[BMWCSRegistry] An ADDITIONAL esoteric question for theCognisenti

[David Dart]

Good enough for me Richard,

I have the option of 3.07 or 3.64 LSD to go with either one. I can sort of
feel a project coming on! Currently running the 5 speed O/D with 3.64 -
great combo - was running with the 3.07 but too hard to get off the line and
a bit sluggish.

Appreciate your advice. 

David.


-----Original Message-----
From: Richard Conway [mailto:richardconway at bellsouth.net] 
Sent: Wednesday, July 18, 2007 11:27 AM
To: David Dart; knowtree at aloha.com; 'Art Wegweiser'; E9 BMW Coupe list
Subject: Re: [BMWCSRegistry] An ADDITIONAL esoteric question for
theCognisenti


David and all:

For decades, I ran 450 twin turbo horsepower in my CSL through both a CR 5
speed and an OD 5 speed tranny before the M5 was introduced and well before
M5 parts were available. Nary a problem after 100,000 very fun road and
track miles.

F.Y.I.  With the turbo, the OD was the only answer however, with M5 power,
I'd stay with the CR unless you do a lot of highway miles, then I'd go with
a lower ratio diff and the OD. Of course if I would have had M5 driveline
parts available at the time, I would probably have gone that route, but they
weren't and I didn't and had no problems and lots of fun. One reoccurring
problem though.  The guibo self-destructed every 20,000 miles or so.

Richard Conway



On 7/17/07 2:04 AM, "David Dart" <davidd at nevicdgp.org.au> wrote:

> 
> Forgive this question as it is not specifically Coupe related in the 
> true sense.
> 
> I know there are some on the register with M5s. I have the chance to 
> buy a
> M5 engine which I am thinking of doing for my 635. The question is 
> will the existing gearbox take the power?
> I know the M5 had a larger 5 speed overdrive box than I have at the 
> moment in 635 but will the existing box take it. I also have a 5 speed 
> close ratio dog leg gearbox if that would be better - although I have 
> heard they are not as strong as we would like.
> 
> If it helps digest this question I still have my CS. (phew!)
> 
> Any comments welcome.
> 
> David.
> 
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