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G'day all

Just wondering what I sould power my 92 Brumby with. It currently runs the old EA81. So In the future im looking at replacing it wether it dies or i get horrible leadfoot diease. I was wondering what i could replace it with, but i need the dual-range transmission. And what would be required to be done to it.

Dan

What kind of car do you want post new engine?
There are tonnes of options depending on this.

Definitely get an EJ engine, that's a given these days.

A single overhead cam engine will slot in nicely and not require the chassis rails to be widened.

A naturally aspirated one (non turbo) will still be a great increase in power but still allow you to run either your original gearbox or ideally the easy upgrade to an EA82 5spd dual range.
These come in EJ16, EJ18, EJ20 and EJ22 (1.6litre, 1.8litre etc). They range from about ~75kw to ~100kw on that scale (roughly). These are all available in single overhead cam.

The conversion to these engines its relatively easy and straight forward. Have a read of the huge sticky thread in the conversions section for all the information you need on specifics.


Other than that you can go the more extreme route of EJ20turbo motors. These are quad cam and require modification of the chassis rails and ideally a turbo AWD gearbox - it's a much more involved conversion.

or a shop rebore rebuild of the EA81 as I did for my 92 Brumby and went nice little cam from Watson Race cams, hauls arse and 609 kms to the tank

EJ22 & d/r 5 speed 3.9 from Liberty wagon doner car.

When you say you need the dual range transmission, so you mean you need it to be 4wd, or you need the better gearing option when going slow?

I's suggest an EJ22 and 5sp L series gearbox. Might want to throw in a 2" lift while your there to make the gearbox fit in without bashing/cutting..

But a well built EA81 can cost half as much and give you pretty good power. Like steptoe said plus a Weber.

Phizinza wrote:When you say you need the dual range transmission, so you mean you need it to be 4wd, or you need the better gearing option when going slow?.

I need dual range for 4wd, for some exploring and working.

I will finish pulling the last few bits off of my brumby this weekend before it goes off to the painters. While it is there I was intending to rebuild the standard ea81 with a few improvements.

I have since purchased an ea81t and will be rebuilding it instead. AndrewT did warn me that I would just end up getting overtaken by a 15 year old hyundai but there were no quality ej engines for a reasonable price that I could find in Darwin (one wrecker quoted $2000 for an ej20 with 250000 on the clock).

Will I be able to do all the same mods (port heads, lumpy cam etc) with this engine as the standard ea81? Are there any other mods/improvements that I should look at. I'm not expecting a rocket but I want to get as much as I can out of it.

Not out in the mulga the Hi-bye-dai won't .

I think an EA81T is the best option in a Brumby if you don't intend to put money into serious performance suspension and brakes , this is a cross country ute after all .

From what I'm told EA81Ts put out ~ 98 Hp vs 68 and the mid range torque should be noticably better than a worn single carb EA81 NA .

A little cleaning up of the heads and if theres enough clearance between the valves and pistons a smidge off the case decks to raise the static CR a smidge to say 8.5 .
I'm not sure what turbos the 81T ran but possibly an EA82 one would be better - at least they are cartridge replacable and rebuildable .
Cam phasing is different on the 81T because it shares the same valve and port layout as the EAxx twin carb - and EA82 carb version .
There is a mob in the US that does EA81T cams - search USMB .

Cheers A .

Everyone always leaves the EG33 off the list!

What's an eg33?

3.3L 6cyl version of the EJ engines found in the SVX (rare in australia).

EJ22 is easy, reliable, tough. And much easier to find then something like a EA81t.

3.3L Flat 6 from SVX, as in the red Brumby.


Beat me to it Phiz!
Daza.

Much to my disgust and a little bit of embarresment I am actually considering putting a small bonnet scoop/vent on the brumby to provide air to a small intercooler. Is this necessary/worthwhile or should I not worry about?

Nothing wrong with a small scoop on an Ea81T Brumby...

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Daza.

The extra wind resistance of a bonnet scoop might be too much for the EA81turbo to compensate tho

The small scoop does look pretty good. What car is it off of? What size intercooler are you running underneath it?

Those scoops actually operate better facing backwards.

That's Dave Martin's Super Brumby,
The scoop is actually cut and streched out of the origanal bonnet!
But it's not feeding an intercooler, just cool air onto the turbo, for now!
Daza.

Brumble wrote:The small scoop does look pretty good. What car is it off of? What size intercooler are you running underneath it?

I've heard a member on here (BaronVonChickenPants?? Or was it Tim_81coupe?) that used a map holder found on the driver's door of any MY subi as a bonnet scoop. If you need one send us a PM with your addy and I'll post one up to you, I've got a few spare now

Cheers

Bennie

That doesn't sound like a bad idea, i've got a spare one here that i'll definitely have a look at. I still haven't decided whether to run an air to air or air to water intercooler. From what i've read on this forum the waic seems to be the better option but they also seem like a lot more work.