sandboxer":2c48c2u0 said:Thanks. I’m reading mixed messages throughout this thread, as everyone has a different setup, but I’m definitely worried about carb overkill.pmuller9":2c48c2u0 said:My last build had a 232/232 .050" duration .534" lift cam with a big valve ported head.sandboxer":2c48c2u0 said:Anyone have experience with a 450 double pumper? I need to decide on my induction soon, so this thread is of the highest importance at this point for me.
I have two Carter BBD (285 cfm) carbs that are an option to a 4 barrel mechanical.
The 450 double pumper is a distinct option though.
I had very good results with a Quick Fuel HR 650 cfm carb, mechanical secondary.
I would recommend a 650 cfm carb for your engine also.
I spoke with Tom at Stovebolt and he was adamant about using the Holley/Weber progressives (3 of them) for drivability. I hear all the other voices of experience as well, so it’s a lot to digest.
I tend to agree with the notion that 80% VE for the 300 is probably near the top end of things, so I was planning on staying in the 400 cfm range.
I’ll pick up a 650 though and try it. I’m worried about used ones that have been “tuned”....
I would recommend a 500 cfm Edelbrock for bolt on performance and reasonable economy. Get the tuning kit with it with a selection of metering rods and jets. The book is easy to understand, and the jets/rods/springs are easy to change. It is a great little carb.