where can i get a shorter rear diff?
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MBWorld Fanatic!
Joined: Nov 2003
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From: MILFORD,CT
E36M3 race car/Ferrari F355 GTS/1973 Mini 1275GT/Fiat Abarth/ML63/SLK55
where can i get a shorter rear diff?
anyone know?
this will have a (prob big) impact on drag and circuit racing times.
any info will be appreciated.
thanks.
this will have a (prob big) impact on drag and circuit racing times.
any info will be appreciated.
thanks.
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Joined: Feb 2004
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From: San Diego
2002 C32 Black/Charcoal
I know this sounds strange, but I think that a shorter rear end actually might hurt your 1/4 mile times. The reason being that the launch is very difficult with the stock C32. With a shorter diff, 1st gear will be even more useless. Also, stock the car shifts to 4th just before the end of the 1/4 (at about 103 MPH). If you put a shorter diff in, you will just be doing that much more of the 1/4 in 4th gear, which is not a good thing. Not to mention that, IMO, the car already over-revs at reasonable freeway cruising speeds (high 70s, low 80s)
I actually would like about a 10% taller rear gear.
I actually would like about a 10% taller rear gear.
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From: MILFORD,CT
E36M3 race car/Ferrari F355 GTS/1973 Mini 1275GT/Fiat Abarth/ML63/SLK55
found a 3.27 at MKB.
Vomit i think you are wrong.....i will try to dig up the car and driver test of the slk55. it was faster than a c6 vette with 400 hp and lighter weight simply due to the mechanical advantage of lower gearing.
Vomit i think you are wrong.....i will try to dig up the car and driver test of the slk55. it was faster than a c6 vette with 400 hp and lighter weight simply due to the mechanical advantage of lower gearing.
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C32 AMG
Originally Posted by AWDman
found a 3.27 at MKB.
Vomit i think you are wrong.....i will try to dig up the car and driver test of the slk55. it was faster than a c6 vette with 400 hp and lighter weight simply due to the mechanical advantage of lower gearing.
Vomit i think you are wrong.....i will try to dig up the car and driver test of the slk55. it was faster than a c6 vette with 400 hp and lighter weight simply due to the mechanical advantage of lower gearing.
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From: MILFORD,CT
E36M3 race car/Ferrari F355 GTS/1973 Mini 1275GT/Fiat Abarth/ML63/SLK55
Hey Greg. max power for 5.5 na motor is 5750, redline is 6700 which is almost 1000 rpm past peak- power is tapering off rapidly.
i don't think there's a significant gap -I took a look at ratios for the 7 speed vs the 5 speed and calculated the overall gearing and rpm at entry in next higher gear.
7 speed- to redline in 1st, then upshift into 2nd at 4375 rpm -to redline, upshift into 3rd at 4494, into 4th 4782 rpm, into 5th 4893 rpm, 6th 5495, 7th 5950. (last two are overdrives).
5 speed- to redline in 1st then upshift into 2nd 4088 rpm into 2nd, 4310 into 3rd, 4756 into 4th, 5539 into 5th.
granted the slk55 is lighter than the c55 (but c55 has a Cd of 0.27) still the 1/4 goes by a good bit faster (almost 1 sec?) so that's gearing.....(?)
does anyone know the 5.5 na power output past 5700 rpm?
edit- the mkb diff includes a lsd
i don't think there's a significant gap -I took a look at ratios for the 7 speed vs the 5 speed and calculated the overall gearing and rpm at entry in next higher gear.
7 speed- to redline in 1st, then upshift into 2nd at 4375 rpm -to redline, upshift into 3rd at 4494, into 4th 4782 rpm, into 5th 4893 rpm, 6th 5495, 7th 5950. (last two are overdrives).
5 speed- to redline in 1st then upshift into 2nd 4088 rpm into 2nd, 4310 into 3rd, 4756 into 4th, 5539 into 5th.
granted the slk55 is lighter than the c55 (but c55 has a Cd of 0.27) still the 1/4 goes by a good bit faster (almost 1 sec?) so that's gearing.....(?)
does anyone know the 5.5 na power output past 5700 rpm?
edit- the mkb diff includes a lsd
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From: OC
C32
Why spend all that money on shorter gears if it is just for drag racing. Just get some 15 inch rims and mount some low profile drag radials. That will give you lower overall gearing. While your at it spray a 150 shot of nitrous
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MBWorld Fanatic!
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From: San Diego
2002 C32 Black/Charcoal
Originally Posted by AWDman
found a 3.27 at MKB.
Vomit i think you are wrong.....i will try to dig up the car and driver test of the slk55. it was faster than a c6 vette with 400 hp and lighter weight simply due to the mechanical advantage of lower gearing.
Vomit i think you are wrong.....i will try to dig up the car and driver test of the slk55. it was faster than a c6 vette with 400 hp and lighter weight simply due to the mechanical advantage of lower gearing.
I am sure that it depends on track conditions. With a sticky track, lower gears would help. With a slick track (like Carlsbad, where I always ran) the prob was getting out of the hole.
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Thread Starter
MBWorld Fanatic!
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From: MILFORD,CT
E36M3 race car/Ferrari F355 GTS/1973 Mini 1275GT/Fiat Abarth/ML63/SLK55
Originally Posted by Zeppelin
Why spend all that money on shorter gears if it is just for drag racing. Just get some 15 inch rims and mount some low profile drag radials. That will give you lower overall gearing. While your at it spray a 150 shot of nitrous
.......also re gearing....the 7 speed auto c350 is as fast as the 6 speed manual despite the more lossy auto tranny.
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Just a little info so someone doesn't go out and purchase a pair of rims only to get pissed off and yell at there dog later that night.
The smallest diameter rim to fit the C32 is a 16".
Vomit: Carlsbad was a slick track but I always had a lot of fun there!
Too bad they shut it down....
The smallest diameter rim to fit the C32 is a 16".Vomit: Carlsbad was a slick track but I always had a lot of fun there!
Too bad they shut it down....
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Just a little info so someone doesn't go out and purchase a pair of rims only to get pissed off and yell at there dog later that night. The smallest diameter rim to fit the C32 is a 16".
Vomit: Carlsbad was a slick track but I always had a lot of fun there! Too bad they shut it down....
The smallest diameter rim to fit the C32 is a 16".Vomit: Carlsbad was a slick track but I always had a lot of fun there!
Too bad they shut it down....
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Im sorry let me be more clear. 16" will not fit the front of the 32. The smallest you can go is a 17". Also a 15" will not fit the rear of a C32. The smallest you can place on the rear for some drag rubber is a 16"
