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Relief Valve Tuning?


erk1983

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i installed my relief valve yesterday and have been trying to tune it correctly since then.. it is a single piston non horn type without vaccum lines.... it is a greddy relief valve... i have been playing with it and cannot find where it should be.. does anyone have a blowoff similar to this that could give me some tips?

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yes it is still spiking and i cant hear any blowoff when i let off the throttle!!

i have been driving around town all day just making small adjustments and cant seem to find where it should be!!!

do you have any suggestions?

Well, after reading the site, please correct me if I'm wrong but:

Use the GReddy Relief Valve as a secondary boost safety device. By adjusting the set screw you can control the release point (from .08 kg/mm2 to 2.0 kg/mm2),

I interpret that it is used to control the boost level, not intended to release any air when you let off the throttle. It should only control boost levels.

Do you have any other form of boost control aside from that release valve?

What exactly are all your modifications?

I take it this is the right product

RELIEF.JPG

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My thoughts on that would be:

It vents boost if it exceeds X psi, since it's a secondary boost safety device, not a blow off valve or a boost controller.

You could have it hooked up wrong, but who knows?

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Spiking is something one must learn to live with on these turbos, our wastegate size is rather pathetic, not to mention the fact that it is internal... How badly is it spiking?

Kevin... sorry I can't join you in going off topic on this thread, I will join the next one :D

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thank you for your input i guess i will have to purchase a BLOWOFF VALVE , since that is not what i have....

does anyone have any suggestions on what type of blowoff to use? i have looked at baileys motosports dump valves but i wonder if there is anything in the u.s. that would be a little cheaper?

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That is a pressure relief valve, not a blow off valve.

It is designed to prevent overboosting to save your engine. You set it to the MAX psi you ever want the engine to see, say 20psi. Then if it does it's job it should do NOTHING until the boost hits 20psi, then it will just open enough to vent the excess pressure.

It's a safety device in case a hose pops off or some other disaster happens where your boost goes out of control.

You still need a blow off valve. The pressure relief valve is totally seperate and works completely different.

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That is a pressure relief valve, not a blow off valve.

It is designed to prevent overboosting to save your engine. You set it to the MAX psi you ever want the engine to see, say 20psi. Then if it does it's job it should do NOTHING until the boost hits 20psi, then it will just open enough to vent the excess pressure.

It's a safety device in case a hose pops off or some other disaster happens where your boost goes out of control.

You still need a blow off valve. The pressure relief valve is totally seperate and works completely different.

Yay, Greg and I are on the same page! :D

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