12 replies to this topic

[JonBooth]

Hello,

Just a quick one, just wondering if anyone has heat wrapped their exhaust manifold on a draw through supercharged Mini? Particularly concerned with the centre branch as it is in contact with the underside of the inlet manifold. I've read some bad things about heat wrap and have read that a mild steel manifold should not be wrapped, however it can't be good for intake temperatures for it to be in contact with the exhaust. I have no experience with heat wrap and just wondred if anyone else has.

Any advice would be great,

Cheers,

Jon.

[Tupers]

It's OK the wrap mild steel but it will lessen the parts life span as the heat that's kept in the tube will cause it to decay over time. That's not to say that it will destroy your exhaust over night though it take quite a while to really have any effect on the steel.

Personally I'll be taking the risk and wrapping my exhaust manifold but it's worth notting that most manufacturers (Manifolw included) wont warranty their products is they suspect they've been wrapped.

[Sam Walters]

There is more to be worried about then just manifold damage. I experienced detonation when readily when i had a wrapped exhaust.

I was warned, but to be honest im a bit of a tool.

Edited by Sam Walters, 08 February 2012 - 11:44 PM.

[JonBooth]

Thanks for the comments, How come you experienced detonation? I thought the potentially lower intake temperatures as a result of less heat transfer would reduce the chance of pre detonation?

Cheers,

Jon.

[freshairmini]

You can get your exhaust ceramic coated, supposed to be better than heat wrapping, and i think you dont get all the bad effects of heat wrapping.

Have a look: http://www.zircotec....classic_cars/14

[new_zealand _minis]

ive wrapped mine . car goes fine . keeps the temps down alot !

i just put a crap load of paint on under the wrapping

[jamesmpi]

You can get your exhaust ceramic coated, supposed to be better than heat wrapping, and i think you dont get all the bad effects of heat wrapping.

Have a look: http://www.zircotec....classic_cars/14

I've just brought a new LCB manifold for my mpi and was thinking about wrapping it, but like JonBooth i am a little unsure about it......but then looking at the option for ceramic coating it i think this looks like a great idea. Plus they are based in Abingdon Oxfordshire which are 30mins from where i live...bonus!!

[Monstrous]

Thanks for the comments, How come you experienced detonation? I thought the potentially lower intake temperatures as a result of less heat transfer would reduce the chance of pre detonation?

Cheers,

Jon.

I would imagine because of the increased residual heat in the exhaust ports and manifold, due to the wrap, the exhaust valve temperature increases, so any unburnt air-fuel mixture in the camber after ignition and exhaustion of the gases is ignited from the higher temp

[freshairmini]

Thanks for the comments, How come you experienced detonation? I thought the potentially lower intake temperatures as a result of less heat transfer would reduce the chance of pre detonation?

Cheers,

Jon.

I would imagine because of the increased residual heat in the exhaust ports and manifold, due to the wrap, the exhaust valve temperature increases, so any unburnt air-fuel mixture in the camber after ignition and exhaustion of the gases is ignited from the higher temp

Isn't that down to bad engine set-up not heat wrap, obviously the increase in heat would cause detonation but that's not a reason to not have a heat wrap. Surely that would mean the ceramic coating would do the same, and that cant be bad as well, as lots f racing car use that kind of thing.

[jamesmpi]

Just had a quote back from Zircotec to protect my LCB.....

£150 for a standard satin black colour and £250 for one of their performance colours......

[freshairmini]

lol, bit much for a mini maybe

[jamesmpi]

Very. My LCB was only about £120 from Minispares.

[HUBBA.HUBBA]

Heat wrap will be fine. Do the inlet under the charger as well as it will also keep the heat out! Cause the inlet and the outlet are on the same side of the head. Hence why there is a heat shield on a standard HIF44 non charged set up.