Just a Little Comparison

[reelizmpro]

Look at that A/F graph...nice and flat, slowly getting richer and richer. Dyno tuning is the only real way, to see what YOUR particular car can do and what mods work and don't. Looks awesome. Considering most chips sell for $250, $300 is a deal for a custom burned chip, tuned on the dyno.

[E30_fiend]

Look at that A/F graph...nice and flat, slowly getting richer and richer. Dyno tuning is the only real way, to see what YOUR particular car can do and what mods work and don't. Looks awesome. Considering most chips sell for $250, $300 is a deal for a custom burned chip, tuned on the dyno.

werd Barry, werd. we probably did 15 pulls while tweeking the A/F ratio and we finally got it where we wanted it. Its at about 14.7 at idle and at it moves up in RPMs it peaks at 13.4. I think its a prefect mixture.

[THATDONFC]

Taylor, I'm really glad to hear that you are happy with the work Osh did on your car.

Keep in mind, when I swap the "is" motor into my car, Osh and I will be developing a bolt on S/C kit for the m20... :D

[el bob]

Congrats on the progress Taylor. It's great to get the car on the dyno and really see what's going on. :)

Was this a 2.5L "i" M20? I just ask because I'm a bit confused by the numbers. Before I tore down my car in 2006, I dyno'ed it as is, one hundred percent bone stock ('89 325i M20, 112k miles), and it put down 140WHP. Crank HP is rated at 168BHP from the factory. Estimate a 15% drivetrain loss, and you get 142WHP.

http://kai.caltech.edu/e30turbo/BeforeTurboStockDYNO-800px.jpg

[E30_fiend]

Yes Robert its an i motor. The only problem comparing your numbers to mine is they were conducted on two different dynos which most likely put out a different number than if you were to have dynoed your car on the same machinet as me. The dyno we used was a very accurate machine that is calibrated regularly because it is used so often.

I was expecting higher numbers with my setup at first but when I realized that everyone was basically in the same realm as far as low numbers. So if the numbers were in fact lower than they should have been, at least the dyno was consistant in that respect. But seeing as though Osh dynos cars on it almost daily, I couldn't see it being very inaccurate.







Taylor

[el bob]

You're right, I should have mentioned that. Dyno calibration certainly plays an important role.

Can't wait to see where the graph ends up after all is said and done. Sounds like you've got a nice collection of parts and services going into the motor. Buena suerte amigo!

[THATDONFC]

Crank HP is rated at 168BHP from the factory. Estimate a 15% drivetrain loss, and you get 142WHP.

keep in mind that was back in 1990, almost 20 years ago.

[StereoInstaller1]

So, fiend, how is the driveablity? nice smooth throttle transitions, nice idle, etc?

[E30_fiend]

So, fiend, how is the driveablity? nice smooth throttle transitions, nice idle, etc?

Everything is beautiful. The idle is at a perfect 750 at all times. I've noticed that the lag in throttle response has definitely decreased. You know, the delay of foot to the floor and actual engine response. That's much better. And I have never felt an internally stock M20 pull so nicely and my powerband is very usefull as well.







Taylor

[r3vde30]

Look at that A/F graph...nice and flat, slowly getting richer and richer. Dyno tuning is the only real way, to see what YOUR particular car can do and what mods work and don't. Looks awesome. Considering most chips sell for $250, $300 is a deal for a custom burned chip, tuned on the dyno.

+1 - I see the sunsetting on off the shelf chips very soon- that or a substantial price adjustment to true market value of $50-$100

[JMil86]

Man I wish I had an opportunity on a dyno with some expert tuners, nice gains too.

[Jesse30]

those charts look MUCH better. i wanna go for a ride in the car and feel it too. see if i wanna stuff the extra cash for a custom tune on my car.

[e30polak]

those charts look MUCH better. i wanna go for a ride in the car and feel it too. see if i wanna stuff the extra cash for a custom tune on my car.

Build your motor first bitch! :hitler:

[Jesse30]

Build your motor first bitch! :hitler:

cars getting fixed soon. then more junk will go on. :D

[E30_fiend]

Osh is willing to help everyone out guys. And its been 5 days now and I havent had one hicup