Maybe it's too late but I primed my newly blasted intake manifold with primer rated at 170 degree max. Does anyone know how hot these straight 8 intakes get ? It's a stock 263 engine.
I recall regular enamel paint is good for about 300 degrees. That's what I was going to use as a top coat.
I really don't want to strip off the primer so I may find out directly when the car gets running again. Thanks guys !
1970 GS455 Stage1 Race weight 4025 lbs.
TSP 470, 602 HP, 589 TQ
MT headers, Gear Vendors Overdrive
Best E.T. 11.54 Best MPH, 116.06
1998 Riviera SC3800
No, the 2 intakes are separate except where the heat riser joins them. That's probably where the paint would burn off first. I topcoated the intake today with a tough but not a high heat chassis enamel from Bill Hirsch. I'll know if it cooks off in a month or so when I fire it back up !
I think I would strip the primer and redo it. 170 degrees is just not going to make it. Under hood temperatures on a hot day can get at least close to that. Definitely the carb heat area under the carb will.
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You're probably right. I was rushing to keep the newly blasted iron from flashing and impatience got the best of me. I have an adjustable range heat gun and an IR temp gun so I might try to "duplicate' a hot engine and see what happens. The manifold won't fit in the wife's oven, not that she's let me use it anyway.