I DYNO'D my car for the first time! :rolleyes

119.51hp / 120.87 ft-lbs at the wheels. YEAH BABY (yes, thats chipped)

ahaha

just had to share. :stickoutt

Is that 119hp per wheel or both put together? :D

Is that 119hp per wheel or both put together? :D
:rofl

ahahahaha

I'd love to tell you it was per wheel... but that would just be a lie :(

Gotta give the car credit, though - even though that dyno run took FOREVER to spool up the drums, it tried with all its might. :lol

Was that the 525 or the 528?

isnt your 525 an m20?

oh sorry - yeah that was the m20 powered 525.

Holy mother, that's like a 45 percent drivetrain loss. WHERE THE HELL DO OUR CARS LOSE ALL THAT POWER ? I though average loss for a automatic was ~30 percent...

wow.

120hp @ wheels is a 29.6% loss.

Remember that this is an old car, and is probably not running perfect. Unless you just tuned it up, and cleaned the ports, and changed the plugs and the like. I would guess it is probably down by 10-15% on power just from age/wear. Typical drivetrain losses for an auto are on the order of 20%, IIRC, and manuals something like 10%.

120hp @ wheels is a 29.6% loss.
That comes out to 155 hp total then. Our cars came with 168 from the factory, + include your chip with 8-10 hp increase... and the difference from 120 to that is in fact 45 percent. If your car was stock and dynoed 120, it would be exactly 40 percent loss.

huh?

168 * .296 (29.6%) = 49.728

168 - 49.728 = 118.272 hp.

I dont see how thats anywhere near a 45% loss. 45% is near half - meaning that would be a loss of 75.6 hp... I would dyno under 100hp.

either way = thats enough math - yes even though I have a chip, 132,000 miles and 15 years of age do take it's toll on power output. :)

And no - It's not tuned perfectly - I actually didn't dyno for power, I was having the A/F mixture checked throughout the band to see why or where the car is eating gas. (11mpg on average)

I just thought seeing a car of this size and weight dyno in at a whopping 120hp was sort of funny :D

I DYNO'D my car for the first time! :rolleyes

119.51hp / 120.87 ft-lbs at the wheels. YEAH BABY (yes, thats chipped)

ahaha

just had to share. :stickoutt

:lol :buttrock ..

Jimmy, Behave!

Thats awsome. I need to try to dyno mine some day.

now im afraid im getting something like that :(

how much did you pay just to get that slap in the face??

Jimmy, Behave!

As the saying goes,"It is not the size of the dog in the fight,but the fight in the dog."

If you're going to that meet tomorrow, we should totally race!$# It would be epic. The only way people would know we were racing would be from the sounds of our engines straining.

Well, on the bigger picture, how did you AF come out..Im interested?

http://img246.imageshack.us/img246/4735/mydyno6xo.jpg

I don't know if that tells you much - I'm not too good with this kind of stuff, but one of the guys watching did tell me that it was slightly odd and leans out quite a bit upon accel. :confused

Get yourself a tune-up... those numbers seem very low.

It's had a tune up and all the basic stuff - but still continued to lack a little power and consume a lot of gas.

About a month ago, I had the cat checked out by a local shop - turns out this time while it was on the dyno, one of the guys noticed that one of the exhaust outlet pipes was pretty much cold, while the other was hot. He also said it showed 50 - 100 degree difference between inlet and outlet.

This is a good starting point, I suppose.

Thats lean like amotherfreaker. should be in the 13's on accel, even the 12's under very hard accel

Id turn up the afm one noch after you replace your cat and fix you exhaust and try it agian

Your car really does need a tuneup. Your HP curve dips a lot at 5200ish rpm... that's where it should be starting to peak.

As the saying goes,"It is not the size of the dog in the fight,but the fight in the dog."
Damned little yapping Chihuahua! :biglaughb

Why doesnt he just TCD that thing and get it over with

TCD with 3.91 diff and 275 tires and he'd be so happy

Why doesnt he just TCD that thing and get it over with

TCD with 3.91 diff and 275 tires and he'd be so happy
It's automagic. He'd blow the tranny into pieces.

that GM tranny will hold 250 flywheel hp. Thats all hell get out of an 8 psi kit

that GM tranny will hold 250 flywheel hp. Thats all hell get out of an 8 psi kit
Never knew that. But... including his drivetrain loss, not being able to hold a gear etc, he'll still be no faster than a stock 535 5 speed.... and that car can be picked up for much less than the turbo kit will cost.

Actually since I have the ZF tranny - its good for about 300 crank hp.

Either way - turbo isn't worth the $ on an m20. There are many guys running 10psi on stock internals, etc pushing a little over 300hp - but those are manual e30s and that sure as hell would be lots faster than what I have.

Like I said earlier - 29.6% loss if you do the math from 168 hp and including age, thats not horrid. It's easy to say "oh you need a tune up" etc - but lets be realistic. Put your m20 on the dyno and see. It's not FAR off.

And as I said before, it wasnt all about power - I dyno'd to see my AF mixture for a fuel mileage issue - so obviously she isn't running too great as it is anyway - but I figure I wouldn't gain more than a few HP.

Im not complaining about the power any more these days - just laughing at it! :buttrock

How much did the dyno run cost ? I think I might take mine one day. lol Just to see how it compares to yours.

