Ruby lacks power

[Alan]

I’d kind of expect your RN to see off a Ruby, but a GG seems quite a weak needle. My Chumm works well on an AN and a 1 1/8” SU, but really you should get it properly set up on a rolling road if you are in doubt. There are so many variables that it’s safe to say that which works on my car may not on yours. A half hour on a rolling road with someone who knows SU carbs will sort it.