quote:Originally posted by Panterror:
Have a few Qsquote:I purchased the car with a built and stroked 377 with the Australian 2v heads ported.
So was it an engine purpose built for boost? Or was this a normally aspirated stroker? Do you know present static compression ratio and cam?quote:I have the car running on twin T66 turbo's, and we ran it at 10psi up to 6krpm, it isn't even thinking about laying down. It made 630hp to the tires on pump gas, and looked to hit 650 if I spun it to 6500.
How are you managing detonation risk. Intercooled? Alcohol?quote:I know the rods and pistons are up to the task,...
Aftermarket I take it as a result of stroker. Is it an offset ground stock crank with Chevy journals?quote:but am a little concerned about the main/rod bearings the most.
A well founded concern. Is this a solid cam with oil control mods? Restrictors? Bushed lifters? If you're making 630hp at the wheels with a stock Cleve block, that would suggest mid 700s at the flywheel. You didn't mention what the bore is sitting at but considering it was stroked, I'm guessing it's at least .030" over. Also didn't mention 2 or 4 bolt main but really doesn't matter much in a standard cleve block. IMO, if you intend to regularly tap that power, I think it's a matter of time before you grenade, especially if you keep pushing the rpm limit North. You will likely find that limit is cylinder wall or lower end failure. With that kind of investment in your build, a good bottom end and aftermarket block would be a wise investment. I understand the concept of "It's Never Enough", but 630hp at the wheels of a street car, especially Pantera, is fairly interesting. Might want to pause there and enjoy for a while heading North on the power curve with that build.
You might want to seek out Dave Doddek. He has been this itterative route on boost.
-My 2 cents.
Kelly
The engine is offset ground to 377, so I am guessing the chevy journal, but can't say for sure. It is a 4 bolt main block with all the oil mods, manley rods, J.E. pistons. The engine was built by E.J. Poss years ago (it's actually his old 71). I own a company called Professional EFI Systems, and my computer is running everything. It now has coil on plug, and direct port injection, staged methanol injection (no intercooler), and boost control. I have the ability to monitor knock as well, but haven't figured out quite where I want to put the knock sensors. I have had several single digit drag cars, and agree the car is plenty fast for the street, so I want to enjoy it for a while. We do alot of the high horsepower small engine cars with the staged methanol injection and it works great! The reason I was asking about the rpm limit is because as you can see in the attached Dyno sheet, it looks like it wants to go to about 7500!
