Forged WG and Perrin 3 port Test w/Data
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From: Gillette Wyoming
Forged WG and Perrin 3 port Test w/Data
Okay today I got off my *** (at work) and installed my Forged WG and Perrin 3 port. Super easy to install, took 30 mins to do. Hooked up Ecuflash adjusted my WGDC Passive to 0 and reactive to 65% less. So after all that stuff, I went to lunch and did some logging and was hitting 28psi (Im fine with that I was tuned for about 26-27psi with stock setup at the time) so it was close to what it was with stock setup. So I tuned it to how I wanted to be and what to hold. I did preload WG just little not much, I would say less than stock maybe the same. What I did notice was I was holding A LOT better boost at redline 2-3psi.
Well Im finding out also when I was out tuning (even with Dp open dump) my BOV is fluttering. Reason I know this is logging showing no knock or anything of the kind and you can hear my DP that VTA flutter with it but boost is showing okay. If BOV opens some it will shut the WG making it very quite in my car lol. So I know it is fluttering. (waiting on guys price so I can buy Better BOV)
If you go through the gears you don't have any problems, only under a big load when tuning 3rd/4th.
Okay here you go for the Data everyone loves.
Okay RED is with Forged WG and Perrin
Blue is with the stock WG and the screwed in all way.
Green is Bone stock WG no turns or anything.
So I would say yes everyone need this. But also you have to TUNE for it too or it will go booooooommmmm...Thanks guys!
P.s. I know this has a lot to do with tuning and might need go under tuning, Mods your call...
ALSO EVEVATION: About 5000' feet.
Well Im finding out also when I was out tuning (even with Dp open dump) my BOV is fluttering. Reason I know this is logging showing no knock or anything of the kind and you can hear my DP that VTA flutter with it but boost is showing okay. If BOV opens some it will shut the WG making it very quite in my car lol. So I know it is fluttering. (waiting on guys price so I can buy Better BOV)
If you go through the gears you don't have any problems, only under a big load when tuning 3rd/4th.
Okay here you go for the Data everyone loves.
Okay RED is with Forged WG and Perrin
Blue is with the stock WG and the screwed in all way.
Green is Bone stock WG no turns or anything.
So I would say yes everyone need this. But also you have to TUNE for it too or it will go booooooommmmm...Thanks guys!
P.s. I know this has a lot to do with tuning and might need go under tuning, Mods your call...
ALSO EVEVATION: About 5000' feet.
Looks good. Thanks for providing the data, I think GST provided a graph that showed these same things at one time.
Also it is Forge Wastegate.... Forged is a company.
Good job.
Also it is Forge Wastegate.... Forged is a company.
Good job.
Quotes:
Originally Posted by Mike@Forge
19-24 PSI base spring pressure is standard, but a 14-18 PSI spring is optional.
The units are still manually adjustable like the stock units within the respective spring pressure range.
Due to the positioning of the wastegate flapper within the exhaust housing of the turbo, the exhaust gas pressure is directed staight against it, which can easily cause it to open prematurely thus limiting boost.
The housing is cast differently from the 8 and 9 turbos. On those exhaust housings, the flapper is positioned laterally to the exhaust gas flow, whereas on the X housings, it's more inline with the flow, so the problem is a little worse on the X's, so the benefits from the upgrade are more substantial.
The units are still manually adjustable like the stock units within the respective spring pressure range.
Due to the positioning of the wastegate flapper within the exhaust housing of the turbo, the exhaust gas pressure is directed staight against it, which can easily cause it to open prematurely thus limiting boost.
The housing is cast differently from the 8 and 9 turbos. On those exhaust housings, the flapper is positioned laterally to the exhaust gas flow, whereas on the X housings, it's more inline with the flow, so the problem is a little worse on the X's, so the benefits from the upgrade are more substantial.
Originally Posted by Mike@Forge
As I said earlier, the higher spring pressure within our unit allows for the wastegate flapper to be held closed tighter and for longer against the exhaust gas pressure flowing through the turbo.
With the weaker spring of the stock unit, as well as the poor placement of the wastegate flapper within the exhaust housing, the exhaust gas pressure can easily force the wastegate flapper open prematurely. When this occurs, the exhaust gas that is supposed to be spooling the turbo is dumped which will slow the speed of the compressor wheel and limit the potential to build boost further.
