Got the car dynoed today on a chassis dyno and the car put down 445 rwhp and 422 rwtq...How does this compare to other cars with a similar setup? I was only expecting about 400 whp, provided it dynoed 282 rwhp before adding the procharger...163 whp gain on 7.5 psi!! It was getting really lean on the top end (it went up to 15:1 at 5700 rpm ) so i bought a vortech inline booster pump and it will be put on the car in the next couple of days...i will also be adding a bbk 52 mm throttle body, so we will see what a tb is worth on the dyno..i will post before and after numbers...i will also post the dyno sheet when i get to my house after work

 

Those are some awesome numbers for what you have done!!

 

Yea i can agree...now only if i didnt have that moser 9 inch under there...

 

Awesome numbers, I agree on the 9 inch, I'll help you get rid of it, just drop it off any time :P

 

Nice!

 

I was about to say the same thing.However..if your looking for more power..I have a 10 bolt I will trade you for it.

 

Dang NICE numbers.

 

Dyno correction factors FTL. Given the weather, you were probably about 370-375rwhp actual today. Did you dyno on Bear's dynojet?

 

you think he gained 75rwhp with SAE corrections ...........

 

SAE corrections don't account for the induction style of the car. Forced induction cars suffer significantly less at high altitude than naturally aspirated cars (7.5 psi is 7.5 psi no matter what your elevation is).

75 might be a little high, but I don't think it's as far off as you think.

15:1 AF might have contributed a bit of extra power, too...

 

Seems about right. But you have to get that A/F down to about 11.5-11.7 range. As soon as you see the A/F go past 12.5 I would shut it down. I wouldn't chance hurting anything just to see numbers. My numbers were 438/424 on stock motor with full exhaust and 1.6 rr and no tuning, except for pulling some timing out in the 95-100 Kpa range. I was running a P600B at 8#. Get the thing tuned and enjoy. That is perfect for the street........John

 

It was dynoed my RMCR (Rocky Mountain Competive Research) here in colorado springs...it was on a chassis dyno

 

The highest number the car saw on the dyno was 456 rwhp, but that was the first pull and with no idea what the A/F ratio looked like and when it was really lean. We then adjusted the FMU to get the a/f ratio lower at the top end, which in turn decreased the power to 455rwhp..like said i have a vortech inline pump in the mail, which will bring that a/f ratio down in the 12:1 range...i left the dyno printout at work and wont be there again untill monday, but i will post the numbers in a couple days so you guys can see exactly whats going on

 

I'm really trying hard to be as nice as possible to you, but in short, you have no ****ing clue what you're talking about. This is Colorado bud, our ambient air pressure is right at 12 psi, not the 14.7 you see at sea level. All dynojets utilize standard correction factors, and up here, a 1.2-1.25 correction factor is very common, even in the winter. And in case you dont understand that.. it means that the dyno takes the actual recorded numbers and multiplies them by the above correction factor. him running 7.5 psi of boost up here is the equivalent of running about 4.5-5psi at sea level (in terms of absolute manifold pressure). A boosted LT1 running 4.5psi at sea level making 375rwhp ish, is perfectly realistic.

Actually, supercharged cars suffer equally as bad as normally aspirated cars at altitude. They will have just as much less absolute manifold pressure as a NA car, as the blower isnt spinning any faster to make up for the lost pressure. Supercharged cars merely have an easy way of making up that lost power, by pullying up the blower. As for turbo cars, they do suffer, some more than others. It can depend in large part on the type of boost control system that is utilized. It can also vary depending on how close to being maxed out a turbo is before altitude. If you have a turbo maxed out at sea level and bring it to altitude, it will suffer equally to an NA car. From what I have seen from local turbo guys, a factory turbo car might see ~5-8% loss overall, give or take.

 

first...... dont "try" to be nice to me...I dont give a **** if you are "trying to be nice".....all you had to do is explain it to me..not talk to me like Im some dumb****...maybe I like to give Jakerobb a hard time,or maybe I didnt take more then 2 seconds to think about it...... so...my bad....go get ****ed or something