footbrake or 2 step w/holley vac secondary ?

Dan Lattimore · 04-08-2019, 11:18 PM

Brian----This was done on cars that had the best of everything as far drive train ,chassis and suspension. Just get the spring assortment kit and start with something in the middle. Change springs up or down depending on tire spin and how the car feels and reacts. ---- Another tuning tool to get the car down the track.

GallopinGhost · 04-09-2019, 10:14 AM

Dan, Just trying to find a good ballpark. I will try to get it halfway opened. I should be able to do that in the driveway with a paperclip on the linkage. Testing is great, but getting quality testing done is, as you know, takes alot of time. Thanks

Quote:

Originally Posted by Dan Lattimore

Brian----This was done on cars that had the best of everything as far drive train ,chassis and suspension. Just get the spring assortment kit and start with something in the middle. Change springs up or down depending on tire spin and how the car feels and reacts. ---- Another tuning tool to get the car down the track.

Coleydog · 04-09-2019, 02:32 PM

Brian, glad you out racing finally, hoping for the best. On the carb, remember the secondary's work on velocity of air thru the primary's, so if two stepping at around 3000-4000 there might not be enough air flow to pull the secondary's open. Don't forget to restrict the channel branching into the secondary's (better signal). More to come, we'll talk pm

Dan Lattimore · 04-09-2019, 11:40 PM

Quote:

Originally Posted by GallopinGhost

Dan, Just trying to find a good ballpark. I will try to get it halfway opened. I should be able to do that in the driveway with a paperclip on the linkage. Testing is great, but getting quality testing done is, as you know, takes alot of time. Thanks

Brian -- PM

GallopinGhost · 04-10-2019, 06:51 AM

PM sent

GallopinGhost · 04-24-2019, 08:11 AM

Made some progress. I've got the secondary actually opening somewhere on the run and have discovered that the secondary is worth at least .80 over just the primaries.

and thanks Danny for the advice and for the tow back to the pits from the top end(blown fuse)

got alot of work to do

04-08-2019, 11:18 PM	#1
Dan Lattimore Member Join Date: Jan 2003 Location: Beaverdam, Va./ Port St. Lucie,Fla. Posts: 362 Likes: 177 Liked 154 Times in 37 Posts	Re: footbrake or 2 step w/holley vac secondary ? Brian----This was done on cars that had the best of everything as far drive train ,chassis and suspension. Just get the spring assortment kit and start with something in the middle. Change springs up or down depending on tire spin and how the car feels and reacts. ---- Another tuning tool to get the car down the track. __________________ 66W30POST

04-09-2019, 02:32 PM	#3
Coleydog Senior Member Join Date: Jul 2014 Posts: 569 Likes: 36 Liked 53 Times in 38 Posts	Re: footbrake or 2 step w/holley vac secondary ? Brian, glad you out racing finally, hoping for the best. On the carb, remember the secondary's work on velocity of air thru the primary's, so if two stepping at around 3000-4000 there might not be enough air flow to pull the secondary's open. Don't forget to restrict the channel branching into the secondary's (better signal). More to come, we'll talk pm

04-10-2019, 06:51 AM	#5
GallopinGhost Member Join Date: Jun 2010 Location: VA Posts: 230 Likes: 23 Liked 21 Times in 13 Posts	Re: footbrake or 2 step w/holley vac secondary ? PM sent __________________ Brian Carpenter Stock 1358 Last edited by GallopinGhost; 04-10-2019 at 05:57 PM.

04-24-2019, 08:11 AM	#6
GallopinGhost Member Join Date: Jun 2010 Location: VA Posts: 230 Likes: 23 Liked 21 Times in 13 Posts	Re: footbrake or 2 step w/holley vac secondary ? Made some progress. I've got the secondary actually opening somewhere on the run and have discovered that the secondary is worth at least .80 over just the primaries. and thanks Danny for the advice and for the tow back to the pits from the top end(blown fuse) got alot of work to do __________________ Brian Carpenter Stock 1358