Converting car from EA82 to EA82T

[stickedy]

I have a "problem":

Here in Germany we have a very high car tax for cars without catalyst (some green ideology - without any words). Since I have an EA82 with carburetor I pay a tax of 350 Euro/year. Now I have the possibilty to get a car with an EA82T with regulated catalyst (this catalyst was installed afterwards) for which I would only pay 130 Euro. So I would save 220 Euro a year. Much money for me!

 

So I now have the question how simple is the conversion from EA82 to EA82T?

 

I have read that the axles are different or better have more Splines. This is bad since I have some new axles for EA82 and the EA82T ones are bad. So I don't like the idea of changing the axles.

Would it be possible to use the old EA82 transmission and axles with the EA82T engine? Or is the EA82 transmission + axles too weak for EA82T? And if so, would it be poossible to use just the old wheel side of the axles (the part after the ball beraing) and combine it with the EA82T part of the axle?

 

Has anyone an idea about my problem? And have you some additional remarks for the conversion?

 

Thanks a lot!!

 

Stefan

[xoomer]

Ok, I'm new to all this stuff myself...

 

BUT.

 

I'm pretty sure the Trans and Axles are the same. I believe that the only difference is The exhaust stuff. and the Crossmember? but what do I know.

 

But why not just fix the the turbo car... and sell your old one?

 

xoomer

[stickedy]

Hmm, the turbo car is not in a very good condition as far as I know (rust, needed repairs - axles, brakes and so on).

 

And it doesn't have a sun roof - this is important in the summer without air condition

 

BTW: What should be the difference on the cossmember?

[Hank Roberts]

Keep looking -- there IS a difference in the transmission, the turbo doesn't drop straight into the non-turbo drive train. There is a fairly simple fix, I think something like you need to change axles, don't trust me on this though. It's here somewhere.

 

You say you need turbo -- are you sure of that? Could it be all you need is to replace the carb with fuel injection? You can have fuel injection without the turbo. You said you pay more for a carbeurated engine, which is why I'm asking.

[stickedy]

Yes, I would only need the fuel injection together with the catalyst, but wouldn't this simple change lead to trouble with the ECU?

 

My engine does only have some 90 hp, the turbo one some 120 hp. So is the only difference between EA82 and EA82 the turbo charger and the engine itself + ECU is identical?

I don't know any EA82 with ECU and I think they weren't sold here in Germany, only with carburetor, so I don't have any information about the ECU controlled engines.

 

So, the main question: Could I use the EA82T ECU with an EA82 engine?

 

I think the installation of the fuel injection system would be fairly simple and quicker than the change of the whole engine, transmission and so on and I like this idea much better. Thanks for this hint!

[Snowman]

Drivetrain compatabiity: Yes, the EA82T axles are different, but you can bolt the EA82T engine directly to your EA82 transmission and it will hold up fine. The only differences between the transmissions were the final drive gear ratios and the spline count on the stub axles.

 

Exhaust: You will have to cut a notch in either the engine or transmission crossmember...others will know which one, I just know that it's one of them. Other than that, use the EA82T exhaust from the downpipe forward and you'll be fine.

 

Electrical: It's really not that hard to install the wiring harness and ECM from the EA82T car and make it run. However, if you've got a strict vehicle inspection program over there, you will have to spend a lot of time making sure that everything looks good (as in not just piling the ECM and harness in the spare tire area like I did). You will need a good manual, preferably a factory manual, for the donor car and your car so you can sort out all the wires.

[4WDFrenzy]

If you don't like the body on the EA82T car, then just swap the motor, wiring, and ecu. This will probably be the easiest way to get the best of both worlds.

 

First, the tranny. The EA82T engine will bolt up to your current transmission as Snowman said. So this means you don't have to swap out your cv axles, hubs, etc. The bolt pattern on the engine should be identical to that of your transmission.

 

Secondly, the the crossmembers and exhaust. I can't remember which one would have to be swapped out either, but I would swap in both he crossmembers from the EA82T just to be on the safe side. This will allow the stock EA82T exhaust to fit without clearance issues. I think the exhaust hangers in the rear are in the same places so there shouldn't be any issues with the exhaust bolting up. Just remember that if it still has the stock cat, it needs to be bolted up to the side of the transmission. There may or may not be a threaded hole for it to attach to.

