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Author
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Topic: Headers/aka primary size?
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jsracingbbf
Gearhead Posts: 1677
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 04-29-2002 12:59 AM
   
I'd like to know what some other guys running BBF's are using for primary tube size. I called Judy Stahl of Stahl headers for a weld up kit and she told me the ( ruined in wreck ) last headers I was running were too small for 514 cubic inches. I was running 2 1/8th primaries into 4 in. collectors. She says use at least 2 1/4 primaries with 4 to 4 1/2 collectors. Any opinions?
Thanks! 
Jerry
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Butch Jennings
Gearhead Posts: 582
From: No. California
Registered: Apr 2000
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posted 04-29-2002 01:18 AM
I have to agree, I run a 2 1/8" primary into a 4" collector with 4" exhaust system (Flowmasters). My heads have a SCJ exhaust port.
Forget to add that my engine is 466 cubic inches.
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Butch
460 powered 1967 Comet Cyclone
10.271 @ 130.069
Butcher's Home Page
"Friends don't let friends drive Chevys" [This message has been edited by Butch Jennings (edited 04-29-2002).]
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TomP
Gearhead Posts: 4812
From: Delta BC Canada
Registered: Dec 99
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posted 04-29-2002 02:36 AM
I wouldn't go any bigger than 2 1/4" unless you run it past 7,500.
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jkilroy
Gearhead Posts: 1719
From: Vicksburg, MS
Registered: Dec 99
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posted 04-29-2002 10:09 AM
Jerry, Could you email me with the contact information for Stahl headers? I am pretty sure that nobody makes a set of 2 1/4 tubes to put a BBF into a 68 fastback. I will probably have to do the work myself. What exactly is in their 'weld up kit'? Is the flanges and a bunch of bends?
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jsracingbbf
Gearhead Posts: 1677
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 04-30-2002 02:07 AM
yes sir it is the flanges and a set of more than enuff bends to do whatever you need. I'll get the phone number and send it.
Jerry
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SteveLaRiviere
Administrator Posts: 33371
From: Saco, Maine
Registered: May 99
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posted 04-30-2002 07:41 AM
quote:
Originally posted by jkilroy:
Could you email me with the contact information for Stahl headers?
http://www.stahlheaders.com/
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'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
MCA Member # 47773 The secret of success is sincerity. Once you can fake that, you got it made.
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Moneymaker
Administrator Posts: 19704
From: Lyons, IL, USA
Registered: May 99
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posted 04-30-2002 09:36 AM
It all depends on the intake and exhaust port flow, and the maximum RPM. 2 1/4 would be the MAXIMUM I think. ------------------
Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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jsracingbbf
Gearhead Posts: 1677
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 04-30-2002 11:56 PM
Thanks Everyone
Jerry
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