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Post '75 primary rods

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scottyp99:
Hi, are you guys going to make any other sizes of the "K" rods available? I need some smaller than 44, thanks

Scott

Cliff Ruggles:
We don't like or use the "K" series metering rods.  They only allow .005" of taper on the upper section for adjustment.  We have full tapered .044" metering rods, which taper gently from .044" down to .041", then on down to the .026" tips.  I use them in most of the later model carbs that we build here....Cliff

scottyp99:
I have a 1980 Corvette with L48 engine. Carb is not original, 17059222, I am told it came off of a 305 chevy Malibu. It came with 71 main jets and 40k metering rods. I installed 73 jets because I have an aftermarket intake, headers, and dual exhaust. WOT seems rich enough, but cruise is lean, I'm thinking about trying 74 jets, but if I need to richen up the cruise without richening up the WOT, I would like to have the option of installing different rods. What are my options when it comes to this? The .36 powertip rods that I know of only go down to 48M, which is still to lean at cruise, even with a 77 jet. I'm thinking I would like to try a 39k or 38k rod

scottyp99:
Wait, are you trying to say that one rod is used on all carbs, and just dialed in with the APT? My rods are 40, even if I adjust the APT all the way up, 41 is still too big, I need a smaller rod. What kind of options do I have here? Make the air bleeds smaller? I don't understand why nobody is making a product that there must be a demand for, I can't be the only one who wants to tune a M4M. I have 74 and 75 primary jets, I guess I'll pop the 74s in and see if that richens up the cruise without making WOT too fat.


Scott

Cliff Ruggles:
The metering rods we sell are FULL taper, not "stepped" like the "K" rods.  The lower part of the taper down to .026" is just quicker than the upper section.

The carb you are working with is lean because it has the large main airbleeds.  It will take HUGE jets to get it even close, and it will still be lean at part throttle.

We have drive in main airbleeds which will bring in a lot more fuel with smaller jets, and make it much easier to tune....Cliff

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