Hey all,i have a set of RPW race extractors here and i can't decide wether getting them ceramic coated will be worth the added cost ($300-$400),so i'd like to hear from people that have had it done and those who have experience in this area,keeping in mind the extra heat running on LPG produces.

thanks in advance guy's :)

Hey all,i have a set of RPW race extractors here and i can't decide wether getting them ceramic coated will be worth the added cost ($300-$400),so i'd like to hear from people that have had it done and those who have experience in this area,keeping in mind the extra heat running on LPG produces.

thanks in advance guy's :)

i guess it really depends on how extreme your going

For exampl,e id spend the extra 300-400 on a tune by steve knight, the gains your ognna get from that are going to be significantly better than ceramic coating


personally i think ceramic coating is a load of shit, but i have nothing to prove it one way or another lol

Not very extreme just some ralliart prototype cam's,HF TB,HF cat etc.very mild

I've already spoken to steve about a reflash so i'm just waiting to get everything else installed before i send the ECU over.

for the list of mods you mention id say save the money, but ive always regretted not getting ceramic coating done on my headers

if anything buy the heat wrap off ebay and put that on. $80 a roll

heat wrap holds moisture and will rust your system out quicker..... ceramic coating will make a big diff to under bonet temps. that have its own benifits.

due to the expansion rate of stainless compared to other steels, ceramic coatings often flake off very easily on stainless exhaust parts, that cop the heat, like headers and dumps/ secondarys. For instance its a better idea to buy mild steel headers and get them ceramic coated, which is usually the same price as a set of stainless headers.

due to the expansion rate of stainless compared to other steels, ceramic coatings often flake off very easily on stainless exhaust parts, that cop the heat, like headers and dumps/ secondarys. For instance its a better idea to buy mild steel headers and get them ceramic coated, which is usually the same price as a set of stainless headers.


Agreed, plus ceramic coating incrases mild steels resistance to rust.

I've got a set of ceramic coated RPW race pipes fitted to my TL. The coating cost $300. Initially I thought I'd made a bit of a mistake, but the reduction in coolant temps (about 5 degrees) was a nice bonus. The engine bay is quite a bit cooler too.

I've been thinking about spraying the headers with high temp paint, as they're silver and look quite out of place in an otherwise boring engine bay.

heat wrap holds moisture and will rust your system out quicker..... ceramic coating will make a big diff to under bonet temps. that have its own benifits.

It also does it's job too well by insulating the pipes so much that they can often heat up to near melting point, which over time will lead to them become overly brittle and prone to cracking.

So while heat wrap sounds good on paper - don't touch with a 20' pole.

So are RPW extractor's stainless or mild steel?

The main priority i have is getting the highest gas velocity possible.My theory is with LPG the combustion temp's are higher than petrol so the gas's leaving the combustion chamber are hotter and more expanded therefore taking advantage of the larger primary pipe's without cooling down as much,so that heat will help keep the exaust velocity high which will help with the scavenging effect.So by coating the extractors i would think it would amplify the effect by keeping even more heat in.however would i even notice the real world effects...

So are RPW extractor's stainless or mild steel?

The main priority i have is getting the highest gas velocity possible.My theory is with LPG the combustion temp's are higher than petrol so the gas's leaving the combustion chamber are hotter and more expanded therefore taking advantage of the larger primary pipe's without cooling down as much,so that heat will help keep the exaust velocity high which will help with the scavenging effect.So by coating the extractors i would think it would amplify the effect by keeping even more heat in.however would i even notice the real world effects...

They're mild steel.

Smaller piping promotes a higher gas velocity. RPW's race pipes aren't exactly ideal for this, as they have a 1 5/8' primary, and only really become effective above 2500rpm. Bear in mind though that ceramic coating is applied internally as well as externally, so almost all heat is retained within the pipe.

Honestly though - I don't think you'll see much of an efficiency increase from CC.

Veradabeast:i know what your saying but i think with the LPG's extra heat this would somewhat compensate those low rpm losses and bring that effective rpm range back down to what a pacemaker style primary pipe would provide while still having that extra top end flow.

I've got a set of ceramic coated RPW race pipes fitted to my TL. The coating cost $300. Initially I thought I'd made a bit of a mistake, but the reduction in coolant temps (about 5 degrees) was a nice bonus. The engine bay is quite a bit cooler too.

I've been thinking about spraying the headers with high temp paint, as they're silver and look quite out of place in an otherwise boring engine bay.

Yeah thats why my pacemakers were ceramic coated in black.

http://i614.photobucket.com/albums/tt226/zoomie_73/CeramicCoated1.jpg

Definately go black ceramic ...my engine is surprisingly much cooler and no rust

Yeah thats why my pacemakers were ceramic coated in black.


I had actually asked for them to be coated black; when they arrived, for the second time, along with the incorrect centre pipe, I gave up asking and bought a few cans of black VHT. Jerks.

ceramic coating as stated is in another league to wrapping. Wrapping allows heat to pass through the wall of the pipe as usual, and just keeps in the heat leaving the headers. USually creating large hotspots on th outside of the manfold, allowing for near melting temp both inside and out to occur, and sometimes leading to failure (jsut check out NS.com for cheap stainless manifold problems)

As far as i remember the chrome CC is stronger but is only reisistant to 700-800degrees where as the black is somewhere like 1100-1250degrees but fragile (not like a dinner plate, more like a toilet) you can break it relatively easily but only if your doing the wrong thing with it...

Hey all,i have a set of RPW race extractors here and i can't decide wether getting them ceramic coated will be worth the added cost ($300-$400),so i'd like to hear from people that have had it done and those who have experience in this area,keeping in mind the extra heat running on LPG produces.

thanks in advance guy's :)


Hey - what about a bonnet scoop if your worried about the heat or grills in the side to keep the air flowing through...

i got stainless steel HM headers and Im running LPG too - No problems with heat at all. I did at first when the lpg was out of tune dono why that is though, but now all good.

I dont think Ceramic coating makes a difference in the real world - havnt tried it with a magna, though have with a patrol and no difference LOL cant compare though.