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  #25  
Old 08-15-2011, 08:51 PM
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Re: 4.7 Headers?

Quote:
Originally Posted by Crestwood1001 View Post
see my memory is still pretty good! I think anytime anyone tries to make a thread about headers for the 4.7 it should just delete the thread and tell them to PM Scott lol.

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This is truth.

IF you want headers, It'll require them to be custom one-off headers and look to spend over a grand and not to be able to drive your WK for a couple weeks at minimum.

Which is why most of us still have stock headers.
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  #26  
Old 08-15-2011, 10:25 PM
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Re: 4.7 Headers?

And if you had that kind of money to throw around on headers, why not just get a 5.7 or SRT8. Case closed. Move on.
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  #27  
Old 08-15-2011, 11:38 PM
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Re: 4.7 Headers?

The bulk of the gains are not in the manifolds like everybody assumes but in the downpipes...snake some 2.25" with a equal merge into a 3" single and watch it run.
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  #28  
Old 08-15-2011, 11:42 PM
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Re: 4.7 Headers?

Quote:
Originally Posted by Scottina06 View Post
what do you charge to do this?
Havent figured that out yet but there may be a set coming my way, i have to see what all can be done with them but regardless itll be way less than trying to make headers fit or fabbing a custom set. Downpipe modifications are a must to maximize gains, at least on the WJs.
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  #29  
Old 08-15-2011, 11:43 PM
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Re: 4.7 Headers?

When I had my muffler added they stock pipe was distroyed cause they did a terrible job welding in a 2 inch universal muffler so I had them pull everything and do it in 3 inch. WELL worth it, i noticed a 2mpg gain and she was so much more responsive
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  #30  
Old 08-18-2011, 08:37 PM
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I may have to look into a set of custom headers.

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  #31  
Old 08-19-2011, 09:51 PM
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Re: 4.7 Headers?

Quote:
Originally Posted by scjeep4.7HO View Post
I may have to look into a set of custom headers.

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Richie have you considered 08+ manifolds? Exh manis that is. Ive seen them up close and IIRC they are pretty decent. Lots of material to port them too if there is some mismatch. The only thing I am not 100% sure about is the bolt pattern...but I think they are the same.

Your truck will always shine up top...may as well live with shorter primaries.
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  #32  
Old 08-20-2011, 01:15 PM
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I don't think any factory manifold its going to sustain the 20 pounds of boost I can see. I'm loosing power efficiency somewhere and that's the only thing left stock.

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  #33  
Old 08-20-2011, 01:41 PM
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Re: 4.7 Headers?

Id look into the ones that Scott was trying to get, if they just were actually lost in the mail it wouldnt hurt to try, even if they need light modification to get them to work on a left hand drive.
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  #34  
Old 08-20-2011, 02:20 PM
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I talked to them before anyone else did. They are for right hand drive. I would have to have them modified so I might as well just have them made right from the get go.

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  #35  
Old 08-20-2011, 09:02 PM
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Re: 4.7 Headers?

Quote:
Originally Posted by scjeep4.7HO View Post
I don't think any factory manifold its going to sustain the 20 pounds of boost I can see. I'm loosing power efficiency somewhere and that's the only thing left stock.

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I would have to imagine you are meeting or exceeding the flow limitations of the stock manifolds...causing excess heat. At the point your at ANYTHING would be better than nothing.
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