maybe Japanese makers with the whole "gentleman's agreement" thing.

And lastly, while the HP claims of close to 390 at the rear wheels from the factory have been verified, domestic muscle car owners LOVE to leave out things and claim bone stock, lol. I have never understood why they do that. I've seen people claim bone stock drag strip runs, then once you dig deeper you find they had a different pulley for more boost and drag radials, hahaha. People crack me up.

Anyhow, gorgeous exhaust, great car. My love for "The Shoe" has been voiced here a lot, I often debate getting rid of the Z for a shoe.

SilverStreak
05-14-2004, 07:44 AM
I hear you, Rob. I have been to some dyno's with guys getting baseline #'s on 03-04 Cobras, and coming in around 360-385 rwhp. And then they do the pulley swap, chip, headers and exhaust, and put it back up for more like 470-480 rwhp...

One of the more outrageous things I saw was this one guy's Lightning, he had like $2500 into it, and at the dyno it was like 550 rwhp and over 600 rwtq... :eek:

tEckniks
05-14-2004, 08:10 AM
Eisenmann Ti Meisterschaft 4x73mm exhaust is following shortly


great write up!!

:eek: POST VIDEO ASAP When you put that on!!!!!

your pretty tall, do you fit nicely into the Mroadster?

Schneller Bayer
05-14-2004, 02:07 PM
Light weight, and overachieving s54 in the m would make it dead even in a drag race with a cobra. 0-60 in 4.5. You guy's are underestimating the power of the tiny M. And because of that, and it's handling superiority, it would take the SVT on the track any day. But given mods per dollar, watch out for the SVT on the straights. Adding cams is like doubling bhp (more or less, you guys know what I mean). Stock vs. Stock, drag or track, it easily goes in favour of the s54.

boostedhypeR..
05-15-2004, 08:37 AM
anyone who thinks that the 03 cobras are anything less than pure sex is crazy....


he he.....i saw a bright red one a couple days ago and just had to blow off on him. needless to say, he looked scared. not sure why.....its only a turbo integra...


;)


(ok, fine....its a turbo type R. :D )

mattjw916
05-15-2004, 07:38 PM
great write up!!

:eek: POST VIDEO ASAP When you put that on!!!!!

your pretty tall, do you fit nicely into the Mroadster?
Yes, I fit no problem... I typically keep the seat at it lowest and farthest back setting though. I am only 6ft.

mattjw916
05-15-2004, 07:54 PM
Light weight, and overachieving s54 in the m would make it dead even in a drag race with a cobra. 0-60 in 4.5. You guy's are underestimating the power of the tiny M. And because of that, and it's handling superiority, it would take the SVT on the track any day. But given mods per dollar, watch out for the SVT on the straights. Adding cams is like doubling bhp (more or less, you guys know what I mean). Stock vs. Stock, drag or track, it easily goes in favour of the s54.
uh oh, don't let c steve hear you say that :D

At the drags, stock vs stock, whomever launches best is going to win, IMO... the Cobra is going to have more room for error vs the M due to the power advantage and will generally win.

On a track, it will depend on the layout... "Streets of Willow" I would give the nod to the M... something like Laguna Seca, I think the Cobra would take it...

There are way too many variables to take into account in theorectical races so I prefer to only comment on stuff I have personally seen or took part in.

Serious
05-16-2004, 03:05 AM
nice run and write up.

M Roady
05-16-2004, 10:53 AM
A stock E36/7 S54 can run a 12.56@109.1. That isn't your average stick slapper in the driver's seat though.

c steve
05-16-2004, 12:15 PM
Light weight, and overachieving s54 in the m would make it dead even in a drag race with a cobra. 0-60 in 4.5. You guy's are underestimating the power of the tiny M. And because of that, and it's handling superiority, it would take the SVT on the track any day.

The only thing the M has going for it on a track is slightly better brakes. Both cars have compromised spring rates, shock valving and suspension geometry. There are a couple of guys in Denver who run some very quick laps in nearly stock 03 Cobras.

