Stainless Steel Chassis

Stainless Steel Chassis

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aderut

Original Poster:

163 posts

173 months

Thursday 13th January 2011
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Does anyone know if the SEAC recently sold via Pistonheds, as "Peter Wheeler's own SEAC" had a stainless chassis. TheSEACpages has a comment from Chris Schirle saying that there were 1 or 2 stainless chassis on road cars.
It would be nice to know how many there are.

gruffalo

7,521 posts

226 months

Friday 14th January 2011
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Wouldn't that be rather heavy?

JR

12,722 posts

258 months

Friday 14th January 2011
quotequote all
aderut said:
Chris Schirle saying that there were 1 or 2 stainless chassis on road cars.
It would be nice to know how many there are.
gruffalo said:
Wouldn't that be rather heavy?
What do you mean? Heavy if a road car had two SS chassis? I suppose that it would be.

aderut

Original Poster:

163 posts

173 months

Friday 14th January 2011
quotequote all
I gues it would depend on the gauge of the SS tubing, knowing TVR it would be like folded cooking foil rather than oil pipe-line stuff.

By the by, on trying to get back on subject. The "ex Peter Wheeler" car was sold by David Gerald, and was on a "Preston" DVLA plate rather than a "London" area plate (eg D*** *LL or D*** *LP).

I know that D175ALL was ordered with a SS chassis, and I believe that it was not delivered with one due to problems expereienced with D177ALL.

adam quantrill

11,538 posts

242 months

Saturday 15th January 2011
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gruffalo said:
Wouldn't that be rather heavy?
How heavy do you think Iron Oxide is compared to the original iron though?

After 20 years the insides of TVR chassis tubes have oxidised quite a lot, and you are effectively carrying around a weaker chassis and a load of oxide.

You can make a stainless one thinner as there will be no corrosion damage. However when this topic was kicked around a few years ago, the concensus was that it would be even more prone to fractures. It would probably need to be welded up once a year / every 10,000 miles.

Wedg1e

26,802 posts

265 months

Saturday 15th January 2011
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adam quantrill said:
You can make a stainless one thinner as there will be no corrosion damage.
In theory. In practice you'd probably find that 1.5" stainless tube with a wall of less than the 2mm nominal (as used on the mild steel version) is sold as 'ornamental' tubing, OK to hold up your coffee table but not much more wink

Stainless is less ductile and less malleable than mild steel, hence when subjected to repeated flexing it cracks. From an anti-corrosion point of view it'd probably have made more (engineering, if not cost) sense to build the wedge chassis from pre-galvanised tube and then apply local touch-up after welding. Not as good as hot-dip galv., but better than paint and wouldn't risk any distortion from the immersion. Lotus galvanised their wedge chassis from the early 80s without any apparent issues, although their chassis were fabricated sheet rather than tube (the Esprit was 50/50) - and they had no outrigged sections to catch road spray.

rev-erend

21,414 posts

284 months

Saturday 15th January 2011
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I know from personal experience that Stainless is harder to weld well that is mild steel. So given some of the horror pictures posted here on the wedge forum of TVR's welding in that era .. the thought of a Stainless chassis is not such a good idea.

Wedg1e

26,802 posts

265 months

Saturday 15th January 2011
quotequote all
rev-erend said:
I know from personal experience that Stainless is harder to weld well that is mild steel.
Depends on the tehnique and gas used: MIG with CO2 wouldn't be very nice. TIG/Argon should be gorgeous.

GTRene

16,538 posts

224 months

Saturday 8th September 2012
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here some info about the stainless steal chassis on a 420 seac?

http://www.theseacpages.co.uk/racer.aspx

they had not the right stuff to do that at that time I guess?

but there is a UK builder that can deliver a proper stainless steal TVR chassis I guess?
here they advertise it as a possibility.

http://www.tvrpower.co.uk/news/slug/tvrpower-oem-c...

said:
Everything will be available for you to buy in person and also from TVR Power’s online store, so purchasing your new OEM chassis and components couldn’t be easier. For the connoisseur, zinc coated and even stainless steel OEM chassis are also an option, with prices available upon request.

