Drop Base Air Cleaner
Thread Starter
Drifting
Joined: Jan 2002
Posts: 1,645
Likes: 11
From: Schaumburg IL
Drop Base Air Cleaner
I keep hearing the "drop base air cleaner" all the time. I have a standard 14" Chevy or GM type that has some drop but maybe there is something the drops more over the carb. Can someone direct me to say Summit, Jegs or a Vette parts catalog for the deepest drop that works. Thx
Melting Slicks
Joined: Dec 2006
Posts: 2,669
Likes: 3
From: Kingston Ontario
What carb?
http://www.knfilters.com/Racing/14inch.htm
For a 1" drop:
http://www.summitracing.com/search/P...rd=filter+drop
Need more than 2":
http://www.jegs.com/i/Proform/778/66808/10002/-1
http://www.knfilters.com/Racing/14inch.htm
For a 1" drop:
http://www.summitracing.com/search/P...rd=filter+drop
Need more than 2":
http://www.jegs.com/i/Proform/778/66808/10002/-1
Last edited by dannyman; Feb 6, 2010 at 08:31 PM. Reason: add summit
Drifting
Joined: Sep 2006
Posts: 1,986
Likes: 21
From: Columbus MN
I have a 1 1/2" drop base on a GM 350 HO crate with a Holley carb under a stock '80 hood with just barely enough clearance. I can't use an air cleaner stud with a wing nut. My air cleaner lid is held down with a 1/4" stainless steel flat head machine screw.
Drifting
Joined: Sep 2006
Posts: 1,986
Likes: 21
From: Columbus MN
The shape of the bottom of drop bases vary quite a bit I don't have any throttle linkage clearance issue with my combo, but I had bought and returned a different drop base for that reason.
Burning Brakes
Joined: Apr 2009
Posts: 807
Likes: 2
From: VIRGINIA BEACH VIRGINIA
I have a drop base air cleaner I will sell you (just the bottom). It is about 2- 2 1/2 inches. I switched carbs and spacer so i don't need it any more.
dangoodva@yahoo.com
dangoodva@yahoo.com
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Drifting
Joined: Apr 2008
Posts: 1,305
Likes: 2
From: Lewisburg WV
thegazman
I bought an off set aluminum dropped based air cleaner base off of ebay for $15. The off set clears my distributor and the drop gives me approximately 1 1/4" clearance between my filter top and the hood liner. The off set works well on my q-jet carb. I don't know about any other carb.
Drifting
Joined: Oct 2005
Posts: 1,527
Likes: 148
From: East London/SW Essex UK
GM drop base I believe is the lowest available, OK with Quadrajet and Holley DP (just!) - as soon as you use 'billet' throttle brackets its too high and interferes with base - I ended up using the less radical Edelbrock drop base - but had to use a 2" air filter instead of 3" to get clearance with BBC/Air Gap inlet?L88 hood. Used air filter 'top' cover to replace lost flow with 2" filter.
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
You can't go wrong using a GM drop base from a different year/engine but same body style.
That's what I did with my '72 LS-5. I'm using one from a '70 LS-5. Same engine dimensions, hood, etc.
cc
That's what I did with my '72 LS-5. I'm using one from a '70 LS-5. Same engine dimensions, hood, etc.
cc
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
My drop base sits directly on the carburetor.
cc
Safety Car
Joined: Apr 2000
Posts: 3,802
Likes: 61
From: Wichita KS
I am surprised you can fit a 2" spacer between your air cleaner base and the carburetor without hitting the hood.
cc
Team Owner
Joined: Jul 2004
Posts: 40,404
Likes: 791
From: Redondo Beach, California
I bought a Morosco drop base air cleaner. It's aluminum. Cost a little over $30. I only use the lower (bottom) cover and use the stock air cleaner lid. The air cleaner looks very stock. I have a ZZ4 in my 68 and I got the drop base to lower the air cleaner a little to fit under my stock 68 hood. (Don't know if it was really necessary though).
