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I really like the fact that your doing it yourself, from scratch. Going out of the box is what I’m trying to achieve. Build something that not only works, but no one else has. Please show pics when done. I built my whole system for 125.00 new and used parts.
I’m usually only in the car when it’s running, which means it’s pulling fresh air into the cowl vents. I’ve not had the engine back fire once, since it was dialed in. And I’ll only open the fresh air vent in the car if the ex wife wants to go for a ride. Just kidding!
I like this for the innovative thinking....and trying to be different. As mentioned above, it has been done in NASCAR....but those guys don't have the windows closed, so they have plenty of ventilation. My biggest concern is that if you have fuel boiling or evaporation problem in your carburetor....those fumes are headed straight to your heater box....which goes directly inside the car.
That’s why i installed one way spring loaded vent gates in the 4” inlets, when the engine is off it shuts off the tubes to the firewall. And I made the tubes inside the firewall turn so that they are right under the grill plates to the outside air.
The Ford Lightning used the ac to cool the air intake charge, but it was only good for about 10 seconds if I remember correctly.
My cowl venting to the passenger compartment will be closed off as the new a/c systems require it. They run on permanent recirculation or whats known as max a/c on the settings of newer vehicles. For me it was do this or put a hole in my hood for the air cleaner unit. I like using the cooler outside air.
I wonder if my new vintage air system has cabin recirculation, and not draw air from the upper cowl area. Anyone know this ! If that’s the case, all venting would come from the outside. And eliminate vapors from entering the car. Learning something new all the time?
With VA, all the fresh air intakes need to be blocked off.
Thanks for the info, I appreciate all the things I learn at FBBO.