footbrake or 2 step w/holley vac secondary ?

GallopinGhost · 04-06-2019, 11:18 AM

Looking for some advice. I have a new car, e-body, with a big block and am wondering which is the best method to launch. For consistencies sake I would like to use the 2 step, but I think with the throttle floored I"m missing out on the primary pump shot on launch, and also not sure what the secondary would be doing. The carb is the R4688. I think if flows 725cfm, but I can't find much of any info online. thanks

04-06-2019, 11:18 AM	#1
GallopinGhost Member Join Date: Jun 2010 Location: VA Posts: 230 Likes: 23 Liked 21 Times in 13 Posts	footbrake or 2 step w/holley vac secondary ? Looking for some advice. I have a new car, e-body, with a big block and am wondering which is the best method to launch. For consistencies sake I would like to use the 2 step, but I think with the throttle floored I"m missing out on the primary pump shot on launch, and also not sure what the secondary would be doing. The carb is the R4688. I think if flows 725cfm, but I can't find much of any info online. thanks __________________ Brian Carpenter Stock 1358

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