[Dick Boneske]

Some of the posters above have not driven a STOCK Pontiac Tripower car with factory mechanical linkage. There is NO bog or hesitation when the end carbs open. The Ford linkage that opens the end carbs at different rates is totally unnecessary. Ditto for the idle circuit on the end carbs--idle with a stock Tripower is perfect with the center carb only--the engine does not know the end carbs are there at idle if the throttle plates are adjusted for a good seal. Pontiac sold many 455's with a single two barrel in the early '70's. There is also no reason for a power valve on the end carbs. The power valve in the center carb takes care of driveability at part throttle, which is what the power valve does in any engine. Four barrel carbs rely on the power valve in the primary barrels only.

The biggest advantage of Tripower over many four barrels is the shot of fuel from the two end carb accelerator pumps when they are opened.

Larger venturis in any or all of the carbs is a good idea, but the other mods mentioned will likely make the system less driveable and likely not quicker under any conditions.

As I stated above, apparently many of you have not driven a correctly set up stock Tripower with mechanical linkage.