The flange on my log manifold is beginning to warp. I read in one of those highly recommended turbo books that it's a good idea to cut the flange in the middle to allow for expansion and contraction. Anyone have any thoughts on this? I was thinking about cutting it like the stock manifolds are. It looks to me like the bolt pattern was designed to allow something like this, since there are two bolts in the middle.

 

Sounds logical... and I can't see how it would hurt.

Bill

 

I cut all of mine there. And I drill all the holes over sized to allow for expansion.

 

Do you drill both the front and rear holes? I'm assuming you just elongate them? How bout the middle hole?

 

... heh... this week is good for a beer Although, if you're like a bud of mine... he is working on his thesis. Lemme know... Four Peaks Beer bread Chicken Wrap... with the scenerary is lookin' real good right now

Bill

 

everyweek is good for a beer

 

I drill all the holes to 13/32 or so. Give it plenty of room to move around. SS has a very high expansion rate when compared to aluminum and steel. That's why manifolds built out of thiner SS tend to crack a lot.