See your off line.The King Demon's going to be the hardest to tune for you, Have done plenty of them on the dyno, they are lean out of the box. I have had to start with a smaller main air bleed to pull more fuel in that circuit, go to a smaller int. air bleed drill out the transfer jets that are on the metering block. This is very hard to explain, depending on the flow # on the heads and your cam specs, very hard. It takes drill bits in the
.o18" and Numbered drill index. Are the carbs boost ref. If not that PV is no good to you. If you haven't used these yet I would send them back and get the 4150 style 1025rs that carb if using two per engine will work great. It will support 1200 hp and 10 psi boost. You will be able to set that one up easier with only jet changes, they would be my first choice for your application.

Sent you a PM try to walk you through it.

MER,
I read this post as these were blower motors, but are now NA.
Ben

I only saw, blower motors. Just went back and re read it. Guess my eyes are tired, He is still going to have a time doing this. I 'am switching from BG to Pro Systems, Patrick, did some for me and they were perfect! They were custom built to the spec on the cam, head flow #s, CID, and RPMS, I have wasted alot of time on the dyno setting these up, those BGs are not built the way they were in the beginning, when using a Holley platform, I have had problems with them just getting them together right! I guess it a matter of the PROFIT, bottom line numbers, with carbs going down an assembly line.
Mark

We are running 3.5 PV but you will be best served by determining what is best for your combination. Using a vacuum gauge or an AFR gauge and to confirm when your power valves open is much better than benchmarking off our engines. Our PV's open at about 80% of the WOT RPM and do not open at idle in gear.

Simple but interesting piece on power valve tuning:

http://www.youtube.com/watch?v=6vKlAnKdcB4