The advertized HP gain is rather small for this $600 device. I see it on Whipples. Is it better for a pullied engine? Does anyone have any performance data from dyno runs with and without?
I have pulley, tune, exhaust. Notice a drop in boost over 5000 RPM as HP starts to peak toward 6500 RPM. I figure I'm sucking a vacuum on the air cleaner and you can't compress a vacuum. I just would like some scientifc data that says the Accufab will help restore some of the boost or not. I don't care about bling.
I put the stiffener in the coupler and I'm a little concerned that it reduces the cross section a little too.
.I just would like some scientifc data that says the Accufab will help restore some of the boost or not. I don't care about bling. Spot on!
I put the stiffener in the coupler and I'm a little concerned that it reduces the cross section a little too. I went with the power rings for that very reason.
Gentlemen,
The benefit of this piece is marginal with a stock engine. Utilizing a smaller pulley with higher boost levels or with a Whipple supercharger, it becomes more beneficial as a decrease in inlet restriction becomes more important. Unlike the huge monoblade throttle bodies that turn your gas pedal into an on/off switch, the Accufab throttle body offers less intake restriction with smooth and linear throttle response. I would only spend the money to purchase one if I was using it in combination with several other performance enhancements.
Chip
Heffner warned me when I did my Whipple that the Accufab throttle body would only add a couple of horses and was mainly for looks. I still bought it since the stock one looked like crap with the polished Whipple. No regrets.
The system will never approach laminar flow - it is in turbulant flow throughout.