Modifying a CSL

[crazy of cookham]

Any ideas what could be done to a CSL in upgrade performance. Sorry not a daft question I know someone who seriously wants to do it. Already derestricted by BMW. Can you squeeze further HP out, or are they already at limit. If so who could you use. Assume work will invalidate warranty. Can you purchase independent insurance backed waranties.
Tks

[m12_nathan]

Brakes (AP) and suspension (intrax, ohlins or moton) first.

After that has been done speak to Tony R from bm3w.co.uk who will be offering a range of engine options from 420bhp NA running Motec (so no more SMG, have to convert to a manual box) to supercharged 500+bhp. Warrenty will be out the window though.

personally I'd leave the engine alone and go for a lower geared diff (again Tony can help), limit top speed to about 170ish but get better acceleration all the way there and keep SMG. 170mph is plenty for all circuits I can think of.

[944tom]

crazy of cookham said:

Any ideas what could be done to a CSL in upgrade performance. Sorry not a daft question I know someone who seriously wants to do it. Already derestricted by BMW. Can you squeeze further HP out, or are they already at limit. If so who could you use. Assume work will invalidate warranty. Can you purchase independent insurance backed waranties. Tks

Is his name Paul M by any chance?

If it is he asked me also, if not I also have a friend who is interested!!!!

Tom of Taplow

[crazy of cookham]

I do believe the world is smaller than we think. Thats probably a yes.

[doctorD]

There are real gains to be achieved via the exhaust, by replacing the Cats with 100 cell items (from SS or Miltek). The standard car comes with 200 cell cats. There's probably around 10bhp to be gained from the exhaust. Otherwise Kelleners in germany have built a 3.4 litre car with a claimed 400bhp+ and it's certainly possible to produce more than 400bhp from these engines, but that's in race trim.

p.s. there are also a few supercharged examples around with around 550bhp. Do a search on 'Loaded CSL' on Google or BM3W.

[phatgixer]

Remove induction flap.

Fit KW v3 suspension and lower car 25mm and corner weight.

Fit adjustable camber plates and give front -3 deg

Fit rear wheels on front axle

Fit AP 6 piston front and 4 piston rear with GP5000pro disks and pagid RS19 or 29 yellows

Fit full supersprint exhaust with 100 cell cats and single pipe centre section.

Fit stiffer rear trailing arm bushes

Have ECU vmax delimited

Fit decent recaros

Enjoy a very fast road / trackday car.

[crazy of cookham]

Thanks for the advice. Now I can convince him to get the work done and have some fun with the car.

[944Tom]

Crazy

I'll let you tell him then!

Tom