Posted By: Kudakidd
Holley Carb Question - 06/27/08 01:00 AM
Are power valves used on the secondary side of Holleys? A friend has a 750 vacuum secondary with a metering block. Although there was one in it, I can't find any tech info which lists PV's in the secondary side. What's the story?
Posted By: Pacnorthcuda
Re: Holley Carb Question - 06/27/08 01:05 AM
sounds like someone replaced the metering PLATE with the block (its often done)and installed the PV.
Posted By: Leigh
Re: Holley Carb Question - 06/27/08 01:45 AM
The original 3310 ( -1 suffix, I think, 780 cfm) came with primary and secondary metering blocks, with 8.5 and 10.5 valves respectively. This was also the BB Chevy configuration.
Posted By: Andrewh
Re: Holley Carb Question - 06/27/08 01:54 AM
the vacuum secondary ones, old style anyway did not have pv in the secondary side.
you usually find a plate there with a recess that isn't cut all the way through that looks like a pv could go there, but there was not.
Posted By: Anonymous
Re: Holley Carb Question - 06/27/08 02:09 AM
Quote:
sounds like someone replaced the metering PLATE with the block (its often done)and installed the PV.
i gotta mark this day down in the calender, becouse 
Posted By: YO7_A66
Re: Holley Carb Question - 06/27/08 10:32 AM
Leigh is correct. I just checked the list and it did note that the 3310-1 is a 780cfm unit with 72/76 jets and a 025 nozzle. It showed under "PV" to see notes #12 & 13. #12 shows a 8.5 secondary pv and #13 note shows a 10.5 primary pv. I found this info on page #1 of the Holley part number listings (which I can't get attached to this response).
Edit:
I made a two page PDF that shows the info including notes #12 & #13.
