Don't underestimate the intake!
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Logistics Pro
Joined: Mar 2006
Posts: 3,678
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From: Rapid City SD
Don't underestimate the intake!
Had a AFE stage 1 that had restriction under load, even after cleaning. Clay @ Riffraff suggested the 6637 mod. That made more of a difference than going to the AFE did from the stock. Thanks!!! 
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Logistics Pro
Joined: Mar 2006
Posts: 3,678
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From: Rapid City SD
Don't have gauges yet, but seems to have a noticeably quicker throttle response. Just seems to breath better. Like changing from a dirty filter to a new one. Will see what happens with mpg's when I go across the state in a couple weeks...
Hotshot
Joined: Jan 2008
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From: Rochdale MA
Fleet Owner
Joined: Jun 2004
Posts: 25,090
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From: Rio Rico, AZ.
There's been some pretty "lively" discussion in the past between the people who tried the 6637 filter in the real world and another person who is really into math and graphics.
The engineer refused to believe that the Napa filter was doing a better job than all the rest of the options out there.
The engineer refused to believe that the Napa filter was doing a better job than all the rest of the options out there.
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
There's been some pretty "lively" discussion in the past between the people who tried the 6637 filter in the real world and another person who is really into math and graphics.
THAT engineer refused to believe that the Napa filter was doing a better job than all the rest of the options out there.
THAT engineer refused to believe that the Napa filter was doing a better job than all the rest of the options out there.
There... fixed that for you, Dan. There are other engineers in here who have seen that the labratory/computer mathematics simply do not always work out as expected in the real world. Keep in mind, though, that it's not necessarily because of bad math, just having to assume that some things are constant so the equations can work when in reality a lot of those values are not so constant in the real world.
Post Fiend
Joined: Feb 2008
Posts: 10,977
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From: Lancaster, Pa.
I'm suprised Clay didn't mention the S-B CAI setup, it was part of that study Dan and Pete mentioned above 
. Good deal on the 6637 though, that thing breathes some air.
. Good deal on the 6637 though, that thing breathes some air.
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Logistics Pro
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From: Monterey Bay, CA
Mike, If I weren't so happy with the 6637 (translation: I'm broke), I'd be running the S&B too. Its on my list