Help Needed With My Thermal Design Project - Designing a Turbo System for the Slant!

low_kota said
Can anyone point me in the right direction on figuring out what kind of pressure the slant would deliver to the turbo? I am planning on running 8lb of boost which would give me a pressure ratio of 1.54. The engine would be fed air at about 442 CFM or 30.57 lb/min.

I am considering the Garrett GT3782 because it would give me a compressor efficiency of 72% but i'm worried that that the turbine may be too big.
The GT3271 also has my attention but he compressor efficiency seems like it would be a little low. This may not matter because I will be using an intercooler to remove some of the heat, and it has the convenience of an internal wastegate so I could put the turbo right at the end of the manifold.

What do you guys think? The overall goal is a quick daily driver that will peak at 5500RPM

Maybe someone who is actually educated in the science of turbo-sizing will chime in here (Prine?) because I think this is one area that can be approached two ways; scientifically, with flow maps and numbers, or the "monkey-see/monkey do" method, which is the only one I am capable of.

The friend who gave us the turbo we have (nominal 67 mm,) has an identical unit on his Buick V6 (G-N,) and it runs in the tens at 25 pounds of boost (3,500 pounds.) His engine is about five cubic inches (approximately 2 percent) larger than ours and he only spins it 5,400 rpm.)

I can only hope that our engine will respond in a like manner.

Sorry I can't be of any help.:banghead: