Accufab introduces the 8500 Series Throttle Body.
It’s Accufab’s contention that in race applications, the available intake air on naturally aspirated or nitrous equipped engines is too restricted. It takes about twelve times as much air as it does gasoline to create fuel. Recent tests have shown significant horsepower gains with larger inlet air supply.
In many race classes, racers are limited to a single 4-Barrel carburetor or a single Throttle Body. Accufab used a clean sheet of paper for this one and came to the conclusion that the standard intake manifold opening for the largest carbs available (the 4500 series) was just not adequate. Accufab’s goal was to design a better 4-Barrel Throttle Body, not to try and fit it onto the existing 4500 series intake manifold inlet opening, an inlet opening that was originally developed in 1969. Accufab’s concept was to develop a new 4-Barrel Throttle Body, with a 50% larger inlet area, and let the racers (or the intake manifold manufacturers) come up with better intakes to match the increase in air flow. Racers are creative, they will figure out how to modify their existing 4500 series intakes to accept the 8500 Throttle Body (the bolt pattern is slightly larger) or better yet, use a sheet metal plenum style intake manifold.
The Accufab 8500 Series 4-Barrel Throttle Body is machined from billet aluminum and has 2.75-inch throttle bores and flows 3,600+ CFM at 28-inches. There are no 4-barrel carburetors that can come close to matching that air flow rating. And if that’s not enough, racers can mount two of them together for double the volume.
Each throttle body weighs 3.5-pounds, compared to up to 13-pounds for a big 4500 series carburetor.
More air flow, more horsepower, less cost, less weight, what’s not to like?
Accufab introduces the 8500 Series Throttle Body.
It’s Accufab’s contention that in race applications, the available intake air on naturally aspirated or nitrous equipped engines is too restricted. It takes about twelve times as much air as it does gasoline to create fuel. Recent tests have shown significant horsepower gains with larger inlet air supply.
In many race classes, racers are limited to a single 4-Barrel carburetor or a single Throttle Body. Accufab used a clean sheet of paper for this one and came to the conclusion that the standard intake manifold opening for the largest carbs available (the 4500 series) was just not adequate. Accufab’s goal was to design a better 4-Barrel Throttle Body, not to try and fit it onto the existing 4500 series intake manifold inlet opening, an inlet opening that was originally developed in 1969. Accufab’s concept was to develop a new 4-Barrel Throttle Body, with a 50% larger inlet area, and let the racers (or the intake manifold manufacturers) come up with better intakes to match the increase in air flow. Racers are creative, they will figure out how to modify their existing 4500 series intakes to accept the 8500 Throttle Body (the bolt pattern is slightly larger) or better yet, use a sheet metal plenum style intake manifold.
The Accufab 8500 Series 4-Barrel Throttle Body is machined from billet aluminum and has 2.75-inch throttle bores and flows 3,600+ CFM at 28-inches. There are no 4-barrel carburetors that can come close to matching that air flow rating. And if that’s not enough, racers can mount two of them together for double the volume.
Each throttle body weighs 3.5-pounds, compared to up to 13-pounds for a big 4500 series carburetor.
More air flow, more horsepower, less cost, less weight, what’s not to like?
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