Did they use steel cables to restrain your car from jumping off the rollers with that much power ? lol

edit: and how in the world do i keep myself from being embarassed as s--t when it shows up with 120 hp ? lol

its like the track guys...

You go their..its about noone but you. You go, you do your thing, you come back, you compete against yourself. As long as you getting better..f*** all the rest of those guys..you bought a car you love..they bought a short road to a fast car

Actually since I have the ZF tranny - its good for about 300 crank hp.

Either way - turbo isn't worth the $ on an m20. There are many guys running 10psi on stock internals, etc pushing a little over 300hp - but those are manual e30s and that sure as hell would be lots faster than what I have.

Like I said earlier - 29.6% loss if you do the math from 168 hp and including age, thats not horrid. It's easy to say "oh you need a tune up" etc - but lets be realistic. Put your m20 on the dyno and see. It's not FAR off.

And as I said before, it wasnt all about power - I dyno'd to see my AF mixture for a fuel mileage issue - so obviously she isn't running too great as it is anyway - but I figure I wouldn't gain more than a few HP.

Im not complaining about the power any more these days - just laughing at it! :buttrock

I like your attitude dude. You drive a nice car, roll with pride. Just don't pick any fights with one of those SRT4's. While my engine's getting done I'm driving a '95 318ti, I feel your power pains.

Greg S.

HE could always do the 323is / eta bottom end conversion thing..that might yank around the fiver better. I cant beleive they ever put the m20 in there in the first place

second of all...you may be so lean your O2 is overcompensating on your fuel

As the saying goes,"It is not the size of the dog in the fight,but the fight in the dog."
says the man with 500hp. :rofl

Did they use steel cables to restrain your car from jumping off the rollers with that much power ? lol

edit: and how in the world do i keep myself from being embarassed as s--t when it shows up with 120 hp ? lol

leave the man alone! :stickoutt

leave the man alone! :stickoutt
I did leave him alone. I'm just asking questions because I drive the same exact car -- a m20b25 e34 ... automatic. :eyecrazy

says the man with 500hp. :rofl

;)

Hey, like 323ijunkie said, your AF/R is really messed up. Most likely that is a clue to both the MPG problem and the power problem.
Many shops can check if your exhaust is cleared out by putting a pressure guage in the O2 sensor bung and measurinng PSI pre-cat.
If the exhaust is clear, take a good look a round for intake leaks: vacuum lines, intake manifold gaskets, etc. Oddly enough, a lean condition can pooch your MPG's same as a rich one.
Air cleaner is ok? All injctors firing and clear?
As a last resort, for power, you could back off the AFM spring about 4 clicks, but it will probably not address the root problem you are seeing.

PS: where are all you other Bay Area peoples at? I am up in Santa Rosa, but driving throught East Bay pretty often.
Colin

Holy mother, that's like a 45 percent drivetrain loss. WHERE THE HELL DO OUR CARS LOSE ALL THAT POWER ? I though average loss for a automatic was ~30 percent...

wow.
avg loss for an auto is about 15%

avg loss for an auto is about 15%
That makes it even worse.

I've had the muffler shop test my cat for flow. They said it was in good shape. (the entire exhaust system) - I didn't see how they checked it, though (and that seems to be a common question)

I dont know if I mentioned it, but while it was on the dyno, the shop mentioned that there was a pretty good temp difference between inlet and outlet pipes on the cat. on one side, the outlet was almost COLD while the inlet pipe was hot. Maybe that tells soemthing. I'll have to see if they can check pressure through the o2 sensor hole since you mentioned that. Thanks.

theoretically, the outlet should be hotter than the inlet, although Ive never ran into it

they always seem about the same temp

Damn, and I thought I had a lean issue with my m20. The best on this run was 144.8. I changed a few things around and got 151 on a later run. Should be up around 160 with it now, need to get it back in the dyno.

FYI - this is rear wheel HP in my '89 325is with a 5spd and MANY mods.

http://www.tmdnet.com/album/albums/userpics/10001/normal_325isDyno.jpg

hahaha, i had a feeling it was at edge!

If you are going to compare dyno tests to another like car, make sure you compare with the same dyno testing machine.

Dyno Jet to a Dyno Jet
Mustang to a Mustang

Otherwise it won't be apples to apples.

So, if SC David goes to Edge and dyno's that would be a great way to measure. Similar car, same dyno.

A 29% loss is not huge, realizing that most cars are near the 40% in loss from the crank to the wheels.

BMW usually runs high in comparison. It means to me that their dyno test on at the crank are probably more accurate than other manufacturers.

I wonder what my E34 would run on a dyno. It has an M50TU with 5spd

Realistically, an m50 w/ 5spd and that mileage should see around 145 - 155 @ wheels.

Dyno to find out for sure :stickoutt

Brodee, nice numbers for an m20! What have you done to it?

Realistically, an m50 w/ 5spd and that mileage should see around 145 - 155 @ wheels.

Dyno to find out for sure :stickoutt

yea, that's what I was thinking too. 235k miles btw :D

Brodee, nice numbers for an m20! What have you done to it?

ACS Headers, 2.5" custom exhaust, Bekkers cam, 19# injectors, JC chip, rising rate afpr, 8mm wires, lightweight flywheel. I just changed out the fpr and am putting in a MarkD 93 octane chip and if the lean issue is gone then I have an m30 afm to put on also. Hoping that will get me up around 160. Should know next month.