EA82 power

[Subytim]

If one wanted to stay with the carby EA82 as in my case the motor has only done 180 000, would it be possible to rig up a low boost supercharger for one? surely it would gain decent power and torque increases if it was done properly? maybe improve economy on the highway by needing less revs to do 100-110?

 

[Ratbag]

Gidday Tim

There are a lot of pros and cons to fitting superchargers to smaller engines, and it can get quite complex quite quickly.

The SC should be electrically activated clutch controlled to avoid running with constant boost.

Gearing and cooling systems will probably need to be modified as well, and you may need to fit an oil cooler.

You will need a cogged drive pulley and belt to avoid slippage. A SC draws around 5-10 HP, depending on boost, so the gains will be marginal in some engines.

As a guide, a 7 psi boost will give you an increase of about 50% for both power and torque, and increase the stress on engine (etc) to about 225% (1.5^2x100).

 

[AndrewT]

Interesting idea, I'd love to see it done. However I don't think it's a good idea. These old EA82s are a terrible basis for any kind of performance. Even the factory turbo versions that are actually designed for forced induction are unimpressive. Very old technology motors. You'd have to spend quite a bit on R&D and messing around to get a decent increase in power, and possibly ruin your engine trying to get it reliable. Just look at their figures even from when they were new...

EA82 carby engine - 84bhp
EA82 multipoint injected engine - 97bhp
EA82 turbo engine - 115bhp

...my Hyundai Getz work vehicle - 105bhp

You could always chuck in an old EJ22 and get about 140bhp before even thinking about a supercharger. Also, people have already put superchargers on these with some level of success and documented it.

 

[Subytim]

Yeah granted it is old tech but there is a lot of new tech out there that can probably be used on old tech motors

 

[Davidov]

Its possible but much harder than EFI engines because with the carby set up you need to set the supercharger up to suck through the carby not blow. And then you would maybe get a reliable 20kw net gain if your lucky.

Honestly I think the time effort and money would be better spent on an ej22-25 conversion. Much more reliable, literally doubling your power and just better In every single way.

 

[El_Freddo]

surely it would gain decent power and torque increases if it was done properly?

Or you'll just be changing head gaskets more often, followed shortly by your rings.

maybe improve economy on the highway by needing less revs to do 100-110?

Supercharger or not you'll still be pulling the same revs at cruise. The only way to change these is to mess around with your gearbox and tyres. Then it starts to get crazy (and good if you hit the mark!).
Your economy at cruise will depend on how you hook up the SC with the electronic clutch, provided it has one. If you're boosting at cruise you can forget economy!

Also, a ribbed belt is not needed. A mate of mine successfully ran an EJ22 with an SC14 'yota SC with a flat belt without issues.

Another thing, once you've got the supercharger worked out you'll probably want to look into induction cooling - another complexity in the mix. I'd also be looking at going EFI which means either after market or the EA82 EFI heads, inlet, wiring and computer. I'd be looking at the turbo EFI setup as it will be able to handle the boost off the bat where as the stock NA MPFI gear will need to be pioneered/checked thoroughly to avoid detonation, a boosted engine's nemesis.

Or EJ it. So much easier. Then you can supercharge it

Cheers

Bennie