changing q-jet secondary rods

[Dave1695]

how many sizes down should one go to see a difference (better or worse) on the secondary rods of a q-jet? This is on a small block stocker engine.

[Mike Pearson]

What do you have in it now and who built the carb?

[Mark Yacavone]

I'd say 5-6 thou, depending on what's available..
If you're still foot braking, you might see a change with the hanger too.
Try to stay in the median alphabet range
It your carb won't run that way, there's always the seat of the pants method..Almost lost in this day and age.

[Xbody]

Originally Posted by Mark Yacavone

I'd say 5-6 thou, depending on what's available..
If you're still foot braking, you might see a change with the hanger too.
Try to stay in the median alphabet range
It your carb won't run that way, there's always the seat of the pants method..Almost lost in this day and age.

Mark,please define median alphabet range

thanks john

[Mark Yacavone]

Originally Posted by Xbody

Mark,please define median alphabet range

thanks john

Hangers are lettered A-V I think. Each letter down the alphabet will pull the sec. rod out of the jet .005 later.
Starting with say a K, L M will give you room to fine tune in either direction.

[Dave1695]

Had 57s on a J in it last night, switched to 55s on the same J, no difference. Don't have too many rod sizes, just put 44s on the J for next week. Have an H and I that could go in too.