BMW V12 in Boxster S with Tiptronic Help! - 986 Forum - The Community for Porsche Boxster & Cayman Owners

landrovered · 07-30-2010, 05:26 AM

You are going to have a long and painful learning experience here. Mark these words...NO VW PASSAT GEARBOX WILL SURVIVE 700HP

There is a lot of good info in the kit car world about high HP gearbox options. You might be able to use an inverted G50/20 or G50/50 Porsche gearbox but my money says you will need a ricardo transaxle or other racing gearbox and you will not be able to find an automatic you will end up with a six speed sequential unless you want to spend upwards of $25k.

JTP · 07-30-2010, 07:30 AM

This is a cool idea, but you're going to take a great handling chassis that Porsche spent millions on R&D to develop and it is going to be ruined by cutting it in two and stretching it. Weight distribution and handling characteristics will all be severely affected, negatively. It would be a cool show piece when it's done. I wish you luck though.

Topless · 07-30-2010, 08:43 AM

Not clear on the purpose here. Anything can be done with enough time, inspiration and $$$. I assume this is going to be a stripped out race car that barely resembles a Boxster. Why use a Boxster chassis at all? I would think a purpose built tube frame designed around your powerplant would be simpler and a lot better in the long run.

** Porsche DME will be very unfriendly to the BMW motor.
** Boxster tub will be heavy and useless in a purpose built 700hp race car.
** A stretched frame Boxster will have few of the handling qualities of the original car.
** Tip transaxle will not survive your powerplant.

It might be cheaper to just buy a 997 cup car and go racing.

alipendier · 08-01-2010, 08:53 AM

Thanks for all the info

I would still like to know if someone can tell what the max HP the tiptronic can handle, maybe that can clear a whole lot for me... Still

Brucelee · 08-01-2010, 09:06 AM

Arguably the silliest idea that I have yet seen here at the forum.

Tell me: How do you propose to do a "frame stretch" on the Box, since it is unibody?

alipendier · 08-06-2010, 03:51 AM

Silly is what silly does... The frame is already stretched! no proposals necessary here, its better to stick with what you know

http://www.youtube.com/watch?v=A3AViez0lJs

Brucelee · 08-06-2010, 04:39 AM

That was just aweful to watch.

I wouldn't buy a car that had been stretched like that for a buck.

What a waste. Somewhere in Germany, an engineer weeps.

Lobo1186 · 08-06-2010, 05:50 AM

Quote:

Originally Posted by alipendier

Silly is what silly does... The frame is already stretched! no proposals necessary here, its better to stick with what you know

http://www.youtube.com/watch?v=A3AViez0lJs

very interesting. but does that really help in your situation? you would need the engine compartment stretched or at least cut into in order to fit that motor in and or different transaxle. which begs the question why this V12? is it because you have it on you and do not want to buy an engine?

Topless · 08-06-2010, 02:24 PM

Quote:

Originally Posted by alipendier

Silly is what silly does... The frame is already stretched! no proposals necessary here, its better to stick with what you know

http://www.youtube.com/watch?v=A3AViez0lJs

Simply horrifying!

2TrunkSteve · 08-09-2010, 08:06 PM

Quote:

Originally Posted by alipendier

Silly is what silly does... The frame is already stretched! no proposals necessary here, its better to stick with what you know

http://www.youtube.com/watch?v=A3AViez0lJs

That was painful, like being forced to watch an autopsy performed on a beloved family member.

I appreciate your enthusiasm even when I don't understand it. Good luck with your project. Please post photos to the thread as your project moves along!