6637 question
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Senior User
Joined: Jan 2006
Posts: 100
Likes: 0
From: Northern Nevada
6637 question
Today I received my 6637 kit from Riff Raff (awesome,quick shipping!). One thing I forgot to ask when I bought the kit is this, will my exhaust temps increase if I have not increased the size of my exhaust? I cannot afford to modify my exhaust at this time and was just wondering. Thanks in advance. I bought this kit because the stock airbox was allowing dirt into the turbo sleeve.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Or if you want, you can put a straight pipe in place of the muffler. Not sure if NV looks for mufflers or not on Diesels, but if not, it's a decent way to get a lot more flow in the exhaust for a few bucks.
Cargo Master
Joined: Oct 2008
Posts: 3,330
Likes: 13
From: Eaton, CO
IF you pull grade, read this:
https://www.ford-trucks.com/forums/8...ade-empty.html
I'm not the only one who has experienced issues with pulling grade after the 6637 install. I still haven't installed a wicked wheel. I'll probably do that when I install bellowed up pipes.
https://www.ford-trucks.com/forums/8...ade-empty.html
I'm not the only one who has experienced issues with pulling grade after the 6637 install. I still haven't installed a wicked wheel. I'll probably do that when I install bellowed up pipes.
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Senior User
Joined: Jan 2006
Posts: 100
Likes: 0
From: Northern Nevada
Now I am a little concerned because this is the first I have heard of this. I do pull a 8k trailer over the passes in Nevada very often. I have not done any mods to the truck besides buying the 6637 and the reason I went to this mod was simply to keep dirt out of the turbo the stock box was not doing.
Cargo Master
Joined: Oct 2008
Posts: 3,330
Likes: 13
From: Eaton, CO
Before the mod, I could accelerate up a 7% grade in 6th gear. After the mod, it loses speed and turbo surge is very evident, requiring a downshift.
I couldn't find any mention of this before I performed the install. I wish I had purchased and installed a wicked wheel & turbo pedestal o-rings along with the 6637 so I wouldn't have had to deal with my enraged wife sitting next to me when our work truck wouldn't pull a 7% grade.
I'm pretty sure the turbo surge will clear up after said mods are installed. Right now we're throwing maintenance money into the truck and the mod list won't quit growing.
I couldn't find any mention of this before I performed the install. I wish I had purchased and installed a wicked wheel & turbo pedestal o-rings along with the 6637 so I wouldn't have had to deal with my enraged wife sitting next to me when our work truck wouldn't pull a 7% grade.
I'm pretty sure the turbo surge will clear up after said mods are installed. Right now we're throwing maintenance money into the truck and the mod list won't quit growing.
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
I get the same thing with my set-up. I don't have the 6637 but a cold air intake. I don't really pull heavy loads. I can even hear the surge with no load going fast up a steep hill. Performance does not seem to be an issue for me but not a heavy load. If I downshift it disappears for the most part. I need to look into the WW as well I guess. I have not tried it in stock tune yet, maybe I would not get it then. I did not really know it was turbo surge until recently.
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Senior User
Joined: Jan 2006
Posts: 100
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From: Northern Nevada
My 2002 is an auto, will this be a problem since I cant really downshift. I am planning on this mod,once done I will road test it and see what happens. I wish I would have known about this before I bought this mod. Again, I only did this because I was getting small amounts of dirt in the turbo boot.
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