T O P I C R E V I E W
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1quik69
Member # 5481
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posted
A friend of mine and I are having a disagreement on air cleaner sizes. He has a 67 gt with a 390 in it. He currently is running a 14x3 unit but wants to switch to a 6x3 unit. The smaller unit matches his valve covers better. I say going to the smaller one will affect his overall performance as well as idle speed etc. He says the only affect it will have is decreased surface area for filtering. I have never seen any tests on this subject. What do you folks think?
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porchstang
Member # 7937
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posted
Depends on the air cleaner too. But no he shouldn't see any really noticable decrease.
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Thirteen Twenty
Member # 7961
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posted
I would deff think it would effect his performance. more so depending on the size carb and air requirements of the engine. As well as forcing the air to make a sharper turn into the carb,I'm not going to go into that but it's the theory behind these two products. http://store.summitracing.com/partdetail.asp?autofilter=1&part=KNN%2D85%2D0200&N=700+4294925239+4294839057+115&autoview=sku http://store.summitracing.com/partdetail.asp?autofilter=1&part=KNN%2D61%2D6000&N=700+4294925239+4294839057+115&autoview=sku your best bet is to hook up a vaccume gauge to the inside of the air cleaner (nipple on the base plate) and read the vaccum at W.O.T. to see if the air cleaner is a restriction.
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