We're chasing a hesitation at throttle tip-in, both from a dead stop and at gear changes, when the car is dead cold. Going half throttle from a dead stop when it's cold will even make it nose over and then recover. There doesn't appear to be any issue once the car is warmed up. I've noticed that it requires only the slightest amount of throttle before boost starts registering on the stock gauge - maybe as little as 1/8 or 1/4 throttle and it'll show a few pounds to 5 pounds of boost. Let's leave MAF transfer tune issues off the table, because the tuner is a credible and experienced guy, and we've discussed this and ruled it out.
Three questions then -
1) Is it normal to show an onset of boost at such slight throttle input? I remember it took about 1/2 throttle or more to see anything with my Lightning. I'm running a TVS with 2.4" pulley, if that matters.
2) Can this issue be caused by a misadjusted bypass valve? To be honest, when the TVS arrived I threw it on the car without bothering to check the adjustment.
3) If it is the bypass valve, what is the correct adjustment procedure?
Any thoughts are much appreciated.
Three questions then -
1) Is it normal to show an onset of boost at such slight throttle input? I remember it took about 1/2 throttle or more to see anything with my Lightning. I'm running a TVS with 2.4" pulley, if that matters.
2) Can this issue be caused by a misadjusted bypass valve? To be honest, when the TVS arrived I threw it on the car without bothering to check the adjustment.
3) If it is the bypass valve, what is the correct adjustment procedure?
Any thoughts are much appreciated.
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