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Old 08-23-2009, 05:46 PM   #1
KQQL IT
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BBC in a 73
Ive seen a few threads with different header combos ie car headers with 2inch or bigger tubes in a 73? Can you help with pics and part numbers?? Thanks in advance.
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Old 08-23-2009, 09:25 PM   #2
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Re: BBC in a 73
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Originally Posted by KQQL IT View Post
Ive seen a few threads with different header combos ie car headers with 2inch or bigger tubes in a 73? Can you help with pics and part numbers?? Thanks in advance.
I believe the headers im running are for a 454 they are 3" collectors. They hang a little low but it works. Sorry i dont know the brand.
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Old 08-23-2009, 09:43 PM   #3
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Re: BBC in a 73
Sanderson BB8's...I have them in my 468 '73...fit like a GLOVE!
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Old 08-23-2009, 11:05 PM   #4
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Re: BBC in a 73
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Sanderson BB8's...I have them in my 468 '73...fit like a GLOVE!
What tube size are the bb8s? Alsoi should have said long tube 2" or bigger Thanx again
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Old 08-28-2009, 11:45 PM   #5
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Re: BBC in a 73
Ttt
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Old 08-29-2009, 04:26 PM   #6
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Re: BBC in a 73
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What tube size are the bb8s? Alsoi should have said long tube 2" or bigger Thanx again
I'm curious why you need 2" or bigger. What are the specs on your engine? Must be a behemoth. Lot's of cubes and a blower maybe?
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Old 08-29-2009, 04:39 PM   #7
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Re: BBC in a 73
2" match the ports on the heads And future plans for 498" 13:1 fire breather...
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Old 08-30-2009, 06:12 PM   #8
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Re: BBC in a 73
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2" match the ports on the heads And future plans for 498" 13:1 fire breather...
Port size and tube size are two different things. I agree it is a good thing that the header flange matches the port on the head, but that does not mean the primary tube has to have the same cross-section area. Unless you are running larger than 1.88" exhaust valves and lots of lift, a 1-7/8" primary is the max you should need. Any larger will probably hurt flow velocity.
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Old 08-31-2009, 06:21 AM   #9
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Re: BBC in a 73
hooker #2455 also avaiable in stainless
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Old 08-31-2009, 05:37 PM   #10
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Re: BBC in a 73
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Originally Posted by 454HO View Post
Port size and tube size are two different things. I agree it is a good thing that the header flange matches the port on the head, but that does not mean the primary tube has to have the same cross-section area. Unless you are running larger than 1.88" exhaust valves and lots of lift, a 1-7/8" primary is the max you should need. Any larger will probably hurt flow velocity.
yeah... what he said!

a well tuned exhaust is just as benificial as a well tuned carb!

if you are wanting the absulute most out of your combination, do a search for pipemax header design... it will be an educational journey
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Old 09-05-2009, 12:33 PM   #11
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Re: BBC in a 73
Maybe.. but the 454 for the 73 is in a nova that runs 11.40s with 2" tubes
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