Manifold covers/Protectors/shields

[Ballistic Banana]

Anyone seen these on there travels. Not sure what they are made of and what the functions is except as a heatshield maybe...but wouldnt they just pust the heat towards the Main Cat.. Thoughts





BB

[spend]

There are some very hot spots on the manifold Simon, if you can 'smooth' the effect of these it should prevent the odd problem. The total quantity of heat is not going to change much but you wouldn't have like 80% of that energy in a couple of small places.

I'm sure we've seen them on here before some years ago, I have an idea they were from someone like Zertec - but don't hold me to it?

[GreenV8S]

That's bizarre. I've been toying with the idea of making something along broadly similar lines over the winter, but *nothing* like as pretty as those.

The principle I was following is the same one used on Aston Martin etc. If you can catch the hot air around the headers in a sort of upside down gutter and then lead that out to a chimney that dumps the hot air outside the engine bay, then you have got rid of one of the biggest sources of underbonnet heat. In fact since the convection will naturally tend to draw the rest of the hot air from the engine bay along with it, you actually convert the manifold from a big heat source to something that could actually reduce the existing heat soak problem. Since I've already got bonnet vents along the top of the manifold, it seems almost rude not to take advantage of them.

[Johno]

I like those . . . The only issue I would immediately see is the tension wheel for the serp belt may foul the o/s one and it would need a cut out probably. It's an a/c car that one so a different set up.

ETA - Also nice cover for the wiper motor . . .

Edited by Johno on Monday 17th November 21:39

[Peter66]

The problem I see is that they will hit the inner wing in my pre-cat. Barreti knows a lot about this early pre-cat issue and it's likely not a problem for him anymore.

Peter

[Barreti]

Yep, not much chance of us pre-cat boys being able to make use of this batman body armour kit I'm afraid

[97octane]

Johno said:

I like those . . . The only issue I would immediately see is the tension wheel for the serp belt may foul the o/s one and it would need a cut out probably. It's an a/c car that one so a different set up.

ETA - Also nice cover for the wiper motor . . .

Edited by Johno on Monday 17th November 21:39

Indeed, I had a problem with fitting the Steve Heath heatshield on the O/S of my 500 - we took measurements and the tension pulley is just too close to the manifold to squeeze the heat shield in. Same problem here, I suspect.

[Simpo Two]

GreenV8S said:

The principle I was following is the same one used on Aston Martin etc. If you can catch the hot air around the headers in a sort of upside down gutter and then lead that out to a chimney that dumps the hot air outside the engine bay, then you have got rid of one of the biggest sources of underbonnet heat. In fact since the convection will naturally tend to draw the rest of the hot air from the engine bay along with it, you actually convert the manifold from a big heat source to something that could actually reduce the existing heat soak problem. Since I've already got bonnet vents along the top of the manifold, it seems almost rude not to take advantage of them.

Not a dissimilar idea to quality ovens - the kind with double glazing and a constant fan. The warm air comes out of a slit at the top. That's how the oven stays at 200C but the front is still touchable

[Ballistic Banana]

Apparently its FRP( anyone confirm this is the same as GRP) with heatshield material glued on the inside.

BB