1969 Corvette Air Cleaner
Thread Starter
Navigator
Joined: May 2011
Posts: 9
Likes: 0
From: Virginia Beach Virginia
1969 Corvette Air Cleaner
I'm new to the Corvette Community. Just purchased a 1969 Corvette with L46 350 4 Speed. The car needs alot of TLC.
The original Rochester carburetor was missing so I purchased a Holley 0-80555C Model 4175 650 CFM Spread Bore 4-Barrel Vacuum Secondary with Electric Choke.
I am trying to find an air cleaner that will fit the holley carb and the ability to hook up the crankcase vent while providing the clearance for the hood. Does anyone have any suggestions on what air cleaner will work?
The original Rochester carburetor was missing so I purchased a Holley 0-80555C Model 4175 650 CFM Spread Bore 4-Barrel Vacuum Secondary with Electric Choke.
I am trying to find an air cleaner that will fit the holley carb and the ability to hook up the crankcase vent while providing the clearance for the hood. Does anyone have any suggestions on what air cleaner will work?
Team Owner
Joined: Sep 2006
Posts: 31,285
Likes: 4,374
From: Westminster Maryland
Hi S,
New, OLD, 69 NICE!
The spread-bore is a popular change for q-jets, but I don't think there's an open air cleaner base with the vent tube that clears the rear accelerator pump lever.
I remember reading that there's a way to bend the lever to clear the tube, but I'm not sure just how to do it.
Perhaps someone else will.
Regards,
Alan
PS: I just read Mel's suggestion.. while a logical one, I believe the 'layout' of the LT-! Holley is different from the spread-bore Holley layout, so the LT-! base isn't the quite the answer. The difference involves the LT-! Holley being a dual feed, while the spread-bore Holley is a single feed.
New, OLD, 69 NICE!
The spread-bore is a popular change for q-jets, but I don't think there's an open air cleaner base with the vent tube that clears the rear accelerator pump lever.
I remember reading that there's a way to bend the lever to clear the tube, but I'm not sure just how to do it.
Perhaps someone else will.
Regards,
Alan
PS: I just read Mel's suggestion.. while a logical one, I believe the 'layout' of the LT-! Holley is different from the spread-bore Holley layout, so the LT-! base isn't the quite the answer. The difference involves the LT-! Holley being a dual feed, while the spread-bore Holley is a single feed.
Last edited by Alan 71; Nov 3, 2011 at 04:46 PM.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Plenty of guys are running a Holley Spread Bore so you may need the 68-72 clearance & which air cleaners fit. The aftermarket open element air cleaners have a connection in the base for crankcase vent or a breather is used. You may need to do another topic on Holley Spread Bore 68-72 air cleaners.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Navigator
Joined: May 2011
Posts: 9
Likes: 0
From: Virginia Beach Virginia
Thanks for the advice. I posted another topic. Will see if this yeilds any fruit..
Plenty of guys are running a Holley Spread Bore so you may need the 68-72 clearance & which air cleaners fit. The aftermarket open element air cleaners have a connection in the base for crankcase vent or a breather is used. You may need to do another topic on Holley Spread Bore 68-72 air cleaners.
Drifting
Joined: Apr 2007
Posts: 1,970
Likes: 45
From: Cameron Park CA
I'm new to the Corvette Community. Just purchased a 1969 Corvette with L46 350 4 Speed. The car needs alot of TLC.
The original Rochester carburetor was missing so I purchased a Holley 0-80555C Model 4175 650 CFM Spread Bore 4-Barrel Vacuum Secondary with Electric Choke.
I am trying to find an air cleaner that will fit the holley carb and the ability to hook up the crankcase vent while providing the clearance for the hood. Does anyone have any suggestions on what air cleaner will work?
The original Rochester carburetor was missing so I purchased a Holley 0-80555C Model 4175 650 CFM Spread Bore 4-Barrel Vacuum Secondary with Electric Choke.
I am trying to find an air cleaner that will fit the holley carb and the ability to hook up the crankcase vent while providing the clearance for the hood. Does anyone have any suggestions on what air cleaner will work?
In this photo you can see the stainless pipe I fitted to my base. (I saved the original base, and used one I bought when the engine went together.)
Thread Starter
Navigator
Joined: May 2011
Posts: 9
Likes: 0
From: Virginia Beach Virginia
Thanks. Very sharp engine compartment.
As far as I can tell, all '69s and 70s with 4 barrel carbs (Q-jet or Holley) used the same open element air cleaner. As Alan correctly stated, the base will not clear a double pump Holley because the accelerator pump lever interferes with the breather pipe for the PVC system. It doesn't interfere with the PVC itself, just the pipe that supplies fresh air from the air cleaner assembly to the engine. You might try to find somebody nearby who had a stock open filter and try the base on your Holley. My bet is that it will fit. Because I am running a double-pump Holley, I am using a stock base modified with a thin stainless tube instead of the thicker rubber hose for the clean air supply. Otherwise the stock base fits a Holley with center hung floats just fine on.
In this photo you can see the stainless pipe I fitted to my base. (I saved the original base, and used one I bought when the engine went together.)
In this photo you can see the stainless pipe I fitted to my base. (I saved the original base, and used one I bought when the engine went together.)
Team Owner
Joined: Sep 2006
Posts: 31,285
Likes: 4,374
From: Westminster Maryland
Hi,
When I had a spread-bore on my 71, 350-270 I used an open air cleaner but never found a base that would allow the crank-case breather to be properly hooked up.
The hose ends under the base,with the flame arrestor pushed on it.
Regards,
Alan.
PS: In 71 the open base also interferes with the CEC solenoid.
When I had a spread-bore on my 71, 350-270 I used an open air cleaner but never found a base that would allow the crank-case breather to be properly hooked up.
The hose ends under the base,with the flame arrestor pushed on it.
Regards,
Alan.
PS: In 71 the open base also interferes with the CEC solenoid.
Drifting
Joined: Sep 1999
Posts: 1,970
Likes: 91
I ran a holley spredbore DP on my 70 L-46 for awhile. No way the stock drop A/C base works. Used a aftermarket open element that sat way up on the airhorn. Clearance didn't matter since I had an L-88 hood at the time.
The spreadbore has other issues that the stock LT1 holley does not with regard to clearance. The other thing to remember is the LT1 holley sits under a LT1 hood with more clearance than the stock hood
The spreadbore has other issues that the stock LT1 holley does not with regard to clearance. The other thing to remember is the LT1 holley sits under a LT1 hood with more clearance than the stock hood
