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Author
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Topic: Superstock Holley
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JCQuinn@work
Gearhead Posts: 998
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 11-29-2006 01:45 PM
 
After many false starts and delays caused by a variety of bad things, I am finally starting to put together a couple of engines for Superstock use. Both of the engines are small blocks (Ford of course) with Holley carburetors.My question is - how many parts can I change on the carb and still pass tech? Can I use the billet metering blocks? I am sure I have to retain the original main body but many of the parts attached to it have modified replacements like the 50cc pump. Looking at the throttle body, the screws that attach the blades to the shaft protrude out of the other side, can these be shortened? John
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Moneymaker
Administrator Posts: 29200
From: Lyons, IL, USA
Registered: May 99
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posted 11-29-2006 09:30 PM
You must maintain the original identity of the carb John.
IE:
4150 or 4160 and booster configuration.You can replace tuning parts such as pumps, cams, discharge nozzles, and metering blocks but no billet parts or adjustable air bleeds.
Main body, throttle body and blades cannot be modified or touched other than a 1/8 hole drilled in the blades.
Screws cannot be shortened.
(remember what happened to Bucky Hess recently?)
Choke linkage or housing can be removed, but plate must remain in place.
Bowls can also be replaced and single feeds can become dual feeds.
All the really measure now is the venturi and throttle blade sizes. ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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TurboGT
Gearhead Posts: 318
From: Hutchinson, Kansas
Registered: Mar 2002
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posted 11-30-2006 08:40 AM
Alex - Are they allowing side pivot float bowls to be replaced with center pivot float bowls?------------------
Mark Walton '83 Mustang GT 2.3 Turbo NHRA SS/N-O-P
SS/P National Record Holder [email protected]
'69 "off brand" NHRA SS/EA
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Moneymaker
Administrator Posts: 29200
From: Lyons, IL, USA
Registered: May 99
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posted 11-30-2006 12:07 PM
Yes Mark, I assume so, as best as I can tell based on eye witness accounts of cars that should have had OEM side pivots and have cathedral center pivot floats on them.
I was told that all they are really checking are the venturi, throttle blades and body.
(along with the obvious choke and air horn)------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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JCQuinn@work
Gearhead Posts: 998
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 11-30-2006 12:47 PM
Thanks Alex, I remember reading about the Bucky Hess problem but I couldn't remember the details. I sent an email to my division tech director about a month ago asking if I could put the cathedral bowls on in place of the originals. So far he has ignored me.So I will put on the bigger pumps and play with the secondary springs, shooters and the like and resist cutting those gigantic screw protrusions that are messing up my air flow. Any advise on where to start with shooter size, main jets and the power valve. It has been a long time since I messed with this stuff. The first engine is an 85 302 the second will be a 65 Shelby Mustang 289. Both are vacuum secondary. John Oh, one more question, do you run cast cranks in your 289?
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Moneymaker
Administrator Posts: 29200
From: Lyons, IL, USA
Registered: May 99
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posted 11-30-2006 09:14 PM
NO POWER VALVES!
Primary about 66 on both with a 37-40 nozzle.
Choose a pump cam that will give you shot through the entire travel of the primary linkage.
Medium secondary spring with no check ball.
72-76 on the secondary side.
I use nothing but 1X 289 cast cranks in all our SS engines.
------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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JCQuinn@work
Gearhead Posts: 998
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 11-30-2006 09:51 PM
Thanks Alex, I like the "NO POWER VALVES" advice, simpler is better.John
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Stephen & Horace Johnson
Gearhead Posts: 275
From: Gadsden, AL
Registered: Jul 2002
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posted 12-02-2006 12:36 AM
I would take caution about using float bowls that didnt come on the combo!!!!! Ask me how I know. It depends on what tech man you are dealing with........------------------
"Stand It Up" Stephen Johnson #2162
"Happy" Horace Johnson #2167
NHRA-IHRA SS/D 427 Ford Fairlane (Ex-Van Cleve)
National Record Holder
1985 Mustang GT
10.56 at 129mph 331
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