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I just got off the phone with the people at Kenne Bell, and I was told something that actually shocked me. I was told that the 2.8 L KB 725 HP supercharger will work best with the stock exhaust. I asked them if they had done dyno testing with header applications, and I was dissuaded from doing so.

This was truly baffling to me because the Super Snake package includes a Borla (not stock) exhaust...

I had been envisioning a KB and Bassani full exhaust, with stepped headers and catted X-Pipe, based upon dyno data I had ran accross on the internet. Essentially, I was told by the people at Kenne Bell that the data was false. That you couldn't get enough air flow with the headers.

Here is a link to the articles that inspired this thought process (these are based upon a Ford GT engine block and Cobra R manifold):

http://www.musclemustangfastfords.com/tech/mmfp_0906_ford_aluminum_5_4l_header_swap/index.html

http://www.musclemustangfastfords.com/tech/mmfp_0907_ford_aluminum_5_4l_header_swap_part_2/cobra_r_


Anyone have any thoughts on this? Experience to confirm or to the contrary?
 

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I just got off the phone with the people at Kenne Bell, and I was told something that actually shocked me. I was told that the 2.8 L KB 725 HP supercharger will work best with the stock exhaust. I asked them if they had done dyno testing with header applications, and I was dissuaded from doing so.

This was truly baffling to me because the Super Snake package includes a Borla (not stock) exhaust...

I had been envisioning a KB and Bassani full exhaust, with stepped headers and catted X-Pipe, based upon dyno data I had ran accross on the internet. Essentially, I was told by the people at Kenne Bell that the data was false. That you couldn't get enough air flow with the headers.

Here is a link to the articles that inspired this thought process (these are based upon a Ford GT engine block and Cobra R manifold):

http://www.musclemustangfastfords.com/tech/mmfp_0906_ford_aluminum_5_4l_header_swap/index.html

http://www.musclemustangfastfords.com/tech/mmfp_0907_ford_aluminum_5_4l_header_swap_part_2/cobra_r_


Anyone have any thoughts on this? Experience to confirm or to the contrary?
That doesn't make good sense. I used kooks headers with a 3 inch catted x pipe and went from 640 to 650 hp but the new sound of the exhaust was worth it to me. I believe the borla exhaust on the SS was still a manifold header.
 

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I guess it depends on what you belive.I beleive that a engine is nothing more than a air pump.,that being said,the more air you can flow through the engine nice air intake,headers, free flowing exhaust the more your engine will run effecient and make more power.with headers you may not make as much boost but will flow more air thus making more power.That is what I beleive. I will have my 2.8H tomorrow and hopefully the American Racing Headers will come in as well.I may just put the blower on and do some dyno pulls then put the headers on,maybe,maybe not.I am really looking forward on the sound the headers will give me.I have my own 248 Dynojet and everything I do to my car I try to see what it does.My car is a 07 ,I just put a Innovators West stock size balancer on Tuesday night and made 557,the balancer gave me 14 HP.Weather does suck now,But seat of the pants feel is great
 

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True story. It's been proven multiple times. Different X or an H and a set of higher flow mufflers.....all you'd need. Any power pickup with headers on a blower-only mod has been marginal for a number of folks. Try "search", it's been discussed a ton.

bj
 
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