Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: Frank400 on September 25, 2014, 03:47:55 PM

Title: what is meant by last letter in primary metering rods numbers
Post by: 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.

Title: Re: what is meant by last letter in primary metering rods numbers
Post by: Ethan1 on September 25, 2014, 05:34:58 PM

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.

 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....

Title: Re: what is meant by last letter in primary metering rods numbers
Post by: 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 ?

Title: Re: what is meant by last letter in primary metering rods numbers
Post by: Ethan1 on September 25, 2014, 06:23:24 PM

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 ?

 "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. ;)

Title: Re: what is meant by last letter in primary metering rods numbers
Post by: Frank400 on September 25, 2014, 06:25:02 PM

Wow !  thanks for the info.

  Frank.

Title: Re: what is meant by last letter in primary metering rods numbers
Post by: Ethan1 on September 25, 2014, 06:31:02 PM

 Not a problem. I also believe there were some triple-tapered rods as well. Just cannot remember which. ???