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The mkiv Supra Owners Club

High temp exhaust coatings


TLicense

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What/who have people used in the past to coat down-pipes and manifolds? I'm not too keen on the wraps.

Also what exactly should I get coated. Manifolds are a given. DP I guess wouldn't hurt. Anything else?

 

Cheers,

 

Tony

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DP I guess wouldn't hurt.

 

I know its in technical, but this made me chuckle :)

 

Theres a place near me that does powdercoating, but also does a ceramic treatment on exhausts. I can get you their contact details if you want.

 

What do you want to achieve by adding a high temp coating?

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I know its in technical, but this made me chuckle :)

 

I'm not angry, just dissapointed. :D

 

Theres a place near me that does powdercoating, but also does a ceramic treatment on exhausts. I can get you their contact details if you want.

 

What do you want to achieve by adding a high temp coating?

 

Cheers that would be great.

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What do you want to achieve by adding a high temp coating?

 

Keep the engine compartment temps low..

 

having said that, wouldnt that raise the temp of the manifold and exhaust, which would probably result in the failure of that material as it was never designed to be coated...

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theres a guy a know who had his manifolds and downpipes powder coated on his cobra it made a huge differance to the exhaust temps as he kept getting fuel lock when the temps were raised. but then his car is well over 800bhp

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I've only ever used exhaust wrap for cooling purposes in the engine bay. Like in my Tiger where temps threaten to melt everything crammed in from clutch cables to boiling brake lines. I used Thermotec wrapping, athough there is cheaper out there that works fine I'm sure.

 

I'm not aware of any performance enhancement from doing it?

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I'm not aware of any performance enhancement from doing it?

 

In theory it ought to because when the exhaust gas cools it slows down and you want it flowing away as fast as possible, especially before the turbo. Dunno if you'd notice anything in practise. I don't think any of the coatings work as well as sealed heat wrap.

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If it's a stainless tubular manifold don't waste money getting it thermally coated, it will just make trying to weld it up again WHEN it cracks all the harder. Spend the money totaly revising the turbo support system.

 

None of the BL one's have cracked yet in many thousands of miles....

 

I'd coat it and wrap it...the more you do to insulate it the better.

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I think someone should start a Poll for the peolpe running tubular manifolds stating mileage of use and have they cracked yet . This talk of ALL tubulars craking is getting a bit boring now :innocent:. Specialy seeing as i know of Cast craking also and yet I dont condem them ;)

 

 

As as alex has pointed out None of the full tubular form BL have craked yet ...can't speak for any other manufacturer like PHR ect ect , but I believe they have been ok thus far. So I would love to know what far east asian manifolds you keep running across CW

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I think someone should start a Poll for the peolpe running tubular manifolds stating mileage of use and have they cracked yet . This talk of ALL tubulars craking is getting a bit boring now :innocent:. Specialy seeing as i know of Cast craking also and yet I dont condem them ;)

 

You should condemn them, the stock one doesn't crack, I have seen 300,000 mile ones with no cracks. I have yet to see any mass produced aftermarket turbo manifold that is as good as an OE one. Fact is no one will pay the going rate for low volume manifolds made correctly, from the correct material. The cast iron ones I am such a fan of are nearly always ordinary grey cast iron, and not something like a high nickel content iron like the stocker. There are a lot of single and multi turbo tubular, aftermarket manifolds cracking, it's a fact, not just on Supras, but Skylines, GTO's, 300 ZX's, what have you. Once they HAVE cracked it's a bugger to reapir them as carbonisation of the crack has occured, and contaminates the weld puddle, as well as the fact they have suffered oxygenisation through heat cycling. I am not trying to have a dig at anyone, it's a fact of life running most aftermarket tubular ones, and some cast ones, used hard.