I went from a 98 Cobra to a 99 S52 M coupe back in 99. The M did handle better, but the difference was not night and day. My SCR lap times remained largely unchanged until I started modding the S52 (and switched to race rubber).

As to the 0-60 and 1/4 business. 9 times out of 10 the Cobra is going to walk or run away.

Blaizon
05-17-2004, 03:38 PM
Light weight, and overachieving s54 in the m would make it dead even in a drag race with a cobra. 0-60 in 4.5. You guy's are underestimating the power of the tiny M. And because of that, and it's handling superiority, it would take the SVT on the track any day. But given mods per dollar, watch out for the SVT on the straights. Adding cams is like doubling bhp (more or less, you guys know what I mean). Stock vs. Stock, drag or track, it easily goes in favour of the s54.

Nobody adds cams to other wise stock 03's, that's one of the last things you'll do. Usually mods are CAI, exhaust, pulley and tune. That will get you around 500rwhp. If you want double your hp the best bang for the buck would be a Kenne Bell and supporting fuel system mods 600+ rwhp easy.

The s54 is a sweet car though, I wouldn't mind owing a blown version :redspot

mattjw916
05-17-2004, 04:20 PM
Why would you want a blown S54? There are too many reliablility concerns with that motor, plus it comes stock with 11.5:1 compression, timing would have to significantly retarded or switched to 100+ octane fuel to compensate for the boost.

With a few bolt-ons you can get over 300hp at the wheels, throw on some 3.73 gears, a couple of weight reduction mods, and you have a sub-3000lb monster.

Just my $0.02. :D

M Roady
05-17-2004, 04:29 PM
He is right. The S52 variant takes much more kindly to modifications of the FI type. I'm saving my pennies!

Blaizon
05-18-2004, 08:47 AM
Why would you want a blown S54? There are too many reliablility concerns with that motor, plus it comes stock with 11.5:1 compression, timing would have to significantly retarded or switched to 100+ octane fuel to compensate for the boost.

With a few bolt-ons you can get over 300hp at the wheels, throw on some 3.73 gears, a couple of weight reduction mods, and you have a sub-3000lb monster.

Just my $0.02. :D

Please excuse my ignorance, I know nothing about the engines as far a cr or what not. I thought it was around 9:85:1. Hmm 300rwhp @ sub-3000lbs -vs- 322rwhp at 3350lbs *my car* that would be fun!

Blaizon
05-18-2004, 08:56 AM
He is right. The S52 variant takes much more kindly to modifications of the FI type. I'm saving my pennies!


I'm a little lost here, what is the difference is the S52 the 240hp version?

mattjw916
05-18-2004, 10:35 AM
More than you ever wanted to know about the S52 vs S54 motors is here:

http://www.bmwmregistry.com/model_faq.php?id=16

Excellent read, even has the euro-spec S50 info listed.

Cheers :D

Blaizon
05-18-2004, 04:18 PM
Thanks for the info guys.

Schneller Bayer
05-18-2004, 10:44 PM
as for the doubling hp thing, I was notably exaggerating (just slightly). Also, s54 m roadters are into the twelves, and have gone as low as a 12.56. The lowest I've seen from the cobra is a 12.9, and the rest are over 13.2. It may have 390 hp but given it's heft, that number isn't fully represented in drag races. given 0-60 times of the M (4.4-4.7), which are close to the svt (however, no svt I've seen has eclipsed 4.6), and 1/4 mile times which seem to be in favour of th M, I would hardly say that an SVT cobra would WALK on the roadster, and most certainly not 9 out of 10 times. Because it's fairly close, I'd say either could win, but past experience and results have convinced me that the m is actually the favourite.

As for the track, the M has the obvious advantage of being nearly 600 lbs lighter. If power-to-weight, doesn't get you, then energy and weight transfer certainly will.

clintjg
05-18-2004, 10:56 PM
I went from a 98 Cobra to a 99 S52 M coupe back in 99. The M did handle better, but the difference was not night and day. My SCR lap times remained largely unchanged until I started modding the S52 (and switched to race rubber).
As to the 0-60 and 1/4 business. 9 times out of 10 the Cobra is going to walk or run away.

