How do you "Boost Reference" a Holley Carb???

[Loose Goose-Terry#1]

  Gee, I wish someone could explain to me how in the world to boost reference a Holley carb. I am only going to run about 12 to 15 psi of boost using a GMC Blower with a little 450 cfm Holley carb. How oh How do I get myself in to these sort of fixes???

Thanks for the help the LSR community is famous for.

Terry

[fwillyj]

-here's a link to an article that Duane Carr did a while back for MSV

http://www.motorsportsvillage.com/modifycarb.html

[racin jason]

what is the advantage to doing this?
i have a 14/71 on a 496bbc that runs regular 4150 carbs.

[Dynoroom]

Terry, It's not hard to do but is important to do with smaller carbs as you can indeed pull a vacuum under them at WOT and full boost. Give me a call and I'll walk you through it. 714-572-3672

[Loose Goose-Terry#1]

  Thanks Mike. I'm sure that I'll find the information VERY helpfull.

  Now another question: On a supercharged 1500cc engine   what carb should I go with?
A 390cfm Holley with vacuum secondaries OR
A 450cfm Holley with vacuum secondaries OR
A 450cfm Holley with manual secondries.

Will vacuum operated secondaries even work with a supercharger?

Terry

[Stainless1]

what is the advantage to doing this?
i have a 14/71 on a 496bbc that runs regular 4150 carbs.

Jason, you need to read the moto roadster thead....  no car motors on Busas.... 

[racin jason]

Come on Stainless i'm not into cross pollination!
The blown motor is in my boat. 

[Stainless1]

Oh  well that explains the hatch cover thing....    and here I was thinking you were building something crazy....er than a 250+ MPH motorcycle. 
Have fun, I am....   

[Blue]

"Boost referencing" any carb is simple:

1. Plumb each vacuum reference to the inlet.
 
-or-

2. Build a box around the carb and pressurize the whole thing.