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Just bought an old Porsche 928 in deep need of TLC.
Just stripped down everything on the engine bay and found out that the exhaust manifolds are really not in their best shape and also because of the heat produced inside the engine bay my mechanic advised me to get them ceramic coated.
I have searched and found out that Zircotec offer the best thermal barriers.
But I also found these guys Performance 1 Coatings and I couldn't find that much information. It seems they do work for OEM companies but just wanted to know if anyone had any experience with them.
Welcome- tell us more about your new 928- year, and what TLC is needed. I will go out on a limb and opine that coating your exhaust manifolds is not in the top 10 TLC items on the list- coating them certainly wouldn't hurt, but the engine compartment will still get plenty warm even with them ceramic coated.
FWIW, I had mine done by Jet Hot coatings, their Extreme Sterling coating. $255.50 with shipping, back in 2009.
i had mine done also..perhaps around the same time as Rob here but via a Vegas company.. Still look good. Whether it keeps things a bit cooler under the hood may be debatable but while i had them out i did it. Mine are a dark gold..bronze color.
Welcome- tell us more about your new 928- year, and what TLC is needed. I will go out on a limb and opine that coating your exhaust manifolds is not in the top 10 TLC items on the list- coating them certainly wouldn't hurt, but the engine compartment will still get plenty warm even with them ceramic coated.
FWIW, I had mine done by Jet Hot coatings, their Extreme Sterling coating. $255.50 with shipping, back in 2009.
did you remove the coating on the sealing surface to the heads? Or leave as is?
waste of time.. no gains even remotely possible especially with a stock manifold.
do it for looks and looks alone.
if you want some performance gains, get some headers but those will cost more than the $250coating price tag and be more difficult to mate to the cats.
bolt up the old S4 manifolds and use new gaskets and they will be good for the next 250k miles.
waste of time.. no gains even remotely possible especially with a stock manifold.
do it for looks and looks alone.
if you want some performance gains, get some headers but those will cost more than the $250coating price tag and be more difficult to mate to the cats.
bolt up the old S4 manifolds and use new gaskets and they will be good for the next 250k miles.
my coating only cost $80 Canadian at Fireball. Agree it's just for looks.
As of now we do not know what year his "old Porsche 928" actually is ..........my guess is a 16 valve with cast iron manifolds but ???? And sure they look rusty, but so what ?
928 Exhaust system high temperature paint/clear coat to prevent rust
Anyone have any thoughts on a high temperature paint or clear coat that will keep my new exhaust system free of rust and showroom shiny?
I don't want anything to catch on fire and would prefer a shiny clear coat paint that will prevent rust/dirt/exhaust deposits, etc. this was on amazon
If you decide to go that route, you will want to use their header paint, not the engine enamel as it won't hold up to the heat. It is only available in satin not gloss. In the VHT line it is their part number SP115.
That extreme heat paint mentioned above sounded interesting, haven't tested that one. I have tried many of the other high heat paints through the years with 2-stroke and 4-stroke engines. Not one of them have lasted on the exhaust manifold/headers closest to the engine. The paint cracked and fell off. On the tuned pipe(2-stroke) or further away from the engine the paint usually holds a bit better. The only thing that have worked to hold the heat for me is ceramic coating or change everything to stainless steel. Chrome will be discoloured but hold just for a while. Even ceramic coating needs to be handled with care and kept clean because it is a very thin coating. Easy to be damaged and start to corrode with heat and moisture. Another thing, ceramic coating will actually hold the temperature better in the system and radiate a bit less heat out. This is very obvious when testing coated tuned pipes on 2-stroke systems. So to say that ceramic coating it is just for show is not true.
Besides an improved appearance, the ceramic coating only offers a minor tangible benefit from radiant heat transfer - but only if the correct color range is selected. I'm not aware of any studies done specific to engine compartments and the reduction in radiant heat, but there are numerous other published studies pertaining to radiant heat.
Painted coatings, as noted, begin to fail after a few years - and therefore do not offer the best long term solution.
08-31-2016, 11:24 AM
Porsche 928 exhaust manifold ceramic coating
