Frankenstein Engine

[Neinris]

Originally Posted by speedworxs

the mr2 swap an 2ar fe. and he did a fxe swap too. (much more involved, swap both cams, and timing, ugh)
i would think that staying 2zr, the fxe replace fe pistons would be ok. but when you change the stroke (3zr) that could cause issues, i wouldn't risk.

heres the 2ar fxe swap -
https://www.youtube.com/watch?v=q8t_p_waOEs&t=1427s

I actually follow that guy, and that's exactly why I brought the idea. I had thought of putting a 2AR-FE in my Yaris, but I hate the fact that the exhaust header would be next to the radiator, although I believe that it's feasible, and the subframe already has a channel for the exhaust pipe. I even thought of putting a 2GR, but that's just too much.

Originally Posted by CrankyOldMan

The other issue with the 3ZR-FE is that it's not available in North America as far as I can tell, just the -FAE. That's a totally different head as well--Valvematic instead of VVT-i. I think the only real frankenstein you could do is to use the 3ZR lower end to do a "stroker" kit up to 2.0 from 1.8L. No idea what that would do to compression...

AH! I thought the 3ZR-FE are available in North America, from the 2013 RAV4. I think it's available in South America though?

What makes the 2ZR-FXE have higher compression, is it just the pistons? If so, would it be possible to take a 2ZR-FXE's piston, mate it with the 3ZR-FAE's short block and use a 2ZR-FE's cylinder head? Is it too much work for only some gain?

What about just a 2ZR-FXE reverted to an FE for higher compression application? Supposedly the generally accepted gauge for adding compression is that one full point of compression can add between 3 to 4 percent power, so that's roughly 9-12%, so average 13HP gain.