Dyno Guesses & Bench Racing Forum - Big hp? or Not?

I have a 69,000 mile ls1. It has a fast lsxr 102 intake with a 92mm tb and 30lb injectors and an 85mm maf. The cam is a comp cams 228r with upgraded springs and pushrods and has yellaterra 1.7 ratio rockers. It has underdrive pulleys and 5.3 ported and polished heads. Exhaust wise I have a set of pacesetter long tubes and an or/y going out a hooker aerochamber also has a cutout. It's all paired to a built t-56 with a monster stage 3 clutch. What kind of power numbers should I be looking at? And with drag radials what kind of 1/4 mile time will be looking at. I can rip a 6 speed pretty damn well.

Come on guys..... Let's make it interesting. Whoever guesses the closest rwhp will get a free signed shirt by me

Probably in the neighborhood of 430 hp, that m6 will help the dyno numbers a bit. I'd say mid to high 11s if you're on stock suspension with a good driver and good air

Its hard to guess as many dynos come up with far different numbers. But I'll take a stab at it anyways, 436whp.

sounds like pretty close guesses. ill let you all know the dyno numbers once i get the motor in my car and dynoed. and as promised ill send the winner the signed shirt haha with the dyno numbers on it

I want a free shirt...
Im going to say 440whp :)

I'll say 432hp

Well.. whos the winner!?

426 rwhp

Well the car is officially done... sorry it took so long it was a weekend build and there were some opsticals to overcome..... We went to start the car tonight and, nothing :/ Lights are on, radio is on and you go to crank the car and nothing happens. What could be wrong??

Well the car is officially done... sorry it took so long it was a weekend build and there were some opsticals to overcome..... We went to start the car tonight and, nothing :/ Lights are on, radio is on and you go to crank the car and nothing happens. What could be wrong??

you weren't very clear. so the engine does not turn over at all? thats certainly a starter issue, if you been fidgeting with the engine id check the ground cable for it myself and if its ok then take the starter in to a auto store to get it tested. (but im no mechanic)

Yep check the starter.. I got a new one and put the signal wire on the wrong post per the directions included.. turned out to be the opposite post.. 3 total on my starter

Where does the ground wire connect to the body or where? Its the really long ground wire. And we are going to try a new starter. The motor came out of another car and so did the t-56. The original 4l60e just wasnt as much fun

Where does the ground wire connect to the body or where? Its the really long ground wire. And we are going to try a new starter. The motor came out of another car and so did the t-56. The original 4l60e just wasnt as much fun

stlz/28, from what I understand the PCM programming for autos and manuals are different. Did you swap your stock PCM for a manual trans PCM or have it tuned for a manual trans?
I once sent my stock PCM (car was manual trans) to a tuner for a basic tune after a heads/cam swap and he accidentally tuned it for an auto trans car. When I tried starting it with the PCM tuned for an auto trans, the car had all kinds of weird erratic problems.

As far as your car not cranking over, the different PCM's won't affect that.

I'm not sure on the fBodies but is the BCM and ECM linked or did you transplant the entire wiring harnesses and computers?

We transfered the computer and the part of the 6 speed wiring harness.

Sorry part of* not the part of

The clutch switch will keep it from starting.

We got it all sorted out we had to switch the bcm. Hopefully looking to get it dynoed in a week or two and ill let you know who the winner is