Is there a bolt in 5 speed option?
Has anyone actually installed the 1400 4 port heads onto a EA71 or EA81? It does not look like I can use 2 port heads due to the crossmember location. It will physically clear, but would most likely need to run under the crossmember, which I do not wish to do. Would look pretty cheesy with the pipes hanging low, IMO.
Who is a good source for performance machine work and parts such as cams/pistons? I will want to get as much RELIABLE/DRIVEABLE power out of this as I can. What is a good # to shoot for? Is 100 @ the crank acheiveable? I would envision a pretty much balanced/blueprinted bottom end with some sort of bigger cam, maybe upped compression if feasible, some nice port work on the heads, maybe with bigger valves, a custom exhaust header/system, and maybe a single Mikuni sidedraft on a custom manifold. (just something a little different than your run of the mill 32/36 ) I would obviously like to start with the most displacement I can, but it seem from searching the EA81 won't accept the 4 port heads, so I am probably "stuck" with an EA71. Thanks for the replies so far and keep them coming!
Yes, there is a 5-speed FWD option!!! There were a few 5-speed FWD transmissions from 75 on I believe, in specific models though. They even had some with the EA81's. Its basically the same "case" but they added the 5th gear in the rear housing outside of the main case.
Yes, people have fit the 4-port EA63 heads to an EA71 shortblock. Here is a photo of one for example, owned by another member here:
When dissected, it was discovered that while this motor was bad (due to water) it DID have upgraded valves AND pistons to go along with the apparently upgrade springs and the custom head work to fit the dual barrel carbs on each side:
However, most of the work done on that engine was apparently done a LONG time ago, so sourcing those parts will be next to impossible now...
For reference, my goal with my FF-1 is to run some 1400 4-port heads with the EA71 shortblock for reliablity PLUS the aftermarket Weber manifold I lucked out and found for sale in Japan and now own:
I haven't decided how much other work I'll do with the setup, but I will have the cam reground probably by Delta-cam and have the heads ported at the very least (along with a shortblock rebuilt, unless I find an already re-built block for sale, but it will probably have to be a junkyard block that i'll have to rebuild).
If you do decide to go that route too, maybe we should combine our efforts and have the work done at the same place at the same time? LOL!
HOWEVER, you have quite a few other options too...
An EA81 with a corresponding 5-speed transmission would be an upgrade. PLUS you can do whatever you want with the internals and maybe run a dual-carb setup (the dual-carb setups were on the "sport" models in Japan and elsewhere, not sold in the US):
You also have the option to go with a TURBO EA81 if you can find one:
(not sure if that is an EA81 or EA82, but you get the idea)
There have also been a few odd-ball setups that i've seen over the years that might peak your interest...