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11-26-2018, 03:07 PM | #11 |
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Re: Lets talk headers
most don't test today, they rely on what their competitors with a similar combo run, what they've read on an internet forum, evident by this thread and/or what companies like Burns tell them they need and even then experts aren't always right.
I remember a lengthly conversation I had one night with Jere Stahl who refused to believe I ran as quick as I did with 1 3/4" primary tubes on my 700HP 468. The fact remains that most run headers that are not one but two pipe sizes too big. Last edited by 1320racer; 11-26-2018 at 09:16 PM. |
11-27-2018, 10:45 AM | #12 |
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Re: Lets talk headers
Might do some testing and find that in bad air a small two step tube with no merge would be the ticket. Don't fall for the bling of a merge unless you like to pay for bling. Better test & test some more... You could be leaving a lot on the table, esp when you bring preconceived ideas of what is best. Last July I was dyno testing a Drag Pack engine at BES and put my smaller 2 step non merge headers on and with their best merge/big tube tune it had a 25 HP average better between peak Tq and Peak HP and was only down 1 HP at peak. They also had 17 higher Tq. and a longer run at peak Tq number. Point is... Test and let the engine tell you what it wants..
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Adger Smith (Former SS) |
11-27-2018, 12:36 PM | #13 | |
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Re: Lets talk headers
Quote:
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11-28-2018, 04:14 PM | #14 | |
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Re: Lets talk headers
Quote:
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Ed Wright 4156 SS/JA Last edited by Ed Wright; 11-28-2018 at 04:25 PM. |
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11-30-2018, 09:52 AM | #15 |
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Re: Lets talk headers
I would agree that a lot of guys are probably running headers too big. FWIW I run 1.875 ( no steps ) with the std. 3.5 collectors on mine.......and at 3000lbs I've been a 9.32@ 144 with my 377. That probably puts me around 700ish with a 1.875 pipe. I would start with 1.750 on a low HP combo for sure.
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12-01-2018, 09:57 AM | #16 |
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Re: Lets talk headers
Joe, please check you PM, ref 377
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Larry Woodfin 471W |
12-01-2018, 05:47 PM | #17 |
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Re: Lets talk headers
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12-01-2018, 06:54 PM | #18 |
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Re: Lets talk headers
joespanova
my bad, I thought your name is Joe. I apologize. AnyWho, I want to know about your 377 - 700 horse buildup
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Larry Woodfin 471W |
12-01-2018, 07:37 PM | #19 |
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12-01-2018, 07:46 PM | #20 |
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Re: Lets talk headers
please check again
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