Re: Cowl induction benefits
fishhead Any of those systems Ram air Cowl Induction Plymouth had a Air Grabber. All are ways of venting out side temp air to the the engine.Not so much the ramming effect is doing anything really.But if the engine can breath cooler air.Which all the fresh air systems accomplish.I would guess 5 to 10 Hp increase depending on how hot the under hood temps are running on a given day.I know Plymouth did rerate the 383 Magnum from 330HP to 335HP with the Air grabber option.5HP is not a big increase.But in very hot weather with high under hood temps the increase would be more on those days.
My open air cleaner is sealed to my Stock Chevelle Cowl induction hood. I did an unscientific test yesterday. It was 90 deg. outside and we drove the Chevelle to the lake. When we got there, I popped my hood and touched my valve covers and intake manifold. They were hot. I then, took off my air cleaner and touched the inside of my carb. - where the air travels. It was cool to the touch, surprisingly cool. Not very scientific, but, really kind of amazing. Note: if have my internal cowl gate open all the time , so, the cooler air from the cowl is constantly hitting my carb. from the rear of the hood -- even at low speed when the flapper is not open. I think there is a lot of benefit in the summer time keeping the internal cowl gate open (the one with the electrical connection to the gas pedal), it really keeps the carb. cool. It is easy to do, just loosen the clamp on the solenoid, bend the connection tab 90 degrees, then push the solenoid forward to open up the inner gate, then tighten the clamp. Disconnect the electrical at the gas pedal to save wear and tear on your solenoid.
1970 Chevelle SS396 (408), Fathom Blue,
Original Block & Forged Crank, KB Pistons, Edelbrock 6045 Heads,Comp Cam 292H, March Serpentine, RPM AirGap,750HP,100hp Nitrous
A/F Wideband,Tremec TKO 600, 12 bolt,
30 spline Moser Axles, Richmond 3:73's, Hotchkis control arms, swaybars, springs, Wilwood 12" rotors D/S, 4 piston calipers