who has what diff?

[surebimmer]

S52, ZF, 3.25 LSD. Its good.

[RVA e30]

Supercharged S50, ZF, 2.93 LSD. I do a lot of highway driving so I love it.

When I had my 3.73 it was an absolute blast around town but I was not a fan of it on the highway.

[94is]

OBD1 M52, E36 ZF, 3.25LSD. I'll let you guys know what I think once I get her driving this weekend. :D

[vr4boy]

90m3 w/ s52 obd1 swap(soon to be supercharged),e36 zf tranny,3.25lsd...kinda like it but, do a lot of highway driving-maybe go 2.93 lsd or i'll try my luck w/ a euro 6 speed......

[So Live]

M50 + e46 ZF + 3.73lsd

Annoying on highway and anything over 50mph. Its a blast around town though.

Planning on picking up a 2.93s or a 3.15s after a few hp adders.

[MR 325]

Anyone running a 3.91 diff with a 260 E30 tranny?

[asubimmer]

getrag 240 w/ a 3.73lsd

[JPStrniste]

what's the formula for figuring rev's for say, 70 mph? (based on gear ratio?)


the e36 getrag's have a 1:1 ratio in 5th gear, right?
and the e30 getrag's have a .81:1?

[windsor318is]

2.93 lsd for me, with s52 and zf

[94is]

90m3 w/ s52 obd1 swap(soon to be supercharged),e36 zf tranny,3.25lsd...kinda like it but, do a lot of highway driving-maybe go 2.93 lsd or i'll try my luck w/ a euro 6 speed......

What does it turn at say 80mph?

[Mike B.]

what's the formula for figuring rev's for say, 70 mph? (based on gear ratio?)


the e36 getrag's have a 1:1 ratio in 5th gear, right?
and the e30 getrag's have a .81:1?

Here is a nice calculator for calculating rev's - http://www.diffsonline.com/techinfo/...Calculator.xls

[cheades]

S50 + 260 + 3.23LSD. I guess it is a bit tall, but works great for both driving around and track as it saves a few shifts.

[gobuffs]

Not that it really matters as mine is strictly a track car...

Euro 3.2 with M coupe tranny (same as M3 5 speed)...either a 4.10 or a 3.73 (depending on the track). might look into a 6 speed and a 4.27 or a 4.45.

[1990m3]

Not that it really matters as mine is strictly a track car...

Euro 3.2 with M coupe tranny (same as M3 5 speed)...either a 4.10 or a 3.73 (depending on the track). might look into a 6 speed and a 4.27 or a 4.45.

I drove a '95 m3 last year at Road America with an e46 6-speed and 4.10, that was a lot of work. It was very quick and a lot of fun, but a lot more shifting than I'm used too. It also had a US spec 3.0l worth around 300hp at the crank. One of the fastest cars out there that day, mostly because it is very well driven. I personally think 4.27 or even 4.45 would be a little overkill, if you're on a short technical track you'll be shifting constantly.

It was fun though

[gobuffs]

I drove a '95 m3 last year at Road America with an e46 6-speed and 4.10, that was a lot of work. It was very quick and a lot of fun, but a lot more shifting than I'm used too. It also had a US spec 3.0l worth around 300hp at the crank. One of the fastest cars out there that day, mostly because it is very well driven. I personally think 4.27 or even 4.45 would be a little overkill, if you're on a short technical track you'll be shifting constantly.

It was fun though

Road America is a fast track. I would put in the 3.73 with the 5 speed.

Euro motor has another 600-1000 revs to work with than a US motor. Makes a big difference. I wouldn't use a 4.27 or a 4.45 with a 5 speed. The 5 speed with a 3.73/4.10 vs a 6 speed with a 4.27/4.45 is similar to the E30 M3 OD vs CR gear box. 2-6 on the 6 speed are closer spaced than 1-5 (5 speed and 6 speed has same first 5 gear ratios).