Turbo Merge Collectors?
 

If I was to cut and swap the merge collector on an aftermarket 930 header, so I can use a T4 turbo on it, who sells the best merge collectors?

Also, if anyone knows off the top of their head, what's the part # that will suit a 930 application?

Burns Stainless? I think they're the best, from what I've heard. Be prepared to spend a few hundred for one tho :confused:

I take it I'd need a 3 into 1 merge collector? One is for the wastegate pipe?

You might also consider talking to Ben of M&K exhaust. His handle on here is MB911 as he is a welder and has did similar to his own exhaust with adding the T4 flange.

Burns are, hands down, the best AFAIK. Burns Stainless Their collectors are designed with ultra expensive CFD software and are about as nice as it gets. As far as a part #, I really don't know. You'd have to measure your setup to determine what size/length will best work.

Again, Burns Stainless. You won't find a finer collector anywhere. Download their X-design form and fill out the necessary information. they will build a collector to suit your application that will be second to none. Be prepared for a hefty bill(~$2000+) for anything made in 321 stainless and TIG'ed by them for a pair of header collector and a turbo collector.

Your merge collectors on the headers (each side) will be a 3-1 style, your turbo collector will only have two inlets, one for each side, and they can factor in a dump to attach a wastegate flange to it if you'd like to have an equal pressure dump(to equalize exhaust pressure in each manifold, unlike stock 930/965 setups).

Talk to Vince. Great guy and he'll get you what you need....

I was quoted $356, which is a T4, 2-1 merge collector.

Sorry I was thinking he simply wanted to convert the T3 to T4 with increased efficiency. If you have an off the shelf header, I wouldn't think a $2000 collector is appropriate. If you have custom quality made headers then I agree that Burns has little rival in headers/collectors of any sort.

Luke, I'm planning to cut up a set of off-the-shelf 930 turbo headers so I can fit a T4 turbo to it, so that's the reason why I want a 2->1 merge collector with T4 flange to replace the T3 one on the 930 headers.

There is no way in hell I'm paying USD$2k for all new merge collectors. I'd rather have a custom set of 1 5/8" headers built locally for that price :eek:

I understand now.......you can also try Woolf Aircraft. Woolf actually supplies Burns with all their material, and produces off the shelf collectors too. http://www.woolfaircraft.com/ ALOT cheaper than Burns.

I've tig'd up headers before to accept T4 turbine flanges. Nothing as fancy as Burns, but get the job done efficiently. I should have made a jig for that setup. Shouldda wouldda couldda as they say :( If you're handy with a tig, or even mig, it's actually not all that hard to do yourself. I believe Woolf even sells pre-swagged mandrels so that you can make a factory slip joint style collector that will seal positive and expand with head so it doesn't stress and crack over the thermal cycles :) Fun stuff...