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Upgrading Carbs for GT5

G Guest
Hi, Jack. With regards to your reply to A.Brown question,I have just purschase the Holley double pumper 750cfm to upgrading my present 600Holley v/cum type which about to install soon. Also together with the Electronic Zenith single point Distributor setup. What will be my problem with this convertion? I have a plan to improve the H/P in the near future. Your recommentation is much appreciated. Thanks.
Original Post
bosswrenchbosswrenchMember
Sticking a 750 double-pumper on your motor will instantly give you about 30 more horsies to play with, and drop your gas mileage to maybe 12 or 14 mpg, unless you re-jet it on a dyno that loads the engine. Throttle response will be slower than you got with the 600. Double-pumpers are considered racing carbs & Holleys are always jetted rich as received anyway- they have no way of knowing what your intentions are. Finally, a 750 is a big carb for a 351C unless its been heavily modified.
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