stronger front wishbones?
stronger front wishbones?
Author
Discussion

jesfirth

Original Poster:

1,743 posts

271 months

Sunday 21st February 2016
quotequote all
does anyone know where I can buy the stronger round front wishbones for my griff 500 - I assume they are the same as the chimera ones?. I have bent one of the standard ones kerb hopping on a track with 700 lb springs )-: also posted this on the griff forum

carsy

3,019 posts

194 months

portzi

2,336 posts

204 months

Sunday 21st February 2016
quotequote all
carsy said:
http://www.readmanracing.co.uk/parts4sale.php#


Not cheap but a perfect upgrade especially if your tracking your car, quite afew Phers have fitted them.







Edited by portzi on Sunday 21st February 18:29

bobfather

11,197 posts

284 months

Sunday 21st February 2016
quotequote all
It's just my view but I do know others feel the same:

There is a penalty to pay if you fit these. I'm sure TVR didn't build with this in mind but the standard wishbones act as a sacrificial component in side-on collision, they take the hit and the chassis normally comes out unscathed. If you strengthen the wishbones you potentially ensure any side impact will result in chassis bending and it being declared uneconomic repair. Also, I would advise being a little careful about publicising this mod because your underwriters will be very interested to learn that you modified your car to ensure side impact would be multiple times more expensive to repair.

There is a major TVR rebuilder on the continent who considered using these tubular wishbones for his rebuilds but after a little research he chose not to

portzi

2,336 posts

204 months

Sunday 21st February 2016
quotequote all
bobfather said:
It's just my view but I do know others feel the same:

There is a penalty to pay if you fit these. I'm sure TVR didn't build with this in mind but the standard wishbones act as a sacrificial component in side-on collision, they take the hit and the chassis normally comes out unscathed. If you strengthen the wishbones you potentially ensure any side impact will result in chassis bending and it being declared uneconomic repair. Also, I would advise being a little careful about publicising this mod because your underwriters will be very interested to learn that you modified your car to ensure side impact would be multiple times more expensive to repair.

There is a major TVR rebuilder on the continent who considered using these tubular wishbones for his rebuilds but after a little research he chose not to
Thanks for your wise words Bob. Has this been officially tested on a metal tensile test bed yet to prove this, tubular against the standard u channel type?

bobfather

11,197 posts

284 months

Sunday 21st February 2016
quotequote all
Not to my knowledge, I just offer it as something to consider when making this choice

jesfirth

Original Poster:

1,743 posts

271 months

Sunday 21st February 2016
quotequote all
Thanks chaps. I will give john a call in the morning.

Had never thought about the side impact issue and potential damage to the chassis. TBH though if I am bending them when sprinting sooner or later one will collapse and on a lot the circuits that could cause a big accident so I am better off having stronger wishbones and hopefully avoiding the crash in the first place.

portzi

2,336 posts

204 months

Sunday 21st February 2016
quotequote all
bobfather said:
Not to my knowledge, I just offer it as something to consider when making this choice
I have already forgotten about this thread and everything we have discussed smile, tubular wishbones again??? never heard of them

phazed

22,464 posts

233 months

Sunday 21st February 2016
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Edited by phazed on Sunday 21st February 22:34

jesfirth

Original Poster:

1,743 posts

271 months

Monday 22nd February 2016
quotequote all
Phased. How did you manage to do that?

phazed

22,464 posts

233 months

Monday 22nd February 2016
quotequote all
jesfirth said:
Phased. How did you manage to do that?
Do what?

jesfirth

Original Poster:

1,743 posts

271 months

Monday 22nd February 2016
quotequote all
I thought that the front round bar of the lower wishbone looked bent! An optical illusion in the photo? How have you found them - are they good?

phazed

22,464 posts

233 months

Monday 22nd February 2016
quotequote all
Special bent tubular wishbones from John Reid.

These are advantageous with wider rims as you can get full lock without the rim rubbing on the wishbone.

My own wishbones had seen better days and he's upgraded once a double to fit and have more adjustment to increase camber if necessary.

NTEL

5,051 posts

269 months

Monday 22nd February 2016
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jesfirth said:
Thanks chaps. I will give john a call in the morning.

Had never thought about the side impact issue and potential damage to the chassis. TBH though if I am bending them when sprinting sooner or later one will collapse and on a lot the circuits that could cause a big accident so I am better off having stronger wishbones and hopefully avoiding the crash in the first place.
Hi Jez, Don't worry about the tubular bones. I tested them for real in the Tuscan Challenge car and the race Tasmin wink Never any chassis damage. You need tubular bones when bouncing over kerbs. If anything gives it will be the wishbone mounts which are easy to replace.


Richard 858

1,882 posts

164 months

Monday 22nd February 2016
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phazed said:
Special bent tubular wishbones
eek curved maybe or even concave/convex but not "bent" surely hehe

ClassiChimi

12,424 posts

178 months

Monday 22nd February 2016
quotequote all
The fast back straight at Bedford Autodrome Broken up by the fast left/right chicane, I was stealing most the curb on the left, massive vibrations and I was wondering about the standard wishbones, cringing at the violence going on down there,, if I was into track days as a habit I'd want some of those tubular for sure.
I can't see the caster shin in the picture Peter it is there I assume ?

Pupp

12,948 posts

301 months

Monday 22nd February 2016
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Richard 858 said:
eek curved maybe or even concave/convex but not "bent" surely hehe
Would they be formed on a pipe-curver or concaver then? No, thought not... wink

ClassiChimi

12,424 posts

178 months

Monday 22nd February 2016
quotequote all
Haha, he's got ya there Richard biglaugh

phazed

22,464 posts

233 months

Monday 22nd February 2016
quotequote all
Yep, shim is there painted black.

ClassiChimi

12,424 posts

178 months

Monday 22nd February 2016
quotequote all
phazed said:
Yep, shim is there painted black.
thumbup

Do they feel stiffer Peter, is it discernible,, when your getting high speed bump and re bound it almost feels like the O/E are resonating,, and bending ?? I'm sure there not but they are doing some serious work at that point,,, I'd like those very much scratchchin