How much HP from Porting FP Red
Usually turbine housing porting works by reducing the pressure on the outlet side. Thus, porting the turbine outlet, or exducer discharge area improves the pressure differential between the turbine's inlet area and its outlet area. You want increased pressure in and reduced pressure out.
However, the 16G turbine housing's twin scrolled inlet aera is quite restrictive to begin with. Ultimately, to maximize flow through the housing, the inlet area becomes a restriction.
So, this is why 9sec9 fully hogged out the turbine inlet area of the 10.5 housing eventhough this goes against conventional wisdom regarding the pressure differential.
What am I getting at? To fully maximize power with the restrictive 10.5 housing you have to fully hog out the turbine inlet area of the housing eventhough this screws up the pressure differential.
So, to realize the gains from fully hogging out the turbine inlet area, Mikey will have to increase boost pressure, so as to increase turbine inlet pressure. So, it will be difficult to see any significant power gains if boost pressure remains constant before porting vs. after porting. He'll have to crank the boost up. But, then all other things would no longer remain equal.
However, the 16G turbine housing's twin scrolled inlet aera is quite restrictive to begin with. Ultimately, to maximize flow through the housing, the inlet area becomes a restriction.
So, this is why 9sec9 fully hogged out the turbine inlet area of the 10.5 housing eventhough this goes against conventional wisdom regarding the pressure differential.
What am I getting at? To fully maximize power with the restrictive 10.5 housing you have to fully hog out the turbine inlet area of the housing eventhough this screws up the pressure differential.
So, to realize the gains from fully hogging out the turbine inlet area, Mikey will have to increase boost pressure, so as to increase turbine inlet pressure. So, it will be difficult to see any significant power gains if boost pressure remains constant before porting vs. after porting. He'll have to crank the boost up. But, then all other things would no longer remain equal.
Last edited by sparky; Mar 3, 2010 at 06:21 AM.
why did you not post that **** from jump street sparky damn dude you knew the answer yet you let it carry on 14 mindless pages. no boost increase your not going to see the true benefit end thread you let me down finally and i did not think it was possible till now
Rock: I wouldn't do that to you, buddy. This porting project of Mikey's has perked my interest. Everyone's posts including yours and Mikey's have forced me to reevaluate my limited understanding of this theme. This thread has helped me to evolve...even at my old age. I am really enjoying this stuff.
I hadn't fully formed my conclusions when the thread started. I have just been really into this thread and I don't claim that my views are gospel by any means. They are just my observations. I have no empirical data to back up my assertions either.
This thread got me to do a little research online and that's how I found out about this "pressure differential" thing. Mikey has always felt that the secret to power production with the 16G is in the turbine side. I agree up to a point. There have been two or three significant improvements to the 16G compressor housings. The first major improvement was the Mitsu IX compressor housing which was a clear upgrade compared to the VIII comp housing. Then Tomei redesigned the IX housing. Finally, Forced Performance came out with the 80mm anti-surge compressor housing for the 16G.
Point being that there have been significant improvements to the 16G's compressor housing, BUT, we are still running the same dinky 10.5 A/R turbine housing. This housing has really done all that it has been asked to do and more. However, it is time for a new 10.5 turbine housing design.
I hadn't fully formed my conclusions when the thread started. I have just been really into this thread and I don't claim that my views are gospel by any means. They are just my observations. I have no empirical data to back up my assertions either.
This thread got me to do a little research online and that's how I found out about this "pressure differential" thing. Mikey has always felt that the secret to power production with the 16G is in the turbine side. I agree up to a point. There have been two or three significant improvements to the 16G compressor housings. The first major improvement was the Mitsu IX compressor housing which was a clear upgrade compared to the VIII comp housing. Then Tomei redesigned the IX housing. Finally, Forced Performance came out with the 80mm anti-surge compressor housing for the 16G.
Point being that there have been significant improvements to the 16G's compressor housing, BUT, we are still running the same dinky 10.5 A/R turbine housing. This housing has really done all that it has been asked to do and more. However, it is time for a new 10.5 turbine housing design.
Last edited by sparky; Mar 2, 2010 at 09:21 PM.
^ Sparky. Thanks for your input for me and others. This is something that Eric and I have already thought about. The truth is we may not see to much power from 30psi, but the hope is to lose of tq and spool that I have room to turn the boost up and still not go over 450tq. Things may not be 100% equal but we will do a direct swap changing nothing but the housing just to see. Then we will turn boost up. I know how much hp I was making per psi before so I can tell after the port work if it helped. Also, our findings will be 100% laid out to everyone. Good or bad, the evo community has a right to know.
Also I still have not talked to tom. When you say hogged, what do you exactly mean by that? How much did he take out?
Mikey
Also I still have not talked to tom. When you say hogged, what do you exactly mean by that? How much did he take out?
Mikey
Mikey: I have spent about 5 hours searching old EvoM threads trying to find Tom's pics of his ported turbine inlet area, however I have not been able to find those pics, Sorry, buddy!
Mikey and Erik are right in expecting to lose some spoolup and low end torque. But, I think that they should start to see gains in power earlier than 30#, anywhere above 25 PSI, I'd guess it'll start to hum.
aaron
This obviates the need of me having to yank the turbine housing off my car and shooting pics, etc.