Thoughts on intake flow rates etc......and filters. - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-10-2004, 10:11 PM   #11
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Quote:
Originally Posted by PontiacDad
The Boost Control Solenoid is kind of a clutch as removes much of the boost and frees up engine power when its not needed (while in reverse, idle)?
Yeah its another way of doing things...I'm just kind of curious how the whole clutch system works though. I mean just stopping the supercharger only does so much and I can't imagine the little BCV being big enough...I dunno.

So just to slide back on topic for a sec...was this news to anyone or did I think up yesterdays news?
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Old 09-10-2004, 10:37 PM   #12
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I found a good article on the drop in filter only theory. Its not a bonneville but it is a super charged car and I like the test instruments they use
http://www.autospeed.com/cms/A_2232/article.html
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Old 09-10-2004, 10:42 PM   #13
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Quote:
Originally Posted by PontiacDad
I found a good article on the drop in filter only theory. Its not a bonneville but it is a super charged car and I like the test instruments they use
http://www.autospeed.com/cms/A_2232/article.html
hmm...interesting...is it not true you get less gas mileage with a clogged filter? I've never paid attention to the mileage
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Old 09-11-2004, 12:52 AM   #14
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Quote:
Originally Posted by DrJay
Quote:
Originally Posted by PontiacDad
I found a good article on the drop in filter only theory. Its not a bonneville but it is a super charged car and I like the test instruments they use
http://www.autospeed.com/cms/A_2232/article.html
hmm...interesting...is it not true you get less gas mileage with a clogged filter? I've never paid attention to the mileage
I think what the article shows is that the filter has to be really clogged before it restricts flow, notice how no filter only gained 0.5 of water over a dirty one? The other thing to note is the need for an improved air intake and not just a replacement filter?
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Old 09-11-2004, 12:57 AM   #15
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Which readings?
g/* from the MAF to measure increased flow, duty cycles to try to mathmatically evaluate MPG difference, maybe throttle response time...
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Old 09-11-2004, 01:12 AM   #16
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Screw mileage.

We'll do something with this for sure. I may be back up in WA soon. (where my damn scantool and FSM'* still are ). Hopefully DrJay will have his fuel pump replaced by then.

If nothing else, he can take a series of readings, send me my stuff back when he'* done, and I can try to duplicate it. We have very similar setups now, and we can both try to swap in our stock boxes for comparison. We'll have data within a month without a doubt.

Great topic again.
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Old 09-11-2004, 08:59 PM   #17
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so if there is no pressure drop, how does a new filter help?
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Old 09-13-2004, 11:55 AM   #18
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You know I've always thought of a performance filter as a dyno-proven product. At the local parts store there is a demo with two small fans pulling air through a filter and blowing a ping-pong ball up a tube. Putting the fram filter on it drops the ball to about half way or lower, replace it with the K&N and it flies back to the top. It seemed that if it made a difference with those two tiny fans and a lightweight ball, surely it would make a difference when the cfm'* hit the triple digits....

I started doing my homework and the evidence so far backs up what PontiacDad has found:
http://www.hotrod.com/techarticles/70738/

hmm...
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Old 09-13-2004, 12:18 PM   #19
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One thing I'd liked to have seen them try is varying the filter surface area. And maybe try it on a car with forced induction.
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Old 09-13-2004, 12:27 PM   #20
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Quote:
Originally Posted by willwren
One thing I'd liked to have seen them try is varying the filter surface area. And maybe try it on a car with forced induction.
Why forced induction?
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