Winter project trying to get finished buliding 454 stroke to 496 run 8.7:1 comp, Bob Madara cam, 781 heads with work, inconel valves port polish, Question is what size carb. I have been told to go smaller blow thru like 450 cfm I currnetly have 850 but told to much carb and would not work.(Run Lean) My thinking is i need more since pushing air 3.5 boost. M3sc procharger

Any thoughts, sorry if I left any info out,

im thinking around 750 cfm,call quickfuel carbs,they make a great carb and have experiance with blow threw setups.

+1, 750 cfm should be perfect,,if you want a B i t c h i n carberator for your set up and not have to worrie about the temp changes go with a c&s specialties aerosol carberator...they are real responsive too!
http://www.candsspecialties.com/stor...lbillets2.html

Eric,

Did Vrbancic Bros. Racing (AKA The Carb Shop) provide you with that recommendation?

Regards,

Bob

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Also running big pc intercooler box 504 I believe

if you deside to go wit hsomeone elses recomendation at leaste have them put auunlar boosters in tghe carb..with the c&s carb theirs vary little restriction unlike a regular booster type carberator..

I'm running 509 w/MSC3 used a 950 from prosystems, was spot on out of the box...patrick is who you need to talk to...Rob