General Category > Quadrajet Carb Talk and Tips

Sec Hanger Height

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von:
I guess I'd still like to know what the definition is of "G or higher", per the second recipe in your book. Would an F fit that description or would it be an H, all else aside?

kamcoman:
As I understand the response from Cliff about "higher letter = lower hanger" I am assuming that the letter A is considered letter #1 in the alphabet, therefore the "lowest" letter.  This would also equate to the highest hanger (rods held higher in the secondary metering holes).  Therefore, when Cliff says a hanger F, or higher in his book, I think he means F, or G, H, I, and so on for higher letter (Z=#26).

If this assumption is wrong, please advise.  Von and I are trying to figure this out.  In Von's last question, H is higher than G as far as letters go, if my assumption is correct.

Keith

Toronado:
Well sounds like you could
get some different rods and test them out,
on the hanger than bend the hanger
if it needs further adjustment. No matter
what, you need to test them out at the track
to measure actual difference, the numbers
never lie, just go with which size gets you down the track the fastest and thats the size you need. I do get trying to follow the recipe in the
book, but you still have to test it out even if its the exact rod size you need.

Cliff Ruggles:
Something to keep in mind here, more important than hanger height, is that comparing metering rods on the dyno and/or at the track can be very miss-leading.

Unless all of your metering rods are cut from the same core, the results can be all over the place.

Quite a few of our customers have us custom machine sets of rods for them from the same cores.  This way they do NOT have to change hangers with each set of rods tested for direct comparisons.

What happens in actual use, is that you can go from a small diameter long tipped rod, AX for example, to a short tipped rod with a much smaller tip, and actually lean up the fuel curve.  This happens due to the fuels inability to flow around the fatter rod section into he hole in the casting floor as effectively.

Bottom line here, if you want to see precise changes when making metering rod changes, use the same metering rods with the tips custom machined to different diameters.  Then you can test them on the same hanger back to back, change hangers and test them again, etc, with accurate results.....Cliff

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