Fritzjd2

Purchasing my M90 eaton tonight and looking for a little advice, the truck is an 02 sierra 5.3, 212/218 522/529 112lsa cam, hardened pushrods, pac 1218 springs, LS1 efans, Longtube headers ory with a cutout at the end of the Y. Currently have it tuned by justin at blackbear. I am pretty good with fabbing and dont think I will have an issue making the sidemount. I was going to go ahead and pin the crank while I'm at it.

My major questions are what upgrades to the fuel system will be needed if needed at all? I assume it will at least need bigger injectors and possibly a pump but don't have a clue what size.

I also am not famliar with forced induction systems. I think I am going to run an air/air intercooler, but aside from the supercharger and intercooler what else will I need ie blow off valve, bypass valve..

My last question is will my truck throttle body bolt up to the m90 from a grand prix and if not does anyone know where an adapter plate can be found?

Thanks in advance

FFDP

iTrader: (2)

It likely won't bolt up, unless your throttle body has the same pattern and fits on. Then you need to figure out some sort of gasket.

The M90 has a BBV right on the side.

And just so you know the stock 3.8in pulley would only make 6-7 psi on a 3800 from the factory, so add 2 more cylinder and boost will go down. You will likely want to step down to a 3.0/3.2 or even like a 2.8 to spin that thing fast enough to make some boost.

I own a pontiac myself but never heard of anyone doing one with a 5.3.

Pro52R

iTrader: (16)

Its a tiny supercharger. It's going to be way inefficient imo.

N20zuki

I have to agree, I have a M112 and that's even too small to make decent power. On a bone stock 5.3 with nice flowing exhaust I am making 8lbs on a 3.0 pulley and cranking out 430whp and that is in a car with a T56.

If you were to fab anything I would of bought a MP112 or a M122 from a GT500 or Cobra and built from there as it will atleast support the air you will need to make power.

I remember somewhere a guy did a build going from a M90 to a M122 and then some other bigger blower and the M90 made 2-4lbs of boost pullied down and lots of heat.