LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Can someone explain the leaky primary thing about long tubes to me

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Old Feb 14, 2004 | 12:05 AM
  #1  
fozziez28's Avatar
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Can someone explain the leaky primary thing about long tubes to me

I have been doing a little bit of research on long tubes. All i hear about jet-hots is the leaky slip fit primary. What is that? Pics would help. I hear great things about hookers, but they are incredibly expensive! I have heard they have a leaky primary as well. Can somebody break down the pros and cons of each long tube. I have also heard the pacesetters do not have this leaky primary problem. Thanks, Michael
Old Feb 14, 2004 | 12:12 AM
  #2  
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Ill try to explain it the bast i can. The Hooker LTs and the Jet Hot LTs are basically the same header. And on both the #1 primary(small tubes that come off the head) is in 2 pieces to make it easier to install i guess. And around that joint where they come together they tend to leak some around there. That could be an easy fix, but on most cars ive been in with Hooker or Jet Hot headers that spot isnt that big of a problem.
Old Feb 14, 2004 | 12:16 AM
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A search will uncover plenty of information of the pros and cons between headers.

From my understanding the Hooker and Jet Hot headers are almost identical. They both use a slip fit on one of the primaries. It's a harsh position for a slip joint to seal effectively. Some people have had problems, in which case it'll make noise and also cause a false lean condition as it "sucks" air into the exhaust.

One of the best methods to avoid this problem is to use a band clamp from Supertrapp around the fitting. I've posted the part number before, maybe you can find it with a search?
Old Feb 14, 2004 | 12:36 AM
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fozziez28's Avatar
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i basically know the pros/cons out there as i did do a more extensive search. Are there any pictures of this joint/slip fit anywhere? Thanks, Michael
Old Feb 14, 2004 | 12:52 AM
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http://www.bfranker.badz28.com/fbody/exh-0629_IMG.JPG

There's a good picture of the headers. The header on the bottom of the picture is the driver's side. You'll notice that the #1 cylinder's primary is laying between the two headers. When you install these, that tube slips into the the header set (if you follow the tubes from the collector on up you'll see where it inserts) That joint is where the problem sometimes pops its head up.
Old Feb 14, 2004 | 01:05 PM
  #6  
fozziez28's Avatar
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gotcha, clear as day now. So, would u recommend the jethots or the new pacesetter, because i heard the jethots are hitting floorboards and kmembers on a lot of 95's. Thanks, Michael
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