Ive got a line on a core motor for my brat. Its an ea81t minus the turbo and F.I. stuff. After some resurch here I now know that it is lower compression. Is this a property of the heads or the shape of the pistons? What other differences does this motor have from the n/a ea81. Can I still use it as a core or should I have said no?

I missed out, Chris Lantieri was giving one away a few months ago

I want to build a motor for my brat with out removing my current running motor.

-Sam

As far as I know they are the same block with a different cam and dished pistons. I am not sure if the combustion chambers are really different cc's wise but they may be a little bit different.

So as far as what i am looking to do this motor may not be useable, maybe this is the time to find a turbo... I had a couple chevy 6.5's but I still know little about turbos.

what kind of turbo will I be looking for?

Different cam, pistons, heads, and entire intake/turbo ect. The block is the same as any other hydro lifter EA81 block.

 

Mounting the turbo in it's stock config would require the turbo engine cross-member, all the wireing, the ECU, intake, turbo, and all the exhaust bits. Also have to convert the existing fuel system to high pressure for the fuel injection.

 

Or you could do a carbed turbo and make it all custom - but that's never been done that I know of, and would require a lot of old-school turbo knowledge that few people have now.

 

GD

I see alot of carb'd turbo sandrails out there but the moral of this story is that this motor may be useless to me.

-Sam

I am sure there are plenty of guys and gals on here that would trade you a decent ea81 na motor for your ea81t motor if you choose.

I dont have the motor yet, and Im not going to get it if I cannot use it, if anyone in Vegas area can use it and would like to swap let me know.

Kinda a bummer cause the damn junkyard wants $270 for a core. And this one would have been free.

-Sam

So my unit doesnt have hydro lifters?

1982 brat

Thanks

-Sam

So my unit doesnt have hydro lifters?

1982 brat

Thanks

-Sam

 

No. Hydro lifters came on 83/84 automatics, and all 85+ EA81's. All others were solid lifter and require adjustment every 15,000 miles.

 

In addition, pre-83 engines also had smaller intake valves so the heads don't flow as well.

 

GD

So my ideal builder is a 83+ auto, or 85+ any... Why did the 83+84 only have hydro's in the auto trans model?

Thanks for all the info

-Sam

You could use that block just fine, as long as you replaced the pistons with N/A pistons.

 

I think the EA82's have the same stroke and bore as the EA81, so it maybe possible to use EA82 pistons as well.

 

The heads are different, and the pistons are different. The intake manifold is also different.

 

If you get the motor and want to get rid of the heads, let me know. I have been looking for a set of (uncracked!!) heads for a long time. If you were closer, i would have a EA81 for you... got one in the garage unused and could use a fresh build. However, Sacramento is alittle far to go to just trade motors.

 

-Brian

So my ideal builder is a 83+ auto, or 85+ any... Why did the 83+84 only have hydro's in the auto trans model?

Thanks for all the info

-Sam

 

No one really knows the answer to that.

 

Depends on what you want - if you want raw N/A power then you want a solid lifter, big intake valve engine - 83/84 manual tranny model. Less drag on the valve train with solid lifters. If you want easy maintenance and quieter valve train noise then you want the hydro's.

 

In reality either one is fine and the power difference is pretty much negligible between the lifter types. With a Delta cam, EA82 SPFI pistons (9.5:1) and a port and polish you can pull 100 HP out of the EA81 pretty easily using either a Weber or the EA82 SPFI.

 

GD

Reliable long lasting and economic is my goal.

-Sam

Well that could be ANY EA81 LOL

 

The solid lifter and hydraulic lifter motors are no different in terms of reliability and economy. I think you'll be happy with any rebuilt EA81.

 

-Brian

ive seen an pic off an turbo carb ea81 rx leone

My buddy was wrong

It was a rubber band motor...

The search continues.

Thank you guys

-Sam