BHAF restriction caused by "reinforcing" ABS pipe

BHAF restriction caused by "reinforcing" ABS pipe

06-04-2002, 01:37 PM

#1 (permalink)

jlccc

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Join Date: Nov 2001 Location: Utah Posts: 277

BHAF restriction caused by "reinforcing" ABS pipe

I myself haven't had any trouble with the intake hose coming off of the filter neck. But, since several members have, I thought I would at least look at the 3" ABS coupling that several members have reported using. Apparently the idea is to stiffen the filter outlet neck so it can't deform and allow the intake hose to come off.

Have any of you gentlemen considered the reduction in x-sectional area caused by use of this coupling/reinforcing? I haven't taken accurate measurements yet but I estimate the diameter of the intake is reduced by nearly 1/2". The reinforcing piece of ABS essentially becomes an orifice plate, negating to some degree, the reason why you installed the BHAF in the first place, namely to flow more air.

I believe that with careful installation of the intake hose on the filter neck, reinforcement is neither necessary or desirable. At least that's the case on the Fleetguard BHAF which is the one I'm using.

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