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Topic: 14' offset dropbase air cleaner base needed.

in Forum: C3 Engines


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Re: 14' offset dropbase air cleaner base needed. (10/20)
 1/24/14 11:45pm
daveo76
Former Member
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Vancouver, WA - USA

Vette(s):
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

Joined: 8/25/2005
Posts: 857

Gary: I cut out the bottom of my original big old GM closed element housing and used it as the drop base for a 12" air filter element.  What I ended up with was just a 12" diameter plate that sits on the carb air horn and drops the element down an inch or two.  On top of the element I used a stock-style air cleaner lid from a '73-'75.  ('76 and later used a closed element system - my original lid was too big).

One of the reasons this issue comes up so often is the vast majority of aftermarket air cleaner systems use 14" diameter elements.  There are some 10" aftermarket products out there, but very few 12" systems -- most of our cars came with 12" element systems.  As Joel points out, it is not only the overall height of the air cleaner you have to be concerned with, but where the front of the air cleaner will be in relation to the slope of the hood.  My first plan almost worked, but there was hood interference only where the hood contacted the front of the air cleaner.  (I used my daughter's play doh to check)   I solved the problem by going back to the smaller 12" open element and using the lid from the older cars.  And that also solved an aesthetic dilemma I was having since I really  just wanted a simple black top.   (I don't go for a lot of chrome in my engine bay) 

Hope that explains it further....


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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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Re: 14' offset dropbase air cleaner base needed. (11/20)
 1/24/14 11:48pm
daveo76
Former Member
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Vancouver, WA - USA

Vette(s):
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

Joined: 8/25/2005
Posts: 857

Joel and I posted at almost the same time. Smile  Joel, you're absolutely right, except I think you might have assumed I have an early 76 that came originally with the cowl induction.  It actually came with the closed element system, but it doesn't really change the story at all.  I think the air cleaner elements were the same dimensionally between the two designs.....

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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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Re: 14' offset dropbase air cleaner base needed. (12/20)
 2/10/14 9:36pm
Case75
Former Member
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, - Canada

Vette(s):
1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.

Joined: 6/19/2012
Posts: 230

I received the air cleaner base the other day and installed it. Works perfectly and clears the electric choke and throttle linkages just fine on the Edelbrock 1806 carb. It clears the hood on my '75 even better then the base I had before.





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Build Date: May 7, 1975. 383 w/267 RWHP/310 RWTQ
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Re: 14' offset dropbase air cleaner base needed. (13/20)
 2/11/14 12:20am
daveo76
Former Member
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Vancouver, WA - USA

Vette(s):
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

Joined: 8/25/2005
Posts: 857

Glad it worked, Greg!  Any pics available yet?  

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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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Re: 14' offset dropbase air cleaner base needed. (14/20)
 2/11/14 6:56am
Case75
Former Member
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, - Canada

Vette(s):
1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.

Joined: 6/19/2012
Posts: 230

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Re: 14' offset dropbase air cleaner base needed. (15/20)
 2/11/14 8:31am
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20129

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Re: 14' offset dropbase air cleaner base needed. (16/20)
 2/11/14 9:06am
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 2388

Ermm  O.K. Gents. You have conquered a dilema in that area, NOW, does the same possibility exist on a '72 with an even lower hood line. I would like to remove a Q-jet that no one seems to be able to keep working correctly, and put on a E-brock with the needed plate under it. I know my options are next to nill, but am getting discourged.

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Re: 14' offset dropbase air cleaner base needed. (17/20)
 2/11/14 9:17pm
Case75
Former Member
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, - Canada

Vette(s):
1975 Corvette 383 stroker w/Patriot 190 heads, Eagle stroker kit, Comp 279TH7 cam, DUI distributor, Edelbrock 7116 intake, Edelbrock 1806 carb, Hedman Hedders, TH400 w/TCI Breakaway 2400 stall, Transgo 1-2 shift kit.

Joined: 6/19/2012
Posts: 230

manchestershark said: Ermm  O.K. Gents. You have conquered a dilema in that area, NOW, does the same possibility exist on a '72 with an even lower hood line. I would like to remove a Q-jet that no one seems to be able to keep working correctly, and put on a E-brock with the needed plate under it. I know my options are next to nill, but am getting discourged.

If you install an Edelbrock 2101 Performer intake you won't need the adapter plate which would keep things a bit lower. It should fit fine under the '72 hood. The reason I needed the drop base is I'm running a 7116 Performer RPM Vortec intake which is higher than stock.



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Build Date: May 7, 1975. 383 w/267 RWHP/310 RWTQ
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Re: 14' offset dropbase air cleaner base needed. (18/20)
 2/11/14 9:24pm
F4GaryGold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 1409

manchestershark said: Ermm  O.K. Gents. You have conquered a dilema in that area, NOW, does the same possibility exist on a '72 with an even lower hood line. I would like to remove a Q-jet that no one seems to be able to keep working correctly, and put on a E-brock with the needed plate under it. I know my options are next to nill, but am getting discourged.

Send your Q-jet to Lars (the Corvette Forum guy).  He is a master with the Q-jet.  Just post a thread asking about it in the C3 section.



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Re: 14' offset dropbase air cleaner base needed. (19/20)
 2/12/14 9:18am
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 2388

 
           THANKS!


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Re: 14' offset dropbase air cleaner base needed. (20/20)
 3/21/15 5:32am
alohajohn
Former Member
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Vette(s):
1972 T Top, Mille Miglia Red, auto, ac, power windows, power steering, tilt/tele, power brakes, black leather..

Joined: 3/10/2013
Posts: 24

I had a similar problem with my '72 after I had my engine rebuilt and swapped out the original worn Q Jet for a new Holley & HEI ignition. The stock [my preference] twin snorkel air cleaner would not fit so I had to go aftermarket but to fit under the hood plus clear the HEI distributor I had to get a recessed air cleaner base and adjust it's location until it cleared the Holley throttle & choke fittings. I still had clearance issues with the wing nut so I ground it down until it longer touches the underside of the hood, it has a 3 inch filter. It's not exactly the result I wanted but it does look Ok..

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