The AUSubaru.com.au Forums

If you rebuilt an ea can you put a super charger on it? if yes what type do i need?

what motor is going to be rebuilt for the brumby an ea81 , ea82, or an ej motor ?

TOONGA

I'm guessing that because he said EA and that's it in a Brumby, I'm going with EA81

Forced induction can be fitted to most EA81 but it will depend on what pressure you're wishing to push inside in the engine. Small amounts like under 5psi wouldn't have too many issues but you'd more than likely need to run it on 98ron fuel. If you're looking to go higher pressures you'll need to lower the compression ratio or you'll blow holes in your pistons.

In case you haven't noticed there are a lot of people on here that get a later model engine first (EJ) and then modify it, Easier to source perfomance parts plus more knowledge in the big wide performance world (Not all of it trusted or good) But there are a few Die hards on here that do up EA's and a few light aircraft forums using the same engines doing similar things. Its been done before, I'm sure they're keeping an eye on this post and they'll pop their head in if you tell us a bit more about what you want to do.
Take note of the last post too you can put forced induction on anything (including lawn mowers) but just stay on the conservative side otherwise you will be forever breaking things!

In my opinion.... if you can't weld or have a close mate that can weld the brackets up for you it will cost more than it is worth. The mounting brackets for the super charger is the biggest problem and finding the room to mount it. Bare in mind it's pulley run so the front of the pulley on the SC has to line up somehow with your pulleys on your engine.

Off the top of my head u could use a Power Steering pulley on the front of the engine and not run Power Steering to give u a belt to run it off. Also the SC12 or SC14 from a toyota should work but these run off a flat rib belt. I read something about being able to change the SC pulley to one off a Sigma AC compressor to change it to a V belt. The size of this pulley will determin your boost level... it's very difficult to try and calculate your boost level before u actually get it running. But as a guide i think it is... the smaller the pulley on the SC the more boost... and the larger the pulley is on the motor the more boost.

You will need an intercooler of some sort if your running over 3PSI or on hot days it will Ping... also as mentioned u will need to use 98Ron fuel all the time or it will Ping.

There is a few ways of setting this up... one way (the way i have it on my ej22) I have the SC feeding into the inlet of the throttle body. If you can imagine when the butterflys are closed and the SC is still trying to force air into the system it creates a LOT of pressure so u need an air/bypass system... i have used 2 plum back BOVs to acheive this.

Dave

You might be better off just getting an ej22 in it because the ea81 is hard to tune and cant really put out more then 125 HP without realiability issues