MyE28.com DEV

How different are the b34 and b35 cams?

Good & Tight wrote: Gear change for sure then, I think you should try the 3.73.
How tall are your tires?

I have a 410 enroute. 26" tall tire. 7000rpm rev limit.

Scottinva wrote:How different are the b34 and b35 cams?

500rpm onset of fat tq.

it should be violent with a 4.10
good luck
marc

Gear ratio comparison

293

mph/rpm

47/6800
82/6800
117/6200

410

mph/rpm

34/7000
58/6800
92/6800
117/6200

The thing I loved about running 4.10 gears in my M30-powered E34 Touring was that when you were commuting, it drove normally and got roughly the same fuel economy because you were pretty much always 1 gear higher than normal. And when you wanted to come out of the hole hard, BAM. Even my NA B35 moved that 3700 lb beast around in an entertaining way with those gears.

Of course the disadvantage was that I was gear-limited to a top speed of about 120 mph (didn't want to run it to 6k in 5th for fear of the rocker arms).

Mr Project wrote:The thing I loved about running 4.10 gears in my M30-powered E34 Touring was that when you were commuting, it drove normally and got roughly the same fuel economy because you were pretty much always 1 gear higher than normal. And when you wanted to come out of the hole hard, BAM. Even my NA B35 moved that 3700 lb beast around in an entertaining way with those gears.

Of course the disadvantage was that I was gear-limited to a top speed of about 120 mph (didn't want to run it to 6k in 5th for fear of the rocker arms).

Hmm, and here I am running a 3.23 in the touring with the M30. I should have left the 4.10 in there.

Ah well the 3.23 will be better with the turbo anyway.

if using a getrag 260/6 or getrag 265,a 3.73 final drive is a good match for drag racing.2.93final drive is a mismatch for drag though nice for top speed run.