Supercharging an EA82

Sideways Subaru · Post by **Sideways Subaru** » Wed Mar 15, 2006 10:57 am

Hi all i'm lookin for a way to increase power in my carbed L series and am thinkin of a supercharger as i wouldn't have to change engines to install it ie i don't need a fuel injected motor. has anyone had experience with a blown ea82? and what supercharger should i use-i was thinkin of a toyota unit or similar. thanx,

Big Al

tim_81coupe · Post by **tim_81coupe** » Wed Mar 15, 2006 7:09 pm

This is something I have investigated quite a bit.

The unit I was looking at running was the Aisin SC12 (off the Toyota 4AGZE). You could run the SC14 (off the Toyota 1GGZE) but I feel this is a little large for the EA82. I wasn't going to lower the compression at all as I feel the Subarus are quite conservative in this respect and any money spent inside the motor is a waste I think (seeing as I'm getting good at this EJ thing). The stumbling block I hit was what carby to run. I'm not too good with carbies and finding a blow-through type was hard, and then tuning it properly to suit the motor and the blower would be a whole different ball park.
I had in mind a conversion to SPFI, either buying the gear off someone in the US (some USDM EA82's came factory with SPFI) or adapting the Camira gear to fit (has been done).

In the end though I decided to turf the idea, argument being that with a little more money I can go stick a turbo EJ in my wagon and ultimately get a more reliable and powerful motor.

Pete · Post by **Pete** » Wed Mar 15, 2006 7:57 pm

I know Steve did one of these a few years back and probably more since then. I had my EA82T Brumby at the time and had a chance to drive both one after the other.

The turbo rocks for all out HP, but off road the supercharger beats it hands down. You would need to get a bit creative in the setup to make things look neat, but other than that I would choose the supercharger for drivability any day.

I can't help you with the specifics, I am sure Steve will be able to set you in the right direction.

rsrlegacy · Post by **rsrlegacy** » Thu Mar 16, 2006 12:13 am

Like Pete said, Steve Rising Sun has 1 currently in his buggy from the 1GG. The 4AG is too small.

subanator · Post by **subanator** » Fri Mar 17, 2006 12:19 am

I would be starting off with a MPFI engine for the reason it would be easier to compensate for tuning than a carby one. But if thats what you have got now (carby), I suppose that will be possible as its has been done before with Turbos with a blow through set up.

daza · Post by **daza** » Fri Mar 17, 2006 8:26 am

Hey xela,
from all i've heard it's the least efficient way to do things, but, all the v8

guys do is stick the blower on with a holly up top in draw through. Seems to work for them.

And a side draught weber would probably fit on top of the toyota blower on a lifted suby...

Daza.

BRUMBERTY · Post by **BRUMBERTY** » Fri Mar 17, 2006 9:03 am

Petrol eats the seals in toyota blowers.
No good for suck through unless you use LPG.
Get a mercedes benz one on ebay from a kompressor motor, basically an Eaton Unit. Around $300 US from the states.
This is your only real option with a petrol motor.

steve_rising_sun · Post by **steve_rising_sun** » Fri Mar 17, 2006 12:54 pm

We have run the 1GG blowers for years on petrol with out effect.
Use the carbie from the Mazda 1600 van. Its a side draft 2 stage and easy to rejet. Dont forget to heat the manifold, carbie to blower
Steve

BRUMBERTY · Post by **BRUMBERTY** » Fri Mar 17, 2006 1:02 pm

steve_rising_sun wrote:We have run the 1GG blowers for years on petrol with out effect.
Use the carbie from the Mazda 1600 van. Its a side draft 2 stage and easy to rejet. Dont forget to heat the manifold, carbie to blower
Steve

Well bugger me, I am glad to hear that, my appologies for passing on bad info.
The jet boat has just taken on a different path of fiendish horsepower questing.

MUDRAT · Post by **MUDRAT** » Fri Mar 17, 2006 1:06 pm

I'm interested when you talk about heating the carby-to-blower manifold.

Sideways Subaru · Post by **Sideways Subaru** » Fri Mar 17, 2006 2:39 pm

Thanx for all the input fellas i think i'll start lookin around for an sc12 unit-theyre about $400 bucks aren't they? and has anyone got pics of a blower setup in a suby-i'm crammed for space and would like to see where ppl have mounted the blower thanx

Big Al

steve_rising_sun · Post by **steve_rising_sun** » Sat Mar 18, 2006 8:45 am

MUDRAT wrote:I'm interested when you talk about heating the carby-to-blower manifold.

We run the blower as a draw through [its the only way] if you dont heat between the carbie and blower driveability is poor until she warms right up.
Steve

MUDRAT · Post by **MUDRAT** » Sat Mar 18, 2006 10:36 am

Is that because the vapourised fuel starts precipitating under the pressure from the blower?

dirty skirt · Post by **dirty skirt** » Thu Apr 06, 2006 7:16 pm

would everything be the same on a ea81 if you used all the same gear as prescribed

dirty skirt · Post by **dirty skirt** » Thu Apr 06, 2006 7:19 pm

how would you heat the manifold with coolant or exhaust gas aqnd where would you get a manifold from

t.ridden · Post by **t.ridden** » Fri Nov 08, 2013 10:54 pm

Hey all, sorry to bring up an old thread

just wondering if anyone running a supercharger on an ea82 has a comment on the reliability, i know the turbo'd ones have a less than good reputation?
I'm considering (in that vague kind of "if i had money" way) getting my carby ea82 rebuilt and putting an sc12/14 on it?
if anyone has any better suggestions or personal experiences, i'm happy to hear them too

Cheers

YouTube · Post by **El_Freddo** » Fri Nov 08, 2013 11:45 pm

t.ridden wrote:just wondering if anyone running a supercharger on an ea82 has a comment on the reliability, i know the turbo'd ones have a less than good reputation?

I just want to clarify the "less than good reputation" of the turbo EA82s. These have this reputation generally due to lack of maintenance - if you're going to flog something you need to look after it as well! Otherwise things do fail regularly!

If you think the EA82Ts are no good, then the EA82s in general would be much better right? Then add a blower to it and...

All that aside, if you've got a good EA82 and you look after it I'm sure they should be fine with a blower, just don't go crazy on the boost.

Best would be to start with an MPFI setup, even better if you get a turbo loom - it'll run a fuel map for on boost and off boost from what I've been told. I don't know if the NA MPFI system would do that.

One way to find out though! Have a read of Tweety's EA81 supercharger setup, there's some good info on there even though he decided it wasn't for him in the end.

I don't know of anyone on the forum running a supercharger on the EA82, I'm not even sure if this thread ended up with one running :/

Cheers

Bennie