How to rebuild a Rochester Quadrajet 4MV carburetor
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==Tuning== | ==Tuning== | ||
| + | Some basic [http://www.73-87.com/7387garage/drivetrain/myqjet.htm tips and links], from from 73-87.com. | ||
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| + | ===Basic adjustments | ||
| + | [http://vetteworks.tripod.com/qjet.htm Rochester 4MC, 4MV, M4MC, and E4ME Carburetors] from vetteworks.tripod.com | ||
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| + | ===Idle=== | ||
| + | *[http://www.73-87.com/7387garage/drivetrain/qjetidle.htm Q-jet Idle Problems] from 73-87.com | ||
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===Idle discharge ports=== | ===Idle discharge ports=== | ||
The idle discharge ports that are controlled by the idle mixture screws can be anywhere from around 0.050" to 0.080" diameter. If you find a lean idle condition that doesn't seem to respond to turning the screws CCW, you can gauge the port size using your small numbered drill bit index, then enlarge it one size at a time until you regain control with the screws. | The idle discharge ports that are controlled by the idle mixture screws can be anywhere from around 0.050" to 0.080" diameter. If you find a lean idle condition that doesn't seem to respond to turning the screws CCW, you can gauge the port size using your small numbered drill bit index, then enlarge it one size at a time until you regain control with the screws. | ||
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[[File:ANEROID OR FILLER SPOOL DETAILS.jpg|thumb|left|600px|Early APT, ca. 1975]] <br style="clear:both"/> | [[File:ANEROID OR FILLER SPOOL DETAILS.jpg|thumb|left|600px|Early APT, ca. 1975]] <br style="clear:both"/> | ||
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| + | ===Secondary tuning=== | ||
| + | #[http://www.73-87.com/7387garage/drivetrain/damon.htm Performance Tune Your Q-jet Secondaries, Part 1] from 73-87.com | ||
| + | #[http://www.73-87.com/7387garage/drivetrain/damon2.htm Performance Tune Your Q-jet Secondaries, Part 2] from 73-87.com | ||
==Casting smoothing== | ==Casting smoothing== | ||
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