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Old 04-30-2003, 12:00 AM   #16
moregothanshow
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it is manual...
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Old 04-30-2003, 03:21 AM   #17
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Where are you. i will buy it and pay ya cash. i sent a email to you just now.. well my emaill are Peterli@becoz.net
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Old 04-30-2003, 08:04 PM   #18
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So wait can someone clear this up...is it better to have a lower number differential, or a higher number differential? i.e. 2.91 or 3.91?
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Old 04-30-2003, 09:03 PM   #19
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depends what you want, if you want acceleration, then a HIGHER number is better, but top speed is sacrificed, and on a LOWER number differential its the other way around, accel is sacrificed but top speed benefits!!
i have it right, RIGHT?!?!
(sometimes i get it confused, but i'm pretty sure on this!)
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Old 04-30-2003, 09:30 PM   #20
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Soldomatic, yes you got it right. I was confusing it too untill I had to look for the diff.

anyway 3.91 is not recomended for any manual BMW. It is just to high. But if you like shifting every second, and brute acelelration and do not drive more than 200km/h on the highway you can get it.

on of the best OEM diff for 3 series is 3.38 from 96- auto m3.

E36 m3 came with:
95 - 5spd (3.15) auto and LTW (3.23)
96-up 5spd (3.23) auto (3.38)


3.91 came out of automatic 325/328

5spd 318i and ti comes with 3.45 diff, so 3.91 would be a perfect diff for 318, but I'm not sure about fitment.

P.S. on automatic 318 3.91 diff will actually decrease your acceleration.
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Old 04-30-2003, 09:32 PM   #21
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Quote:
Originally posted by moregothanshow
it is manual...
Ahh, you have a 3.15 I think. So a 3.91 is too much. 3.38 would be perfect, that comes from the auto M3.
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Old 04-30-2003, 10:10 PM   #22
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yep mkgino, you are right, he has 3.15

318iS, Ti Manual Transmission 3.45
318iS, Ti, Automatic Trans 4.44
325 Manual Transmission 3.15
328 Manual Transmission 2.93
325/328 Automatic Transmission 3.91
M3 3.0 3.15
M3 3.2 , Auto and Lightweight 3.23



mkgino, 3.38 will be perfect for you, but i think it is overpriced.
When I was looking for the diff, cheapest 3.38 we found for 1500 shipped to Canada from Cali.
I got my 3.23 for 900 shipped.
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Old 04-30-2003, 10:19 PM   #23
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Quote:
Originally posted by SickFinga
yep mkgino, you are right, he has 3.15

318iS, Ti Manual Transmission 3.45
318iS, Ti, Automatic Trans 4.44
325 Manual Transmission 3.15
328 Manual Transmission 2.93
325/328 Automatic Transmission 3.91
M3 3.0 3.15
M3 3.2 , Auto and Lightweight 3.23



mkgino, 3.38 will be perfect for you, but i think it is overpriced.
When I was looking for the diff, cheapest 3.38 we found for 1500 shipped to Canada from Cali.
I got my 3.23 for 900 shipped.
I have been looking for the 3.38 also, found one for $800 usd! Guy lives in pittsburg. I want it so bad but I kinda cant trust buying something that expensive without looking for it. I would meet him halfway, but when I do, I wouldnt be able to tell if it is in good condition or not! So I think I may go for the 3.23 soon, because they go for much cheaper than the 3.38
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Old 04-30-2003, 10:27 PM   #24
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If you are play in track. high diff. help you alot for keep the rpm for best Hp.
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Old 05-01-2003, 12:15 AM   #25
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well i woulod like a 4. SOMETHING differential on the side for those days i'm feelin the ned for speed and wanna go to the drag!!
jus tswitch it up and LET IT FLY!!
you could pull some NICE times with that kinda of DIFF, anyone know what a 94 320i had, differential wise that is!?
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Old 05-01-2003, 01:49 AM   #26
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so basically what is the ideal differential for a balanced diet? i.e. not bad for drag or top speed?
oh yeah so is it really shitty that i have a 2.91 differential?
do i have LSD (not the drug)?
Thanks!
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Old 05-01-2003, 02:42 AM   #27
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Quote:
Originally posted by SickFinga
When I was looking for the diff, cheapest 3.38 we found for 1500 shipped to Canada from Cali.
I got my 3.23 for 900 shipped.
Hey is that a used one? New? Rebuilt? and Where? $900cdn?
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Old 05-01-2003, 02:54 AM   #28
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Quote:
Originally posted by SOLDOMATIC 325i
well i woulod like a 4. SOMETHING differential on the side for those days i'm feelin the ned for speed and wanna go to the drag!!
jus tswitch it up and LET IT FLY!!
you could pull some NICE times with that kinda of DIFF, anyone know what a 94 320i had, differential wise that is!?

with 4.44 diff you will hit rev limiter in 5th gear before you will finish 1/4mile
so it is a not good idea.


For you 3.38 is the way to go, but it is too expensive, so look for 3.23 diff.


to count by how much your rpms will increase at certain speed do this.

divide the old rpm by the old ratio and multiply by the new ratio to get the new rpm.
ie.
lets say in 5th gear at 4000rpms you fo 120km/h
4000rpm / 2.91 * 3.38 = 4646
so with the new diff you will be traveling 120km/h at 4646 rpms.

let's try changing 2.91 to 4.44
4000/2.91 * 4.44 = 6103rpms
so you will be almost redlining at 120km/h
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Old 05-01-2003, 02:55 AM   #29
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Quote:
Originally posted by WASABI
Hey is that a used one? New? Rebuilt? and Where? $900cdn?
it was used, I got it from jpropane(max member)
Usic took it apart, said it was in perfect condition.
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Old 05-01-2003, 03:00 AM   #30
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Quote:
Originally posted by SickFinga
it was used, I got it from jpropane(max member)
Usic took it apart, said it was in perfect condition.
I thought he was selling a 3.15 LSD Diff ? Not bad!
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