speed vs. Rpm with zf320 and 3.73

[stilllearning]

Hey, I'm getting ready to swap an s52 into my e30 and am wondering if anyone has an s52 with zf320 tranny and 3.73 rear. I would like to know about what rpm you are have at what speed. Like 5th gear 60 and 80mph. Just wondering b/c I believe for now I will keep the stock rear, but I drive highways a lot and think my rear may be to low.
Thanks

[mazur]

About 4500 at 80 with stock tire size.

[browntown]

plug and chug

http://www.unixnerd.demon.co.uk/revs.html