Hood to carb clearance

[Hacksaw]

I'd try it like it is. 2" should be ok.

[Tom Goldman]

2" is not enough . .......first thing you will notice is fuel staining on the bottom of the scoop from reversion . ...4" is minimum , more is better to allow the air flow to straighten out and minimize turbulance.
I picked up nearly 2 mph going from 2" to 5 1/2"
Accompanning pics are from a customers car but I did the same thing to a similar scoop for my car .
no one really makes a scoop that is a reasonable length for a Sportsman style car so get out the saw and the resin . ....No big deal to do .

[Lenny5160]

Originally Posted by Hacksaw

I'd try it like it is. 2" should be ok.

x2. I’d try it.

Before I started throttle stop racing, I always ran the stock hood which didn’t have near 2” of clearance. I didn’t notice any difference in performance our consistency with the 4” cowl.

[Jim Caughlin]

In SS where stock hood is reqd, there was a test lowering a sheet of plywood over the carb, the height number where performance dropped off was 2" over the stock choke horn.

[gnicholson]

I've decided to glass an aero scoop into the hood. I would post a pic if I knew how to do it