Alright I don't see why it wouldn't work. But will my existing harness work? because I really don't feel like switching that much at the moment. Figured I can get the head from the wrecker get it cleaned up and such and then shove it on my car, probably need a fuel pump also and I know I would have to put in new fuel lines but that shit doesn't bother me.
I was also thinking I could just put the 4age internals in my car with the engine still in it... leaving out the efi and putting my carb on there. bUt would the carb put enough fuel in for the 4age? and I figure my intake wouldn't just hook up but I could probably get or fab up an adapter plate.
Or are both to much of a pain to do as a temp power solution?
know what won't won't work? everything I suggested should work? except the carb thing, not sure with that
From what I have been told and have read the stroke on a 4age and on a 4af are the same so the blocks aren't different. and the injecters are all in the head, correct? so a fe head should work on my 4a engine block with the internals I have
well I want to do that. But I am having issues with my carb so I figure just go efi, as long as I find an ecu and wire harness alot of the shit should be the same
well it's come up in here a few times with the ge head swap on the 4af engine and it's always been "yes you can do it but the power gain won't be there.
Well... Few things to consider, valve reliefs are different shaped because the valve angle is quite different between the F and G head, the piston compression height might be different.
If I'm not mistaken the compression will be shit high with GE pistons in a FE, because part of the chamber is actually built into the piston in a 4A-FE. Also it will be quite low with the FE pistons in the GE head. Plus using the Aisan carb with that, considering its a piece of shit carb to begin with.
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Or are both to much of a pain to do as a temp power solution?
YEah, I wouldnt waste my time and money experimenting with this, if you dont want to take the block out of the car, thats no biggie, just get the 4A-GE internals (oh and the connecting rods and crank have to be from the older non-7rib 4A-GE, because thats got the same crank size if I remember correctly). and stash them in the block, and tadaa, you have a 7rib 4A-GE, sorta. Then get the GE head on it. Dunno about the wiring harness, carbed cars dont have the EFI wiring you need in there, so... you gotta figure out how to pull the sensor wires, plus you need the sensors.
Really its a lot of trouble for so little gains. Carb turbo would be cheaper and you'd have similar gains with mild boost.
Putting GE internals on a FE is like putting old worn out tires on a brand new mercedes, it will work, but they'll still be shit.
Oh and using old used pistons in a block is always a questionable thing. The pistons wear to shape a bit in a cylinder, this might result in bad sealing, pistonslap etc. I'd suggest getting new pistons and having the block overbored to the next size, then you'd basically have a new 4A-GE when you get the pistons and head to it.
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4af to the fe head? or 4age internals in a 4af?
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