5200 Jets

[t-west]

Hi all,

Below is from a former post for reference. Yesterday I got an email from Tom Langdon and he said that the secondary main is not, in fact, correct. He suggested that I put a 160 in the second, but that I leave the rest.

Other posts here seem to contradict this advice, so I'm looking for clarification. I know there are experts here and I've read everything that I can find here regarding jetting/tuning my 5200, but I can't find a jet kit for the 5200 that would allow me to play, and to put one together might be kind of expensive. I've already collected 8 different main jets!

Is Tom's adviced "adjusted" to fit our applications, or is it designed to fit the carb? Am I tuning a carb or a car? I've already installed 160's in the primaries and don't notice much difference.

Checked all the jets today and something seems screwy.

Primary main: 132
Secondary main: 135
Primary air corrector: 180
Secondary air corrector: 195
Primary idle: 10
Secondary idle: 80

I'm not sure why some numbers are 10 and some 180 -- are there two different measuring systems at work? Also, just to verify, I assume that the secondary valve is the one that opens last.

At any rate, I know my idle is too small -- my screw is backed out about 4 turns. From this post: http://fordsix.com/forum/viewtopic.php?t=23153 I gather that I might need to make the following adjustments:

Change the primary idle (from 10 to 75)
Change the secondary idle (from 80 to 65)

Change the primary main (from 132 to 160)
Change the secondary main (from 135 to 160)

Change the primary air (from 180 to 185)
Change the secondary air (from 195 to 175)

Change the Pump Jet from a 3(?) to 60.

Finally, my pump jet looks sealed off to the secondary. Is this normal? Because of the design it looks like it should be open, but maybe I'm not clear about its function.