Quote:
Originally Posted by 70rs
A double pumper carb is fine if it is sized right. The vac secondary carbs only work right if you have enough vac to operate them and have the engine tuned really well. I guess what I am saying is the double pumpers are a little more forgiving with regard to engine tune.
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If anything, a vac secondary carb is going to be more forgiving and easily adjusted. Adjust the air door or change the vac secondary spring to tune the opening rate. Most OOTB carbs are going to "work" ok, but to get them dialed in will take some effort which could include a wideband 02 sensor and/or dyno time.
Properly tuned, the 800 should work just fine but you may find you get better throttle response with a smaller carb.