Twin Turbo '74 Duster

Jimmy said
Ceramic coating will run you about $300 for the set and you are still left with all of the bumps and irregularities that will restrict flow. I am on a shoe string budget trying to do everything myself and I can honestly say that I believe my manifolds would look exactly the same as yours, which is why the only thing I'm not welding and doing my self is the manifold. I'm starting out with SS mandrel bends, cutting and spot welding to taste then bringing them to a pro to put the seams in, may be around $600 by the time it's all said and done. The down pipe, exhaust, no problem, hack it up as long as it flows. Just my 2 cents, but when prine talks turbo, I listen, and mad darts politeness aside his twin turbo is the envy of the block and if hes not sure, u shouldn't be ether. Your honesty and quest for good info will keep you on the right track and I'm just being a pain in the ***, so good luck with the build and keep us posted!:-D

For flow restrictions I'm not concerned I'm running 1.75" primaries because it's what was on the scrap headers I had. So bumps and irregularities may create a bit of turbulence, but with the primaries being so large I have plenty of give/take for a large boundary layer.

I don't disagree with Prine on much of anything, he just functions on a different budget than I do.
I've read through mad darts build and he has very impressive welding/fab skills. And I'm sure he has been doing this a lot longer than I have which is why I ask what he isn't sure about. Saying you're not sure, but then providing now explanation won't help me learn.

I'm not new to turbos or anything of the nature. I'm a senior mechanical engineering student and just finished up fluids 2. If I have to i can tell you just how inefficient my headers will be. How ever through studies I've read the differences between mandrel tuned headers and a log manifold are negligible at the power levels I'm playing at.