Quote:
Originally Posted by zooki
You have to remember though, that you're bolting this to an aluminum motor, which will expand & contract as it heat cycles. Being an opposed layout instead of a Vee or inline setup, the exhaust ports will move away from each other more than the other configurations. Is it enough to fatigue the metal of the header? Don't know, but it WILL move.
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I understand heat expansion but it would have to be less than a .010 of a inch probably less than.001 in reality if it did some crazy expansion that it would take to damage anything the motor would leak oil and coolant like a siv. Head gaskets would blow everytime it got hot and the bearings would fall out so I cant see that being a factor. Im not trying to be disrespectful or take a jab at you Im just putting my opinion out there
After reading your post about 10 times I realized your talking about the header ports moving not the engines that I can buy into to some degree..