EA81 & EA81 Turbo engine info

jimmyet46 · Post by **jimmyet46** » Sat Jul 29, 2006 6:54 pm

Hi all

I am just wandering want the difference is between the EA81 & EA81 Turbo engine's

I know the heads are different and they are fuel injection
I would guess the pistons are different

what i need to know is it easy to convert a non turbo engine to a turbo one as they are hard to find.

I would be using a aftermarket ecu and custom exhaust manifold

This is a idea for a project car in the future.

Thanks
Jimmy

stinky · Post by **stinky** » Sat Jul 29, 2006 7:30 pm

It would be doable, but I think a EJ conversion would be no more tricky/expensive and would give much better results.

jimmyet46 · Post by **jimmyet46** » Sat Jul 29, 2006 8:00 pm

stinky wrote:It would be doable, but I think a EJ conversion would be no more tricky/expensive and would give much better results.

Thanks for your relpy

I really don't want to mod the chassis to fit it in.

All i am after is info on the the two engines if i have to pull down the one i have i might as well make it a turbo injection instead of just a carby engine.

I will go the subaru and look at the parts books for info.

thanks
Jimmy

MY_STI · Post by **MY_STI** » Sat Jul 29, 2006 9:05 pm

I would have to agree with stinky,

I have an ea81t and given the choice again, would go EJ.

Dont have to mod the rails for ej sohc
The fuel system is going require and overhaul and some wiring will have to be done regardless of which engine you use.
ej will require an adaptor plate or an ej gearbox
81t manifold is also very different.

Have also adapted SPFI onto an ea81, was a good project, but really not worth the effort.

According to the local subaru sevice department, the engine 'doesn't exsist', found some engine sevice data on the net that included the turbo, forget where I found it but can send it though.

Full credit for wanting rid of the carb

MUDRAT · Post by **MUDRAT** » Sat Jul 29, 2006 9:12 pm

I gotta say the NA EJ engine is really the way to go as far as that sort of thing goes.

jimmyet46 · Post by **jimmyet46** » Sun Jul 30, 2006 12:39 am

MY_STI wrote:I would have to agree with stinky,

I have an ea81t and given the choice again, would go EJ.

Don't have to mod the rails for ej sohc
The fuel system is going require and overhaul and some wiring will have to be done regardless of which engine you use.
ej will require an adapter plate or an ej gearbox
81t manifold is also very different.

Have also adapted SPFI onto an ea81, was a good project, but really not worth the effort.

According to the local Subaru service department, the engine 'doesn't exsist', found some engine sevice data on the net that included the turbo, forget where I found it but can send it though.

Full credit for wanting rid of the carb

Thanks for your reply

So you telling me the ej Will bolt straight in without any chassis mods & still able to take the rocker cover off easy. this a 83 GLF Leone coupe

The fuel side is easy external injection pump with external surge tank.

A aftermarket ecu with it's own engine harness.
Custom intake & exhaust manifold.
The gearbox will bolt straight up as it will be the same.

I believe the ea81 Turbo engine only made for overseas market USA ect..

The main question i really need to know is are the engine internals like conrods different?
I would think the pistons are
i know the heads are

i seem to be getting negative views here except for getting rid of the carby.

thanks for all your help

Jimmy

redskin · Post by **redskin** » Sun Jul 30, 2006 8:46 am

[quote="jimmyet46"]Hi all

I am just wandering want the difference is between the EA81 & EA81 Turbo engine's

I know the heads are different and they are fuel injection
I would guess the pistons are different

Pistons are different,
Camshaft,
Engine cases,
Not sure about conrods or crank but would not be surprised,
Distributor,
& and apart from the alternator & starter just about everything else that hangs on the outside.

steve_rising_sun · Post by **steve_rising_sun** » Sun Jul 30, 2006 10:05 am

Even if you fit EA82t pistons you will still have pinging issues with your old donk. The heads/cam are the key. You will love the EJ22 in your MY. We make adapture kits with plate, flywheel and bolts for $495.
Steve

jimmyet46 · Post by **jimmyet46** » Mon Jul 31, 2006 12:20 am

Steve_rising_sun wrote:Even if you fit EA82t pistons you will still have pinging issues with your old donk. The heads/cam are the key. You will love the EJ22 in your MY. We make adapter kits with plate, flywheel and bolts for $495.
Steve

thanks
Steve

So you are saying that EA82t pistons will fit a ea81 engine?
I know that ea81t heads will bolt on so that should lower the comp & give me fuel injection using a aftermarket ecu i should be able tune it without pinging issues.

I don't want to use a EJ22-25 or any other conversion.

thanks
Jimmy

jimmyet46 · Post by **jimmyet46** » Mon Jul 31, 2006 12:28 am

jimmyet46 wrote:Hi all

I am just wandering want the difference is between the EA81 & EA81 Turbo engine's

I know the heads are different and they are fuel injection
I would guess the pistons are different

what i need to know is it easy to convert a non turbo engine to a turbo one as they are hard to find.

