Printable View
What are my options?
I presume the easiest to get is an M3 one, But what effect would the different diff ratio have and what else needs changing for it to fit? (Difference between M3 & M3 EVO?)
And can anyone confirm if a 318i (M43) gearbox will fit straight onto a 318is (M44) ?
http://www.bmwhaus.ie/forum/showthread.php?tid=1353
http://www.bmw-driver.net/forum/showthread.php?t=78369
A small case would be ideal if you can get one.
M3 diff will work as is (medium case)
Evo will require full rear change. (large case)
Car will be slower due to m3 diffs and lower in the rev range. I have a small case 3.64 in my car and it sits at 3k revs at 60mph and 3.5k revs at 80mph. Acceleration is also improved.
med or large case are easier to find and more resilient than the small case.
Also the gear box should bolt straight on. Lads even run 316i boxes with an IS engine as it's a quicker ratio supposedly.
The 3L M3 ratio 3:15 and 3.2L M3 3:23 will kill acceleration on a 318is (3:45) also the cases are different size. Stick with a small case 3:45 LSD or higher if you can get one :)
Also you will have a very hard time getting a small case here but they, along with a variety of different CWP ratios, are available via ebay and the likes.
I'm sure you don't need me to tell you that you'd have to be careful with what you're buying as it maybe clapped out and need a rebuild.
LSD will transform the car though Ross, 100% recommend. :happy:
That answers that then.... If anyone comes across anything PM me!
Next question, Is a 318i (M43) gearbox the same as a 318is (M44)? The one in my Red Is needs replacing as it jumps out of 3rd at times.
I have a couple of gearboxes for an IS if you're looking for one?Quote:
Originally Posted by BMW
Cheers, But i'v bought a complete 318i engine & box for cheap (Just need to collect it!)Quote:
Originally Posted by Venom
So hoping that box will work. :cool:
Not a bother, ah yeah it will :wink:Quote:
Originally Posted by BMW
In a standard 318is with a 3.45diff ratio first gear should give you 32mph at 6500rpm, In fifth at 60mph it will sit at 2800rpm
With a 3.15(3.0M3) diff fitted, first gear will give you 35mph at 6500rpm, In fifth at 60 it will sit at 2500rpm
All roughly based on 17inch wheels
That doesn't sound too bad I think? Is it actually a noticeable difference when driving normally or only when your driving hard?
If you want an LSD for a small case diff why don't you buy a kaaz 1.5 way I know their pricy but you can keep your current cwp or get cwp from an auto to improve acceleration. I'll be doing Bundy's diff in the new year he's investing in kaaz for his touring. Demon Tweeks sell them 1.5 way will do hoops and nice for a daily driver you can buy 2 way version also
Sent from my GT-I9300 using Tapatalk
Well normal driving it would just mean less effort needed from the car like moving of the line etc
Found this site for gear ratios, Covers most BMWs. :cool:
http://www.endtuning.com/gearratios.html
There's a kaaz available here in an e30 casing might be worth a punt . I'm not sure how much hassle it is changing casings. http://www.e30owners.com/forums/showthread.php?t=23755Quote:
Originally Posted by danlolasdad
kaaz are a great diff
Ive 3,15 in the is. Venom and myself planted it coming from waterford and its been bumper to bumper .no difference as far as I can see
What's a Medium Case 3.73 LSD be out of? (Supposed to be E36)
If it exists it should be hereQuote:
Originally Posted by BMW
http://www.bokchoys.com/differential/GearRatios.htm
Evo diff for sale http://www.driftireland.com/forum/showthread.php?44165-m3-diff