[mikek20a]

hi I bought a k20a engine... and want to know witch gearboxes will be compatible for this build..
its just a base line engine for now... please help

 

[Brotatochip]

Basically any of them will bolt up.

 

[mikek20a]

Basically any of them will bolt up.

thanks for the reply.. which one would you recement

 

[Brotatochip]

Depends what it's going in and what you're trying to do.

 

[mikek20a]

Depends what it's going in and what you're trying to do.

building it in a 2005 civic .. nothing crazy... just bolt on turbo for now and few extras..
maby looking at 260 to 300hp

 

[LotusElise]

maby looking at 260 to 300hp

I would recommend a SPNM, RBC3, Y2M3 or NPR3 from the K20A JDM engine, as it has already an OEM LSD, same is valid for the PNN4 or PNN3 of the K20Z3 engine. Otherwise a NPQ3, X2M5 from the K20A2 and swap an aftermarket LSD in.

Would you mind to shift more often or do you prefer a lower FD ratio? I run a 200 ftlb 2-Liter NA engine, which does roughly the same torque as your will put on the clutch, and run a short FD (5.062:1 from FN2/FD2 chassis) in a 740 kg car, which is fine. Other may think it is too short for longer travels noise-wise. Something you may decide what you prefer or you take just what you get with the tranny and be fine with it.

From a member from here at K20a.org