Atomic

iTrader: (42)

Yea that looks like the same thing but with a bigger hole. I wonder if the maggy is nornally closed instead of open like the whipple?

Vortec350ss

iTrader: (20)

In vacuum the blowoff is open. It closes when there is no vacuum between the rotors and throttle body.

03sierraslt

iTrader: (22)

Engine off its closed.

Atomic

iTrader: (42)

Ok, sounds the same as the whipple...probably the exact same part to be honest.

Here is the little restrictor thing,

Gadgetized

iTrader: (9)

I was having problem with my boost activated cutout. It was wearing the hole out where the shaft rides. The blade was opening up very fast and they do not use a restrictor. I actually made my own to slow it down. I will say it doesn't take much of a hole to make it open faster. I would be concerned if it starts slamming opened or closed that it doesn't cause damage to its self. If it isn't slamming, you will more than likely be happy with the results. My cutout is working great now.

Atomic

iTrader: (42)

Yea I didnt plan to take it all the way out, just make it marginally bigger to try and see some responsivness improvement.

BigKID

iTrader: (5)

I dont know if KB and Whipple use the same bypass valve actuator but mine is referenced from the lower manifold and does not have a restrictor in the inlet (full bore on hose barb).

Atomic

iTrader: (42)

So I drilled it out to 1/16" and reinstalled it and everything is great, I got my 7.5 pounds haha! Not sure if it wasnt installed correctly the first time or if drilling it out slightly helped that much but all is good. Next move is finish putting on the 8rib pullies and the 3" blower pulley for maybe 10psi or so.

BlackGMC

iTrader: (31)

How small of a pulley can you get for it?

Atomic

iTrader: (42)

I think they make a 2.75" but I picked the 3" because it will be at max blower speed at where I plan to shift.