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E36 M3 (1995-1999)

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  #1  
Old 04-12-2012, 01:04 AM
95 ///M3 95 ///M3 is offline
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thinking bout new diff maybe a 338?

so the time has finally come to where I can put a little more money into my car..
I've always wanted a bit more torque and am starting to realize a new diff would be probably be my best bet. I have an OBD1 so I'm thinking a 223 or maybe even 338 or higher??

what I'm really asking is for some feedback of those who have done this swap.
some pros and cons (obviously higher gear so MPG will be taking a fall...) looking for more specific stuff.

anything helps
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  #2  
Old 04-12-2012, 11:24 AM
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petriej petriej is offline
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Mein Auto: '99 M3 Cab & '05 X5 4.8is
I'm not 100% sure on what I have in mine but I think it is a 3.23.

Check out this spreadsheet. Bimmerfest won't let me attach xls files so I renamed it to pdf.


RENAME THIS FILE BACK TO XLS TO USE IT.
Attached Files
File Type: pdf GearingCalculator.pdf (73.5 KB, 113 views)
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Quote:
Originally Posted by hornhospital View Post
Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
2005 X5 4.8is Le Mans/Black/6spd Steptragic
1999 M3 Cabrio TiAg Metallic/Dove Grey/Black 5 Speed Manual
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1997 328iC Schwarz II/K/K 5MT SOLD 5/2012
2004 645Ci Mineral Silver Metallic/Black 6MT RIP 04/2011
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  #3  
Old 04-13-2012, 11:26 AM
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ECSTuning ECSTuning is offline
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HERE is a listing of all the available gear ratios for a few different models including the E36 M3. I'm running a 3.38 in my 5 speed M, it's a riot to drive everywhere except the highway where it winds out pretty high in order to maintain speed.
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  #4  
Old 04-13-2012, 11:30 AM
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That's the thing. I'm cruising at 70ish at 3000rpms with a 3.23. A 338 would be even more revs. Great for autox etc. but not for road trips or autobahn type jaunts
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Quote:
Originally Posted by hornhospital View Post
Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
2005 X5 4.8is Le Mans/Black/6spd Steptragic
1999 M3 Cabrio TiAg Metallic/Dove Grey/Black 5 Speed Manual
-------------------------------------------------------------------
1997 328iC Schwarz II/K/K 5MT SOLD 5/2012
2004 645Ci Mineral Silver Metallic/Black 6MT RIP 04/2011
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  #5  
Old 04-13-2012, 11:34 AM
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ECSTuning ECSTuning is offline
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Exactly. While my daily was down for repairs I drove the M for a while. She was a little on the thirsty side when running down the interstate, but then again I was having so much fun driving her instead of the boat that I didn't mind.
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  #6  
Old 04-16-2012, 12:48 AM
95 ///M3 95 ///M3 is offline
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Hey guys thanks for the quick responses!

and I tried to take a look at that spread sheet but it wouldn't download properly =/

I'm in hard situation here... HAHA

I drive about 70 miles on the M a day. Mostly HWY driving with about 15 miles of nice city driving.... I usually put it in cruz control at 75mph on the freeway and wait for the twisties to come up towards the end of the drive right before the exit to home . So I drive both city and freeway alot..

since you have 338 in yours already could you give me an idea of where your RPM's fall at on the freeway and in different gears etc??
also is it an OBD1 or 2? because I know considering the difference of engine there would be a difference.

thanks guys!!
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  #7  
Old 04-16-2012, 09:25 AM
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S50 powered OBD1. The M has been in storage for a few months, but last time I drover her into work rpms sat rather close to 4 grand on the interstate (limit is 65 around here, I usually only run 5 or so over the limit).
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  #8  
Old 04-16-2012, 10:13 AM
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petriej petriej is offline
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Mein Auto: '99 M3 Cab & '05 X5 4.8is
http://www.diffsonline.com/techinfo/...Calculator.xls

