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05-17-2004, 06:08 PM
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#1 |
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Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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Vac. Secondaries Question
I have a set of springs for my holley was wondering how to change them?
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO Last edited by 76bonanza; 05-17-2004 at 06:35 PM. |
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05-17-2004, 10:18 PM
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#2 |
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Registered User
Join Date: Nov 2002
Posts: 272
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Take the cover off the vac sec diaphram by removing the four screws. Circled in yellow
then lift up on cover There you have it |
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05-17-2004, 11:22 PM
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#3 |
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Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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My cover only has three screws and I have removed them but the cover will not budge.
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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05-18-2004, 10:21 AM
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#4 | |
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Registered User
Join Date: Feb 2004
Location: Atlantic Highlands, N.J.
Posts: 139
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Quote:
Stock Holley spring is probably silver, very stiff so secondary most likely not working, go to the yellow spring for the quickest secondary opening response if that is what you are looking to do.
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86 GMC SWB, DK. BLUE, ZZ430,TH400, 4.11'S, HEADMAN CERAMIC HEADERS, WELD BILLETS, BFG 275 / 60 / 15, 325 / 50 / 15 DRAG RADIALS, FIBERGLASS COWL HOOD, B&M SHIFTER. MSD, MARCH PULLEYS / ALT. / PWR. STEER PUMP, BECOOL RAD., BILLET GRILL & GRANT WHEEL. |
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