I would be using a aftermarket ecu and custom exhaust manifold

This is a idea for a project car in the future.

Thanks
Jimmy

Hi all
thanks for all your input i am getting info that i am not really asking for
I don't want to do a conversion's with other engines from different models.

All i want to do is turn a carby ea81 into a ea81 turbo i just need to know the difference between the two engines.

I am not concerned about intake or exhaust manifolds as they will be custom ones.

The ecu will be a aftermarket one.

The radiator will bigger one.

PS:please read the full thread as i am answering the same input over again

Thanks again

MY_STI · Post by **MY_STI** » Mon Jul 31, 2006 8:46 am

Just trying to save you some trouble, for similar power an EJ will be much more reliable and efficient.

Maybe if you let us know why you are determined to go the ea way, we might understand.

Using the standard radiator in average condition, my 81t ran cooler the most of my mates '81's ,though towing heavy loads up hills required twin thermos to keep her on half temp, no intercooler probably didn't help here.

Apparently the JDM 1600's eat aus 1800's for lunch, might be a better starting point?
Recommend using a VF2 off an 82t instead of the VF (1) from the 81t. Unless you have something radical planned.
If you are getting an aftermarket ecu, get rid of the dizzy entirely (yes I like dizzys about as much as carbs)
An awd gearbox might also be on the cards.

steptoe · Post by **steptoe** » Mon Jul 31, 2006 12:49 pm

you need to modify the engine cross member to take the turbo crossover pipe or find a MY turbo cross member.

the front top side of the rhs needs a big deep dish to allow pipe to curl up to turbo

after all your efforts, if you are to run it on the roads your registration body will want to know and likely to demand an inspection of an intense nature. if nsw it'll be blue slip and likely to require disc brake rear

engineer report !

insurance co. ask them b4 doing anything

you can probably turbo any motor but the reliability and drivability will always be questionable depending on your camshaft grind, fuel quality, supply system, comp ratio
EA82T crossover pipes fit EA81. you need to make mods to supply and return water and oil to turbo. oil should come from oil press switch position,and drain back to rocker cover connector would be easiest in my obs
water tap off that metal pipe coming out of back of thermstat housing to heater

steve_rising_sun · Post by **steve_rising_sun** » Mon Jul 31, 2006 8:20 pm

You must have the turbo or twin carbie cam to suit the heads. I know what the end result drives like, you should listen to the guys and go EJ.
Steve

MY_STI · Post by **MY_STI** » Mon Jul 31, 2006 9:50 pm

Slightly off topic question, but I have read somewhere that ea81t heads are configured like the dual port head, with the intake 'on the inside' however mine definatly have the inlets on the outside like normal ea's.

Whats the go? is there two different types of turbo heads?

jimmyet46 · Post by **jimmyet46** » Tue Aug 01, 2006 12:38 am

Hi all

Thanks for all you help i have decided to give the whole turbo idea away as i am getting no where with the info i have ask for all i get is do it this way use this engine.

So i have decided to keep the car as a daily driver and get another car for the a project i am looking at a Nissan.

PS: the reason for trying to do what i wanted to do is to be different.These motors were turboed and came out in a in leone coupe's car overseas from what i was told.

He is the picture of the subaru

so again thanks for all your help.

Jimmy

steptoe · Post by **steptoe** » Tue Aug 01, 2006 10:57 pm

there might just be some wisdom in what you have decided.

you really need to ask a lot of questions as you get thinking on this sort of project and can't expect all the answers to come out immediately either

jimmyet46 · Post by **jimmyet46** » Tue Aug 01, 2006 11:14 pm

jono wrote:there might just be some wisdom in what you have decided.

you really need to ask a lot of questions as you get thinking on this sort of project and can't expect all the answers to come out immediately either

Hi Jono

Thanks for your reply

As for the wisdom i just wanted to be different in what i wanted to do but everything seems to be against me so i decided to go the other option.

As for the question i thought i ask the right one it was quite simple.

You have a non turbo ea81 engine and you wanted to make it turbo ea81 as they did make one quite straight forward i thought.

It does seem to me that people only read the last post instead of reading the whole post.

Any way i have decided on a Nissan for the project is a shame as a turbocharged 83 limited edition Leone coupe would have been a great project.

thanks everyone for all help and comments

Jimmy

steptoe · Post by **steptoe** » Wed Aug 02, 2006 12:54 pm

We may have missed your originality point a bit. What's wrong with you quietly fitting a turbo cross over pipe and turbo and hook up your own carby suck or blow thru set up. I think we all read you as asking differences between factory set ups . When you done that then tell us what u encounter and go from there, but then the advice has come from those who have tried before

good luck with your Nissan project

steptoe · Post by **steptoe** » Wed Aug 02, 2006 12:59 pm

there was a guy I talked to years ago who owned a beetle with twin turbo, twin carb EA81. Claimed to do a Rex at the lights, but couldn't corner for crap

that is the originality stuff you were seeking to try ?

redskin · Post by **redskin** » Wed Aug 02, 2006 1:54 pm

Jimmy, have sent you a pm.
Pete.