pianoprodigy

The high torque of the EVO can be explained by the quick spool of the stock turbo. It is probably hitting 29 psi very early in the revs and building a lot of midrange power; however, I'm sure it is running out of steam on the top end.

matty

i consider power band to be wherever revs fall to after shifting from one gear to another. so whats that....5800rpms if u shift @ 8k?
just went and got my dyno..the car makes340ish @5800, 350 by 6100, 360 by 6300, tthen holds 360 till 7200, drops off to 350 till 7500, the drops to 340 by 8k. so basically 20rwhp range for 2200rpms. with the avg being arouind 355 i would say. having said that i think trex's car would make more avg rwhp than my car for the power band. thats different than what i was thinking
Sorry i cant post it...dont have scanner.

this is on stock twins stock motor.

Trexthe3rd

I don't know about that. From the dyno the power drop is less than my car (RX6 hot side is tiny, it runs out of steam on stock ports easy).
Also worth noting is that, when comparing the two dyno's I noticed that by 4500 rpm, the EVO has alread hit 360hp where my fd only hit 270.

pianoprodigy

I'm unclear as to what you doubt in my post. Boost creates displacement which creates power under the proper air/fuel mixture. He's running 29 psi very early in the rev range due to a small, quick-spooling, stock turbo. The turbo is cramming a huge volume of air into the motor very early on in the rev range creating the requisite 420 lb/ft of torque @ 4500 RPM to create 360 whp. Where the rotary shines is with a properly sized turbo which (among other factors) allows the torque (albeit less than most any 2.0 liter or greater piston motor at the same boost) is being able to maintain that torque over the RPM range creating WHP which creates acceleration. If you were to race him from 2500 RPM in 4th gear, he would walk you much more badly because he produces the torque earlier in in the rev range. He would be long gone before you began to gain your advantage by maintaining the torque over the upper RPM.

Edit: I just reread the post and I guess you're talking about "running out of steam on the topend." What I meant by that is his torque dropping off. He could still maintain enough torque to pull you badly; however, if he had a properly sized turbo, he could both have quick spool (though not as quick) and maintain the torque longer over the RPM range creating more horsepower.

Jasil

That is exactly why the EVO has high TQ numbers in the midrange. The boost hitting 29psi, but being too small to keep that boost pressure it falls back down to 19-20 at redline.

YELLOWGSLSE

iTrader: (7)

Trex, will you be at the BP tonight?

Trexthe3rd

yes

G's 3rd Gen

iTrader: (11)

To help clear my end up I was not making 340 @ 3500 but 240.. Sorry for that.. It is about the same as Matty's but about 10-15rwhp more.. Large street port ,much overlap, stock twins non...

ct9a gsr

Interesting conversation...

I'm the owner of the Evo that Mike raced... just thought I'd drop by and say hi. ^.^


Here's a link to the runs on video:

Evo VIII GSR vs FD TT

My apologies about the incorrect whp/wtq #'s in the beginning of the video... didn't know the exact #'s.


Also, for anyone's curiosity's sake, a link to my dyno graph is in my profile. It's the power I currently drive daily with. Mike's car is very fast... and so was the Viper. I kept telling my buddies that there's no way in hell I'd win agains either of them... then again, I rarely ever go into a race thinking I'll win... I 'tend to race a lot of cars I expect to lose to. Check out my site for more videos (also in my sig)... I'll have the Viper one hosted later.

Jasil

Good for you to post and that did not look close at all. Buschur stage 4 is a great start.....now just throw on a AEM and his GT35R kit or wait for the new one with upgraded wheels and you can trap 140mph like Dan does.

fd3virgin

i raced a 380+ evo from a roll in my t-78 with 16psi.... i didn't have much truoble 3 cars by 130+ but he did have his gril in the car. i have a custom system with a roll bar so about the same i guess ( a petite girl). i have an evo also and that thing spools so fast on the stock turbos. i will wait till i get it up near the 400 awhp let my brother race it against me in the fd. but i will hopefully be running 25-30 psi in my fd by then. kevin