e30 325i with 3.91 diff

[fannyj]

Hi Guys

I have a 3.91 diff in the garage and have been contemplating fitting it this weekend. My car is stock standard and drive about 100km to work and back. Would this diff cause the revs to run ridiculously high while cruising on the highway? Currently at about 120kph in 5th, i'm doing round 3000+/- rpm

[Ziggy]

They won't be ridiculously high, but they will be higher (assuming you've got a 3.64 at the mo? Can't be bothered to work it out from your figs!). I've got a 3.91 in mine (& they were standard on the facelift 325i sports) & it's fine, but you'll probably notice the extra fuel you'll be using... Can't say I'd really recommend it if you spend a lot of time at high speeds!

[cliffybabe]

ive og t a 3:91 dif on my cab and im well pleased with it

[snoops]

id say keep the 3.64 on there if you do cruising at high speeds but if its acceleration your after then fit it

[Ziggy]

ive og t a 3:91 dif on my cab and im well pleased with it

So am I!

But if I had a 60 mile drive to work on the motorway every day, I'd stick a 3.64 back on...

[cliffybabe]

ive og t a 3:91 dif on my cab and im well pleased with it

So am I!

But if I had a 60 mile drive to work on the motorway every day, I'd stick a 3.64 back on...

thank god mine only a weekend car

[GDBN]

Weekend car - which you spend in the boot ...

[Ziggy]

Weekend car - which you spend in the boot ...

[fannyj]

thanks for the replies guys..guess i will be sticking to the 3.64.

[spence_star]

whats the difference in ratios with an open diff?

[fannyj]

thanks for the replies guys..guess i will be sticking to the 3.64.

[Ziggy]

whats the difference in ratios with an open diff?

Don't understand the question really... You can get most of the same ratios in open & LSD form, if that's what you mean?

[spence_star]

ok, because i got an open diff, and all i know is it dont save you if you lose the back end. i am not sure what ratio i am running.

[cliffybabe]

Weekend car - which you spend in the boot ...

very good

It keeps tent costs down

[GDBN]

You should install a coffee machine in the boot so next time you can have a coffee while waiting for help.

[Ziggy]

ok, because i got an open diff, and all i know is it dont save you if you lose the back end. i am not sure what ratio i am running.

Ok... well nor will a LSD, but anyway... what's the question?

If you want to know what diff you've got, have a look at the tab on it, or at least tell us what car you've got!

[Ziggy]

You should install a coffee machine in the boot so next time you can have a coffee while waiting for help.

Ah, so there is some point to all the cr@p they fit on Pimp My Ride - you should apply Cliffy!

[cliffybabe]

You should install a coffee machine in the boot so next time you can have a coffee while waiting for help.

Ah, so there is some point to all the cr@p they fit on Pimp My Ride - you should apply Cliffy!

y all they'd do is fit chrome archs and some brown interior im alreayd half way there