I cant find a compressor map on the eaton website. I was curious, I'm doing a big cube stroker for my Z and have been carefully building it with parts for driveability purposes. I was considering using a blower but I like roots blowers, and was wondering if the m112 could supply enough for 6-8 psi on a 434. I know I cant spool it up that high, I was thinking the shift point would be 6200 RPM tops. I have limited room, so I couldnt use a full size blower, though the 112 will fit. I figured it might be good for maybe 150 HP but a ton of torque on a motor of that size with 8 psi. It's either that or stick with my single plane, and save the blower for my 383.

Like I said, I cant find a compressor map for some reason so I dont know for sure if that would be possible. I know I could do it if I put a smaller cam in it, but hell, that's pretty small. Let me know your thoughts, or if you know where I can find this info, thanks

 

i don't think that a M112 will be big enough for that 434. I found this in a thread:
Courticy of 84z28350:
"To estimate your boost:
25.58 x A x B | C = XXX - 14.7 = boost
A=blower displacement
B=blower drive ratio
C=engine displacement (ci)"

So in this case 25.58 x 112 x 3.00 / 434 = 19.80 - 14.7 = 5.10 psi boost
and with a 3:1 drive ratio your blower will be spining 18600 rpm, and making a fair bit of heat. Even the 383 is a little big for the M112.

 

the eaton M112 i had was too small for my 408.... it was a mild motor too, Dart iron eagle heads, reasonable roller cam...
i ended up ditching it...

either go twin eatons, or find a different blower... a D1SC or F1 would work great... yes, they're centrifugal blowers, but they also flow enough volume that they provide boost early on.... especially the F1 series blowers.

 

I've done alot of work with the M90's. I've seen them go and go but a dab of grease for the rear bearings (vs. a case full of lube) never sat well with me.

 

Well, my brother sees 10psi using a slightly modified M90 on a .030” over 302, shifting just over 6000rpm. It moves enough air to send a 4door LTD to high 10's @ 120mph with a wasted short block (the thing has enough blowby that you can see it at idle comming out the breather and then the hood seams...)

So do the math, in theory it is quite possible. And there is a compressor map on the eaton site.

 

youd need something like a 2.3-2.8 kb