eyecandy

iTrader: (19)

I plan on sending many of my parts to DFW RX-7 Cook to get coated. At first I was just going to send the Turbo many fould, twin hot sides, and the DP. But then I got thinking I should maybe send the him some of the intake air piping like the Manifolds, efini pipes, compressor housings, etc.

I know I am going to send the exhaust side without question, but do you think its worth coating the intake side? Or put the money elsewhere? If you have or know anyone that has had the intake side components coated how do you feel about it, and any feedback?

Evil Aviator

I think that coating the intake components is a waste of money, unless you just like the look.

eyecandy

iTrader: (19)

Thanks for your thoughts, I am just not sure if it would be a notcable improvemnet. I am not doing it for the looks either, cause it would be a light grey (close to stock color, but lighter). So nothing special.

BATMAN

So u have first hand experience with this?

maxcooper

I'm trying it (UIM and LIM coated) on my latest setup. But it isn't running yet. And I am not sure how I would be able to judge the effect.

-Max

eyecandy

iTrader: (19)

Where are you getting it coated? And what else do you have coated?

BATMAN

Here is what BATMAN has coated:

UIM
LIM
Turbo snails
Exhaust manifold
DP, CB (soon MP with resonator)
Efini Y-pipe
Rotor face

I doubt anyone has out done him on ceramic coating

Evil Aviator

You can use George Spears of Spearco if you would like a reference.

Given the airflow rate and extremely poor thermal transfer of straight-wall tubing, a thermal barrier is not worth the money or trouble unless the car is raced professionally. George Spears' estimates for a thermal barrier are in the 4-5 deg F range, which is generally considered insignificant. However, by all means add a thermal barrier if you feel it is worth it. Afterall, it's YOUR car.

You would need to run the engine with both manifolds and compare Delta-T.

maxcooper

Okay, I'll swap the manifolds, You hold the weather steady.

-Max

BATMAN

I like to think that if one coats the inner walls of the manifold, it would smooth the surface out, thus reducing drag and turbulence.

A similar effect to what extrude hone is trying to accomplish.

Evil Aviator

Airflow increases from extrude honing are more from de-burring than from polishing. Polishing can even hurt the airflow in some cases. Polishing in the manifold downstream of the fuel injectors will cause fuel adhesion problems that lead to reduced efficiency.

Have you ever wondered why a golf ball is dimpled?
http://wings.avkids.com/Book/Sports/...r/golf-01.html