Thermoquad 1966 Metering Rods

Well that’s the craziest thing I’ve heard of in a while.

If you’re going to run without metering rods, you’re going to have to find a jet small enough to do this. It’s all in the math.

98 jet with a let’s just go with a 67/52/45 rod (That’s the 1966 rod) .098 - .067 = .031 total area of the circumference of the interference of the rod inside the jet.

Now you need a jet @ .031.

Now let’s look at the medium size of the rod. Which is used in a part acceleration on a small dip in engine vacuum.
.098 - .052 = .046
And then again at WOT
.098 - .045 = .053

This is how metering rods work, by metering the fuel going in under certain conditions. One size does not fit all. If you’re going to drag race this only, you’re going g to need to find out what size jet will work under WOT conditions only and never care about how stupidly eye burning rich it is at idle. Driving around will be super limited due to extremely quick plug fouling. By stock in what ever plug company your using.

PS, you’ll never find a jet that small unless you have it done custom.