The rebuild happened a long time ago, but someone posted on another forum about the lt1 making a lot of torque down low and I don't remember my dyno graph and breakdown reflecting that. So I grabbed my paperwork and researched stock dyno charts and it seems that at about 2200 rpms a stock LT1 should already be at 200 rwtq. Mine however is at 96 rwtq at 2200 rpm's. Is this an indication of anything? Bad porting or something? The peaks are 290 rwhp at 5500 rpms and 320 tq at 4200 rpms. The peak is decent, but what fun is that if I could be having more down low? I also found out a while ago that they put in a cam from a TPI engine. The cam is a crane #104224 that has 214 intake 220 exhaust duration @.050 lift with a .452 intake .465 exhaust lift. I have much more info if you need it.

 

What is the LSA on the new cam? If it is anything lower than the stock 117 degrees (like 112 or 113) it will hurt low end torque. I bet if you compare graphs the new cam will make more peak torque higher in the RPM band but less down low like you see.

 

You're right it's lsa is 112. It's good to know if that's the case, I have some other problems with it the motor and I wanted to make sure that wasn't one of them. A while after doing head gaskets it started burning oil, now i'm topping off a quart nearly every week.