Carb Size

kountzecobra · #1 (**permalink**) 07-09-2002, 06:13 PM

I am building a dual-quad intake manifold for the 351 Cleveland in my Replica. I am trying to decide on which Holley carbs to use: (2) Holley 450 cfm mech. sec. or (2) Holley 390 cfm vac. sec. Any suggestions from you dual-quad gurus would be appreciated. Engine: 11 to 1 comp. 4V heads. Comp 280 cam. 2" headers. 3.50 rear. C6 auto trans. Thanks, David Shelton.

Mr.Fixit · #2 (**permalink**) 07-10-2002, 10:55 AM

definately use vac secondaries. Link the vacuum pots together with a 1/8" tube. Put a tiny bit of progressive into the linkage so one carb comes on a wee bit sooner than the other.