Holley Truck Avenger 670 carb set up

[juggernaught]

Just thought I would give a little info about what I ended up with while going through the set up process on my Holley for an: amc 360 with a 9:1 compression and a comp 260H cam.

First: there is no way that this carb would have worked properly out of the box.

Stock..25cc accel pump

Stock...o65 power valve

#62 jets in primary (#68 stock)

#74 jets in secondary (#89 stock)

silver(plain) secondary spring (nothing lighter)

red or orange cam on position #1 (light vehicles)

.031 pump discharge nozzles (.028 stock?)

Keep the floats level and the fuel beow the sights for the best offroading.

Distributer adv. @8-10*

I live at 3,700 ft. and although Holley recommended downsizing to #64 I found #62 to work best. #89 jets for the secondary are silly.

While I only see 14-15" of vacuum at Idle, the performance both on and off road is excellent. Idle at severe angles is constant, and engine restarts without floooding.

Hope this helps someone else, as I had to go through many trial and errors to find out these basics.

[tufcj]

I've read that Holleys come out of the box jetted for 70 degrees and sea level. you need to drop at least 1 jet size for every 2000 feet of elevation gain, and more for cooler temps.

On my 600, I went down 4 sizes on the mains and 6 sizes on the secondaries when I moved to Denver from Chicago.

Bob
tufcj