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Old 08-10-2013, 08:37 PM   #21
indoafro
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Daves Minimal Build/Progress thread

cool story...i really want to have lsd on my coupe..how was the rear subframe instalation ? could you tell us more detail story about that ?


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Old 08-10-2013, 08:50 PM   #22
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Cool story bro. I would never break any road rules, or endanger mine of any others life's like that.


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ha! your cooking alone endangers life
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Old 08-10-2013, 10:03 PM   #23
Davew
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Daves Minimal Build/Progress thread

Don't know if it is possible with the m3 diff you have, but if you could change your ratio down to 3.38 running your 19 wheels, you should get much better 0-100. At the moment I would guess you have to change twice to get there, diff ratio change would mean only one gear change, quicker time.

http://www.bokchoys.com/differential...calculator.htm


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Old 08-10-2013, 11:37 PM   #24
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Thanks Dave, not a bad calculator. I have been thinking about changing diff ratios. Just gotta find one


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Old 08-10-2013, 11:40 PM   #25
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Don't know if it is possible with the m3 diff you have, but if you could change your ratio down to 3.38 running your 19 wheels, you should get much better 0-100. At the moment I would guess you have to change twice to get there, diff ratio change would mean only one gear change, quicker time.

http://www.bokchoys.com/differential...calculator.htm


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Where would he find a 3.38 for the M3 diff?
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Old 08-11-2013, 12:28 AM   #26
Davew
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Daves Minimal Build/Progress thread

Like I said, no idea if it was possible? Custom cut gears depending on carrier size??? No idea. I am stuck with my ratio because of my tranny, never looked into this myself.


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Old 08-11-2013, 12:31 AM   #27
Davew
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Daves Minimal Build/Progress thread

I work for an engineering company, the gear cutters we use for all our gear cutting are excellent and very helpfull. I can pass on there contacts if you like, but I have no idea of the size of the carrier in the m3 diff and if this is possible???


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Old 08-11-2013, 02:12 AM   #28
Davew
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Daves Minimal Build/Progress thread

http://www.turnermotorsport.com/p-20...m-options.aspx

Turner have options that you could look into, maybe they have a gearset on the shelf???

They have the option of 3.23 or 3.45 on there custom M3 diffs.


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Old 08-11-2013, 02:19 AM   #29
Davew
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Daves Minimal Build/Progress thread

3.23 would look good, to 100 with one change, good cruising rpm at 100. Calculator is pretty accurate for clutched drive.

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Old 08-11-2013, 02:32 AM   #30
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Daves Minimal Build/Progress thread

Please don't think I am being a smart *ss here, my job during the week is basically to solve engineering problems/ dilemmas. Just trying to be helpfull. My knowledge of m3's is limited, I have never had the chance to play with one, and most of my experience is with the 330 and 325.


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Old 08-11-2013, 03:02 AM   #31
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Nah, not questioning the possibility (of course) just the cost of such a change to a weekend car for Dave.. Dave.
lol
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Old 08-11-2013, 03:50 AM   #32
Davconelectric
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Quote:
Originally Posted by Davew View Post
http://www.turnermotorsport.com/p-20...m-options.aspx

Turner have options that you could look into, maybe they have a gearset on the shelf???

They have the option of 3.23 or 3.45 on there custom M3 diffs.


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Here's the issue, been thinking about it whilst driving home. How many standing start launches do I really do? I mean most of my driving is between 40 and 110kmph. Is it even worth changing ratios and spending a few grand on new gears that realistically would only be for 0-100kmph drags?


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Old 08-11-2013, 04:06 AM   #33
Davew
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Daves Minimal Build/Progress thread

Launch in second perhaps???? See how that goes.....


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Old 08-11-2013, 04:08 AM   #34
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Doesn't add enough to the smile "factor" but if you want "that" you wouldn't hold back...
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Old 08-11-2013, 04:10 AM   #35
Davew
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Daves Minimal Build/Progress thread

If you had a rooted M3 crown and pinion, could always machine some blanks and then have them gear cut and heat treated. This option may see you come under a grand easily.


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Old 08-11-2013, 04:10 AM   #36
E46 Coupe
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Launch in second perhaps???? See how that goes.....


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Daily drive? No.. Purpose built car? Wrong base..
Davcon.. I'll trade my tubular frame 1/4mile chassic for the 330
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Old 08-11-2013, 04:11 AM   #37
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Woops quoted wrong Dave hahaha
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Old 08-11-2013, 04:17 AM   #38
Davew
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Daves Minimal Build/Progress thread

Does anyone out there have a set of m and non m crown and pinions that they would allow to be measured up?


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Old 08-11-2013, 04:50 AM   #39
Davconelectric
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cool story...i really want to have lsd on my coupe..how was the rear subframe instalation ? could you tell us more detail story about that ?


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I believe Brendan_select is selling a LSD for a standard diff if your interested. My car was a 6 speed manual so everything including tail shaft bolted straight in. If you have an auto or 5 speed you'd need to get a custom length tail shaft made up. It was really quite an easy straight forward job.


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Old 08-11-2013, 07:19 AM   #40
Davew
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Daves Minimal Build/Progress thread

http://item.mobileweb.ebay.com/viewi...d=111047287375

Do it Dave, it's only $500 bucks. You know you will end up doing it eventually!!! Do it now!

You will save this on tyres alone!!!


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