manifolds heat-resistant

[tunepipe911]

Just thinking to put some heat-resistant tape around the stainless steel manifolds,good idea or not?
to protect chassis from exhaust heat,
are exhaust gasses not going to be to hot?
found some special stuff up to 700 degrees,and easy to put around the tubes,
anybody,any good results?
engine is Ford Essex 3000 stock,

Thanks

Rudy

[phillpot]

The opinion has been expressed on other TVR forums that extra heat retained in manifolds could cause cracking at welds ?

[tunepipe911]

ok thanks,

[pridaux]

Hi Rudy
Mine where taped when i got her however i wonder does that have any factor that may be causing her to run a little hotter than i would like 90 to 95 any experience from others appreciated.
Andrew

[bluezeeland]

hi guys,

haven't heard of any cracking of welds (could be thou) anyway my previous car had exhaust insulation, idea being that the gases are more easily discharged of (so, making temps less....) and as pressure build up in exhaust is lower, engine ops is more easy. @ rudy, now that the engine is out would go for insulation by tape (get 2" wide...),or that ceramic stuff even...(tad expensive)
my two pennies worth...

[whitewolf]

I was looking into the same when doing mine...


In the end i left mine as they're mild and wrapping would/could trap condensation/moisture... But anyway yours being stainless wouldn't suffer that problem.


My other thought was... It'll be alright as made 35 years already

[tunepipe911]

the main reason to put the tape on,is that the exhaust-manifolds are so close to the repainted chassis,
I think the paint will melt or burn with this hot metal so close,think off just doing the critical sections,

Edited by tunepipe911 on Saturday 11th August 16:12

[pridaux]

Now your showing off what a workshop LOL please feel free to give a silly answer but would it not be better to take the chassis rail or would that be a moisture trap although it would stay nice and warm?
I suppose if you had powder coated then it would not be an issue as powder coating is baked on.
you could paint that section of chassis with heat resistant engine paint although you would need to strip the paint first or it would bubble through
Andy

Edited by pridaux on Saturday 11th August 18:26

[bluezeeland]

the paint does not bubble off the chassis, as you (rudy and andy) know my chassis is simply painted, and no bubbling/burning or whatever
as in my previous post the gain is in the discharge of hot gasses (chimney effect)

cheers

[whitewolf]

My chassis is purely zinc primer then chassis enamel. Done 2,500 miles and mine are fine near the manifolds

[Fiscracer]

I've wrapped the exhaust on my race cars for years. If the manifold is mild steel the metal gets so hot after time it changes its properties and becomes brittle like glass, which is why welds can fail. If it is stainless steel it's OK.

I regard the manifold as sacrificial and think the benefits outweigh the costs. On a road car you are unlikely to reach the temperatures I do at sustained 5000+ rpm with my race cars.

I use DEi wrap but the accepted wisdom is that coating is better - although not cheap

HTH