What did you do with your truck today, Part 3

[ChuckDriver]

Originally Posted by OrrieG

Wrestling with carb linkage. Turns out the linkage from 62 PU that I used for the 2GC and Holley does not want to work for the Qjet, not enough travel to open the secondaries. Have about 8 hours in trying different rod and bracket configurations. Now going to get a 73-87 truck cable assy and use that. I had two from donor trucks I sold for half what it is looking like I will need to pay to get one 8^((

Do the Qjet secondaries open mechanically with the linkage? I always thought they were vacuum operated not mechanical.

[OrrieG]

The one I have the bottom butterflys are mechanical, uppers are vacuum. I think the bottom control the air flow, top open the secondary fuel jets. The bottom shaft will not rotate until the choke plate is fully open so you cannot go to WOT when the engine is cold.

Anyway, went back out a figured out I was attacking the problem backwards. I was starting with the closed position and trying to get full open before the pedal inside bottomed out. Reversed the process, started with WOT and pedal on the floor, then worked length and angle of bend in the rod to get it to work. I did have to lengthen the lever arm on the firewall side of the pedal mechanism too.