exhaust manifold insulating wrap.

[agbucks]

in an attempt to protect my starter motor from high temperatures, i have purchased some exhaust insulating wrap.

 

what is the best way to secure to the manifold? options seem to be stainless cable ties (as used on cv joint rubber boot), ss locking wire or the stainless 'snap strap' from demon tweeks/burton etc.

 

anyone any experience?

 

 

[Jason Plato]

Ive used the stainless locking wire , tried the snap strap but it came loose after about 1000 mile - must be the expansion or something .

 

Wear a pair of latex gloves when putting it on - the fine fibers are realy itchy .

 

dave

[acw]

I used stainless 'jubilee' clips on mine.

 

Andrew

[Slarty Blat Fast]

Are there any other benefits from insulating the manifold tubes, apart from cooling the passenger's footwell?

 

Slarty Blat Fasttongue.gif

[James Arnold]

Check the archive, I know there has been at least one thread where the benefits of exhaust wrap has been discussed at some length

agbucks (what sort of name is that?) I'd be interested to hear what effect it has when you fit the wrap.

James

[Jason Plato]

It can help in reducing underbonet temperatures significantly , especially if you race or sprint where the underbonnet temp can rise to up and above 40c whilst you are forming up on the grid , and take more than 3mins at 60mph to fall to within 10c of ambient - this is not good news for power .

Plus some will say that the wrap increases the temp of the manifold and speed of gas exiting ( ??? ) , however some will also argue that the heat retained within the manifold will then pass into the head .

 

I run wrap to reduce underbonnet temps , protect the alternater and starter motor .

 

Dave

 

Edited by - Dave J on 21 Feb 2002 17:13:13

[Mr Locust]

Is your manifold stainless?

 

I used this on a carbon steel item and the trapped moisture corroded it through in about 12 months.

[JP]

I've heard much the same as Locust - I considered it when I had my manifold made but was advised (by the chap who would have sold and fitted the wrap) that unless you really needed that extra (debatable) bit of power the life shortening effects on the manifold made it not worthwhile.

[John Howe]

I used Jubilee clips on each end of all four tubes, then the lagged tubes were then sprayed with heat "reflective" paint.

 

I have recently removed the exhaust after being in situ for two years and they still look fine, though this time, when the engine goes back in, I will add a further wrap, this time embrasing all four pipes in a all enveloping "thermal shield". Ignoring any tuning advantage, the reduction of heat within the engine bay more than justifies the cost of the material.

 

Though your first drive after insulation can be amusing when other motorists, at traffic lights, start to notice the clouds of smoke creeping out of the bonnet vents as the paint cooks - but in a few miles even the smell has gone.

 

JH