Changes to wishbone pick up points?
Changes to wishbone pick up points?
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The AJP Griff

Original Poster:

4,360 posts

285 months

Monday 9th March 2009
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Just read a nice little article in Sprint magazine about Sportmotives outriggers and newly built chassis.It's mentioned in the article that the chassis has the latest TVR spec wishbone pick up points,and i was wondering just how they had changed?Was it a revision to improve the integrity of these points,or was it also done to alter the afects of the suspension?Anybody know?

Colin RedGriff

2,541 posts

287 months

Monday 9th March 2009
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Not sure but didn't the earlier ones have a two piece wishbone at the front? Maybe the pickup points changed when the wishbone changed?

spend

12,581 posts

281 months

Monday 9th March 2009
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Not that, all with 2 piece wishbones should be upgraded to one-piece as the chassis mounts are identical IMHO. They are interchangeable, but I don't think you'll find anyone even selling the 2 piece anymore?

GreenV8S

31,018 posts

314 months

Monday 9th March 2009
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Didn't the early Chimaeras have a different different suspension geometry to the Griffiths? We know the later ones were identical but I seem to remember reading that the early ones weren't.

spend

12,581 posts

281 months

Monday 9th March 2009
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AFIK, all the running gear to chassis points are the same, only changes are to diff mounting (GKN x 2 versions, BTR), rails round gear box (T5 linkage), just that removable top member for serp swirl tank.

I have all later running gear bits bolted on my early chassis Pete. There may be some of the very early Griffs that were a bit different. SH says things like rear ARB, rollbar pickups were added much later - but they were all there on my 93 chassis. Pretty sure TVR just built chassis in batches - and then decided which body was to sit on them IYSWIM.

I had always assumed that minor changes across the different factory geo settings were simply down to the different dampers and wheel/tyre combinations that were fitted.

TVR_owner

3,349 posts

221 months

Tuesday 10th March 2009
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Were there not some changes in 1996 to pick-up points that resulted in the later cars improved handling?

The AJP Griff

Original Poster:

4,360 posts

285 months

Tuesday 10th March 2009
quotequote all
TVR_owner said:
Were there not some changes in 1996 to pick-up points that resulted in the later cars improved handling?
Interesting comment.Can anyone else shed any more light on this?

900T-R

20,406 posts

287 months

Tuesday 10th March 2009
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I read the original comment in that the new chassis would now have the 'Sagaris' wishbone geometry - AFAIK everything from the Griff up to the Saggy (the extra length in the Cerbera excluded) basically had the same geometry.

spend

12,581 posts

281 months

Tuesday 10th March 2009
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So are you of the impression that we could put other TVR wishbones & uprights on our cars? I thought Cerbs & T-series were different pick up points?

900T-R

20,406 posts

287 months

Tuesday 10th March 2009
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Not sure - from what I read, evo has always been under the impression that all of the model-to-model changes bar the Cerbera were steering rack/geometry and spring/damper rates... but what do they know. wink

Post-'96 (or post-whatever for that matter) Griffmaera wishbones are fully backwards compatible with the earlier cars, the latest iteration superceding all prior versions though - I'd be rather surprised if they managed that while changing the pick-up points for the '96 chassis; to complicate matters further all 500s already had that chassis, anyway.


spend

12,581 posts

281 months

Tuesday 10th March 2009
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Not all TVR's use 10ton ford uprights & hubs wink...been a moot point for ages, I once contemplated making wishbones to use later alloy running gear - but SH was supposed to be producing alloy replacements. Must admit was a bit surprised Iain didn't change uprights when he made his wishbones..

Sorry Mike ~ is this where you're coming from BTW? or looking to cram something else into the chassis hehe

900T-R

20,406 posts

287 months

Tuesday 10th March 2009
quotequote all
spend said:
Not all TVR's use 10ton ford uprights & hubs wink
Ah yes, of course... boxedin ... dimensionally though, it seems that only the Cerb (which was made on the same front and rear jigs as Griffmaeras, anyway) and Saggy are the odd ones out. Personally I wouldn't be entirely surprised of one could bolt later 'corner modules' (wishbones with everything in between them to earlier chassis with little in the way of modifications to either.

The AJP Griff

Original Poster:

4,360 posts

285 months

Tuesday 10th March 2009
quotequote all
900T-R said:
spend said:
Not all TVR's use 10ton ford uprights & hubs wink
Ah yes, of course... boxedin ... dimensionally though, it seems that only the Cerb (which was made on the same front and rear jigs as Griffmaeras, anyway) and Saggy are the odd ones out. Personally I wouldn't be entirely surprised of one could bolt later 'corner modules' (wishbones with everything in between them to earlier chassis with little in the way of modifications to either.
The front of the cerb chassis is very different to a griff one,so surely werent made on the same jig?Or was it the same jig with added bits?
Dave,i'm interested in whats changed so that i can identify whats on my car.I had always thought that the griff never changed,but remember hearing something about a rear end change on early Chims i think? I thought the only changes to griffs were shocks,springs and the addition of the rear ARB?

900T-R

20,406 posts

287 months

Tuesday 10th March 2009
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The '500' chassis that became standard across the range in 1996 had some extra stiffening (as per the Bible).

The AJP Griff

Original Poster:

4,360 posts

285 months

Tuesday 10th March 2009
quotequote all
900T-R said:
The '500' chassis that became standard across the range in 1996 had some extra stiffening (as per the Bible).
Well dont keep me in suspense! hehe where was this extra stiffening then?

900T-R

20,406 posts

287 months

Tuesday 10th March 2009
quotequote all
The AJP Griff said:
900T-R said:
The '500' chassis that became standard across the range in 1996 had some extra stiffening (as per the Bible).
Well dont keep me in suspense! hehe where was this extra stiffening then?
I vaguely remember I've looked at the pics before to see if I could spot any difference...I'll let you know if I ever find it. I'm about as useful as a fish on a bike on this stuff... laugh


spend

12,581 posts

281 months

Tuesday 10th March 2009
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Its only the diff change that refers to stiffening AFIK?

I suspect not all GKN's had our early 'floating' side bushes, but got them shouldered in like the late arrangement. As I said earlier a lot of early cars had the rear ARB ~ they're only tigged on dont know of any change to chassis?

HRG

72,863 posts

269 months

Tuesday 10th March 2009
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Weren't the earlier Chims a fractionally narrower wheel track?

spend

12,581 posts

281 months

Tuesday 10th March 2009
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I think those possible 'myths' have come from the slightly different wheels & offsets used Rob.

HRG

72,863 posts

269 months

Tuesday 10th March 2009
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Possibly, can't remember where I read it now. Thinking about it that would make sense yes