Tightening the stock unit will have the same effect as ours, as many people are finding, but to a much lower degree. You're working with an altogether weaker spring to begin with. Somewhere in the neighborhood of 12-15 PSI base pressure.
We assemble our units with a 19-24 PSI base spring pressure, so the possibility of the exhaust gas pressure prematurely opening the flapper against this higher spring pressure is minimized, if not completely eliminated.
All of the exhaust gas is kept within the exhaust housing of the turbo and is forced to continue spooling the wheels keeping boost at it's peak potential.
A boost controller will still allow you to adjust up from the base actuator spring pressure, and it will open the actuator when the target boost pressure is reached, but with the stock unit, there is still the potential for the exhaust gas pressure to prematurely open the wastegate BEFORE peak boost is reached and the boost controller would send the signal to open the actuator.
With our unit, the boost controller will still function in the same way, sending the pressure signal to the actuator to open it fully when the target boost level is reached, but there is far less chance of the exhaust gas pressure opening the flapper before that occurs.
Depending upon how the units are adjusted, you will see changes like quicker spool, less tapering, and an overall increase in the area under the boost curve. The units are piston based, and fully rebuildable. They carry a lifetime warranty.
With the weaker spring of the stock unit, as well as the poor placement of the wastegate flapper within the exhaust housing, the exhaust gas pressure can easily force the wastegate flapper open prematurely. When this occurs, the exhaust gas that is supposed to be spooling the turbo is dumped which will slow the speed of the compressor wheel and limit the potential to build boost further.
Tightening the stock unit will have the same effect as ours, as many people are finding, but to a much lower degree. You're working with an altogether weaker spring to begin with. Somewhere in the neighborhood of 12-15 PSI base pressure.
We assemble our units with a 19-24 PSI base spring pressure, so the possibility of the exhaust gas pressure prematurely opening the flapper against this higher spring pressure is minimized, if not completely eliminated.
All of the exhaust gas is kept within the exhaust housing of the turbo and is forced to continue spooling the wheels keeping boost at it's peak potential.
A boost controller will still allow you to adjust up from the base actuator spring pressure, and it will open the actuator when the target boost pressure is reached, but with the stock unit, there is still the potential for the exhaust gas pressure to prematurely open the wastegate BEFORE peak boost is reached and the boost controller would send the signal to open the actuator.
With our unit, the boost controller will still function in the same way, sending the pressure signal to the actuator to open it fully when the target boost level is reached, but there is far less chance of the exhaust gas pressure opening the flapper before that occurs.
Depending upon how the units are adjusted, you will see changes like quicker spool, less tapering, and an overall increase in the area under the boost curve. The units are piston based, and fully rebuildable. They carry a lifetime warranty.
Forge is the company who makes his WGA.
http://www.forgemotorsport.com/conte...1&catalog=0001
I have a brand new one for sale if anyone's interested.
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I'm getting the same results with the GST boost pill upgrade and the stock solenoids. Even more boost at redline (20psi), depends how my mivec is set up.
However, my elevation is right around 500ft.
However, my elevation is right around 500ft.
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Whitewind, have you tried varying boost levels to see if you make more power with more boost? I'm curious about the efficiency of the stock turbo at high elevations. Would be interesting to see if power kept going up as you increased boost, or if at some point you lost a bit of power due to the turbo working too hard/hot.
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From: Gillette Wyoming
Well im only on 91oct with some special spice in there. Man I'm going lower boost down and run some more timing and see but don't know when I will be able to do this.
My BOV was opening up during spool... i.e. it couldn't hold the boost. Right now I am running a Forge BOV that I believe is designed for DSM's. I got it free, and so far it works great. I wanted to replace it, but I have no reason to. I have 0 issues with my BOV. It's set to full recirc.
My BOV was opening up during spool... i.e. it couldn't hold the boost. Right now I am running a Forge BOV that I believe is designed for DSM's. I got it free, and so far it works great. I wanted to replace it, but I have no reason to. I have 0 issues with my BOV. It's set to full recirc.
my GM 3port is at full duty cycle and the wastegate appears to be having some difficulty holding boost towards redline, although I admittedly have not played around with the actuator preload at all.