Air Flow Problem

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Jul 23, 2010 | 09:46 AM

#16

RIKIL

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Joined: Sep 2008

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Quote:

Originally Posted by Conanski

Just looked at your pic, this may not be your whole problem but you should have a section of pipe on the intake side of the MAF sensor to level out the air column, placing it on the end like that typically produces unstable MAF voltages, that's also one of the reasons why attaching an open air filter right on the end of the meter is also a bad idea.

Yeah, I know what you are saying, I have been talking about that with the various people that I have called. I can put a length of tubing on the end but I don't think it will make a difference. I was told I should at least test it like this, one of the guys thinks that the conical filter I am using was causing an issue. I just make sure that nothing goes in to the system like leaves.

When I talked to IST today, he wanted me to do the one test I mentioned in my last post and then he was thinking I might need a new calibration tube for my sensor (depending on the test results).

Jul 23, 2010 | 10:05 AM

#17

lew52

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Im not sure what kind of meter your running , but there are several calabrations for the meters , if you run a conical filter it needs to be calabrated for it , same goes for cold air set ups that have a elbow on them different calabration , i never heard of not putting a conical filter on the end of a meter , thats the way most are set up , my pro m meter has a filter that comes with the meter its the only filter that can be used on this meter & it has studs on it that go thru the flange of the meter & bolt , the meter needs to be straight up 12 oclock & level...Lew

Jul 23, 2010 | 11:00 AM

#18

Conanski

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Joined: Jun 2006

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From: Ottawa, Ontario

Quote:

Originally Posted by lew52

i never heard of not putting a conical filter on the end of a meter , thats the way most are set up

Yep I agree.. but that doesn't make it right. I saw a dyno test of this type setup once that demonstrated a dramatic difference in MAF voltage stability(at idle and low rpms) when the meter was spaced 8-10" away from the filter versus right next to it. Once the engine is sucking big air it doesn't matter of course.