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02-19-2020, 07:24 PM | #1 |
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305 header size ???
What would be the best header size to run. The combo is 175/248. Thanks.
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02-20-2020, 11:20 AM | #2 |
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Re: 305 header size ???
Found power on the dyno going down from 1 &3/4 to 1 & 5/8
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F Federico NHRA J/SA |
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02-20-2020, 11:27 AM | #3 |
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Re: 305 header size ???
The late great Jere Stahl strongly recommended 1 5|8 on my 305 ; it made real good horsepower .
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02-20-2020, 02:45 PM | #4 | |
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Re: 305 header size ???
Quote:
lol
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Mark Callanan 1027 STK |
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02-20-2020, 06:13 PM | #5 |
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Re: 305 header size ???
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02-20-2020, 06:17 PM | #6 |
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Re: 305 header size ???
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02-20-2020, 06:33 PM | #7 |
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Re: 305 header size ???
I would probably do a 1 1/2 to 1 5/8 step.
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Billy Nees 1188 STK, SS World's greatest Under-Achiever! |
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02-20-2020, 06:58 PM | #8 |
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Re: 305 header size ???
My dish piston 305 2bbl made the most with 11/2"-15/8"step with a merge collector
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02-20-2020, 07:28 PM | #9 |
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Re: 305 header size ???
Based on past experience, assuming it is an auto trans, I'm thinking that 1 1/2 / 1 5/8 is going to work best with a 2 1/4 to 2 2/4 merged collector.
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02-21-2020, 01:55 AM | #10 |
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Re: 305 header size ???
Brian Fink, I thought you had Jack Davis small tube step headers on your car, per 2007 Hemmings Muscle Machines.
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Tom Moock 5704 STK |
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