Ideas on gasket material for this unusual setup

[vivaspeed]

I have acquired a super rare Blydenstein sidedraught manifold for my Viva.  It is a combined manifold and rocker cover, but the downside is they have two ports in the head for an exhaust pre-heating setup (usually under where the Blydenstein wording is).

 

 

Below I'm pointing at an intake port, not the exhaust port on the head.

 

 

 

So, my dilemma is what material to make the gasket from?  Standard, they have a cork gasket for the rocker cover and an exhaust gasket type material for the intake - because they are two separate parts.  I would use standard gasket paper, but not sure if the exhaust port will cause a problem with that and burn the paper, leading to a leak or some other unwanted events.  

 

Or should I make the whole gasket out of some other material - like exhaust gasket material - but that would be a bit shit to make.

 

Another option is to bung up the exhaust pre-heating outlets with a frost plug - although not sure the size would be standard.

 

Give me your thoughts and also in my build thread discussion -> //oldschool.co.nz/index.php?/topic/33890-vivaspeeds-no2-viva-discussion/page-2

[tortron]

Laser cut copper

They will last forever and are reusable

[tortron]

2mm is about how thick you want it btw

[Nominal]

I have blocked heat crossover passages in a V8 intake manifold by using a router to skim a few mm or so around the port, then using a thin bit of stainless steel (cut from a warehouse cake slice). This  blocks the exhaust gas from affecting the gasket. A frost plug that fits tight into the head would work as well I reckon.

 

Super cool part BTW.

[RUNAMUCK]

Hi temp RTV has never failed me........

[vivaspeed]

To aid in the explanation, I made this in Paint (the preferred engineering design software of oldschool)

 

[sentra]

i feel as though this gasket should be phenolic,

my secondry feeling is that if i ever needed phenolic sheet, that vivaspeed would be a guy who might have some.

[AllTorque]

Why not use two seperate gaskets like it had originally, assuming they are the same thickness.

[vivaspeed]

Had considered two gaskets but they are quite different thicknesses.

Could replace the cork rocker cover gasket with thick paper and it would be getting closer.

[xsspeed]

in factory guise is it just venting exhaust around the intake manifold/engine bay or is it actually piped somewhere?

[Rookie]

If it was me I would machine up some removable bungs for the exhaust ports and use thick gasket paper for the whole lot.

Super cool setup btw, good score.

[yetchh]

As Bart says, high temp copper plus or copper max.. I use it on my exhaust, never fails.. in fact I use it everywhere.