Powering up

[Katesbrumby]

I have a 90 model brumby/brat and was looking for ideas on getting some more power out of it... short of putting in a new engine. What sort of success have people have with exhaust/intake modifications etc?

[NoahDL88]

depending on your emissions laws, a webber 32/36 DGEV carburettor is a good place to start, I don't know if your brumby's came with the EA-71 but an EA-81 is a direct bolt in if you have the smaller motor. Exhaust will help the motor breath well, however i wouldn't go bigger than 1 7/8 inch after the two pipes come together or you'll loose velocity and power.

 

if you're careful you can increase the timing by a few degrees, but you'll have to be careful to avoid detonation.

 

other than that you'll have to start spending real money.

[Phizinza]

Your from Australia right? Which means your '90 Brumby has a EA81. You should be able to put any carb you want on it without much issue as long as you keep the manifold with the EGR stuff :-\

Yours should have a cat in the exhuast so you can't do anything much there apart from make the pipe behind the cat 2 to 2.5" straight through. If yours is stock at the moment you'll see maybe 5-10hp increase with a weber and exhuast, but the weber will give a much better feel and torque curve I think.

 

Other option here is the dual carbs, same as weber for low end but gives you much better high end. Costs around $350 though.

 

I've also found fully rebuilt motors can give more power, but you'll want to test your Brumby against another EA81 car with a good motor to see if yours is laking power or if it is normal (which is just gutless.)

 

Other then that you may as well put in a new motor. Hardest thing there is wiring.

 

If that didn't make sense, it's because its hot and I've had a few beers.

[GeneralDisorder]

There's always the SPFI swap - as good as a weber anyway:

 

http://home.comcast.net/~trilinear/EA81_SPFI.html

 

GD

[Phizinza]

There's always the SPFI swap - as good as a weber anyway:

 

http://home.comcast.net/~trilinear/EA81_SPFI.html

 

GD

 

No SPFI in Australia... import?

[torxxx]

so SPFI on any of the L-series wagons/sedans? I'm tryin to think what you guys call them down there. the legacy is the liberty correct? so any EA series from 94-90 should have SPFI... unless they kept carbs on them in those years.. if they did, I want one!

[GeneralDisorder]

I think they may have all been MPFI or carb. I wonder where the closest to AUS that got the SPFI was??

 

GD

[Phizinza]

I think they may have all been MPFI or carb. I wonder where the closest to AUS that got the SPFI was??

 

GD

Maybe japan. But I haven't seen any SPFI imports.

MPFI was rare, also we got MPFI turbo. We didn't get FT4WD though. We call the 85-94 wagons and sedans "L-Series". And yes, the Legacy was called a Liberty here and they also had a D/R option. I have one of these D/R Lib boxes, but it has a even worse low range then the turbo "L" boxes (EA82t.)

[Katesbrumby]

no worries, sounds like i'm going carby shopping! I know I can pick up the weber pretty easy... i'll see whats around. Thanks