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Carb

March 25th, 2010 No comments

My friend sold me this sweet carb. It’s a Holley 4150 that’s been rebuilt by The Carb Shop to their stage III race carb specs.  I did some rebuild work on it – replaced gaskets, cleaned all the old varnish out, replaced the power valve and accelerator pump diaphragms, replaced the fuel sight windows.  I also tapped and helicoiled the air filter mount and set the accelerator pump clearances.

I cleaned out all the old gas varnish with q-tips and carb cleaner.
I cleaned out all the old gas varnish with q-tips and carb cleaner.
With the throttle valves removed, this is the bottom of the carb
With the throttle valves removed, this is the bottom of the carb
This is a really nice carb that my friend gave me a great deal on. It's a Holley 4150, but it's been rebuild by The Carburetor Shop to their Stage III race carb specs.
This is a really nice carb that my friend gave me a great deal on. It's a Holley 4150, but it's been rebuild by The Carburetor Shop to their Stage III race carb specs.
carefully cleaned off the old gasket material from the metering blocks
carefully cleaned off the old gasket material from the metering blocks
These old accelerator pump diaphragms have seen better days. replaced!
These old accelerator pump diaphragms have seen better days. replaced!
Shiny new accelerator pump diaphragm
Shiny new accelerator pump diaphragm
After installing the new accelerator pump diaphragm, I set the travel of the pump actuator. Set the carb to Wide Open Throttle, push the pump arm to full on, and set the screw so that there is .015 clearance. This prevents you from tearing the diaphragm at WOT.
After installing the new accelerator pump diaphragm, I set the travel of the pump actuator. Set the carb to Wide Open Throttle, push the pump arm to full on, and set the screw so that there is .015 clearance. This prevents you from tearing the diaphragm at WOT.
The air filter mount bracket was stripped out. This 1/4x20 Helicoil took care of that no problem.
The air filter mount bracket was stripped out. This 1/4x20 Helicoil took care of that no problem.
Carb put together. You can see I removed an unused vaccuum port and put in a 1/8 NPT set screw in its place as a plug.
Carb put together. You can see I removed an unused vaccuum port and put in a 1/8 NPT set screw in its place as a plug.
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