Air flow through hood scoop

[What'saCobra?]

Ditto here, Anthony.

i would add that if you run slightly colder plugs, flame-outs can even happen in the summer, if you are a little careless and let the plugs get a little too fouled or use too much accel pump before hot starting.

The use of nominal foam is just simply a fire hazard in any semi-serious application. You can live with it, from time to time, but you get flame burns on the hood interior which is a PIA to clean-up nicely.

And it is a little embarassing to have the smoke and strange start-up noises
at a show or on a nice quiet street.

No-choke carbs are, as Morris indicates, the worse-case offenders. But, i like them for their nice flow characteristics and live in the South year-round. Morris knows of which he speaks.

Of course, they remind me of the old Webers on the race cars, that used to belch and flame a whole lot. Real loud. The IDA"s were not particularly easy to start even when warm.

i still prefer that bark and smoke of a Pratt & Whitney (lthough they cut-out inverted), rather than the fuel-injected Lycoming, as nice as they are in aerobatic utility.

It's just old time religion...

[Ant]

Morris,

Thanks, I can see the benefits of the reverse scoop, and being wider than my JBL styled scoop, if I went to a scoop like yours, then I could go to a 16" filter, but I will stick to my 14" x 3.5" K&N, as mentioned I dont think it will need anymore than 925cfm, and I wont be oiling this race filter. I like the look of your scoop, but I would like to like my car to be like it was in the 1960's, but these big forward facing scoops are ugly!

I guess I can just run a mesh in place of the filter element for extreme events, but crap is still going to enter the engine!

Aussis Mike,

Nice job you are doing there!!!

[DocDirk]

This has been an interesting post to be sure! I've seen some hood air scoops which are open on the rear side as well as the front, mostly larger ones customized to accommodate a larger engine setup. I've wondered whether the flow of air thru the scoop would have a chance of setting up a vacuum effect at some speed, potentially robbing the air intake? It's been said to me as well that such a scoop is used to aid in reduction of engine and engine compartment temperatures. Anybody have experience or an opinion?

Thanks!

Dirk