heh, when i got the M112, i had given up on getting and building the 400 i had planned.... after going thru 2 blocks with cracks in it, i had decided to build a smaller motor, (350) and blow that....

but, my last camaro had a 400, and the person im selling it to is now selling the car cheap... im considering buying it and stripping it... that'll gimmie my engine along with all the other lil goodies i put on it...

but.....with the 400, i donno if the M112 will create any real boost.

does anyone know if that will work? thats alot of displacement for such a lil blower..... it already has a lightning pulley, but i havent purchased a lower pulley yet... so ratio can be worked out...

with the 400, im thinking of redlining at 6k... shifting around 5500.. so a 2.33 ratio would give me a 14,000 blower redline...

i recall that as being the rated max speed from the eaton....


a 2.33 overdrive should yeld 260.96ci of air right? and the motor should be 203ci in one revolution.... so it should be making boost.... how much is the question... ?

 

also, while i'll probly get it running untouched first, i have no probs with porting out the blower.... i just need someone to tell me what im suppost to be cutting.. heh....

 

What? Are you too special to look at the compressor map for it on eaton's web site?

FWIW:
400ci + 6000rpm + 80%VE + M112@10,000 = ~10psi boost

In one of the other threads you asked about porting… no good pics, but remember that a lot of the inlet and outlet structures that you're seeing are there to kill objectionable NVH, and it will flow better with them cut out. You can also gain by opening up the inlet as big as you can get it without compramizing the case design and then radiusing the area where it flows into the rotors.

Also, take what Eaton publishes with a grain of salt. Based on info from an "inside" source, they get more efficient as you turn up the rpm, until the point where they self destruct from the rotors expanding enough to contact each other, but that point is significantly past what they show on the maps. My brother's M90 is seeing over 18Krpm going through the traps with no ill effects (look at the map, and you'll see the significance of that).