Forge Wastegate Actuator question

[jmv]

i'll get pictures when i can, i don't have a camera at my apartment.

And, the past 2 days, the car has had a good vacuum reading, and has been running well. I see 18-19 in/Hg on the gauge, which corresponds to a reading of 22 in/Hg when i had hooked up to my vacuum pump... i know several people with the Stewart Warner 15 psi boost gauge that have had the same accuracy problem in the vacuum range.

Mod list is:
Mental Addiction SRI
Mental Addiction FMIC
Mental Addiction Hardpipes
Boostsciences Reflex Diverter Valve (bpv)
Forge WGA
Apex 2.5" Catted j/midpipe
Samco silicone vacuum hoses
Spal 12" and i think 9" slimline fans (9" on the front pushing, 12" on the back pulling)

I think thats it... lol, if i realize i forgot something i'll add it.

And, i dunno i'm fairly certain the WGA was the leak. Perhaps there is/was something else leaking as well, but when i hooked up the car without the wastegate to test the idle, the vac reading was what it normally was. It took me forever to realize the wga was actually leaking, because like you said it doesn't seem like it would be the source of problems if the boost side of things was fine, but it seems to have helped. I just need to figure out these fluctuating boost pressures.

I'll get those pics, possibly tomorrow.

 

[jmv]

Well, i got under the car and adjusted the WGA, made the arm two full (360 degree) turns shorter....

and i can't find any difference in the boost patterns. The car is running very well, nothing to indicate any leaks, just weird boost, and its kinda concerning that adjusting the arm didn't have any effect on the boost.

One thing i noticed, when i was trying to get the shortened arm attatched to the wastegate itself, all i had to do was pull on it with my hand that was up in that cramped space, and i could pull it out to go over the post. When i installed my ATP, it was way too stiff for that, and i had to get a pump hooked up to it to extend it in order to get it onto the wastegate. Is it possible theres a problem with the spring forge sent me?? I wouldn't think i would need the spring rated for 10-15 psi for any reason, but perhaps if there was a problem with the green spring that they sent me it would cause these issues....

anyway, got some pics.

Overall shot of the engine bay:

The wga and the line running to it:

Where that line going to the WGA originates, by the BPV:

A better shot of the BPV itself:

Here you can see the route of the BPV vac line past the belts, through the motor mount bracket, and over to the intake mani:

A more close-up shot of the intake mani:

And just a shot of the other side of the engine bay:

Does anybody see anything weird??

 

[Jaysanooch]

Remove the line going from the WGA to diverter valve hose and plug that up, seal it back up or replace it.

The vacuum line from the WGA should go directly to the Intake manifold...no more than 2.5 long. Then T off that same line and run another vacuum hose to go directly to your diverter valve.

I'm not familiar with the diverter valve you are using BUT either way you got it hooked up wrong.

p.s. You got the diverter valve all the way on the other side which makes it impossible to run a short vacuum line. That line should be alot shorter usually.

 

[jmv]

Well, the stuff that comes with the Forge WGA specifically says NOT to run it from the intake manifold. It claims it should be either straight off the compressor cover, or from somewhere in between the turbo and the intercooler, which is the way i have it hooked up now.

I don't see how the bpv could be hooked up 'wrong', its just exactly the same as it would be in a stock setup, but obviously longer hose and just no tee off to the wga. I do wish i could have the BPV over on the coldside piping, so there would be shorter hose back to the intake and shorter vac line to it, but i don't have the resources to know how to move that.

I mean, i'm not just trying to argue with you, but it seems to me that even though this isn't a 'stock' vacuum setup, that it should work fine...

 

[43975]

Run the WGA off the stock location on the Mani.
and run the BOV/ BPV off the brake booster line. I'm running my Forge WGA and ssqv off the stock locations. with no issues.
Also thanks for posting pics of your motor with the orange lines. I was going to do that as well, but after seeing yours I think I like black better, the orange doesn't pop as well as I would have liked.

 

[Jaysanooch]

Well, the stuff that comes with the Forge WGA specifically says NOT to run it from the intake manifold. It claims it should be either straight off the compressor cover, or from somewhere in between the turbo and the intercooler, which is the way i have it hooked up now.

Yes but for which set up though...for msp specifically?

I don't see how the bpv could be hooked up 'wrong', its just exactly the same as it would be in a stock setup, but obviously longer hose and just no tee off to the wga. I do wish i could have the BPV over on the coldside piping, so there would be shorter hose back to the intake and shorter vac line to it, but i don't have the resources to know how to move that.

Think about it...the way you have it hooked up, you want the flow to go >>intake manifold >>through the bpv >>to get to the WGA?? Not only is that hooked up wrong but by the time the pressure gets to the WGA...how do you expect to hold boost or reach optimal boost level.

For our set up, you want a direct route to the wga and the bpv is like a dead end(hold and release). You are presently using your bpv as a passage to send the vacuum to wga.

Anyway goodluck...I could be wrong but that's about all the energy I have on this right now. Send your pictures via pm to whomever you bought the wga from...see what they say. Or send the pictures to one of the countless guru's on hear....sometimes threads like these don't fall on there hands.

I mean, i'm not just trying to argue with you, but it seems to me that even though this isn't a 'stock' vacuum setup, that it should work fine...

It obviously isn't for the reason I mentioned above. Like I said goodluck!

 

[jmv]

I think you're misunderstanding the lines around the BPV... the line going to the BPV dead ends right at the top of the BPV, the line to the wastegate is a pressure-only line, coming from right off of the hardpipe where the pressurized air runs to the BPV.... its not a vac setup going to the BPV, then through the BPV and to the wastegate... they're separate systems.

I dunno if the instructions were specifically tailored for the MSP or not.

 

[stdntDrvr]

have you checked the lube inside the WGA? they have SOME lube there, but there could be more, imo...that might cause a boost spike? i don't know.

 

[jmv]

hmm. Thats a thought. I suppose if i don't hear back from forge at any point soon, i'll pull it off and try that.

 

[jmv]

After talking to a rep from forge, he thought it might just be that i didn't have nearly enough pre-load on the WGA... so i gave it 4 and a half more turns (6 and a half turns of preload total).... and i've got the exact same boost pattern, just about 1 psi higher... so spike to 6-6.5, hold at 5, taper to 3.

I wonder if it might be the way i have it connected to the boost pressure source. Does anyone know a way to go about getting a metal barb fitting attached to an intercooler pipe??