Quote:
Originally Posted by Poodles
Depends if they're coating internal and external and the type of coating used. Also, there's sealers that should be used over the wrap to keep them from falling apart and this also stops them from acting like a wick.
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True, but i have been told from the fab shops that have built my products, that a lead cause to cracking of stainless is tightly wrapped headers, that the the general rule of thumb is to have the less possible overlap, and to not get it too tight as stainless needs to breath and absorb ambient air as it expands, it also moves alot and a pipe that is wrapped to tightly will prevent it from moving, also if one section has minimal overlap and one section is doubled up then that section will become hotter and expand at a different rate, having minimal overlap and consistanty tru out the wrapping process insures even expansion and "breathability" for the steel. i have seen the spray and im sure it does work great but ive been told to either light wrap or not wrap the headers to insure longevity , personnally ive tightly wrapped my overpipe with 50/50 overlap but it does not reach the same temps as primarys on a header. i didnt even wrap my header or coat it, there are no well know coaters here they have all been a joke. so we stick to wrap or sheilds.