smokinlmm -I don't know the differences! could you explain the differences in layman's terms ?

 

They use stock bolts. Of course GM performance would say that, I would at least change the cam.

 

Compounds one larger turbo feeds a smaller turbo compressed air which then gets compressed again. Sequential turbos smaller turbo spools up first then gates exhaust pressure to a larger turbo which takes over boost without assiatence from smaller turbo. True twins are seperate spooling turbos indepently feeding intake tract.

 

Twin 7875’s would be over kill for a 376ci, look for something smaller. What’s your hp goal? That’s how you size turbos, not based on boost.

 

^^^ Yep, need to match your cfm up to your goals, boost dosent mean ****, it's just a measure of the restriction of air...

 

Ok you guys are correct on the boost so Lets say power goals of

1000 HP

1250 HP

1500 HP

1750 HP

 

from hot rod mag. It can hit over 1000 HP with a precision PT7675 featured a 76mm compressor wheel, GT42-style compressor housing with a V-band discharge flange, and a 75mm (84 trim) turbine wheel and Equipped with the Brian Tooley Racing Stage 3 turbo cam and Holley Hi Ram intake,
The final 1,082hp (top) run continued the trend, starting at 23.2 psi before dropping down to 18.8 psi.
Data logging showed the backpressure to exceed boost pressure by more than 10 psi (and climbing) at the power peak
so
@ 836 HP / 10.5 # = 79.61 per # of boost
@ 951 HP / 14.6 # = 65.13 per # of boost
@1083 HP / 19.5 # =55.53 per # of boost

so 30# of boost x 55.53 HP per bound of boost should net 1665.9 HP or a little better because of twins lowering the high back pressure ? IDK.

 

This thread is full of win

everything from magazine racing to throwing around useless qualifications about build quality and value

good luck man! You claim to know enough to know you want 2000hp, but yet you can't read a compressor map?

Hmm

 

that’s one, your talking about two. Not sure what your point is. So your power goal is 1000-1750hp?

 

YOU ARE CORRECT Sr. that is why im here asking questions .... ive tried to read the maps but cant understand them.