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Original Message
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| RE: 390 Tripower cam? |
| By Travis Miller - 03/17/2001 8:18:14 PM; IP 152.163.204.194 |
While the tri-power set up is neat, it can have a problem when used with an automatic. It uses mechanical linkage. Even though it has accelerator pumps on all three carbs it can still have a bog when all three are opened from a dead stop. Couple this with too much duration on the cam and the engine will have no bottom end power. This is why Mopar and Chevy used vaccum operated end carbs on their tri-power set ups in the late 60's.
While visiting John Veermersch at his shop in Michigan back in the 80's, I got to see an old experimental tri-power set up that Ford tried in late 1960 for the FE. They tried to solve the bogging problem with vaccum chambers on the end carbs off of 4-bl Holleys. The chambers were too small and did not work consistently. This was several years before the large chambers were developed for the Mopar and Chevy set ups.
When talking with cam companys, be sure to tell them about the tri-power set up and the mechanical operated end carbs. They will be familiar with the Mopar and Chevy set ups but not the Ford. One guy said that it should act like a double pumper carb, but there is too much CFM when all carbs are suddenly opened off idle.
The main thing I liked about them was the visual effect. They are one the sharpest looking induction set ups ever built. |
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