but can it walk the walk?
Discussion
i was fishing for thermo-reflect material and came across this on the agriemach site...
HIGH VELOCITY - EXHAUST JACKET - sounds great, but... other threads have mentioned wrappings being a breeding environment for mr. rust and my garage bloke poked me in the eye with his spanner whilst saying that you want to get rid of the manifold heat not trap it in. who knows?...but i don't ask him questions anymore.
apparently it can be installed with the headers mounted, reduces underhood temperatures up to 70%, increases horsepower and fuel efficiency and they withstand temperature up to 2000ºF. you get a set of what looks like 8 woolly socks + fastening bits.
what are your views boys & girls?
HIGH VELOCITY - EXHAUST JACKET - sounds great, but... other threads have mentioned wrappings being a breeding environment for mr. rust and my garage bloke poked me in the eye with his spanner whilst saying that you want to get rid of the manifold heat not trap it in. who knows?...but i don't ask him questions anymore. apparently it can be installed with the headers mounted, reduces underhood temperatures up to 70%, increases horsepower and fuel efficiency and they withstand temperature up to 2000ºF. you get a set of what looks like 8 woolly socks + fastening bits.
what are your views boys & girls?
i was fishing for thermo-reflect material and came across this on the agriemach site...
apparently it can be installed with the headers mounted, reduces underhood temperatures up to 70%, increases horsepower and fuel efficiency and they withstand temperature up to 2000ºF. you get a set of what looks like 8 woolly socks + fastening bits.
what are your views boys & girls?
Got it on mine, it reduced the underbonnet temperature significantly and the rate of component failures has dropped sharply. Sadly the manifold rusted through after a mere 120,000 miles though.
[rambleon]
I have heard good and bad about this,more being good.
Any heat that is pushed away from the Engine Bay has got to be Good,especially when its known that Starter solinoids(sp) alternates and i am sure a few more electrical things Get Fried due to the Heat that is trapped under the Bonnet.
The only bad thing i read somewhere that obviously as the heat wasnt being relesed through the whole lenght of exhaust that anything after the 'wrap' was going to be more prone.
Sure there was something about the Grp Melting on some thread.
But then if its the exhaust under the car that now has to deal with being Hotter i should think it would deal with it better as the airflow is better here.
Dont Know if that makes any sense,but i would be up for Trialing it and if Pete has 120k before rusting Manifolds i think i would be up for that.
[/ramblefinish]
BB
I have heard good and bad about this,more being good.
Any heat that is pushed away from the Engine Bay has got to be Good,especially when its known that Starter solinoids(sp) alternates and i am sure a few more electrical things Get Fried due to the Heat that is trapped under the Bonnet.
The only bad thing i read somewhere that obviously as the heat wasnt being relesed through the whole lenght of exhaust that anything after the 'wrap' was going to be more prone.
Sure there was something about the Grp Melting on some thread.
But then if its the exhaust under the car that now has to deal with being Hotter i should think it would deal with it better as the airflow is better here.
Dont Know if that makes any sense,but i would be up for Trialing it and if Pete has 120k before rusting Manifolds i think i would be up for that.
[/ramblefinish]
BB
Tis covered in the new bible. My recommendation is to wrap from the engine to where the manifold pipes come together. Leave the cat chambers as is.
Manifold deteriation can be bad. The 520 manifolds are wrapped and will need to be replaced this Winter due to rust.
Steve
www.tvrbooks.co.uk
Manifold deteriation can be bad. The 520 manifolds are wrapped and will need to be replaced this Winter due to rust.
Steve
www.tvrbooks.co.uk
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Got it on mine, it reduced the underbonnet temperature significantly and the rate of component failures has dropped sharply. Sadly the manifold rusted through after a mere 120,000 miles though.
Thats incredible, i've heard of them rusing away in 12 months, i guess it depends on the quality of the manifolds & whether the car gets properly hot during journeys, I can't imagine a certain green V8S arriving anywhere not fully warmed up
.
