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GTS chassis height

adrianreeve - 3/3/05 at 05:30 PM

Gents

I hope you can can help me. I've been watching this list for months, and it seems like someone, somewhere will have an answer for everything!

I've just taken delivery of enough metal to build a chassis. I'm planning a GTS De-dion chassis, but was wondering if anyone had built a book chassis, and then added the GTS rear end? The reason I ask is that the GTS rear end is 25mm taller than the book chassis. Having spoken to Darren, this is to make the car easier to get through SVA on harness mounting heights. Has anyone had problems getting a book chassied car through the test.

Thanks in advance for your help.

Surrey Dave - 3/3/05 at 05:39 PM

yes if the seat belts are mounted at the rear crosstube hieght ,you need very thin low seat squabs to get the SVA measurement.

Or you need to raise the seat belt mounting points ,perhaps with a harness tube across between the rollbar uprights.

adrianreeve - 3/3/05 at 07:14 PM

Thanks very much

Another question - Does anyone know whether if I go for a book height chassis with the de-dion axle, will all the shock mounts and axle mounts still line up and be central. I was thinking that the extra inch comes from extending tubes K1 and K2, which in turn slightly pushes the top rear shock mounts further back. I just worry that if I use GTS trailing arms to mount the rear axle, the shocks will end up sitting at a slight angle when you look at the car side on.

I hope that makes sense!

Cheers

Adrian

ChrisS - 3/3/05 at 09:37 PM

quote:
Originally posted by adrianreeve
Thanks very much

Another question - Does anyone know whether if I go for a book height chassis with the de-dion axle, will all the shock mounts and axle mounts still line up and be central. I was thinking that the extra inch comes from extending tubes K1 and K2, which in turn slightly pushes the top rear shock mounts further back. I just worry that if I use GTS trailing arms to mount the rear axle, the shocks will end up sitting at a slight angle when you look at the car side on.

I hope that makes sense!

Cheers

Adrian

Ive done exactly what you describe, a book chassis with a GTS rear end, and what ive done is mount the shock mounts in a slighlty different position under the square top plate. it means the shock length stays the same but the shock is parallel to its lower mount fromthe side view, and angled in slightly at the topfrom the rear view. Ill try and take a picture for you. The best way to position it is to cut a tube to the shock ride height and fit itto the axle centrally using washers to centralise it, then weld the top bracket in. Ive found it is almost parallel with the rear most edge of the square top plate, and centrally placed between then 2 diagonal tubes running back and down to the GTS rear end. If that all make sense. Like i said ill take a photo for you.

adrianreeve - 3/3/05 at 10:18 PM

That would be great, thanks. Glad I came across this forum!

Cheers

Adrian

ChrisS - 6/3/05 at 11:49 AM

Adrian

Heres the pictures i promised you, hope it makes it a bit clearer.

Rear Upright

Rear Upright 2

Rear Upright 3

http://home.btconnect.com/snellc/snellys/locost.htm

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