IM & VC Question

[_-Night-Shade-_]

I've always wondered this. Would sand blasting and powdercoating/painting the intake manifold affect the flow of air through the manifold or change the natural resonating frequency of the manifold thereby throwing off the VRIS points a little? And for VCs, do you guys powdercoat just the exterior portion or the inside of it as well?
I have a feeling the more technical guys like wytbishop will jump on this one

[solo_ryder]

Well I cant really answer the first one, but usually the only really blast the outside so I would say no.

As for the vc, they blast both sides and powdercoat the top only, they tape off the bottom. At least in my case.

[Ryan]

To some infinitesimal degree, yes.

Remember its the whole motor vibrating. The I/M is a fairly rigid structure as well. Its not like shaking different consistency jello, its like shaking a brick versus shaking a painted brick.

The common arguement is that it holds heat in, and warms the air, which we all know is bad...

[Nd4SpdSe]

The resonance doesn't affect the VRIS, that's the air flow path. The resonance system is mostly do to with the sound of the motor. If you've put on a CAI, you've already changed it massively, so I wouldn't worry about it.

Indeed, Ryan is right, it'll ask as an insulator, but many have painted/powdercoated IM's, so it depends on how serious you are towards performance.