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1994.5 - 1997 7.3L Power Stroke Diesel  

6637 In!

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Old Aug 11, 2008 | 02:30 PM
  #1  
secondarychaos's Avatar
secondarychaos
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From: Grass Valley, CA
6637 In!

and incredible!
took me all of 15 minutes and 35 bucks for an incredible difference.
I was seeing this:
1st and second gear: max boost 12 psi, EGT's at 1000 max
3rd and OD: Max boost 14-15 psi, EGT's could barely touch 1200.
NOW,
first of all, the turbo responds 300-400 rpms faster,
1st and 2nd gear: Max boost 15 psi, EGT's wont make it to 950
3rd and 4th: Max boost 19 psi (can almost touch 20, but not quite) EGT's max out at 1150 or so and it takes a while to pass 1100.
I am extremely happy with this small investment!
 
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Old Aug 11, 2008 | 03:11 PM
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Hussler
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Yep, best bang for the buck I've found yet. Keep an eye on the connection at the 6637. Mine came loose and I had to re-do. Other than that enjoy ...
 
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Old Aug 11, 2008 | 03:12 PM
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CampSpringsJohn
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Great! I don't have any gauges on my trucks, but the 6637 mod was the first mod I did. It's neat the different sounds the turbo makes, not to mention the boost in performance.
 
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Old Aug 11, 2008 | 03:17 PM
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scatgo
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From: Long Island, NY
Ya got a real down pipe yet? I got my down pipe after I did my intake and thats when I could really hear my turbo whistle. Its a little more money and more work but the two together really make the difference. And you might want to get rid of the catalytic converter.
 
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Old Aug 11, 2008 | 03:38 PM
  #5  
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secondarychaos
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Next move is a turbo back exhaust minus the cat. it found new love in the spoon in my shop lol... cant keep them apart any longer
Give it a few weeks and i'll have the whole thing in...
Oh, and the added whistle was amazing. that thing sings above 10 psi!
 
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Old Aug 12, 2008 | 09:35 AM
  #6  
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From: Goodyear, AZ
did you just use a 45deg PVC elbow to connect the filter?
 
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Old Aug 12, 2008 | 10:44 AM
  #7  
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I used ABS just because it was what i had laying around. so it went- filter, 45* elbow, 8" section of 4" abs and that goes into the turbo inlet (actually the CCV section...) and i used a large screw clamp on the piece of 4".
 
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