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let me say this first, i have never had as much success with a 2bbl as with the MC 2150. for the street and mild offroad, it is sooo smooth, but when i had it up at some 60* angles or better it wood lean out on me. found the power valve at the bottom of the bowl became uncovered when at extreme angles of asscent.
so i swtiched over to holley 2bbls. same bolt pattern as the MC. the larger holley 4412 list # ran smooth, but mileage sucks, i nu that goin in, and the carb dint have all the vac fittings i wanted, what to do.
i was looking on the holley web site at the specs of my 2bbl when i noticed that the dimensions of my 2bbl are the same as the dimension as the front half of a holly 750 double pumper, hmmm. looked at the pics of a 750DP and it has all the proper vac fittings i need, but what to do with the second 2 bbls, i dont use em on the trail.
i saw the second bbls are actuated by a link connected to the throttle lever. what wood be the case if i removed that link? since i got a nice 4bbl manifold ready to install, thot i give it a try. first i have to get a 750DP.
looked on ebay and the ones that looked to have life still in em were too $$$, till i found one being sold cheap by a carb place from the E coast. they told me that a custom engine shop had ordered it for a customer and had the carb shop engrave the customers name on the carbs bowl, airhorn, metering blocks, everywhere, but then the engine shop canceled the order, saying they needed a bigger carb. the carb in question was a holley 650DP not a 750DP, the price for this nu, never used 650...180$
hmmm, 650 seems a tad small, but the price is great. so i bought it. got it today and removed that link i mentioned earlier, hooked up only one fuel bowl, connected all the vac fittings and it runs great, albeit not tested on the road yet, just in the back yard, i still have to install the tranny and QT, but thats a different post.
at idle the vac was lower than with the 2bbl, 22" 2bbl compared to 20" 4bbl. the 4bbl venturies being 1/8" smaller that the 2bbl, but throttle response is GREAT. smaller venturies give better mixture i suppose.
so i swtiched over to holley 2bbls. same bolt pattern as the MC. the larger holley 4412 list # ran smooth, but mileage sucks, i nu that goin in, and the carb dint have all the vac fittings i wanted, what to do.
i was looking on the holley web site at the specs of my 2bbl when i noticed that the dimensions of my 2bbl are the same as the dimension as the front half of a holly 750 double pumper, hmmm. looked at the pics of a 750DP and it has all the proper vac fittings i need, but what to do with the second 2 bbls, i dont use em on the trail.
i saw the second bbls are actuated by a link connected to the throttle lever. what wood be the case if i removed that link? since i got a nice 4bbl manifold ready to install, thot i give it a try. first i have to get a 750DP.
looked on ebay and the ones that looked to have life still in em were too $$$, till i found one being sold cheap by a carb place from the E coast. they told me that a custom engine shop had ordered it for a customer and had the carb shop engrave the customers name on the carbs bowl, airhorn, metering blocks, everywhere, but then the engine shop canceled the order, saying they needed a bigger carb. the carb in question was a holley 650DP not a 750DP, the price for this nu, never used 650...180$
hmmm, 650 seems a tad small, but the price is great. so i bought it. got it today and removed that link i mentioned earlier, hooked up only one fuel bowl, connected all the vac fittings and it runs great, albeit not tested on the road yet, just in the back yard, i still have to install the tranny and QT, but thats a different post.
at idle the vac was lower than with the 2bbl, 22" 2bbl compared to 20" 4bbl. the 4bbl venturies being 1/8" smaller that the 2bbl, but throttle response is GREAT. smaller venturies give better mixture i suppose.
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