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Old 05-03-2020, 11:12 AM
Dick Boneske's Avatar
Dick Boneske Dick Boneske is offline
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Default Dual Snorkle Air Cleaner for '76 Trans Am

We need a dual snorkel air cleaner for our '76 Trans Am. I know the factory air cleaner only had one snorkel, but we would like to use one with two. We have the original shaker scoop. We want the scoop to be functional. How can this be done with the air cleaner as requested above?

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Old 05-03-2020, 03:33 PM
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I made mine up for my 73 ... got an extra snorkel from somewhere and tacked it on
The end of the snorkel I had to modify to make them both look similar ..not perfect but acceptable
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Old 05-03-2020, 06:20 PM
tri.lllgto tri.lllgto is offline
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Default air clnr

You're going to have to use a 70/72 T/A air clnr. They are reproduced. I have some originals

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Old 05-04-2020, 12:17 AM
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If we work under the presumption that you are going to want to run as many period correct Pontiac/Firebird parts as possible , then the following needs to be considered.
You cannot use a pre-1973 Firebird air cleaner base with a post-1972 Quadrajet;
The choke pot hits the air cleaner.
your options are:
1) modify a 73-79 Firebird Pontiac 350/400/455 4bbl air cleaner base with a period correct carb.
2) use a pre-egr carb with a pre-egr Pontiac Quadrajet.

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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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Old 05-04-2020, 09:59 AM
78w72 78w72 is offline
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curious why you want a dual snorkel? the single wide snorkel with the cold air ducting is the best way to get fresh air to the motor. the dual air cleaner as pictured pulls hot air from the hottest part of the engine, right above the header/manifold. & if you plan to use a functional shaker, dual snorkels are kind of pointless as the shaker will pull the fresh air. unless youre really set on a custom dual look, the factory 75-79 T/A air cleaner is the best easiest option for fit & function.

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Old 05-04-2020, 04:09 PM
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Thank you for the info. We're using a '77 Quadrajet. I had no idea there is an issue with fitment with various Quadrajets.

Our interest in the dual snorkels is for appearance only. I understand that if we make the shaker scoop functional, the snorkels are not an issue for cold air into the engine.

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Old 05-04-2020, 06:43 PM
'ol Pinion head 'ol Pinion head is offline
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Quote:
Originally Posted by unruhjonny View Post
If we work under the presumption that you are going to want to run as many period correct Pontiac/Firebird parts as possible , then the following needs to be considered.
[b]You cannot use a pre-1973 Firebird air cleaner base with a post-1972 Quadrajet;
The choke pot hits the air cleaner...[b]
Disagree with you Jon. '73 455 Dport TransAms came with a dual snorkel aircleaner, one that attaches to a '73 bolt on shaker. The main difference between a '73 455 D-port dual snorkel base & one from earlier ('70 RA4 T/A base & '71-72 T/A base), is that the '73 version does not have the passenger side chimney. A '70 Formula base or a '71-72 T/A base will fit right on a '73 or '74 Pontiac Q-jet, just confirmed the fit on my late '73 T/A's original engine with its original 7043265 Qjet & with an SR SD Q-jet.

Late '70's Pontiac Qjets, on the other hand, have a different design airhorn with the vent protrusion located in slightly different spot & that's where repositioning the mating hole, comes into play, in order to use an earlier aircleaner base or asm. Mike Ransom has posted pics before of the minute differences in the bases of the large mouth '73 (SD) through '79 W72 aircleaners. Have examples of all of the bases as well.

Dick, on 3 occasions Ive supplied a wide mouth Pontiac donor snorkel to T/A owners that have contacted me over the years desiring to make a dual large mouth snorkel T/A aircleaner for their car. Basically a Pontiac version similar to a late '70's L82 Vette aircleaner. While this can be done, there are quite a few issues. First, it's best the late 70's Bird is a factory non AC car as room is at a premium for the pass side snorkel. Next, will need a straight on style plastic snorkel adaptor (reproduced) & then it becomes an issue of what flex duct, & where is the flex duct going to be routed to on the front passenger side. have only seen clean results from one of these deals & the owner fabbed a "zip tube" out two molded plastic ducts.

