Gotcha I read a post somewhere that said the later manifolds were bigger for a 701. I guess not. But yeah thats what im going to do, try and match it. Its worth a shot since the pipe was basically free. My machine shop is a local old timer in my area who does mainly car motors, and my pops is...
Thanks, I measured it and its only 42mm on the coffman. 47mm might be a squeeze with how close the water jackets are but Im about to see this morning when I take it in
Interesting thread, thanks for the response and tips. Im going to take the manifold and head pipe to my machinist tomorrow and see how much he can machine out to match.
Yeah I drilled out the stock manifold to 10mm bolts back when I did the conversion. I just bought thread inserts to go down to 8mm so I dont have to drill out the coffman manifold.
So I have a 1990 superjet with a 61x single carb bottom that I grinded out to accept some 64U 760 cylinders. Ive been running it like with stock 61x exhaust for years now and its been ok, but Im going for more power and I have a full coffman exhaust off a 650 and want to put it on the 760. From...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.