Yeah. who would have thought. N/A i was running 12.5 @ 113, my best tonight was a 12.7 @ 108.

Cant complain to much, the car is hardly tuned, it runs pretty rich. My cam isnt ideal, the 4.10 gears are whats really killing me i think.


I didnt know a car with an aftermarket power adder (nitrous, turbo, supercharger) needed a fire jacket. Luckly the tech guy didnt even know the car was turboed.

 

What was the 60'? How does the cam size compare to your NA cam, are they the same heads as before? I would expect you to pick up a lot on 5 psi, even barely tuned.

 

I was expecting more too.

My setup is exactly the same as N/A I just added the Turbo. Cam is a 224/236 on a 110 lsa.

Im hoping its the gears just putting me out of the power band

60' was 2.007

The car "feels" a lot faster. I need to put it on a dyno to see where im at.

 

Yea you should definitely be going a lot faster.

 

How bad could my gears and cam be hurting me?

 

Sounds like a plug/wire/tune issue. You should still be showing a higher mph even w/ gear issues. The point is you should still be at a much higher mph than you were NA, and you LOST 5 mph, that's just about 50hp. Something is not right...

 

What was your AFR's going down the track????

The 4.10 gear needs to go... pop back in a 3:23 or 3:42

Cam's LCA is too tight as well. If you've got a stock one put that back in or get a turbo friendly camshaft.

What are you using to tune with ?

Dyno isn't going to get you anywhere... if you don't have a wideband. purchase that first and get your WOT AFR's in line.... Did you take any timing out of it?
Too many unanswered questions.
Tuning is VERY VERY critical on Boosted applications. You should not even be going to the track if your not super close on your tune.
~Scott

 

Those things are not OPTIMAL, but it did not cause him to LOSE 50hp. He needs to find another 100rwhp before he goes changing the cam and gears.

 

Agreed.... That was a suggestion...

He needs to tune the car... You can get away with a junk tune on a N/A car but it's going to absoultly kill a boosted engine not to have proper timing/fuel. Best case it won't make any power... worst case your taking it all back apart since you burned it down with too much timing and not enough fuel.
Needs to post where his AFR's are and timing.

 

Definitely

 

When I tuned my car to the dyno, I picked up over 120 Hp from my baseline run tuning spark and fuel Goes to show I wasn't even close!

Bill

 

What kind of base spark were you running, and what did you end up with? I'm starting with 16.

 

I was running up in the lower 30's and it was pulling alot of timing, that's where I probably got alot of my gains from. I run 25 degs up to peak torque and then slowly back it off 2 or 3 degs to redline.

Bill

 

AFR is around 11-12:1 going down the track, yes rich. Im using LT1 eit to tune and I am running 25* timing. Any more and I start to pick up some knock retard around 4000 rpm.

I still have my compression from when I was N/A so I was keeping it rich. I am currently collecting parts to build another low compression short block that I have, pretty much just down to finding a crank.

I would like to put it on the dyno to see where I am at right now. I am also going to do some tuning while I am there.

 

dyno numbers don't matter, track times do. You ahve something going on pretty bad. I'd say on 5psi you should be trapping 115-120 probably.