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Air Cleaner Swap on SU carbs

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Old 10-07-2004 | 09:09 AM
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altoaudio's Avatar
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Air Cleaner Swap on SU carbs

I'm dumber than dirt, so if I want to replace the stock air cleaner with 2 ea aftermarket cleaners, where do the vacuum lines on the top of the '72 SUs go??

Help!!
Old 10-07-2004 | 11:13 AM
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you have to drill holes in some of them, other wise you are going to have to custom fabricate something. i have the 2 k&n air cleaner assemblies, and what i did was drill holes for the carb vac lines (1 in each) and then one more in the front one for the little valve on the wheelwell.... i just put a cheapy little breather on my PCV valve and i disconnected my smog stuff... i used little rubber vacuum nipples from autozone to put in the holes i drilled to attach the lines to. if you want pics i can take some later... i have some but it's from the drivers side, so you won't be able to see the lines.. any questions let me know!
Old 10-07-2004 | 12:53 PM
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Thanks!!

I would love to see a few pics.

Merci en Louisianne

Brian
Old 10-09-2004 | 03:59 PM
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ok, i'll get to the pics asap.... also, which set-up are you going with?
Old 10-25-2004 | 03:33 PM
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Talking

Originally Posted by altoaudio
I'm dumber than dirt, so if I want to replace the stock air cleaner with 2 ea aftermarket cleaners, where do the vacuum lines on the top of the '72 SUs go??

Help!!
The '72 air cleaner is tuned for performance and you will actually loose performance by making the change. If you look at the base of the air box you will find the air horns , these provide a ram effect , If you disconnect the pcv valve the engine will build sludge and you mostlikely will smell the fumes in the cabin when driving ,especially with a window dowm. my 2 cts Gary
Old 10-25-2004 | 06:15 PM
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yes, i get the fume smell..... if you get the air horns (i got mine from MSA) they fit inside the k&n set-up. however, as i have learned, the difference in flow is slightly better from the twins as compared to the stock cleaner. it looks much nicer IMHO.... but it will set you back about $240 to get the cleaners and the air horns as compared to the $40 for the k&n replacement filter.... it's really up to you, tho.
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