Porting Eaton M90 Supercharger & Overdrive Pulley Subaru EJ257 

Check out Richard Holdner’s page. He has a bunch of supercharged gm 3800 vids. Dude knows his stuffs

You bring up a good point here ! Unlike the GM version of the M90, this Ford M90 has the bypass valve built into the inlet. You can see that get installed at the end of the vid. This enables the boost to circulate back through the inlet between the throttle plate and rotors, it is vacuum operated, and plumed very similar to the Ford.

I have had this gen 3 for many years, It was intended for a Supra I no longer own. Eventually I'd like to upgrade to the upgraded MP case & inlet. Those flow amazing ! Someday I will get a stronger 6mt trans and add a large Turbo making it a compound twin charged system

@@boostedproblems5139 For the money, m122h blowers would be a good option as well. Would have to get pretty custom with the blower inlet and outlet plumbing but they can support far more power than even a mpx case.

Hell yeah good luck !

@@boostedproblems5139 thanks I finished it up

Nice ! Feel free to share a link I love unique builds ;-)

This is an older generation m90 blower so it did not come with the coating on the rotors. That turns out to work in my favor because I want to use water methanol injection and that would destroy the coating.

Never used it when it wasn't ported. Car used to be Turbo.

More of a before and after, I was working with old camera phone footage.

Not yet, trying to optimize the setup first. had to take a break, because my shop is not heated lol

@@boostedproblems5139 What have you heard regarding maximum hp for a ported intercooled M90?

A few have hit 400whp but I believe that was gen 5 blowers. Mine is a gen 3 so more realistic 325-350. I may get the mp case/inlet in the future. I want it as effective as possible before I add a large turbo to feed it :-)

It has had the initial 20 min break in and an oil change. I'm actually about to go for it's first cruise 50 easy miles no boost and change oil again...

I was started sealing them off with “Lab Metal” but when I saw how it softened when it came in contact with brake clean. I decided not to risk it! Esp since I spray water/meth into the inlet.

Good thing I didn’t actually close them off. I had started to use “lab metal” to close them off but when I saw how the lab metal reacted to brake cleaner (it re softened and went back to a beige color) I cleaned it out and left the ports open. I had always planned to run meth through the blower so I wasn’t taking the chance of it reacting similarly & getting in the rotors and locking up. I don’t agree with the silencer ports being there for performance though. I’ve seen many people on the Supercoupe forums do it with no loss of performance. And all of the aftermarket superchargers like manguson with the mpx90 don’t have silencer ports at all. It’s my understanding that Eaton designed them for manufactures like ford/gm to be quieter, because new/stock cars come with mufflers on the intake and exhaust to appeal to the general public, and adhere to noise regulations.

Both of the songs in this vid are unreleased. I wrote/sang them and my buddy played the guitar. You may be able to find them on my old MySpace page “Travis Seuren”

Its an original by myself (Travis Seuren) unreleased, should be on an old myspace page lol

@@boostedproblems5139MySpace doesn’t work too good. It’s a good song, you should put it on here.

If I was to install a 3rd power adder it would be NOS. For now 30psi from the supercharger and turbo, with methanol injection is good enough for me lol