Anyone know the color code for the vac secondary springs supplied with the avenger carbs? What color spring is installed stock from the box? thanks, Craig

craig;
The Holley Street Avenger 770 comes stock from the factory with the Silver Spring installed. The softer spring is the yellow one, and the stiffer spring is the black one.
The 870 carb comes with a pink spring installed. Hope this helps.

This is from Holley, the RPM range is based on a 350ci mill, more ci's the sec's open sooner, less ci's the sec's open later...

Color----Load------opening-rpm----full open
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

White---Lightest
Yellow*--Lighter-------1620------5680
Yellow--Light---------1635------5750
Purple--Med. light----1915------6950
Plain---Med-----------2240------8160
Brown---Med. heavy----2710------8750
Black---Heavy---------2720------not full open

*short spring (if you find other colors short and tall I believe the rule of thumb is the shorter starts opening sooner)

great info, Thanks Guys!!! Looks like the one installed in mine is the "performance" yellow spring. graemlins/thumbsup.gif I was curious if it was changed from stock installed spring. Looks like the dyno guys made the swap when they ran the motor in on the stand.

FYI,I run the lightest yellow in my car..no bogs either..secondaries arent fully open until about 4800 or so