Question on Brake Booster and Throttle Response

[colnago]

I am finishing up the conversion from front drums to discs. Part of this conversion was replacing the brake booster, because I wasn't 100% confident my old booster was still working properly. So, I finished putting everything in, bled the system, and went for a test drive. I must have done something right, because it stops pretty well now. But here's the question.

If I stomp on the brakes, then let up and give it some gas, there's a hesitation before the engine revs up again. If I slowly apply the brakes, like I'm coming to a traffic light, everything is fine, but when I stomp hard, I get maybe a 1/2-second pause when I let up. Anyone know what would cause this? Since the booster is vacuum-assisted, I expect stomping and letting off is impacting the air flow, and making for a temporary lean/rich mixture, but I wouldn't think it would be enough to impact engine performance.



Joseph

[cep62]

If you have a Holley , maybe it's sloshing some fuel and running a little rich. ??

[colnago]

Well, I have an Edelbrock, but the booster goes into the port at the back of the carb, so maybe you're onto something there. I can try moving some of my vacuum lines around, and see if that changes anything.

Joseph