I am putting an s5 turbo jdm engine into my s4 turbo car and I want to use my s4 turbo lightweight flywheel and clutch. My question is can I use the rear counter weight off of a NON turbo automatic s5 car with my s4 turbo lightweight flywheel and clutch? I don't want to put it all together and find out the hard way, and I'm concerned that the non-turbo s5 counter weight may be different than the turbo s5 counterweight.

I also wonder what I'll have to do about using my s4 ecu and wiring harness to work with a jdm s5 turbo engine. I know I need to swap over my old front cover with mechanical OMP. I know I need the s4 fuel injectors. But how is a jdm engine going to be equipped emissions wise? I want to remove the emissions control devices to simplify the swap process and maintenance in the future.

thanks

 

You are correct to be concerned. The S5 n/a and S5 turbo use different rotors, and therefor have different counterweights. You will need to find a counterweight off of a S5 turbo automatic.

 

^wrong. Turbo and n/a rotors weigh the same for each series. So any s5 courterweight will work for you.

 

Dammit! When I looked at Mazdatrix site, I was looking at flywheels, and not counterweights!!!

F**K... thanks for the correction, Farberio!

 

okay thanks a lot. I still would like to know the difference between the jdm and usdm motors though.

 

They also never made turbo automatics at least in the US....

 

^ You know that's an interesting point. Why are some people so JDM that they RHD their car and do anything that was done for the JDM version....but no-one is so JDM that they swap in the TII automatic.

Maybe I will do that and out JDM them all!

 

No prob, you are correct about the flywheel though. It needs to match the transmission being used. Along with the clutch, starter, and clutch slave cylinder.

 

I went a head and used the RX7Club official search feature to find a thread for you. Next time, please don't waste my 10seconds.

https://www.rx7club.com/showthread.p...jdm+difference

 

thanks farberio, i definitely appreciate it. can't wait to have it running!