6637 installed today
New User
Joined: Feb 2007
Posts: 14
Likes: 0
Just an update. I've done my 6637 mod and used 4" exhaust pipe from a Kenworth dealer. They didn't have any stainless steel scrap, so I painted it flat black. It definitely gives my F350 more pep.
I was just curious if anyone has any ballpark figures on the increase on horsepwer and torque with the 6637 mod? My truck is stock, for now, and am thinking about the Zoodad mod.
I was just curious if anyone has any ballpark figures on the increase on horsepwer and torque with the 6637 mod? My truck is stock, for now, and am thinking about the Zoodad mod.
Tuned
Joined: Feb 2007
Posts: 490
Likes: 3
I did mine yesterday, too. I noticed how oily it was inside the pipe and will probably do the CCV mod next.
I disconnected the hose and brought it inside the house to warm up. It stretched over the filter a lot easier after that. The stock worm drive clamp worked after I cut off one of the small centering tab.
I disconnected the hose and brought it inside the house to warm up. It stretched over the filter a lot easier after that. The stock worm drive clamp worked after I cut off one of the small centering tab.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
I did mine last week, too. The stock intake tube took some coaxing to get on, but it went. My stock clamp also worked after I trimmed the tab a little. However, go back and double-check your clamp! Mine was loose a couple days later, so I tightened it a bit more than I did the last time. I was a bit gun-shy of over-tightening, so I didn't cinch down as hard as I would've normally. I'll keep an eye one it.
*DO THE CCV MOD* -- After I saw the oily boots & oil on the back of the engine, I did it as soon as I had time. I used a short piece of 4" thin PVC to replace the vented coupler, which was about as difficult to get into the turbo-side tube as the fliter on the other side. A medium-sized screwdriver as a shoehorn helped quite a bit.
Joe
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2002 7.3L F250 XLT CrewCab ShortBed 2WD
*DO THE CCV MOD* -- After I saw the oily boots & oil on the back of the engine, I did it as soon as I had time. I used a short piece of 4" thin PVC to replace the vented coupler, which was about as difficult to get into the turbo-side tube as the fliter on the other side. A medium-sized screwdriver as a shoehorn helped quite a bit.
Joe
------------------------------------------
2002 7.3L F250 XLT CrewCab ShortBed 2WD
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
Hey, Izzy... did you roughen up the surface of the 6637 filter extruded end before clamping down on it? I've read where several guys have seen that help them out. I, too, had mine come loose within a week of installing, and I jsut went ahead and used a piece of 4" exhaust pipe for the transition.
Now, though, I've smelled exhaust in the cab a couple of times when using the "vent". I need to check all my boots to make sure they're still tight.
Now, though, I've smelled exhaust in the cab a couple of times when using the "vent". I need to check all my boots to make sure they're still tight.
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Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Originally Posted by F250-Newbie
Hey, Izzy... did you roughen up the surface of the 6637 filter extruded end before clamping down on it? I've read where several guys have seen that help them out. I, too, had mine come loose within a week of installing, and I jsut went ahead and used a piece of 4" exhaust pipe for the transition.
Now, though, I've smelled exhaust in the cab a couple of times when using the "vent". I need to check all my boots to make sure they're still tight.
Now, though, I've smelled exhaust in the cab a couple of times when using the "vent". I need to check all my boots to make sure they're still tight.
Joe
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2002 7.3L F250 XLT CrewCab ShortBed 2WD
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
I got gunshy after mine came loose, and decided to not worry about it any more and use the scrap piece of pipe I picked up at a local exhaust shop. Now I don't feel paranoid about it, and have just enough of that scrap 4" left over to do my CCV before too long.
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