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Old 05-04-2020, 11:18 PM
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unruhjonny unruhjonny is offline
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Quote:
Originally Posted by 'ol Pinion head View Post
Disagree with you Jon. '73 455 Dport TransAms came with a dual snorkel aircleaner...
I say this respectfully;

I believe you are mistaken.

The 1973 Trans Am did not come with a dual snorkel air cleaner.



Last time I checked, an OE 1971-1972 Firebird dropped base air cleaner did not have clearance for a 1973+ carburetor's hot air choke mechanism;
A 1971-1972 GTO/Full sized car air cleaner would, but those are not dropped base aircleaners, and will set the shaker too high.

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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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Old 05-05-2020, 07:30 AM
'ol Pinion head 'ol Pinion head is offline
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Quote:
Originally Posted by unruhjonny View Post
I say this respectfully;

I believe you are mistaken.

The 1973 Trans Am did not come with a dual snorkel air cleaner....

Last time I checked, an OE 1971-1972 Firebird dropped base air cleaner did not have clearance for a 1973+ carburetor's hot air choke mechanism;
A 1971-1972 GTO/Full sized car air cleaner would, but those are not dropped base aircleaners, and will set the shaker too high.
The pic you up Jon is that of a Super Duty. '73 Super Duty's came out late in the model year & indeed received the clamp on style closed style shaker, snorkel adaptor, hairy hose, & zip tube assembly. '73 455 D-port T/A's had the bolt on style shaker top with tabs on a dual snorkel single heatriser base. No clearance issues here with any choke pieces with original factory parts & have a large supply of factory aircleaners & original Pontiac Qjets.. As mentioned earlier, took one of several Formula Dport dual snorkel bases & the one I grabbed sets right on/locates properly on the original 7043265 Q-jet on the engine from my '73 BG car. That particular dual snorkel base fits no differently than the original base from my 72 T/A when installed on the '73's Q-jet.

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Old 05-05-2020, 09:28 AM
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unruhjonny unruhjonny is offline
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I say this as respectfully as possible;

Once again you are mistaken.

All 1973 air cleaners were the same style.

I am actually quite surprised you are making this argument.

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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)

Last edited by unruhjonny; 05-05-2020 at 09:36 AM.
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Old 05-05-2020, 02:03 PM
71HOT/A 71HOT/A is offline
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To op if you can handle a little fab work I have a dual snorkel air cleaner that the lower part is rusty but the snorkels look good. Just drill out 4 spot welds and swap them to yours. You would have to cut another opening in your base if you wanted to make both snorkels functional. I can even drill them off to save on shipping.

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Old 05-05-2020, 10:44 PM
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muscle_collector muscle_collector is offline
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roger, im not sure what you are talking about on the 73 ta's. as you know I have owned too many to count 73 ta's and never had one with a dual snorkel.

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Old 05-09-2020, 09:03 AM
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Are you looking for something like this? My 76 T/A. If so, I took the 76 air cleaner and modified. I welded two snorkels on it. I also modified the lid. The Air filters fit very nice on these units because of the shaker. It's tapered so it goes inside the scoop nicely.
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Old 05-09-2020, 07:14 PM
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Quote:
Originally Posted by chuckies76ta View Post
Are you looking for something like this? My 76 T/A. If so, I took the 76 air cleaner and modified. I welded two snorkels on it. I also modified the lid. The Air filters fit very nice on these units because of the shaker. It's tapered so it goes inside the scoop nicely.
Same thing as mine Charles I could use another lid to modify better than the one I have ....looks good
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1973 Firebird Navajo Orange w/shaker,1973 400/461,1972 Intake SD CNC'd,1977 Q-Jet 800 CFM w/ Cliffs Kit,Tanks Inc PA4 255 Walbro intank pump ,-8an feed/return,RobbMc Regulator,RobbMc 40 micron filter,253 CFM 6x-8's w/H.S 1:5 Roller Rockers,SD Stump Puller H/R Cam 230/236 @.050 112 lobe separation 565/.570 lift,Crower Solid Rollers,28150 Hedman Headers,3" exhaust,full tailpipes,350 Turbo,9.5" 3200 Converter,3:42 gear,8.5 posi,C/E slide-alinks,Koni adj frt shocks,Best 12.18@110.55 Lookin for 11's
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