POWDER COATING INTAKE
10-21-2011, 08:43 PM
#16
Send Roger an e-mail roger@928sRus.com and he'll tell you exactly what you will need to do it properly.
10-21-2011, 09:11 PM
#17
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10-23-2011, 11:31 PM
#19
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When powder coating, the holes for the fuel injectors should NOT get masked .... the coating is part of the final dimension.
Also, when you get the intake back, check the flatness of the bottom surface. My manifold warped a bit from the heat and resulted in an intake leak that whistled when I started it the engine. I had to take it apart again and mill a thin layer off to make it mate properly.
Also, when you get the intake back, check the flatness of the bottom surface. My manifold warped a bit from the heat and resulted in an intake leak that whistled when I started it the engine. I had to take it apart again and mill a thin layer off to make it mate properly.
10-24-2011, 03:26 AM
#20
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If it is an 85-6 with the sandoffs be sure to use anti seize when putting the bolts back in the cam covers. I do them myself. A gun and old over are not that costly.
The manifold is porous. I have tried filling the voids with Metal Lab but got some reactions. The best I have done is two coats of the base followed by clear. Three bakes. I have also used the powder coat primer to get a fill before the base. It can be sanded. There is a company that sells pearls to add to the powder coating for about $10 a package. Silver with some silver pearls might make an interesting and subtle combination.
One other thing that Dave recommended was to bake the raw manifolds and wash them in Phosphric Acid a couple of times to get any oil that has soaked into the metal.
The manifold is porous. I have tried filling the voids with Metal Lab but got some reactions. The best I have done is two coats of the base followed by clear. Three bakes. I have also used the powder coat primer to get a fill before the base. It can be sanded. There is a company that sells pearls to add to the powder coating for about $10 a package. Silver with some silver pearls might make an interesting and subtle combination.
One other thing that Dave recommended was to bake the raw manifolds and wash them in Phosphric Acid a couple of times to get any oil that has soaked into the metal.
11-09-2011, 08:34 AM
#23
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Home powder coating is a viable option. All you need is a cheap powder gun and a used electric oven - gas will not do it. Prep is the biggest part of the job. I find two coats of color followed by clear to be the best. There is also a primer sold by Columbia Coating that can be used to prep the covers and manifolds. It can be sanded to give a nice finish. I had bad luck using Metal Lab. It reacted with the manifold and tainted the color coat. it is also almost impossible to sand.
One thought I have not tried is to metal spray the manifolds first. It might be possible to metal spray them with aluminum and then polish them. Like I write I have not tried this but it is worth looking into given the condition of the metal.
