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Are my headers hurting my numbers?

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Old 12-13-2006, 07:38 PM
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Default Are my headers hurting my numbers?

I have Stainless Works LT's. They have 2.5 inch collectors on them into a 2.5 inch catted Y in to the SLP d/d. Is this hurting my hp numbers? 411hp on a mustang dyno with a 9" and 3.89 gears. The power band dropped off after 6300 rpms as well. Does it sound like I dont have a 234/240 cam in it?
347 motor w/ Edelbrock TSP terminator heads
Old 12-14-2006, 01:04 AM
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Stainless Works headers are defininetly not your weakest link.

Your weakest link is having a LS6 intake instead if a Fast. Also, dropping the CATS and adding true duals would add quite a bit.
Old 12-14-2006, 01:29 AM
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411 on a mustang through a 9 inch is excellent. I don't think the headers are holding you back.
Old 12-14-2006, 01:31 AM
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Originally Posted by Louie83
Stainless Works headers are defininetly not your weakest link.

Your weakest link is having a LS6 intake instead if a Fast. Also, dropping the CATS and adding true duals would add quite a bit.
Old 12-14-2006, 09:06 AM
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I put the same numbers up with a tr224 and PRC 5.3 ltre heads.
Old 12-14-2006, 09:40 AM
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Originally Posted by Grimes
411 on a mustang through a 9 inch is excellent. I don't think the headers are holding you back.
Thats what I thought for an A4.He posted this in another thread where his TR224 cam made the same numbers,but it was through the 10bolt.I think that the 9 inch/gears that he swapt are gonna eat some numbers,nonethe less I think good numbers through an a4 9inch and a MUSTANG dyno
Old 12-14-2006, 09:50 AM
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I'm seriously questioning the cam. I'll post the graph in the dyno section as soon as I get it today.
Old 12-14-2006, 10:17 AM
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the 9" swallows up more HP than your 10 bolt did.. and i wouldnt say the LS6 is a hold back at all.. considering studies and tests have shown them to flow about the same until the 6000rpm mark..




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