In specific, for myself and for a friend. 4500 1050ish size. gas and alcohol. We both have BBC 3000# bracket door race cars. 482" for alcohol and 496" for gas. Looking for improvements in consistency, throttle response and shift recovery. Better ET and MPH would be nice, but really looking to have a better package of reaction times and ET consistency.
Is there any proof this would be possible with 2 blade versus 4 blade? Already tried single blade and nothing there and slower on alcohol versus gas on 2 carbs built by same company.
We looked at the 2 blade style at PRI recently. They are beautifully built. The sales people touted better response and repeatability along with increase in horsepower. Also told us 2 blade design eliminates turbulence in the 4 blade 4500 design where the hole is between the blades on the underside. Up where the internal secondary linkage is. Seems like any 4 hole spacer or plate would eliminate that?
Would skirted annular discharge boosters work well with twin blades? Are twin blade 4500s too large in CFM for 482"-496"size bracket engines operating at less than 7500 RPM in 1/8 mile drag racing?
i believe Mark W. has experience with these 2 blade style. I am aware of issues over rights to build these 2 blade carbs.Statistics: Posted by bigblockmark — Fri Dec 17, 2021 3:36 pm
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