[Greg Reid]

Does the secondary rod hangar come up as the rod letter goes up? In other words, is a K going to raise the rods higher than a J ?

[johnta1]

A rich hanger would be like 'B', 'C' or something.
Middle of road would be 'J', higher alphabet hangers would be leaner, possibly not useful.


They don't really affect full open richness, mainly the initial opening of secondary air valve to maybe half open air valve?

[Greg Reid]

Ok, so the higher the alphabet, the leaner the hanger. I have read something that tells the measured difference in height between each alphabet but doesn't point out which way is which.
For instance, Cliff refers to a hanger being G 'or higher'.... That led me to believe that higher would be up the alphabet scale and l guessed richer.. but no?

[johnta1]

Overall the hanger doesn't change it much at all compared to a rod change.
Like you can't make a leaner rod rich enough to get to the next rod size.
Be like going 1/4 jet size up or down?

The holes the rods hang from are lower I think on the higher alphabet letters. Which is leaner.

I never really worried about the hangers, just the rods.
Modified most of mine to get more out of them.
If I did do anything with the hanger, I just bent the hole(arm) to where I wanted it.

Also the spring tension on the flap was a great way to get the best action.
(more adjustment/effect from it than hanger)

[Greg Reid]

Ok,sounds good. I have a few different ones and wondered about which one was more desirable. Thanks for the explanation.

[Torquewar]

The hanger does have a impact on power .On my day long dyno tests we played with both of my carbs. Picked up some good info.
The hanger on my Q-Jet designated as a p wasn’t accurate?. My engine guy a very good quad guy and super stock racer checked the hanger. He had a gauge block and mine was 4 letters out. Don’t know why it was bent but after corrected , a increase of 26 hp resulted. I never felt anything the previous 5 yrs the carb was on and I raced it many times. I’m in no way a carb expert but fuel delivery in this instance made a significant result.

[Greg Reid]

Well that brings up another thing... Why go through the whole letter thing when a slight bend in the hanger could do the same thing?

[Kenth]

The secondary rod hanger was picked at the flow test fine tuning at the factory.
The early style hanger, pre -68 no-letter, was bent to spec., later on the letter style hanger was used (to save time at test?).
B hanger places the rods in a higher location (richer/faster) than a V hanger which hangs the rods in the lowest position, (leaner/slower).
The B hanger starts at .520" height, C hanger at .525", D hanger .530" and so on with .005 steps all the way down to the V hanger.
Only service hanger was the V hanger #7034522.
Also, the opening rate of the air valves has to be considered finetuning the secondary rod/hanger combination since the cam on the air valve shaft controls the lift of hanger..

Hope this helps some.

[steve25]

its far easier to just make some shims to install under the hanger from a old set of feeler gauges!

All you have to do is heat them up to red hot ( untermper them) and back the flame off and cool them slowly and they will cut up much easier.

You can also drill some new holes in the hanger also

[Sirrotica]

If I remember correctly on each letter either up or down was .005 difference.

Roughly 16 choices is a total variance of .080 top to bottom of the letter scale.

[Greg Reid]

It seems unanimous.. l found an old tech article that also states that each letter up raised the hanger .005".
Looks like any of the hangers l have, K, L or M would be ok for my purposes.