[redbird1]

I intended to post this Thursday night but I figured I would put out a little teaser.
My car is going on the dyno Thursday for it's tune with the new setup. I'm geeked! I've been running a base tune that they put in last fall. Car feels very good/strong.
Here's a few pics.
(IMG:http://img.photobucket.com/albums/v294/Redbird1/engine/e1dc9395.jpg)
(IMG:http://img.photobucket.com/albums/v294/Redbird1/engine/08a5ae20.jpg)
(IMG:http://img.photobucket.com/albums/v294/Redbird1/engine/b9d73198.jpg)

GMHTP had a 383 with ported stock heads put down (uncorrected) 448.5 at the crank. I have AFR190 street port. Not sure if this is better or worse than the ported stocks. Find out Thursday. My hope when I started this was 400 HP at the wheels. Wish me luck.

Steve

[Jon A]

Sorry you had disappointing results, Steve.

First things first, get those valve springs replaced with something decent before you bust one or hurt something else. The springs that come on those heads may be OK for a small flat tappet cam, but they're seriously overmatched with an XE roller. The 918's will work exceedingly well for you but they aren't the only choice.

I knew you wouldn't set the world on fire with huge HP numbers with that cam and those heads (although that may improve some when you can rev it a little higher), but you said you were looking for a torque monster. That's what concernes me--where's the torque?

Of course until we know more about the A/F ratio, knock retard, etc, the tune is something to suspect.

But since your shop did so many other things wrong, I wonder how much faith I'd have in that 10.5:1 compression ratio number. How big were the chambers on the heads? Deck height? Piston reliefs? Head gasket thickness? I'm wondering if the shop didn't slap it together like they do all other street SBC's with a 9:1 or so. Something's not right with that torque number--and that's long before the valve float comes into serious play.