r/t: .810
60': 2.293
330: 6.433
1/8: 9.839 MPH: 72.36
1000: 12.749
1/4: 15.200 MPH: 91.93

Weather: 86 Degrees F, 70% Humidity


This is a 1995 325i with TMS\J.C. Chip and 17x8.5" Contours all around.

Are these times decent? I didn't do any weight reduction stuff, how much time should that shave off and what should I do? Any track tips would help, this was my first time ever there.

Thanks guys,
Brian


P.S. I would scan the slip but its a PITA...besides who would make up a time of 15.2?
:mdrbig


I should be able to hit 14's with the weight reduction, a few small mods, and lots of launching practice. At least I hope so! :boobies

Any help!?

I think that's pretty good for a mostly stock 325 on a hot day. :)

Could work on the reaction time a bit. Try using the same style launch but nudge the car a little further into the stage lights.

Bump.


:wavey:

:wiggle:

R/T times have no effect on your E/T's at all, the clock doesn't start ticking til you cross the line, you can sit there all day if you want....

I would take out your spare tire, jack, and mounting apparatus, back seats, maybe even front passenger seat and run no more than 1/4 tank of gas, right there, that's about 180-200 lbs, which usually translates to 2 tenths- you're in the 14's with those times.

Next thing to work on is getting your 60' times down, for every 1 tenth in the 60' time = ~ .15-.25 in the 1/4 mile times. Shave a tenth in your 60' as is, with no weight loss, and you could be in the 14's. Playing with the tire pressures some will improve your 60' times...

I'll attach some launch tips from an old thread....

Here you go:

Copy/paste from a thread in the Forced Induction Forum here about 1/4 mile times and launching....

"I do think lowering the psi in your rear tires will make a difference. I don't know what size tires you have, but if you have the stock 245/40-17's in the rear, you want more tires on the road, not less when it comes to the 1/4 mile drag strip for launching.

Now the standard mfgr recommended psi for 245/40-17's is 32 psi. Here's the key, you gotta play with it some. If you go too low you could have cupping, and that doesn't help either.

I'm guessing at 245/40-17's for you, but that is my OEM size too for my car and I have run it at the track with those OEM Dunlops before (I usually run my drag radials at the track...). Anyhow, you're safe dropping them to 28 psi, no problem. You might even be able to go as low as 26 psi, maybe 25 psi, depends on the weather and the track surface temps.

Also, for less friction/rolling resistance, take the front tires up to 45-55 psi.

Also, for weight savings, take as much out of your car as you can. The spare tire and mounting apparatus can weigh as much as 30-40 lbs.

Back seat, passenger seat (my passenger seat weighs like 60 lbs), any excess weight. Take the gas tank down to 1/8th a tank of gas, 1 gallon of gas can weigh like 5 lbs, run a 13-16 gallon tank down to 1/8th a tank, another 50-70 lbs, etc...

You can shave 150-200 lbs with that kind of prep work.

Also, try launching higher. You need to find the sweet spot, between bogging and wheelspin, and that will takes lots of practice and change from day to day, track to track, etc...

The more traction you get from the tires, the higher you can launch your car, and you generally want to launch above torque peak so that when the tires grab, the tach drops, and if you can work the clutch right, avoid major wheelspin, you'll launch like a rocket.

With my DR's I launch at 5500 rpm. On my OEM Dunlops more like 4500-4800 rpm at 26 psi.

Gotta get the throttle steady when staging, an even rpm, clutch half in, half out, just about to grab, the tach dipping ever so slightly.

When the green hits, don't slam your foot down on the gas to the floor, quickly and steadily squeeze it to the floor, and gradually but quickly let out the clutch, sense too much throttle, keep it steadily continually going down and adjust the power to the wheels with the clutch, not the gas.

Now, if when you're shifting you're chirping your tires on every shift, you're losing maybe a tenth. In my car if I'm not careful I could get sideways on every shift, but this method can help anyone chirping on shifts too much:

Find the appropriate amount of throttle to stab back down, then squeeze it to the floor. For me, it's about halfway, then just like on the launch, I quickly squeeze the gas pedal down. I stab halfway (versus all the way back to the floor) and quickly squeeze the pedal back down to the floor. Makes for more uneventful shifts and buys me a couple tenths in the 1/4 mile (I have to shift 3 times, I finish in 4th gear).

Your car may work best with a 2/3rd stab then squeeze, or 3/4th throttle then the quick squeeze, all these techniques require practice and could change given the weather or the track. I take notes on all these items and then tape the timeslip next to it on a notebook page and save it for the future track visits.

Also, if you feel like you're destroying your clutch, you're launching properly if you feel like you preserved some of it, you're not launching right... "


I launch at 5500 rpm, pump my fronts up to 55 psi, rear drag radials down to 16-18 psi, plus all the weight shaving and cool downs in between runs...

Whatever it takes to eek out every last tenth in my car...

Originally posted by SilverStreak

Also, if you feel like you're destroying your clutch, you're launching properly if you feel like you preserved some of it, you're not launching right... "


HEhe -- I always get a laugh out of that one. :biglaughb

I've never dragged (other than leaving the starting line in an autocross), but just playing around with that sentence in the car has led to some fun moments.

Thanks! :laugh

You're welcome! :) I'm here thru the weekend.... :D

Thanks Dave :D

I'd just love to get into the 14's cause 14's are a pretty decent time for my car, nothing special or fast, but decent...plus my friends and I have some healthy competition and I need to atleast be near my friend's just purchased TT 300ZX so I can retain my manhood :D . No...I'll probably never get near within a half second of it but oh well :D ...and then another friend of mine is gonna have his LS1 soon...and then I'll be left behind. :(

'Til I buy my '03 M3 that is...

::opens empty wallet and cries::

That's basically what the car ran when Car and Driver tested the car back in the 92-94 time frame.

JL

Yeah, 5.0 Mustangs are running 14's, nothing wrong with that... :D You just need 1 more tenth in your 60' and you'll lay claim to running 14's! :alright