Right then, I bought a Gibbs, Haynes Roadster chassis, earlier this year.
It came complete with, all the wishbones, a Sierra LSD rearend, and front hub carriers.
My intention has always been to use a BMW 328i engine and box.
So my question is, how big of a job would it be to swap from the Sierra parts to the BMW parts?
I was thinking it would make things easier as I should be able to retain the BMW donor's reg number.
None of the car assemble it's all still in boxes.

Cheers Frank

[Edited on 7/8/10 by fha772]

You won't retain the BMW Reg number but will get a new Reg from the same year as the donor.
The hubs back and front will have different mounting points and the diff mountings will be Erm different, you may need to shorten the drive shafts.
I would look at selling the rear carriersand wishbones and have a new set made, perhaps GKD have off the shelf parts as they do a BMW based 7

Alternatively, keep it all Sierra based, and just use the beamer engine and box.

That'll get you a Q-plate however (if that matters to you?)

The Gkd stuff doesn't use book geometry or parts, it's based on a ginetta g27r or g20 geometry so I'm pretty sure they won't fit. Using the BMW diff would be a good idea as they're cheaper than the ford stuff and designed to take more power through them.

It's not too important, i was just curious really.

The original plan was to just use the engine and box, after i've used the 328i for the PPC £999 Challenge, on September 17th.
By the 22nd, i'll have BMW bits on the bay!!

a few people over on the haines forum have done BMW, and I think Chris' next book is to include this so it should be relatively straightforward to modify if you're competent with a welder...

As above, though, probably better to sell the sierra-based bones and stuff and start from scratch on wishbones rather than modify the existing ones.

I think this question is probably best asked over on the roadster forum...

[Edited on 7/8/10 by stevebubs]

May be worth having a chat with MK..they're producing a BMW-based car..

http://www.mkengineering.co.uk/mkbeamr.htm