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Well as most after market parts are never required to go through the OEM testing it's only natural that they will never better OEM reliability or quality. Having said that I have also seen STOCK manifolds with cracks in them so they to are not infalable. I just think your sweeping statement of they will fall to bits the minute you put them on is getting somewhat tiresome, I'm sorry if this offends you, But I know and have seen well made tubulars and cast that have been fine for a number of years and have been used HARD and some of the bigger comapnies are backing them up with lifetime waranty, Something which in the aftermarket world parts is rare.

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Mig, perhaps the reason why they have not cracked is simply down to use.

 

A 600HP car on the road, how many people go WOT for more than 20 seconds? How many of your customers actually USE their cars?

 

If you had more customers wanting single turbo cars for the track as opposed to road cars, I bet you would have experienced plenty of cracked manifolds. Not a dig at you or BL kit, but lets not forget, even OEMS cant get tubular manifolds right.

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OK, so... trying to drag the subject slightly back to the point ;)

 

Chris, surely you've had dealings with thermally insulating manifolds/downpipes? What would you recommend?

 

As for the manifolds themselves, I'll take a look at them and see if there's anyway I can brace them, similar to the way the stockers are braced IIRC.

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Mig, perhaps the reason why they have not cracked is simply down to use.

 

A 600HP car on the road, how many people go WOT for more than 20 seconds? How many of your customers actually USE their cars?

 

If you had more customers wanting single turbo cars for the track as opposed to road cars, I bet you would have experienced plenty of cracked manifolds. Not a dig at you or BL kit, but lets not forget, even OEMS cant get tubular manifolds right.

 

LOL I havent got any customers. As I dont sell any kits :) so I am impartial. But as stated I have seen many of both types used hard and everyday on track and on the road with no problems so far. This is a very good point you bring up which I think is being overlooked. Trying to compare OEM parts to Aftermarket parts when shooting for performance is like compairing a knife agaisnt a cannon. Aftermarket parts will never be made to OEM standards but are more durable than are being made out to be. My point is that this drum being beaten of ALL tubular manifolds crack and cast is far superior isn't valid IMHO . I have seen many cracked cast manifolds that have never been near a track in their life but yet I'm not here with my big paintbrush condeming the whole lot of them even OEM. Aftermaket moding to gain performance always comes at the expence of reliability to some extent, The budget spent on after market parts for one is nothing compaired to OEM.

 

 

My appologies to Tony for the hi-jack.

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Sorry, my understanding was/is that you work for Vortex?

 

For my 2p: I will be using a tubular manifold (one of the best makes available) to 10/10ths in the next few months. I am hoping it will not crack, but it will be a great test.

 

I think the void here does come down to use (manic track racer vs road users). No, not all cast manifolds are infallible, nor will every tubular manifold crack, but the odds for a tubular surviving hard use are low.

 

Tony, to redeem this highjack, I will be using HPC coating, after some though and research.

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Nope don't work/own Vortex and haven't done for a very long while ..amazing how these runmours fly about ;)

 

 

 

Depends on the the manifold and how it's made. FR have been using the same Tubular manifold on their race car for 6 years now with no problems whatsoever and also on their road/track car.

And BL and PHR too I believe. One of them companies maybe 2 even give full life time waranty they are so confident about their manifolds. So I think they are too many variables to condem them all TBH , weld , material ect ect ...But with the spate of people now bying cheap Ebay manifolds ..I can see how this reputation can clearly get out of hand. I'm sure there are now plenty of members on here with tubulars that could chime in whatever make or creed they have. That's my only concern is the broad brush statement that keeps popping up. :)

 

Once again Tony my apologies

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i bought some thermotec heat wrap 90 foot of 2" wide on ebay from america.supposed to be good up to 2000 degrees.going to use for manifold and downpipes.aint the benifits of keeping heat out of engine bay good thing.

wonder if its of benifit on stock turbo system?

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wonder if its of benifit on stock turbo system?

 

Probably, but it'd be next to impossible to wrap given the amount of crap in the way and design of the pipework I would think. Thermotec is the stuff I used, along with the spray that seals it.

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