hello, just got my coupe 20v turbo, had 3 days of fun before the manifold cracked.

im in the middle of replacing it with a later manifold.

been looking into it and not sure what to do with the new manifold,

choices are

heat rap it and put a jacket on the turbo
or
Porcelain coat the manifold and cover the turbo!

what do you guys think?

Interesting. I can't quite get my head round wrapping the turbo.
by doing this you are allowing better efficiency of the exhaust side of the turbo by technically allowing gases to flow faster. which is good plus will possibly aid spool up time.

However this will surely raise the heat of the turbo, this heat then transferring to the compressor side and increasing charge temps which will decrease performance.

marco20vt said:

hello, just got my coupe 20v turbo, had 3 days of fun before the manifold cracked.

im in the middle of replacing it with a later manifold.

been looking into it and not sure what to do with the new manifold,

choices are

heat rap it and put a jacket on the turbo
or
Porcelain coat the manifold and cover the turbo!

what do you guys think?

Click to expand...

fccuk forum are the lads to ask, members on that site well up on knowledge of this sort of thing....good luck

marco20vt said:

heat rap it and put a jacket on the turbo
or
Porcelain coat the manifold and cover the turbo!

what do you guys think?

Click to expand...

Both will make a standard cast manifold more prone to cracking by elevating internal temps.

i got a new manifold and got the in side coated to improve flow!!!
then heat papped the down pipe to keep heat in side the down pipe towards the cat, think this is a much better way, and as for the turbo jacket, forget that, no cover i want to see that thing glow red lol

thanks and way!!!!

Also is there any thing else i should look out for on the coupe??

marco20vt said:

Also is there any thing else i should look out for on the coupe??

Click to expand...

How long have you got?

On modded Coupes

EGTs, caused by excessive backpressure
Overfuelling, caused by incorrect chip
underfuelling, caused by incorrect chip
fuel pump voltage, causes lean running at high revs
detonation, causing cracked pistons
turbo smoking, caused by lack of backpressure

on all 20VTs

wishbone bushes
sticky brakes
frozen handbrake cables
frozen shut doors
alarm problems
rear radius arm bearings
wheel bearings
worn or perished aux belts
failed thermostats
oil (they can use lots - neglect this at your peril)
tyres

FWIW, nobody with decent amounts of power bothers with coating the manifold, ESPECIALLY on the inside. Almost nobody bothers with heatwrapping the manifold or the downpipe.

There's many people over 350bhp on a stock manifold, so it should be waaay down your list of mods