No offense and I'm not disagreeing with the overall outcome but after driving both, the difference 'tween the S52 powerplant and the S54 is 'significant' to put it mildly. Equal drivers and bone stock the gap between Pony and M shrink's considerably. Primairly depends on the course being run.

My buddy with a Jeep Rubicon told me the other day that he'd run me for the quarter mile. I told him I'd run it in reverse. He said 'Whatever you want but I get to pick the track.' :shifty

Blaizon
05-19-2004, 10:28 AM
as for the doubling hp thing, I was notably exaggerating (just slightly). Also, s54 m roadters are into the twelves, and have gone as low as a 12.56. The lowest I've seen from the cobra is a 12.9, and the rest are over 13.2. It may have 390 hp but given it's heft, that number isn't fully represented in drag races. given 0-60 times of the M (4.4-4.7), which are close to the svt (however, no svt I've seen has eclipsed 4.6), and 1/4 mile times which seem to be in favour of th M, I would hardly say that an SVT cobra would WALK on the roadster, and most certainly not 9 out of 10 times. Because it's fairly close, I'd say either could win, but past experience and results have convinced me that the m is actually the favourite.

As for the track, the M has the obvious advantage of being nearly 600 lbs lighter. If power-to-weight, doesn't get you, then energy and weight transfer certainly will.


12.56 is an awesome time :buttrock, that's what I'm aiming for.

With a good driver 03's can do better than 12.9 *the time slip would tell a lot of what's going on*.

Here is a slip of a user on SVT Performance *The Yellow Cobra* with a bone stock 03 *at the time*.

2003 Cobra

Best Stock Time:
R/T .612
60' 1.986
330 5.402
1/8 8.175
MPH 88.90
990 10.472
1/4 12.539
MPH 113.51

At the same time I've seen 03's run mid 13's :confused: so anything can happen.

How do you think a S54 would compare to my ride *dynoed 322rwhp*? I haven't run since I've dropped the new motor in yet so I'll have some slips soon.

mattjw916
05-19-2004, 10:48 AM
My friend w/the 03 Cobra from my original post in this thread has run a 13.3 bone stock... but remember we are above 5000ft here at the track, so it actually is a really good time for a stock Cobra.

c steve
05-19-2004, 11:53 AM
I would hardly say that an SVT cobra would WALK on the roadster, and most certainly not 9 out of 10 times. Because it's fairly close, I'd say either could win, but past experience and results have convinced me that the m is actually the favourite.

For every M roadster or coupe in the 12's there are a dozen 03 cobras. The trap speeds say it all, the only way an M coupe or roadster is going to get into the 12's is with a very good 60'.

SilverStreaks run is an excellent example of what is possible with an S54 M roadster/coupe, but not very likely. The Cobra may weigh a bit more, but it is also putting down another 100 horsepower or so at the rear wheels. From a roll it is going to run away and hide.

Do I have experience with 03 cobras? Yes.

http://204.144.189.148/810horsepower.jpg

Schneller Bayer
05-19-2004, 02:00 PM
I never denied your experience, and I will say that time slip posted by blaizon is incredible! I will also point out that nearly all of the s54 m coupes/roadsters are into the twelves. Not so with all the cobras. As proven, they can do twelves, but not with the consistency that the bimmers do. As for the 'for every m in the twelves there are a dozen cobra's' is an ignorant and absolute statement. I'm not denying their straightline potential, but you're denying the M's, and you happein to be wrong. SilverStreak's runs are amazing and nearly one-of-a-kind, but so is that aforementioned 12.5 by the cobra. Your car makes about 60 rwhp more (approx. 270 vs. approx 330), but again lighter weight. But these figures, though their revelance is certainly there, are not what matters. The time matters, and THAT's where I've seen the s54 win. The cobra is no superhero, and neither is the roadster, but saying that there are 'a dozen SVT's into the 12's for every M roadster' is only true if there are just that many more cobras produced. Otherwise, it is a far cry from reality. The cobra is not superior, and if it does win, it will hardly be by a noticeable amount. That is if the BMW isn't faster.

