General Category > Quadrajet Carb Talk and Tips
what is meant by last letter in primary metering rods numbers
Frank400:
I'm talking late model carbs here, '76 and up APT models. I know what a 41, 42, 43 etc rods are. I know some of them have a .036" tip, the others have a .026" tip. But what does the P, K,M etc mean ? Is it the taper style ?
Frank.
Ethan1:
--- Quote from: Frank400 on September 25, 2014, 03:47:55 PM ---I'm talking late model carbs here, '76 and up APT models. I know what a 41, 42, 43 etc rods are. I know some of them have a .036" tip, the others have a .026" tip. But what does the P, K,M etc mean ? Is it the taper style ?
Frank.
--- End quote ---
The letter code at the end of the two numbers, denotes whether the rod is single or double taper and diameter of tip. "M" rods were double-tapered, w/ .032" diameter tip, "P" rods were double-tapered w/ .026" diameter tip, etc....
Frank400:
Thanks for the info, Ethan, but I only mentioned M, P and K, but are there any others that I should know about ? What about the configuration of the K rod ?
Ethan1:
--- Quote from: Frank400 on September 25, 2014, 06:16:01 PM ---Thanks for the info, Ethan, but I only mentioned M, P and K, but are there any others that I should know about ? What about the configuration of the K rod ?
--- End quote ---
"A" rods were single-tapered, .026" diameter tip.
"B" rods were double-tapered, .026" diameter tip.
"C" rods were double-tapered, .026" diameter tip.
"D" rods were double-tapered, .036" diameter tip.
on and on.....
"K" rods were double-tapered, .026" diameter tip as well.
There were several over the years. ;)
Frank400:
Wow ! thanks for the info.
Frank.
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