Open flange on a divided turbo?
Open flange on a divided turbo? I'm running a GT45 on my build. I've never fabbed anything before and seen where people were taking the merge and putting it inside the flange and welding it from the top and bottom. Here is what I've done..
My hotside is 2" and didn't think that I could "stretch" the merge enough to cover the hole. I got on Columbia River and order a 2"-3" transition cone. I just plan on making the merge prior to the cone and fitting the 3" inside the flange.
Is their any problems with doing this? I'd really like to do it this way as opposed to having to run a wastegate off each bank. Opinions?
My hotside is 2" and didn't think that I could "stretch" the merge enough to cover the hole. I got on Columbia River and order a 2"-3" transition cone. I just plan on making the merge prior to the cone and fitting the 3" inside the flange.
Is their any problems with doing this? I'd really like to do it this way as opposed to having to run a wastegate off each bank. Opinions?
9 Second Club
Joined: Nov 2003
Posts: 13,616
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From: Norn Iron
Unless you have proper divided tubular headers/collector, it's pointless running a divided scroll
I have searched this subject and not gotten a good answer. I would really like to know the difference myself because I just converted my t4 setup to an open t6. The turbo housing I got is a twin scroll. I really do not want to modify the flange to a twin scroll and then re arrange my wastegate pipe to go to both sides unless there is a big difference in spool up/ performance. Anyone ever tried it both ways to see the difference?????
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On The Tree
Joined: Aug 2013
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When you are looking at the flange on the turbo it has a divider down the middle. Just take a deburring bit and turn it into a thin gradual edge similar to a knife with the cutting edge facing you instead of the 3/4" wide obstruction down the middle. Then roll the perimeter so there are no flat areas to disturb the air.
