tvr s series v6 to v8 conversion.

[drak ula]

any one know how hard or straight forward it is to fit a v8 motor & box (probably rover but would consider bmw or mercedes if easy enough) to my s2 v6 car? without having looked into it too much, i would have imagined it would be relatively straight forward to fit a rover v8 since the s3 v8 seems on the face of it pretty much the same car! please excuse me if that is ridiculously naive and the s3 v8 has a completely different chassis, but having read that even the griffith has pretty much basically the same chassis as the s series, i would have thought turning an s2 v6 in something more like an s3 v8 should be doable without having to massively modify the chassis etc? any help / advice appreciated, cheers

[philh]

The griffith uses a chassis based on the tuscan racers not the S.

[CTE]

They`re all based on pretty much the same style of chassis, but with progressive alterations/improvements. As far as I know the V8S chassis is slightly wider to accommodate the wider back end of the engine, and there is alledgedly a bit of reinforcing at the rear to cope with all that torque? My S1 has a BOA V6 which puts out at least as much power and torque as a V8S and its fine...maybe one day the back end will fall off? The wishbones are also slightly wider to increase the track by an inch or so and maybe they have got the steering rack in the right position, oh and the rear springs...I think they got it nearly right with the Sagaris! Still love my car though, despite its shortcomings. Modifying and improving it is half the fun.

If you have a bare chassis to play with you can do what you want....i`d definately weld in stainless steel outriggers (just use the correct welding wire and gas and this can be done with a mig set easily enough), and while I am at it build in some bulkhead reinforcement.

[zombeh]

Looking at photos of an s3 chassis (couldn't find a convenient photo of an s2) and comparing it to my v8 the immediately obvious differences are:

Different arrangement of tubes around the diff mount at the back, the mounting bracket is totally different, Is the diff not the same?

different engine mounts and somewhat different layout of the tubes immediately behind them I think the starter motor on the v8 will hit the tube that's there on the v6.

The tubes under the engine are in a different place (pink tubes added to v8s, blue one deleted) I think this is to avoid the sump.
and the one between the front shock mounts bolts in on the v8 I don't think you'll get the engine in and out with the body on with this tube welded in.

The trailing arms and wishbones are wider on the v8 and s4.

I can measure things if you'd like, the engine isn't back in yet.

[dougc]

By the time you've buggered about with the chassis, it might just be easier to sell the V6 and buy a V8?

If you want more power there's always the 24v V6 route....

Edited by dougc on Tuesday 15th June 17:22

[Podie]

dougc said:

By the time you've buggered about with the chassis, it might just be easier to sell the V6 and buy a V8?

If you want more power there's always the 24v V6 route....

Edited by dougc on Tuesday 15th June 17:22

Topic was done to death years ago. Most cost effective route is to sell the V6 and buy a V8S. If you must upgrade, go the 24v V6 route (just make sure you get the right engine!)