Air Intake Whistling - JeepForum.com

 
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post #1 of 6 Old 05-14-2012, 06:46 PM Thread Starter
Griffen24
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1979 CJ5 
 
Join Date: May 2012
Location: Lakeland
Posts: 114
Air Intake Whistling

1979 CJ5 I6 258 runs well on it's basic single brl carb, however when ever I really press the throttle down I get a very loud whistling coming from the air intake. The harder I press the throttle, the louder it gets until acceleration levels off. I have taken the air cleaner off and tracked the sound to the air intake. At this point I have no idea how to stop this whistle. Anybody have any suggestions to what I could try to stop this whistle?

Please note in the pic I have replaced the plugs with vacume caps on the Inlets/outlets on the carb not in use.

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post #2 of 6 Old 05-14-2012, 11:32 PM
jnicewan
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1995 ZJ 
 
Join Date: Dec 2010
Location: Norman
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Get a closed air filter housing, what I mean is a stock type filter housing with the snorkel/funnel type tube on it. Open element filters make noise under heavy throttle/load that is basically why the factory designs filter housing for noise. Other than for noise that filter setup is very prone to water/mud debris which could ruin your day of fun when splashing through puddles etc and gets into the engine. Also the filter setup is getting nothing but hot engine air, a factory type filter housing with proper ducting can be setup to get cooler air and also put in a place to shield water/mud, I think the factory air intake was a square opening right beside the LH headlamp.
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post #3 of 6 Old 05-17-2012, 08:22 PM Thread Starter
Griffen24
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Join Date: May 2012
Location: Lakeland
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Thank you, that makes sense as I do see the vent port on the interior of the grill on the drivers side where the breather would attach. Any suggestions where to procure a replacement filter housing and breather? I have been searching online and have had no luck as of yet. I may have to go junk yarding and peice me togehter something.
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post #4 of 6 Old 05-18-2012, 12:34 AM
jnicewan
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1995 ZJ 
 
Join Date: Dec 2010
Location: Norman
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I would probably just go to a scrap yard that has older vehicles. You may not need to find a jeep though, a lot of 1 & 2 barrel carbs had the same size opening for air filter bases. maybe test fit it first or measure it for fit. You really dont need to rush out and change that filter design, unless the noise is really bothering you or you plan to spalsh through deep water/mud.

You might try places like 4wd.com or quadratec.com too
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post #5 of 6 Old 05-18-2012, 06:25 AM Thread Starter
Griffen24
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1979 CJ5 
 
Join Date: May 2012
Location: Lakeland
Posts: 114
Thanks jnicewan, yeah the noise is horrible! When in third and pushing the gas, the sucking/whistle is louder than the motor/exhaust.
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post #6 of 6 Old 05-19-2012, 02:11 AM
jnicewan
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1995 ZJ 
 
Join Date: Dec 2010
Location: Norman
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Some people prefer that kind of sound, most cold air induction kits cause it too. I will admit it sounds cool on most v8 engines but not so much on a 6.
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