Maxflow Race Bypass Valve fluttering

[Nodster]

OK so some more 5k and 6k rpm pulls in various gears. And yep, fluttering when decelerating.

Beefcake sent me a price for the maxflow race valve. Which they said flows more cfm. And is considered an upgrade.

Will I have any problems if I push the button now. Will it be a straight swap. I'll make enough boost pressure for the valve to open yeah haha? I don't want to buy it if it won't work!

Thanks.

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[Cory S]

OK so some more 5k and 6k rpm pulls in various gears. And yep, fluttering when decelerating.

Beefcake sent me a price for the maxflow race valve. Which they said flows more cfm. And is considered an upgrade.

Will I have any problems if I push the button now. Will it be a straight swap. I'll make enough boost pressure for the valve to open yeah haha? I don't want to buy it if it won't work!

Thanks.

The valve CLOSES under boost........

 

[Nodster]

The valve CLOSES under boost........

I thought when you decelerate and the the throttle body closes that the excess pressure is diverted out the bypass valve to give you the whoosh sound? But I'm getting fluttering because it's not escaping and is hitting the blades? Is that not right?

 

[Cory S]

I thought when you decelerate and the the throttle body closes that the excess pressure is diverted out the bypass valve to give you the whoosh sound? But I'm getting fluttering because it's not escaping and is hitting the blades? Is that not right?

When you lift off the throttle, vacuum is created in manifold, and the vacuum signal line pulls open the valve.

 

[Nodster]

When you lift off the throttle, vacuum is created in manifold, and the vacuum signal line pulls open the valve.

Cool, and then it should vent to atmosphere? But with a woosh not a flutter?

 

[Cory S]

Cool, and then it should vent to atmosphere? But with a woosh not a flutter?

Depends where the valve is. If its before the MAF, it can be vented to atmosphere yes.

 

[Nodster]

Depends where the valve is. If its before the MAF, it can be vented to atmosphere yes.

Yeah it is.

 

[SheepDog]

I don't know about this specific situation, and Cory is VERY knowledgeable. That being said, having a decent amount of experience in the Superduty diesel world, surge is a bad thing. It is rapid pulses in compressor speed. Think slamming on the brakes, then speeding up, then slamming on the brakes, over and over again, very rapidly, which can absolutely be damaging to the compressor bearings over time.

I think it is even worse for a Centri. The impeller in a turbo can quickly accelerate/decelerate, whereas the supercharger is just going to continue to spin at whatever speed the engine is driving it, even when compressed air is being slammed back into itself

 

[Nodster]

So do we think swapping out the valve is the best course of action here to try and cure the problem?

 

[cbrtrx]

So do we think swapping out the valve is the best course of action here to try and cure the problem?

Yes you need a larger valve that can flow much more cfm. I'd recommend the vortech bv57 or a tial 50mm. The other vortech valves really don't flow that well.

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