JustAFooL

iTrader: (45)

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?

88mmrocket

it will work fine.

JustAFooL

iTrader: (45)

That's all I needed to hear. I've just never seen anyone on here doing it. Thanks.

68II

I run a log manifold with a divided turbo and was told to knife edge the center and gasket match the flange to help with the air from hitting a wall so to speak.

stevieturbo

That makes sense, although best to use an open scroll housing.

Unless you have proper divided tubular headers/collector, it's pointless running a divided scroll

turbo6man

iTrader: (5)

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?????

stock48

iTrader: (17)

I run open logs with all my dived BW turbo's. I just knife edge the divider and blend the corners to a nice radius.

JustAFooL

iTrader: (45)

Can one of you guys explain this knife edge??

stevieturbo

Just look at the turbine inlet, it's self explanatory

68II

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.

a98ws6

iTrader: (48)

Pics of the knife edge.

a98ws6

iTrader: (48)

Ill be using this with a divided T6 turbo and 2 gates. This ok?

JustAFooL

iTrader: (45)

Pics say a 1,000 words. Thanks for the replies.