| I am not aware of an equal length design that can withstand the the intense thermal extremes of insulators in our application, nor would I bet one would ever be developed. So what is the limiting factor here then? Is it impossible (fiendishly complex) to cast equal-length runner manifolds? I've never considered the effect of insulating the manifold after shutdown, but I wouldn't think it would make that big a difference esp if the standard common sence (or turbo timer) is used when shutting down. The manifolds are several pounds of very hot metal. The turbo timer expects to cool only the turbo bearings, while the manifold radiates heat into the engine bay. If the manifold can't radiate heat, it can only conduct it...much of it going into the turbos over the course of a long time I'm sure you can see the problem -- safe turbo cooldown times will be much longer than before, and the turbo timers won't expect it. P.S. Not sure what internal coating you are talking about, my manifolds are swain coated externally and that is supposed to work very well. Yes, I am thinking of swain coat, but on the inside of the manis, not just the outside. As I recall, there is a thermal barrier swain coat (put it inside) and a coating that helps heat to radiate quickly (put that outside).
- John
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19:08:26 06/19/06