If anybody intends to replace there manifolds prior to wrapping i would recommend fully annealed stainless, only 50% more than Mild steel, if wrapping excisting manifolds make sure they are in good nick.
Tim.
Got it on mine, it reduced the underbonnet temperature significantly and the rate of component failures has dropped sharply. Sadly the manifold rusted through after a mere 120,000 miles though.
Thats incredible, i've heard of them rusing away in 12 months, i guess it depends on the quality of the manifolds & whether the car gets properly hot during journeys, I can't imagine a certain green V8S arriving anywhere not fully warmed up
. If anybody intends to replace there manifolds prior to wrapping i would recommend fully annealed stainless, only 50% more than Mild steel, if wrapping excisting manifolds make sure they are in good nick.
Tim.
I had the manifolds in my old S wrapped and as Peter described it does reduce the under bonnet temp considerably.
I do intend on doing the Griffith aswell.
As for rusting manifolds, that really depends on how much you use the car IMHO. If it is going to sit there without daily iuse then they are going to rust as the material will hold the moisture in.
If however you use the car everyday then this should significantly reduce the likelyhood of this outcome.
I do intend on doing the Griffith aswell.
As for rusting manifolds, that really depends on how much you use the car IMHO. If it is going to sit there without daily iuse then they are going to rust as the material will hold the moisture in.
If however you use the car everyday
then this should significantly reduce the likelyhood of this outcome.
I do intend on doing the Griffith aswell.
I wouldn't if the car is still under warrenty. The only reason it got done on the 520 is because I effectively doubled the engine power and heat dissapation.
The Shopping trolley is as is in the manifold wrapping department.
Steve
>> Edited by shpub on Thursday 5th December 11:50
I had similar problem on my Midget.
Bought a 4 branch and wrapped it. It snapped within a couple of months. The company sent a new manifold under warranty (I may have forgotten to mention that I had wrapped it
).
I didn't wrap the second one, and it lasted 18-odd months, until I fitted a different design.
Also I think an engine builder/tuner told me a story about taking a wrapped manifold off an MGB, and it not fitting back on 'cos it had warped that much.
Just my limited experience.
I did however have my last manifold externally 'Aluminium Flame Sprayed' by a place in peterborough. Gives a very tough silver/white finish (I imagine easily painted) that lasted 18 months - including the bit under the car - 'til I took the car off the road. It still looks good the couple of years it's been sat in the garage. Dunno what the inside of the manifold is like though
Cheers, Phil
Bought a 4 branch and wrapped it. It snapped within a couple of months. The company sent a new manifold under warranty (I may have forgotten to mention that I had wrapped it
). I didn't wrap the second one, and it lasted 18-odd months, until I fitted a different design.
Also I think an engine builder/tuner told me a story about taking a wrapped manifold off an MGB, and it not fitting back on 'cos it had warped that much.
Just my limited experience.
I did however have my last manifold externally 'Aluminium Flame Sprayed' by a place in peterborough. Gives a very tough silver/white finish (I imagine easily painted) that lasted 18 months - including the bit under the car - 'til I took the car off the road. It still looks good the couple of years it's been sat in the garage. Dunno what the inside of the manifold is like though
Cheers, Phil
according to the agriemach back-room boys, the insulation of the manifold will not affect it nor the rest of the exhaust components, as it causes the hot gases to exit more quickly thereby dissipating the heat into the atmosphere much faster. It will however protect other underhood components from the effects of excessive heat and increase their usable life.It will also improve performance and reduce fuel consumption.
They also suggest the jackets (read 'woolly sock things') are a 'loose' fit allowing for some air movement but intimate they would be best used on stainless...whilst for iron they recommend the heat blanket.
A panacea perhaps?
Would prepping the manifolds (ie manifold paint) alleviate / postpone the onset of rampant oxidation if the jackets were used...?
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