I am going to install a new cowl scoop on a hood and want to have the least amount of scoop height as possible. what would be the least amount of clearance from the scoop to carb and is the measurement to the top of the vent tube or main body of carb,thanks Mike

I ran dual toilets inside a hood scoop. Had roughly 1-1/2 inches between the top of the toilets and the scoop. Not enough room for an air cleaner.

With a carb, I'm not sure but I would say to have at least an inch above the vent tube.

From a performance standpoint we use 4" from top of carb to roof of scoop.



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I've never run a hood scoop or a cowl hood on my door cars. I run the stock flat hoods and chose my intake manifold based on it, selecting one with the least amount of height and then I still cut down the carb pad. My vent tubes are right under my hood.

I've ran as little as 1/4" from the top of a slanted vent tube, seemed to run fine going 10.50's at the time.

HS professor...knows

I'm in the same boat. I have to run a scoop for engine packaging. I made a couple passes without a scoop and picked up .03. Now I'm going to cut down a new scoop and get it as narrow and short as I can.

When I was using a hood mounted scoop, the in car camera showed the back of the hood lifting as I was crossing the finish line.

Nothing special. Just a low aero scoop mounted to a low cowl. Just enough to cover the toilets on a tunnel ram.



Took off the aeroscoop and mounted a Hilborn type scoop directly onto the engine. Hood doesn't lift now and it's much easier to look over. Still grabs more than enough air for the engine.

https://youtu.be/EkpsydS8JXI

I've already ordered the salad bowl for 2018, lol.

I would try to keep an inch. And drill holes in the vent tubes from the sides, it will minimize any impact pressure causing bowl pressure to drop going down track. It does happen, and will cause the AF ratio to go lean down track.

In order for carbs to do their job the straighter the air entering the better. Some scoop issues are caused by no sealing the scoop to the hood which allows air to rush across the carb which is not good. Some scoops just cause too much air turbulence and mess with the carb signal. If you car runs better with no scoop try either adding a velocity stack on the carb plate or even adding an air filter! Both with help the air getting into the carb.

BTW, I think an air filter is key for normal bracket racing we do, even in a TD application. Too much crap in the pits along with dust can get in a motor with out one, scoop or no scoop. Their are plenty of good air fitters out there that do not hurt performance!

quote:

Originally posted by Tom Reyer:
https://youtu.be/EkpsydS8JXI

I've already ordered the salad bowl for 2018, lol.

Sorry that shyt funny. Gained 9 hp with salad bowl.How many housewives are running around going where in the heck is the salad bowl?
Loved the air cleaner lid upside down part.So it wasn't just to make my quadramess sound cool?

I know the drop base on my 69 panel 454 is history or its getting open top K&N with blanked off sides. That should really boost that smog control motor up.LMAO