Duane, the tripower was pretty successful on the Pontiacs and the Oldsmobiles since both of those engines had enough cubic inches to make use of the extra CFM. In 1957 Pontiac called the setup "Tri-Power" and Olds called it the "J-2" option. Both factory setups used a very unpredictable vaccum-triggered system to slam the outer carbs wide open when the driver went to full throttle. Most of the serious drag racers canned the vacuum system and went to ball-bearing heim-jointed mechanical linkage and BIG return springs. Nothing like backing out of the gas at the end of a run and finding out the vacuum system doesn't want to cooperate! The Corvair Spyder used a 4-carb setup with a vacuum-dump no idle auxiliary carb on each side of the flat 6 cylinder air cooled engine. That system was a pain in the butt also.

The rate of opening of the outer carbs on a 283 would need to be somewhat gradual to avoid a bad lean spot due to the limited volume available to make the carbs work going to full throttle. That can be mitigated somewhat by making sure the accelerator pumps on the outboard carbs have plenty of stroke and the jets are a bit on the rich side.

All things considered, the QuadraJet looks better than all the other options combined.
Jerry

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