PoleDriver

28,637 posts

194 months

Sunday 9th September 2012
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I looked at this with a stainless steel fabricator.
Don't forget that there are many grades of stainless, all with different properties.
The main properties of concern are:-
Weldability
Weight
Malleability
Strength

We could not find any of the Stainless materials which could match mild steel in all aspects, so a compromise would have to be made. The only practical compromise would be to go heavier.

Mr Tank

5,797 posts

275 months

Monday 10th September 2012
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aderut said:
Does anyone know if the SEAC recently sold via Pistonheds, as "Peter Wheeler's own SEAC" had a stainless chassis.
Hi Adrian

Sorry I missed this!

Amos actually Sold the car?

What was the price?

Andy

aderut

Original Poster:

163 posts

173 months

Monday 10th September 2012
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Hi Andy,
Not sure of the price, This tread goes back a long way...
I'm sure that the stainless chassis was another really great TVR idea that went something like this.
"Let's do it! Let's sell it! We'll let the customer road test it for us. Oh, *rap it doesn't work! we'll drop it, but there's this other realy great idea which we've got........."
From much of the comment it would seem that Stainless gives very little advantage with large cost and manufacturing problems, so (and I stand to be corrected on this one) there are very few SS chassis out there and those that are are most probably ex-factory.
All best
Ade

GTRene

16,538 posts

224 months

Monday 10th September 2012
quotequote all
I also came across some build tread were (I believe a Dutch guy) were he did made new outriggers? from stainless steal to the mild-steal chassis...

see if I can find that back...

ah, found it biggrin

http://olavbergman.nl/olavs-classic-cars/tvr-s-ser...



look under my TVR S-series restauration, here more pictures

http://olavbergman.nl/olavs-classic-cars/tvr-s-ser...

Edited by GTRene on Monday 10th September 12:51

Flares&Chestwig

769 posts

208 months

Monday 10th September 2012
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Reminds me, need a update/progress fix from Martin ?


Mr Tank

5,797 posts

275 months

Monday 10th September 2012
quotequote all
aderut said:
Hi Andy,
Not sure of the price, This tread goes back a long way...
I'm sure that the stainless chassis was another really great TVR idea that went something like this.
"Let's do it! Let's sell it! We'll let the customer road test it for us. Oh, *rap it doesn't work! we'll drop it, but there's this other realy great idea which we've got........."
From much of the comment it would seem that Stainless gives very little advantage with large cost and manufacturing problems, so (and I stand to be corrected on this one) there are very few SS chassis out there and those that are are most probably ex-factory.
All best
Ade
Hi

Well the last time I spoke to Amos when I tried to get him to come to BBWF he still had it and he said he was intending on keeping the car, But he values it at around £20 - £22K or more. Knowing him if somebody went to him with around £24K he would sell it!

Andy

Mr Tank

5,797 posts

275 months

Monday 10th September 2012
quotequote all
Hi

I can now squash the rumour that the SEAC Racer has a Stainless Chassis!

No it doesn't.

If it did originaly I don't know, but now its a painted steel chassis!

Andy

aderut

Original Poster:

163 posts

173 months

Monday 10th September 2012
quotequote all
Hi Andy,
Very curious about the racer chassis not being stainless.
It was always said the SEAC stainless chassis were made because they replicated the racer.
As ever TVR's customer information/misinformation has much to answer for.
I guess the last laugh is on us.
Oh! The fun they had.
Tee-Hee!!
Ade

stainless_steve

6,031 posts

258 months

Monday 10th September 2012
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No problem making a stainless chassis,just alot more man hours building it.
The big question is why would you,a normal chassis is good for 20+ years.

GTRene

16,538 posts

224 months

Monday 10th September 2012
quotequote all
20 years...
sounds great for maybe the present owner, but not so for the owner after say 30 or 40 years, like those who buy now grantura's or M-series etc biggrin

stainless is also fine between the ears...
and I guess you save some hours prepping the chassis for painting and or powder coating etc.

so it cost some time building but you save some time because you don't have to protect it they way a mild-steal chassis needs.

and in the bar you can say, mine has a stainless steel chassis that won't rust biggrin


stainless_steve

6,031 posts

258 months

Monday 10th September 2012
quotequote all
Not quite,stainless hates salt,so if your using the car all year it would be better to coat it