GT350 whipple problems

JCSIX13

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Yes at the beguining of my isues when car arrived to Barcelona I contact to Jeff (whipple) but couldn't solve my problem so I contact Jon Lund and he did a great job.
Your car is a GT350 ?
If yes, do you have the assamble instructions of the whipple kit and could find if there is any information about the vacuum actuator ?
Thanks


Yes my car is a GT350

Here is the latest install instructions from whipple. file:///C:/Users/CMC-%20PC/Desktop/MY16%20Ford%20GT350_RevA1R6_Low%20=18.pdf

From page 61.
Verify the bypass actuator is working properly. To monitor, look at the bypass arm when the motor is not running. Start engine and verify that the actuator arm has opened. This arm will be extended when the engine is above 1” of vacuum (boost) and will be open when there is more than 1” of engine vacuum. There is a great deal of misinformation about the function of supercharger bypass systems. The supercharger is a positive-displacement pump; that is, so long as it is rotating, it is always pumping air. During low demand or high vacuum operation (i.e. idle, deceleration, and light throttle cruise), the pumping action is undesirable as it creates unwanted heat and noise. The bypass circuit, when open, prevents any pressure buildup across the supercharger and allows air to circulate through the rotors, allowing the supercharger to “idle” freely during these conditions. This results in reduced noise, and by reducing heat buildup in the intake, significantly improves street and strip performance. As throttle demand increases, the bypass circuit is closed, resulting in full performance and strip performance. As throttle demand increases, the bypass circuit is closed, resulting in full performance from the supercharger. The bypass circuit is never used to limit or control boost during full-throttle operation and defeating or altering the bypass function will not result in improved performance in any condition, and will result in poor drivability and possible supercharger damage.

Jack
 

JAJ

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...There is a great deal of misinformation about the function of supercharger bypass systems....
I couldn't agree more!!!

...This arm will be extended when the engine is above 1” of vacuum (boost) and will be open when there is more than 1” of engine vacuum...
And there you have it - the Whipple bypass is set to operate at zero manifold pressure (behind the throttle plate), which is the point where you're starting to make boost. I wondered if there was a difference between Whipple and TVS because the TVS is a positive displacement pump (it pumps a fixed volume of air every revolution, but it doesn't actually compress it on the way through the pump) and the Whipple is a twin-screw, and I believe that a twin-screw actually compresses the air as it moves it. Trying to make a twin-screw take air at the inlet, compress it and then release it into a vacuum is wasteful and potentially hard to make work properly. Not having the bypass close until you actually need compression makes sense.

Good luck!
 

JCSIX13

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My Car is hard to start in comparison to when it was stock with a tune. I am getting codes when it first starts. not sure what is going on.
 

JAJ

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My Car is hard to start in comparison to when it was stock with a tune. I am getting codes when it first starts. not sure what is going on.
There's a lot more to a successful blower tune than getting the AFR and spark right at full throttle. You've got a tune problem in the "starting" section and you'll need to log it and get an experienced tuner to figure it out.
 

Toni

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Yes my car is a GT350

Here is the latest install instructions from whipple. file:///C:/Users/CMC-%20PC/Desktop/MY16%20Ford%20GT350_RevA1R6_Low%20=18.pdf

From page 61.
Verify the bypass actuator is working properly. To monitor, look at the bypass arm when the motor is not running. Start engine and verify that the actuator arm has opened. This arm will be extended when the engine is above 1” of vacuum (boost) and will be open when there is more than 1” of engine vacuum. There is a great deal of misinformation about the function of supercharger bypass systems. The supercharger is a positive-displacement pump; that is, so long as it is rotating, it is always pumping air. During low demand or high vacuum operation (i.e. idle, deceleration, and light throttle cruise), the pumping action is undesirable as it creates unwanted heat and noise. The bypass circuit, when open, prevents any pressure buildup across the supercharger and allows air to circulate through the rotors, allowing the supercharger to “idle” freely during these conditions. This results in reduced noise, and by reducing heat buildup in the intake, significantly improves street and strip performance. As throttle demand increases, the bypass circuit is closed, resulting in full performance and strip performance. As throttle demand increases, the bypass circuit is closed, resulting in full performance from the supercharger. The bypass circuit is never used to limit or control boost during full-throttle operation and defeating or altering the bypass function will not result in improved performance in any condition, and will result in poor drivability and possible supercharger damage.

Jack
Thanks Jack, this is the conclusión I arrived when I did an in deep análisis of my hesitation issues after talking to Jon Lund and knowing it's not a tune issue, it's a bypass issue.
Your information is what I need to know I'm in the correct way to solve this problem, the bypass actuator was in my Whipple supercharged kit was not the correct one so now when arrives the new one (1"hg vacuum closed to 5"Hg vacuum open) I already bought will see if this hesitation desapear.
Thanks Jack
 

JCSIX13

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Thanks Jack, this is the conclusión I arrived when I did an in deep análisis of my hesitation issues after talking to Jon Lund and knowing it's not a tune issue, it's a bypass issue.
Your information is what I need to know I'm in the correct way to solve this problem, the bypass actuator was in my Whipple supercharged kit was not the correct one so now when arrives the new one (1"hg vacuum closed to 5"Hg vacuum open) I already bought will see if this hesitation desapear.
Thanks Jack

Please let me know how you make out with the new bypass actuator. Where did you get the new one from?

Thanks
Jack
 

JCSIX13

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There is a huge thread on another forum about part throttle hesitation, but it’s on the coyote...unsure if it could be the same issue. I’d definitely be contacting whipple again as they tout their customer service being so good


what forum are you talking about? can you send me a link?

Thanks
 

mtdubvee

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Did this issue with the bypass ever get resolved? My GT350 is doing the same thing..If I go WOT it acts fine, but if I ease into a pull, the car falls on its face for a second and then takes off. The hesitation is so bad that it kinda moves your body forward and then slams you back again. So im hoping to possibly install a new bypass actuator to fix it. Thanks and any help is appreciated.
 

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