I have a used Supercharger I was going to stick on my Subaru, it's an Eaton M62 from a 3800 I think. Actually, I'm not sure what it came from...

How difficult would it be to setup a 12a with a supercharger?

I've got the Supercharger, but I don't have enough to build my Subaru up for it (it would cost $2,000 for pistons, $8,000 for tranny upgrades, $2,000 in fabbing intake, $400 for a used TMIC, hood w/ hood scoop, etc).

The 12a was 100 hp stock? How hard would it be to get 130 hp out of it with a centrifigul supercharger?

 

i thought eaton's were roots superchargers.... or something. centrifigul is like a turbo right? hmm alksjfaslkfjaslkfjd either way... the answer to your question:

an eaton m62 can be mated to a 12a very easily.... GRANTED you get the intake manifold made for this. Camden/Atkins is who you are going to have to go thru i believe. once that is done, you would need the proper belt setup to hit all pulley's and then just slap a nice holley on top of it and rock out. get a nice set of SDJ headers or similar and 130rwhp will be hard to stay under i'd say atleat 160rwhp

 

oh crap thats what I want to do !!!!!!
Want to sell it???

 

The M62 (Eaton roots style) is a bit too small but if you are only going for small gains you'll be fine. You will need to custom fabricate an intake manifold or at least a mount for the supercharger. The easy thing to do would be to use the stock 12A intake manifold and make a plenum/supercharger adapter that bolts to it. Instant blower manifold. Racing Beat used this technique on a 12A engine pictured in their catalog. Then you'll need to work out pulleys. I'm not sure about where you are but here there is a great store called "Tractor Supply Company" They sell everything. They have V-belt pullies in different sizes that will definitely fit the blower. They also sell idler pullies that you can use if you make a bracket. Basically it would be easy to get the parts if you have the skills and fabrication ability. The hard part will be with fuel. You can't just stick the Nikki carb in front of the blower. I guess technically you could as long as your blower rotors don't have the teflon strips on them but the setup wouldn't be terribly efficient.

 

10K for fab work and tranny upgrades? good god. try doing some of your own work.

 

eaton sc's are roots type and do have teflon on the rotors (do not send fuel through them).
if it came off a GM 3800 it is an m90 which is the one you want.
if you don't know, on the sides, does it seem round or do the sides of the casing sort of square off? if it's more square its an m90.
also, with an M90 if you don't want at least 200rwhp i'd say you're wasting your time.

 

You can hit 130 hp with exhaust and upgraded carb, without the supercharger. If that's all you are shooting for, take the easy way.

 

Yeah... There's a guy within a decent drive of me who supercharged his Legacy Wagon, he had a Nitrous setup on it, it literelly cost him $650 to put the M62 supercharger in it. Then again, his engine is a 2.2l motor that often sees 40+psi of boost in track setups. He can help me with the mounting of the charger, do the pulleys, and there's a good place local to him that I can get belts from.

As for fueling, I was thinking about running a low octane gasoline (mixing in small amounts of heptane with the gas to make it about 86-84 octane), and countering that during boost with alcohol injection. I don't want to make this too complicated though...

With an M62, how much boost should I be able to make at high rpm? I know the blower itself has a rev limit, which I don't intend to go past. I'm not exactly aiming for a large amount of boost, looking more for powerband than peak boost (I'd rather make 70 hp+ for most of the rev range on the engine). Looking more at a balance of high rev limit on the motor and boost.

I'd like to get the setup running before worrying about fine tuning or anything more than basics. Maybe run a single fuel injector and Nitrous to lean it out until the boost from the supercharger comes up. (That was the plan for the Supercharger anyway).

I know it's an M62, just not what it came off of. :p I'm not aiming for limiting it to 130 hp, just saying that when all is said and done, I'll be happy if it's making more than 130 hp. If I get done and find that I have 300 hp, I'd be really esctatic. ^_^

Well, yeah, stock second gear would shatter with 230 hp, stock block cracks to bits with 6 psi unless you build for it. And, no, that's $8k for just tranny parts, $2k for 1-2 gear, $2k for 3-4 gear, $1k for 5th gear, $4k for front, center, and rear diff upgrades, and another $1000 for axles/hubs/spindles. Or, $6k for a 6 speed from an STi, $2k for rear diff, and another $300 for misc install pieces (mounts, etc). Pretty scary, really... This was going to be a 350hp/350lb ft monster, and on top of that, I was going to need another $4k in suspension upgrades, $3k in paint work, etc etc etc. Too expensive, lmao.

Naw, that's okay, if it doesn't work on the SA, or the Subaru, I can always put it on my dad's T100. You can occasionally find them on Ebay, some come with an electronic clutch that makes installing easier.

 

you're going to neeed to underdrive the hell out of it too keep it from running out of breath.
not to be an ***, but i'm going to call shenanigans on your friend with a 40psi m62.
they are such shortwinded SC's, at 40 you'd be losing massive horsepower due to heat.
you might see a gain downlow, but i seriously think an m62 would lower your effective max rpm.

Ps: i feel you on the expensive tranny upgrades for certain cars.
I have a SHO and aftermarket on them is terrible.
there is 1 quality differential and it alone costs 1200.
parts to make the tranny take any sort of beating are 6000, no one makes them but a lone custom shop.
Just so ya know, it takes very little to grenade a SHO diff, a few burnouts, and poof.
the tranny lets go at about 300flywheelHP.
if you browse the SHO forums you'll see a few 500+hp SC'd and turbo'd guys that either A: buy the really expensive gear kit or B: change their tranny 3-4 times a year.

 

Red's running 8 PSI of boost in a non-built Subaru 2.2l motor. However, that same block, running 8.5:1 CR pistons and with turbo cams and really high flow heads, can take 40+PSI without block work.

As for the Supercharger I've got, it's not going to get underdriven, as I don't have any of the stock pulleys that came with it. I'm going to end up fabbing my own pulleys for it. If I can find a M90 with an electric clutch, I may jump on it, but I need to get my Legacy fixed before I can buy more parts.

I'd like to have a fun car, and my Legacy is a bit too nice to keep beating on. I still haven't paid it off and I've killed the front bumper and right side doors... So, I'm going to end up getting a 7 project car and possibly a Supra fun fun car.

Does the SHO have a drive tunnel? Maybe convert it to AWD or RWD? That would be the first thing I'd do with it. If no tunnel... I thought FWD became a little excessive with wear problems after 230 hp at the wheels?

My tranny in the Legacy won't gernade, but I can easily strip all of the teeth off second gear without hardened gears, or a Forester XT transmission casing (it has an extra support to keep shaft flex to a minimum, which is what causes second gear to turn into a hub with no teeth on it).

 

so I know that this is an old thread...but I am subaru guy and feel the need to clear some things up. There are two different types of EJ22 engines. the one that red wagon is running is the much more common ej22E that is like 9.7:1 CR and really isn't really super strong (red's on his fourth motor rebuild I believe, the pistons have a way of cracking ringlands). the block that can take all the boost is the old legacy sport's ej22t. they made that engine for like 4 years and good luck finding one. It's bulletproof for sure, forged everything, closed deck, piston oil squirters, but very rare. You should go over to NASIOC.com if you think that your tranny wont gernade, it's all how you drive, but people making any kind of horse on the n/a pull-type trans live with clutch slip that keeps their trans alive. the only types of subaru trannys that can take the stress are the turbo push type clutch transmissions