 

Finally, the ecu and wiring. It shouldn't be difficult at all to install the EA82T wiring harness and ecu. I believe that the ecu should still be able to bolt up underneath the dash. Just mark the plugs and sensors with a paint pen or permanent marker so that you know which plug correlates to which sensor. This should be relatively easy to do when you have the engine out. I'd say you can probably have it all swapped and running in 3 days or so if you have access to an engine hoist and the necessary tools.

 

I hope this helps.

 

Patrick

[PoorManzImpreza]

ok to convert from carb to a ea82 turbo you need:

 

Engine crossmember from turbo car, the crossmember has a concave indentation that allows clearance fot the turbo up exhaust pipe

Engine

Downpipe, will bolt to carb exhaust at the first flange with the springs

Fuel pump and wires

ECU

ECU and engine wiring harness, which is integrated with front wire harness, which plugs into ecu and dash and body harnesses, so basically you need the entire dash/engine harness to make it easy, else you need to extract the engine to ecu harness from the front harness and the dash harness.

Air flow sensor

fuel pump and ignition relays, mounted next to ECU under steering column

Fuel tank, EFI fuel tank has build in surge tank, but u might be able to get away with using your carbed tank

fuel filter and fuel lines.. (carbed fuel line could be used as well)

 

probably missed a few items..

 

if you want to convert your carbed motor to EFI and leave the turbo out

you need:

the above, but only the heads and intake complete from the turbo engine, a method of sealing the oil and coolant lines that goto the turbo must be devised

you'd need to mount an o2 bung to your carbed exhaust..

 

which brings me to a good point, even in Barbados where our old school subarus didn't even have evap emissions control, egr etc the car had a cat. so I'm a bit confused that germany's carbed vehicles didn't..I've seen the euro s[ec parts book and the exhaust looks the same as ours...Oh and By the way euro spec turbo cars had 140hp and a factory oil cooler..

forgive any typos..

but if the one cat isn't enough, why not just add the cat from the turbo car?

[stickedy]

My car and the ones sold here in Germany have an uncontrolled cat (named U-Kat in Germany) without ECU. Even the the EA82T with ECU just have an uncontrolled cat. And the taxation of an uncontrolled cat is basically the same as without any cat

But this EA82T car has an later installed controlled cat with oxygen sensor (named G-Kat) with Euro2 norm. So this isn't a stock car, but a modified one. And for an G-Kat you need an ECU, without ECU no G-Kat and therefore high taxes. So I have to modify my car and install the ECU + corresponding systems.

 

So far, many thanks for all your help!! It helps me very much!!

 

I'm currently thinking which of the two options will be better: changing the whole engine or just the fuel injection system.

Another important point is that the tax of the turbo charged engine will be the same because the taxation depends on the capacity of the engine and not on the power! Another illogical and crazy point of the german taxation system...

 

So, has anyone an idea about the gasoline consumption of the EA82T compared to EA82?

 

I think I will go with swapping the whole engine. I have the service manuals with all eletrical wiring and so on for EA82 and EA82T.

 

@Snowman

Do you know what the difference in the final gear ratios is?

 

Thanks a lot @all one more time!

 

greetings

 

Stefan

[Snowman]

The EA82T cars generally had 3.7:1 final drives while the EA82 cars with manual transmissions had 3.9:1 final drives. Cars with automatic transmissions had 3.7:1 regardless of which engine was used. There are some exceptions to these specifications, and it may be different where you live. This is how it is for most cars in the US.

 

You can't put just the fuel injection system from the EA82T onto the carbureted EA82. The EA82T has dual-port heads while the EA82 has single ports, so the manifolds do not swap. Subaru did sell cars with a non-turbo single point fuel injection system, which can be swapped onto the carbureted engines without a lot of work.

 

As far as fuel consumption, it varies depending on how you drive the car. The turbo cars can get about the same fuel economy as the carbureted ones if you drive conservatively. If you do a lot of high speed driving or hard acceleration, the turbo engine will consume a lot more fuel.