There's the direct link.
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Quote:
Originally Posted by hornhospital View Post
Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
2005 X5 4.8is Le Mans/Black/6spd Steptragic
1999 M3 Cabrio TiAg Metallic/Dove Grey/Black 5 Speed Manual
-------------------------------------------------------------------
1997 328iC Schwarz II/K/K 5MT SOLD 5/2012
2004 645Ci Mineral Silver Metallic/Black 6MT RIP 04/2011
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  #9  
Old 04-16-2012, 12:46 PM
95 ///M3 95 ///M3 is offline
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that spread sheet is soooooooo helpful thank you!
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(current) - Alpine White 95 M3 TMS tuned
(Sold) - E30 Dinan coup
(R.I.P ) - 95 TMS tuned M3
(Sold) - 92 Dinan 325i E36
(Sold) - 87 stock 325e e30
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  #10  
Old 04-16-2012, 12:55 PM
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petriej petriej is offline
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Yea, man. Sorry I couldn't attach it to the thread like I wanted before. Combine that spreadsheet with the info on Bokchoys that the ECS rep linked and you can see what swapping out from other E36s will do.
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Quote:
Originally Posted by hornhospital View Post
Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
2005 X5 4.8is Le Mans/Black/6spd Steptragic
1999 M3 Cabrio TiAg Metallic/Dove Grey/Black 5 Speed Manual
-------------------------------------------------------------------
1997 328iC Schwarz II/K/K 5MT SOLD 5/2012
2004 645Ci Mineral Silver Metallic/Black 6MT RIP 04/2011
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  #11  
Old 04-17-2012, 12:45 AM
95 ///M3 95 ///M3 is offline
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Location: Ashland OR
 
Join Date: Mar 2009
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Mein Auto: 95 Black ///M3 Coupe
hummm been doing some more research bout the diff swap.

is it really worth the 500$ (diff) from swapping a 3.15-3.38
-am I really going to notice much of a torque/power difference?

after seeing the spread sheet my concerns as far as rpm with the 3.38 are really minute ..
maybe I should consider going higher.
__________________

(current) - Alpine White 95 M3 TMS tuned
(Sold) - E30 Dinan coup
(R.I.P ) - 95 TMS tuned M3
(Sold) - 92 Dinan 325i E36
(Sold) - 87 stock 325e e30
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  #12  
Old 04-17-2012, 05:37 AM
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Pinecone Pinecone is offline
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240 poounds-feet x 4.20 (1st gear) x 3.15 (final drive) = 3174 pounds feet delivered to rear wheels

240 poounds-feet x 4.20 (1st gear) x 3.38 (final drive) = 3407

(3407 - 3175)/3175 = 7.3% increase

A 7.3% increase in torque delivered means a 7.3% increase in acceleration.
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  #13  
Old 04-17-2012, 10:04 AM
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petriej petriej is offline
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Quote:
Originally Posted by 95 ///M3 View Post
hummm been doing some more research bout the diff swap.

is it really worth the 500$ (diff) from swapping a 3.15-3.38
-am I really going to notice much of a torque/power difference?

after seeing the spread sheet my concerns as far as rpm with the 3.38 are really minute ..
maybe I should consider going higher.
Get a 4.11!
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Quote:
Originally Posted by hornhospital View Post
Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
2005 X5 4.8is Le Mans/Black/6spd Steptragic
1999 M3 Cabrio TiAg Metallic/Dove Grey/Black 5 Speed Manual
-------------------------------------------------------------------
1997 328iC Schwarz II/K/K 5MT SOLD 5/2012
2004 645Ci Mineral Silver Metallic/Black 6MT RIP 04/2011
Reply With Quote
  #14  
Old 04-17-2012, 10:32 AM
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ECSTuning ECSTuning is offline
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Quote:
Originally Posted by petriej View Post
Get a 4.11!
or a 4.44 from the 318 auto then rebuild for LSD I'd do it if I had enough free time.
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  #15  
Old 04-17-2012, 10:33 AM
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petriej petriej is offline
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__________________

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Quote:
Originally Posted by hornhospital View Post
Jared, why don't you just put "It's Giubo" in your sig? Save a lot of typing.
Quote:
Originally Posted by e36 miguel View Post
this jared guy sounds intimidating lol.
2005 X5 4.8is Le Mans/Black/6spd Steptragic
1999 M3 Cabrio TiAg Metallic/Dove Grey/Black 5 Speed Manual
-------------------------------------------------------------------
1997 328iC Schwarz II/K/K 5MT SOLD 5/2012
2004 645Ci Mineral Silver Metallic/Black 6MT RIP 04/2011
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