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Joined: Apr 2004
Posts: 49
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Apr 2004
Posts: 49 |
My 59 has a 283 with 4 jet Rochester and it has a flat spot when taking off, worse when cold.
I bought a "Jet" kit but the pump plunger was too big [3/4"] mine is around 1/2"
The book says the Power Valve is probably crook.
Which one is the Power valve??
1935 Mst Roadster,1939 Norton Big 4 outfit, 1942 Buick, 1943 GPW,1959 Bel Air 2 Dr, 1963 Corvair Convert. 1956 FJ Holden Ute
Hooroo from OZ
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Willwood Engineering
Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188
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Joined: May 2006
Posts: 92
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: May 2006
Posts: 92 |
I'm presuming your '59 has a 4GC and not a Q-jet, and that might also be why your pump plunger doesn't fit. 4GC was the standard GM 4-barrel in the late '50's to early '60's and Quadra-Jet came later. This page has a good diagram to show what the power valve is and where it's located. http://chevy.tocmp.com/Rochester/9D9p07.htm
http://home.comcast.net/~ps_kennedy/wsb/media/342430/site1043.JPG
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Joined: Apr 2004
Posts: 49
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Apr 2004
Posts: 49 |
1935 Mst Roadster,1939 Norton Big 4 outfit, 1942 Buick, 1943 GPW,1959 Bel Air 2 Dr, 1963 Corvair Convert. 1956 FJ Holden Ute
Hooroo from OZ
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Joined: Apr 2004
Posts: 49
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Apr 2004
Posts: 49 |
The problem appears solved, I raised the float level and I've since bought the correct kit to install,and she's running well
1935 Mst Roadster,1939 Norton Big 4 outfit, 1942 Buick, 1943 GPW,1959 Bel Air 2 Dr, 1963 Corvair Convert. 1956 FJ Holden Ute
Hooroo from OZ
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Joined: May 2006
Posts: 92
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: May 2006
Posts: 92 |
Great news - isn't it amazing what correct adjustments can do to improve performance?
http://home.comcast.net/~ps_kennedy/wsb/media/342430/site1043.JPG
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