Rear Suspension

[clarenceboddiger]

I am considering converting my rear suspension to a double wishbone set up as I would like to get away from the trailing arms and have an ideal opportunity as I have a chassis which is rotten anyway at the back end, hence nothing to lose. I have a few questions which hopefully someone may be able to help with:-
1) Why did TVR use this set up on the S when they were already using double wishbones on the wedges.
2) Was the S series the only TVR to use Trailing Arms
3) Has anyone done this already.
4) Can anyone recommend a good book on the subject ie IRS set ups.
Please bear in mind I have access to professional welding services at work and I would be buying the arms, hubs etc as a Kit. The car would probably not be used on public roads.

[trackcar]

Whilst i admire your enthusiasm for changing your car i wonder if you should bother? The s triling arm rear end is great .. i regularly give the double wishbone tvrs a spanking on track in my little S so i'm not sure what benefit you're going to see by going double wishbone. Our race tasmin was the fastest tasmin and that was a trailing arm version not an A frame version. If you want to go ahead for a technical excercise then please do but i'm not convinced you'll see any real gains to justify the work involved. The easiest way would be to chop the rear of a front-damagaed chimaera chasis and weld it to the front end of your chassis.

[clarenceboddiger]

Basically to repair the chassis I have would involve replacing the Arm mountings and the tubes that hold them and also buying 2 arms @ C £200ea, I can buy the conversion for around £200. However you appear to be saying that there would be no benefit from a handling point of view, and that was part of my thinking.From what you are saying it sounds as if its worth sticking with the original, but if thats the case ( and Im not disputing it is) why didnt TVR stick with the trailing arm set up when they built the chim'. Could it have been for mfr purposes perhaps.