6637 vs. AFE - Ford Powerstroke Diesel Forum
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post #1 of 20 Old 12-28-2011, 08:21 PM Thread Starter
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6637 vs. AFE

Hey all, I am currently using a AFE intake housing with a K&N filter but have just read terrible terrible things about the K&N filters. Should I switch it out? Ive hear you can get surge from the 6637.

I am running a late 99' Powerstroke (emblem on the door)

1999 F-250
TS 4 Pos Chip(50-75-100-140)
AFE air intake with K&N filter
5" Exhaust
3 Pillar pod (Pyro, EGT, Boost)
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post #2 of 20 Old 12-29-2011, 05:51 AM
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nothin will filter as well as a 6637, and it will flow plenty
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post #3 of 20 Old 12-29-2011, 06:35 AM Thread Starter
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Thanks for the info, but does it cause turbo surge?

1999 F-250
TS 4 Pos Chip(50-75-100-140)
AFE air intake with K&N filter
5" Exhaust
3 Pillar pod (Pyro, EGT, Boost)
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post #4 of 20 Old 12-29-2011, 08:33 AM
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It can, but a lot of upgraded filters can cause it. I haven't had any problems yet, but if it does start pick you up a wicked wheel. It'll fix the surge (most of the time) and give you a pretty sweet sounding turbo whistle.

Cody Ryan
03 f250 ccsb fx4 7.3
4" RC lift
35x12.50 federals on 20x12 rockstars
6637 intake, straight pipe
full RR w/ fuel bowl delete.
rebuild coming soon


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post #5 of 20 Old 12-29-2011, 09:02 AM
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Quote:
Originally Posted by Sgt. Stroker View Post
Thanks for the info, but does it cause turbo surge?
No.

Quote:
Originally Posted by bruce51d View Post
nothin will filter as well as a 6637, and it will flow plenty
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post #6 of 20 Old 12-29-2011, 09:40 AM
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Filters don't cause surge. Surge happens at the turbo, not the filter.

2005 F250 CCSB FX4 6.0
2003 Excursion 6.0 4WD
1997 F350 CCLB 4WD 7.3
1996 F250 SCLB 4WD 7.3
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post #7 of 20 Old 12-29-2011, 12:17 PM
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yeah the filter didn't cause the surge, they prolly just never heard it before they put their open element filter on
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post #8 of 20 Old 12-29-2011, 12:22 PM Thread Starter
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My point here is does the amount of air from the 6637 cause surge

1999 F-250
TS 4 Pos Chip(50-75-100-140)
AFE air intake with K&N filter
5" Exhaust
3 Pillar pod (Pyro, EGT, Boost)
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post #9 of 20 Old 12-29-2011, 12:34 PM
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no, but it's gonna surge since you are runnin a chip
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post #10 of 20 Old 12-29-2011, 01:05 PM
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Quote:
Originally Posted by Sgt. Stroker View Post
My point here is does the amount of air from the 6637 cause surge
Nope. I've had a truck surge with a stock airbox and a Motorcraft air filter.

2005 F250 CCSB FX4 6.0
2003 Excursion 6.0 4WD
1997 F350 CCLB 4WD 7.3
1996 F250 SCLB 4WD 7.3
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