Boost Junky 1 Report post Posted November 26, 2007 As stated I need a 2.93: 1 Ratio E30 Diff. Swaps or name me a price Cheers, Luke Quote Share this post Link to post Share on other sites
Gus 5 Report post Posted November 26, 2007 thats pretty tall..would go a 3.25 or 3.46...although thinking about it 2.93 prob not too bad Quote Share this post Link to post Share on other sites
Jonty m50e30 0 Report post Posted November 26, 2007 Yeah one to one fifth on that box you have - I would go with the 2.93, 3.25 would haul ass though! Quote Share this post Link to post Share on other sites
Boost Junky 1 Report post Posted November 26, 2007 Yea was just taking into account the cost in fuel at the moment and with the potential for it to continue rising lol.... i guess this is what ya get with a swap like this cant have everything (economy & power) I dont know how to check what I have at the moment I have found various numbers on the diff but how do i tell the ratio? Cheers Quote Share this post Link to post Share on other sites
westy 614 Report post Posted November 26, 2007 A later e36 328 auto runs a 3.07/1 ratio. Should fit the 186 e30 housing. Will need a pro to set it up. Quote Share this post Link to post Share on other sites
Jonty m50e30 0 Report post Posted November 27, 2007 Normally there is a little metal tag that is attached to the rear cover by one of the main bolts, these are normally pretty rusty but will have the ratio stamped on them, the other way is to mark the out put shaft and the diff case then turn the drive shaft and count how many turns of the out put shaft to one turn of the drive shaft - crude but will get you pretty close, its easy to tell the diff from a 4.1 to a 3.46 for instance. Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted November 27, 2007 i have large case e28/e24 lsd 3.07 . small mod to fit into e30 Quote Share this post Link to post Share on other sites
Boost Junky 1 Report post Posted November 27, 2007 How much u want Brent? Would you take something off for a spare diff? Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted November 27, 2007 How much u want Brent? Would you take something off for a spare diffabout $1k , Would you take something off for a spare diff????? what does this mean Quote Share this post Link to post Share on other sites
Boost Junky 1 Report post Posted November 27, 2007 (edited) Well guys now tha I have a 6cyl rev counter in I know the true RPM of the M50, shes doing about 1900rpm at 50km and about 3500rpm at 100km and hour so not as bad as i thought.. $1k hmm thats a pretty good price Brent, what kind of slight modification are we talking about to get the LSD to fit my E30? Cheers, Luke Edited November 27, 2007 by Boost Junky Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted November 28, 2007 Well guys now tha I have a 6cyl rev counter in I know the true RPM of the M50, shes doing about 1900rpm at 50km and about 3500rpm at 100km and hour so not as bad as i thought.. $1k hmm thats a pretty good price Brent, what kind of slight modification are we talking about to get the LSD to fit my E30? Cheers, Luke what kind of slight modification are we talking about to get the LSD to fit my E30? not sure just heard of guys that have done it. once its done you shouldn't have blown diffs anymore , unless you do something real stupid. Quote Share this post Link to post Share on other sites
kiwi535 538 Report post Posted November 28, 2007 Well guys now tha I have a 6cyl rev counter in I know the true RPM of the M50, shes doing about 1900rpm at 50km and about 3500rpm at 100km and hour so not as bad as i thought.. $1k hmm thats a pretty good price Brent, what kind of slight modification are we talking about to get the LSD to fit my E30? Cheers, Luke surely that isnt top gear!!3500 at 100km....thats motorbike material!If you want relaxed cruising you should be looking at about 2000 rpm ! Quote Share this post Link to post Share on other sites
Boost Junky 1 Report post Posted November 28, 2007 Yea man 5th gear. Close ratio box does that.. Quote Share this post Link to post Share on other sites
westy 614 Report post Posted November 28, 2007 Ray has a 3.46:1 e30 lsd on Tme at the moment. Will bring you back to under 3000 @100km/h. Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted November 29, 2007 heres a gearing calculator. i make about 2600rpm at 100km/h with 3.07 diff and in 5th gear in close ratio box with a 1:1 top gear ratio gearing stuff Quote Share this post Link to post Share on other sites
kiwi535 538 Report post Posted November 29, 2007 ahhh that expalins a bit,1;1 is fourth gear in my 5 speed Quote Share this post Link to post Share on other sites
