On another note - what other mods do you have to your engine?...are you running headers or just a CAT-back??
Thansk again! You are our pioneer!
My exhaust system is basically the same system that Shadowman offers.
http://www.fordgtforum.com/forums/showthread.php?t=15463
Thanks for the kinds words with regard to being a pioneer but I think many here are on the job. Although it can be frustrating, I kind of like the challenge (as long as I win in the end).
Did the new valve ship to you with a actuator adjustment tool? Was it straightforward to properly adjust the actuator? Proper adjustment is essential.
I miss-spoke, I only ordered the bypass actuator/diaphragm. The valve seemed mechanically sound. It's movement was smooth and unabated.
Exactly. As the solenoid is controlled by the ECU (to afford the protection as Rich suggests), it also begs the question if, on a modified car, the ECU "sees" what it believes is an over-boost condition and tries to save itself. In short, maybe there's additional programming that can be done so the ECU isn't the culprit that is pro-actively taking boost away from you.
The ECU function had been removed and tested. I attached the top diaphragm hose directly to the supercharger boost gauge vacuum line. This should produce positive pressure, and thereby close the valve in boost conditions. However, I could reproduce the boost-loss problem with the ECU out of the equation.
I know you are just testing and eliminating variables, but long term I would not recommend elimination of the bypass valve as its primary function is to eliminate SC cavitation.
I do not want to do this either. However, I am a little unclear on what the bottom vacuum line does for the engine. Rich tried to explain to me that it opens the valve when condition make the motor pull too much vacuum thru the intake tube. Because this line attaches to the bottom of the diaphragm and therefor a true vacuum would "pull" it closed... I can not get my head around how this would work.
With Whipple selling this as a "Ford GT kit" - how much testing is/was actually done with the 4.0litre "in situ" on the car to ascertain what other modifications and additional components/items are needed to make the S/C work effectivley.
Surely it's counterproductive to simply knock out a "4.0litre kit" if it ends up being inferior to the 3.4Litre or develops a "bad rep" for the company?
I think they tested the 4.0 system on one car with a stock exhaust system. I suspect that every car it has been installed on sense has an aftermarket system. I wonder if the reduced restriction on the back-end has revealed new restrictions on the front end.
I don't recall reading of any installs that went as smoothly as the Gen I or IIs. It seems that all of the 4.0L installations have been more than a simply bolt on and re-flash. Maybe Dustin can give us some more insights as to what is necessary for a seamless integration.
Oh, I know, I know... time and money. Just kidding, we will have this problem solved and a solution for everyone in short order.
