Help for the restrictive "dual snorkel" air cleaner, '63-'65 250/300 HP 327s

[Duke W.]

A recent chassis dyno test of a "Special 300 HP" engine configuration revealed that this dual snorkel air cleaner is very restrictive. Initial discussion is in the following thread:

https://www.forums.ncrs.org/showthre...ecial-camshaft

The same post is on the Corvette Forum with more discussion:

https://www.corvetteforum.com/forums...-camshaft.html

Also on the CF is a thread on an inexpensive and easily reversible fix for this problem, and it will also introduce you to Baldwin filters if you are not currently familiar with them.

https://www.corvetteforum.com/forums...p-engines.html

Duke

[Edward J.]

Re: Help for the restrictive "dual snorkel" air cleaner, '63-'65 250/300 HP 327s

Duke what do you think of reversing the lid?years ago this was common.

[James W.]

Re: Help for the restrictive "dual snorkel" air cleaner, '63-'65 250/300 HP 327s

When I bought my '64 in 1980, the previous owner had drilled evenly spaced, 1/4 inch diameter holes on the vertical outer perimeter and the outer horizonal bottom of the dual snorkel base for more air. Probably not a big increase in air volume, but better than the stock configuration. I replaced it with a correct original one for flight judging. Wish I wouldn't have sold it now that the car is done being flight judged.

I wouldn't mind the mod shown on the CF, but I don't think it looks good, maybe a slightly shorter air filter to reduce the gap wouldn't look as bad. I get the functionality, just no pleasing to the eye.

James

[Duke W.]

Re: Help for the restrictive "dual snorkel" air cleaner, '63-'65 250/300 HP 327s

Duke what do you think of reversing the lid?years ago this was common.

Yes, I remember doing that from my high school years, but don't know if it will seal properly on your engine. Give it a try.

There's a new post on the CF air cleaner thread... took an old base that was missing one snorkel, removed the other and drilled several 1 3/8" holes around the back side of the base.

The OE filter element is on the small size - only about half the filter area of the 3 x 14" element used beginning in '66. The PA2009 is maybe halfway between.

Duke