Extrude Honed Stock Rb25 Manifold Results

[R31Nismoid]

^^ exactly. I cant see how its ever going to offer much, same as Tomei GTR manifolds etc... when you look @ the tiny hole that exhaust goes through in the turbine housing, you can see where the restriction is

[wolverine]

^^ so extrude your turbine cover/s while you are at it.

in for a penny.....

Edited March 1, 2009 by wolverine

[tridentt150v]

I think we may be missing the point a bit. I know you get increased volumetric flow with a hone, but as you stated the turbine housing is the restriction. But I'm not so sure that you will use the extra volume, I think its more about having smooth [ie non turbulent] flow, and its this that offers the greatest benefit. The smoother the flow the quicker and cleaner it is. BTW I did my housing as well.

[wolverine]

additionally, the turbine is always the restriction but that doesn't stop us trying to get more gas more efficiently thru the turbine wheel whether by cams, cam gear changes, tuning, fueling, exhaust changes etc.

[ShiftyTys]

I have just had this done on my exhaust manifold and dynod etc with good result.. I'm running gtx3076. would you like results here.or new topic?

Edited April 14, 2012 by ShiftyTys

[MrStabby]

+1 trident and wolv. Yes, the turbine will be by far the most restrictive part of the exhaust, but its a restriction you want. Any other restriction before or after the turbine reduces its ability to do its job.

[N1GTR]

I have just had this done on my exhaust manifold and dynod etc with good result.. I'm running gtx3076. would you like results here.or new topic?

Where did the work for you?

[ShiftyTys]

Where did the work for you?

Same place as OP in this thread. Go to forced induction. Gtx3076 .82 + power porting... etc etc is name of thread I made.