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Guest Message by DevFuse

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transsmision transplat

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4 replies to this topic

#1 Jason.hndrsn


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Posted 23 March 2010 - 06:21 PM

I have a 1982 Brat with a 1.8L and a 4 speed trany. I was wondering if there were any newer power plants with a little more pep and a 5 speed that would fit in its place.

#2 Don_Quixpunch


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Posted 30 March 2010 - 12:10 AM

It's possible to swap in a more recent 5 speed. There are even dual range 5 speeds that'll go. It's not exactly a drop in. It'll bolt right onto the engine, but you'll have to modify either the trans mounts or the trans cross member. And your drive shaft won't fit anymore. I can't remember if the donor car will give you the right size shaft or if you have to have yours modified.

As for the engine, you could step up to a SPFI EA81 or an EJ series engine. Both swaps are rather complex as those newer engines are computer controlled so you need the entire harness from the donor car and integrate it into your cars wiring harness. If you're going that far, you might as well go with an EJ as it's a lot more power than the fuel injected EA81 which isn't that much stronger than your carbed EA81. There are people on the board who really know how to do these swaps. There are also many threads with in depth information on all aspects of what you're asking for.

Another option that you don't seem to be considering is modifying your current engine. The primo setup seems to be EA71 pistons, something like .030" shaved off the heads, a Delta high torque custom grind on your cam, and a Webber 2 barrel carb. From what I've read, the whole package is worth 30 to 40 HP. I've only done the carb myself, felt like I gained 5 to 10 HP, but my old carb was jetted way too high, if you're starting with a healthy carb, the change could be larger or smaller.

I'm still rather new myself. But I've been reading tons and trying to figure out just how far I want to go with my own Brat. I'm happy to answer any questions you might have, but I'm far from the best source of info you'll find here.

#3 MilesFox


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Posted 30 March 2010 - 08:49 AM

an ea82 5spd will bolt in if you ise the flywheel, driveshaft. the ea81 crossmember will mount on the ea82 trans. you will have to fabricate a mount for the carrier bearing.

an ea82 engine will fit. you can modify the disty by flipping the gear and making longer wires to run it in an ea82 engine, and the ea81 carb manifold will fit on an ea82 motor if you eliminate the egr valve.

you can swap in an ea82 carb motor using its intake and disty, just connect everything. the disty may interfere withthe master cylinder, its easier to install the motor fitst, then the disty. you might have to cut off one of the mounting tabs and clock the disty over and set the rotor and move so that the #3 wire is #1. i have swapped several ea82's into ea81's, its mostly a direct swap.

#4 Navybratboy


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Posted 24 January 2015 - 11:30 PM

So would you CLearify I can put my 87 gl ea82 5 speed in to my 83 brat what do I need from the gl? I just want the 5 speed in my brat

#5 sumoco


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Posted 25 January 2015 - 12:19 AM

You don't need a new drive shaft technically. You do however have to get it lengthened, not sure of the exact amount though, a lot of people, myself included like having the one peice drive shaft to bypass the carrier bearing and it's one less u joint to replace later on down the road

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