Couple of question!!!!

[ADD]

Got a few questions if someone could answer them for me:
1) What would happen if the EGBV or IACV actuator sticks when changing gear?
2) If i had a leaking wastegate, what effect would it have on boost,afr's and performance at full chat?

cheers for any help
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[Ian C]

1) What would happen if the EGBV or IACV actuator sticks when changing gear?


Sticking open or closed, and is this changing gear while tootling through town or a full on blast through the gears? It makes quite a difference which :)


2) If i had a leaking wastegate, what effect would it have on boost,afr's and performance at full chat?


Do you mean the vacuum reference leaking (it'd act like a bleed valve and boost would go up) or an exhaust gas leak before or after the wastegate?

-Ian

[ADD]

1) Regarding Actuators, its sticking iopen on full chat

2) Vacuum reference side. and what if the spring was becoming weak?

[Ian C]

1) Regarding Actuators, its sticking iopen on full chat


You should still come back on at full boost, if these stay open they would only cause trouble at <4000rpm, you'd lose all boost on turbo 1.



2) Vacuum reference side. and what if the spring was becoming weak?

If the vac ref leaked as I said it'd be like a bleed valve, so boost would go up. If the spring got weak, the wastegate would open easier to theoretically boost would go down - although of course we know the integral wastegate in the stockers can't control boost much at all once you decat, so under those circumstances you'd get a slower buildup of boost as the wastegate opens early.

Both a vac reference leak and a weak spring at once might just cancel each other out ;)

-Ian

[ADD]

You should still come back on at full boost, if these stay open they would only cause trouble at <4000rpm, you'd lose all boost on turbo 1.



If the vac ref leaked as I said it'd be like a bleed valve, so boost would go up. If the spring got weak, the wastegate would open easier to theoretically boost would go down - although of course we know the integral wastegate in the stockers can't control boost much at all once you decat, so under those circumstances you'd get a slower buildup of boost as the wastegate opens early.

Both a vac reference leak and a weak spring at once might just cancel each other out ;)

-Ian

Thats brilliant thank you Ian, ya certainly know ya stuff!!
Sounds like my crank pulley is on its way out so im gonna get that changed then i can send you through my data log.