Schneller Bayer
05-19-2004, 02:03 PM
and yeah, the M does 0-60 in the 4.4-4.7 range. That would be a very good 0-60 time.

c steve
05-19-2004, 02:30 PM
I will also point out that nearly all of the s54 m coupes/roadsters are into the twelves. Not so with all the cobras.

That's a fairly bold statement to make, and one I would say is wrong. There are probably a handful of S54's in the 12's, while the majority of 03 cobras are well into the 12's.

Your car makes about 60 rwhp more (approx. 270 vs. approx 330), but again lighter weight.
Most cobras are putting down 360-380 stock.

The cobra is not superior, and if it does win, it will hardly be by a noticeable amount. That
You need to understand the concept of trap speeds. 5MPH+ is a hell of a big difference. That means that the cobra is at first walking and then running away from the M as speeds increase.

and yeah, the M does 0-60 in the 4.4-4.7 range. That would be a very good 0-60 time.
60', not 0-60. This makes me question your actual track experience and above comments regarding all of the S54 coupes/roadsters being in the 12's ...

I think it's great that you like the M. I do too, I've owned two of them, but most if not all of your statements seem to be based outside of reality and practical experience. The supercharged cobra is a quicker drag car, so what?

clintjg
05-19-2004, 09:39 PM
For every M roadster or coupe in the 12's there are a dozen 03 cobras. The trap speeds say it all, the only way an M coupe or roadster is going to get into the 12's is with a very good 60'.


:devillook

For every M roadster or Coupe there are a dozen '03 Cobras. ;)

SilverStreak
05-24-2004, 10:05 AM
I've seen "most", like 8 out of 10 03-04 Cobras running 12's... several running low 12's, like 12.3-12.4... while getting baseline #'s... of course, this is at Atco, where it's sea level, etc...

mattjw916
05-25-2004, 11:40 AM
*update*

My friend with the Cobra just went to the dyno on Monday morning and in two runs pulled 405 & 410rwhp!!! :eek: With just an air filter mod in his, that is pretty damn good, what a freak motor!

I guess my car did pretty good after all. :D

Now that I am sharked and have some more mods on the way we'll be ready for some drag runs... w/pics and vids hopefully.

SilverStreak
05-25-2004, 11:44 AM
Wait til he messes with the pulley and exhaust... :D

mattjw916
05-25-2004, 11:59 AM
I think I am going to have to put my car on a serious diet to keep up in the ¼-mile. :D

Miguel Sanchez
05-25-2004, 01:08 PM
Why not just put in a reasonable final drive?
Although I understand the stock vs. stock comparison, BMW really screwed the S54 36/7 and 36/8 cars from the factory: 3.15 final drive, soft shocks, no sport mode.

mattjw916
05-25-2004, 01:43 PM
one of these days, when the warranty is up, I will do the rear-LSD swap... the Shark helps out the throttle-response greatly and the shocks aren't too bad, as long as you keep it off the road-courses. :D

Rob Nance
05-25-2004, 02:38 PM
*update*

My friend with the Cobra just went to the dyno on Monday morning and in two runs pulled 405 & 410rwhp!!! :eek: With just an air filter mod in his, that is pretty damn good, what a freak motor!

I guess my car did pretty good after all. :D

Now that I am sharked and have some more mods on the way we'll be ready for some drag runs... w/pics and vids hopefully.


Even though I stated they dyno real high from the factory, I am wondering if that is a corrected for altitude dyno run.

Any FI experts know better than me about this? Turbos I have always heard lose much less horsepower at altitude because they are able to spin easier due to the thinner air, among other things. I hear superchargers don't lose as much as an NA engine, but aren't quite as good as a turbo setup. Anyone know more on this?

I am just speculating that his car is dynoing an uncorrected 338hp roughly, at the rear wheels. It would be odd for it to make such a high number in adverse conditions like that. I am using the below info to figure 410hp times 82.6%, which gives you the 338hp figure. I used 75 degrees, 35degree dewpoint, 30inches of pressure, and 5000 feet for Las Cruces, NM. 338hp at the wheels seems dead on for the ETs your friend ran.

