Mazda Offset and IRS Question

I know its 5 x 4.5, Im not sure what is in metric, but there are 2.54 cm in an inch, so the conversion would be 5 x 114.3

i should have wrote 5x114.3 up there... sorry... lol... same as 4.5.

you guys think a 40 offset should be ok?

+40 should be more than enough, because of the extra camber. The wheel will tip in at the top, just like the front.

I am doing this as well, soon as I find the rear. I purposely set my frame up to work with an IRS if I ever decided to do one so I wouldnt have to clip my new framework haha.

Originally posted by dragginbagged



Keep i mind there are two different RX7 IRS, one is out of the turbo RX7s and the bolt pattern is 5 x 4.5 like Cris said. But there is also a non turbo rearend that is 4 x 114.5, same as a big Honda bolt pattern. I've had both, so I can speak from hands on experience. Keep in mind that I'm assuming your talking about 2nd gen RX7s, those are what everyone uses. The 1st and 3rd gens are completely different.

geez wayne he said it was an 87 5 lug

Originally posted by Russ-D



+40 should be more than enough, because of the extra camber. The wheel will tip in at the top, just like the front.

I am doing this as well, soon as I find the rear. I purposely set my frame up to work with an IRS if I ever decided to do one so I wouldnt have to clip my new framework haha.

Thank you sir!

Whats the difference between the turbo and non turbo diff's... anything other than the LSD?