SwishaSweet

iTrader: (10)

so i just installed a fpgreen, br ported mani, br sheetmetal o2 housing, FORGE WGA and 780 injectors.

The car spools nice and fast then only hits 16-17 psi then really slowly builds to 24 psi. Runing off just the Forge wastegate no MBC

I want to hit like 25 psi then slowly taper down but im not gettin smooth consistant boost just hittin 16 psi fast then then slowly building to 24 psi.

I think the WGA actuator must be junk but its all brand new parts.

So its eather the o2 housing the WGA or my flapper is cracked and dosnt seal.

What do you guys think ?

im making 355hp and only 310 tq as is lets get this fixed so i can put down some power.

SwishaSweet

iTrader: (10)

oh yeah i already tryed like 6 differnt WGA tightnesses

SwishaSweet

iTrader: (10)

some one has to know something

Boosted Tuning

iTrader: (12)

Boost creep. You most likely need to enlarge the wastegate hole on the O2 housing to eliminate it.

Had same O2 housing, had to enlarge the whole to eliminate boost creep on my RED setup.

BluEVOIX

iTrader: (69)

To get this straight your running straight off the forge wga with no boost controller?

Forge uses different types of springs for boost pressure. What psi spring are you running?

Only thing I can think of is that, your wga has a small spring the one rated for 10-15 psi. When your setting a high preload, your able to increase the max spring boost pressure ability to 16-17 psi, however you are decreasing the range of how much the wga can open the wastegate. So in the low rpm range its over preloaded setting is enough to allow enough exhaust to pass through. But as rpms and exhaust pressure increase, the wga cant open as much as it should and the exhaust that is supposed to pass through the wastegate reroutes and spools the turbo.

I had something like this happen to me where I was running off a wga and preloaded way too much. Mine was the FP 25 psi wga, it would hit 24-25 psi but then climb to 29 psi as I approached redline. Similar to how we have boost creep with aftermarket o2 housing that have too small of a wastegate merge hole. If its not the wga then its boost creep from the o2 housing merge hole being too small and the forge spring is too small to boost to 24-25 straight boost source no mbc.

Double check the spring in the forge waste gate. If it is the smaller spring then this is your issue.

I'm curious as to how hard is it to pull the wga arm and attach it to the flapper? Can you do it by just holding on and pulling? My FP 25 psi wga, there is no way you can pull the arm. I have to use 2 wrenches, sandwiching them on the arm nut and pulling that way. The FP 18 psi spring that I also have is duable if you have a strong grip on it, but the 25, no way while the turbo is on the car.

SwishaSweet

iTrader: (10)

Its the forge WGA for the evo 9 idk what sping is in it right now but i know it should be a red like 22-25 psi

SwishaSweet

iTrader: (10)

You can pull on the WGA ARM with your bare hands. Im just gunna pull then thing off the car and see what springs in there.

SwishaSweet

iTrader: (10)

I just hope its not the flapper on the turbo.

sparky

iTrader: (1)

Just tighten that turnbuckle end on the actuator rod. Give it about 3 full rotations to start with.

sparky

iTrader: (1)

I notice that you have an Evo IX. So, do you have the stock IX actuator still? Or did your Green come equipped with an FP actuator? You could try one of these for comparison's sake.