Either way, it's all relative, you are probably putting out 261 at the crank for your car (not sure what S54s are putting down stock so I used 315hp for the crank).

mattjw916
05-25-2004, 04:25 PM
he was having "traction issues" on his run... the dyno model is something I have not heard of before but I AM going to dyno my car on the same exact dyno for comparison sake in the near future... I will probably post the info in the Z3 forum though since it really does not belong in the kills forum. :D

SilverStreak
05-25-2004, 04:55 PM
I don't know, Rob, I saw one 03 Cobra lay down 383 rwhp bone stock... and they are rated at 390 bhp...

Rob Nance
05-25-2004, 06:13 PM
I don't know, Rob, I saw one 03 Cobra lay down 383 rwhp bone stock... and they are rated at 390 bhp...

Yeah, but to lay down one of the highest numbers anyone has seen from a stock Cobra at 5000 feet makes me believe it's corrected. I'm thinking you didn't read my whole post Dave ;)

SilverStreak
05-25-2004, 06:36 PM
:devillook

M Roady
05-25-2004, 06:54 PM
I don't know, Rob, I saw one 03 Cobra lay down 383 rwhp bone stock... and they are rated at 390 bhp...
That is seriously f'd up!

I saw that Cobra I played with way back when I first got my car. I thought about chasing her down, but there is no room to run especially at rush hour so I left blondie alone...this time.

LMB03M3
07-17-2004, 07:13 AM
ill have to agree with some basic bolt-ons you can get those “stangs up to about 450 rwhp, a lotta bang for the buck.... and those SVT lightnings are the same way, with 3 g“s in it it makes a CRAZY amount of power......but they still dont compare to M cars :D

Enthusiast
07-19-2004, 02:27 PM
That's a pretty good write-up on your encounter with the 03 Cobra. Funny thing is that it looks a lot like mine except I have some mods and Nitto DR's.

Anyway, you guys seem to know quite a bit about the 03/04 Cobras :buttrock

I'm assuming the Cobra was stock. Nowadays, it's hard to find a stock 03 Cobra because they are so easy to mod. They get pretty scary pretty easily. I'm at 462 rwhp and 470 rwtq and I'm plenty happy...all for under $1000 in engine mods. Stock cobras are choked up (on purpose) in stock trim so it's real easy to open them up. Throw on a K&N, pulley, chip, and exhaust and it's a whole different car...like night and day.

As for the M Roadster...totally different animal. I've driven an 02 M that belonged to a cousin and it, too,was no joke. IMO, it would easily outhandle a stock 03 but throw on about $2K in proven suspension mods into the Cobra and it's a whole different story. As I said though, the M is a totally different car and is a whole different experience to drive (more fun IMO). Fit and finish on the M is also in a different level but that's no surprise.

Nice runs!

mattjw916
07-19-2004, 04:32 PM
thanks man, your Cobra sounds pretty badazz :buttrock

slcook54
07-19-2004, 05:32 PM
thanks man, your Cobra sounds pretty badazz :buttrock Matt your posts are slowing down, c'mon, you were ahead of me a few weeks ago, but now I'm back up again. Nice write-up. The other day, this guy got along side me in his cobra and it sounded so loud. At idle his car was louder than my at WOT. Anyways I said nice car pretty loud, he didn't even look over.

Enthusiast
07-19-2004, 05:56 PM
Anyways I said nice car pretty loud, he didn't even look over.

What a loser. :nono

slcook54
07-19-2004, 05:59 PM
What a loser. :nono I think he just didn't hear me, but I did say it pretty loud. Cool car, really loud.

mattjw916
07-19-2004, 06:01 PM
Matt your posts are slowing down, c'mon, you were ahead of me a few weeks ago, but now I'm back up again. Nice write-up. The other day, this guy got along side me in his cobra and it sounded so loud. At idle his car was louder than my at WOT. Anyways I said nice car pretty loud, he didn't even look over.
lol, I have been a bit pre-occupied lately ;)

anyway, sometimes people yell at me when I am driving and I have no idea what the hell they said... he probably just didn't hear you... :D