Eaton M90 or Eaton M112?

-
Your injectors are not going to hit the valve on a slant from behind the mounting flange. Its a blind turn and a very small window from the intake side, use narrow pattern injectors to minimize wall spray or mount so injector snout is inside the port.

shot3.jpg

valve.jpg

PS>> this is actually more for emissions as plenty of OEMs ran a blind injector and after about 2800 RPM, your not sequentially injecting to an open valve anyway, valve train is running too fast. This was my solution to running any unmodified intake you wanted as heads were cheaper than aftermarket intakes. I found a 3/4 hole saw worked better than a drill at the angle I had to drill at, but on a mill~ childs play. Caddy Northtar fuel rail (stainless, not the cheap rubber daisy chained ones) has proper 3.98~4.00 spacing: cut the 3 off at each end and braze together for a straight 3+3 six log, perfect stainless fuel rail.
 
Last edited:
pishta said:
Your injectors are not going to hit the valve on a slant from behind the mounting flange. Its a blind turn and a very small window from the intake side, use narrow pattern injectors to minimize wall spray or mount so injector snout is inside the port.

View attachment 1715148682
PS>> this is actually more for emissions as plenty of OEMs ran a blind injector and after about 2800 RPM, your not sequentially injecting to an open valve anyway, valve train is running too fast. This was my solution to running any unmodified intake you wanted as heads were cheaper than aftermarket intakes. I found a 3/4 hole saw worked better than a drill at the angle I had to drill at, but on a mill~ childs play. Caddy Northtar fuel rail (stainless, not the cheap rubber daisy chained ones) has proper spacing: cut the 3 off at each end and braze together for a straight 3+3 six log, perfect stainless fuel rail.

View attachment 1715148679
Click to expand...


This is great information, thank you
 
also remember the Eaton is a dry charger, not designed for fuel injestion. Ask around about the Eaton teflon seals under a carb/TBI if they are methanol rated as they may not be. Just a warning as that would suck balls if the seals crapped out on you after you got it all engineered and found your boost pressures are minimal. Happy blowing! :lol:
 
most blowers have there own oil and dose not mix with oil in the motor! the eaton m90 is like this and uses special oil! roots style blowers have drain, fill, and sight holes made in the end plates as well but on the detroit diesels thay come from thay oil from the engines oil system.
 
pishta said:
also remember the Eaton is a dry charger, not designed for fuel injestion. Ask around about the Eaton teflon seals under a carb/TBI if they are methanol rated as they may not be. Just a warning as that would suck balls if the seals crapped out on you after you got it all engineered and found your boost pressures are minimal. Happy blowing! :lol:
Click to expand...

Thank you for confirming this!
That's one of the other main reasons I want to run multi port fuel injection, instead of carbs
 
dirty white boy said:
most blowers have there own oil and dose not mix with oil in the motor! the eaton m90 is like this and uses special oil! roots style blowers have drain, fill, and sight holes made in the end plates as well but on the detroit diesels thay come from thay oil from the engines oil system.
Click to expand...

Precisely why I'm not gonna plumb it to my engine oil
 
You must log in or register to reply here.
-

Back
Top