I've got a RB SP Holley setup, and it's running rich as crap on my decent-sized SP 12a. I called up RB, but they won't tell me the stock jet sizes on the SP setup. Proprietary information or some BS. I do have a true RB Holley, but it's second hand. Can anyone PM me the stock jet sizes so I have a baseline to start out with?

Thanks,

Bryan

 

The primary jets are 49. Attached is "as found" details on a secondhand (but told it was not touched) RB holley 465 cfm for a 12A streetport. YMMV.

 

I mean Stock Port, sorry your SP means street port. What I listed is what I found for the stock port 465.

 

Yea, I think the primary and secondary jets are a little larger on the SP. I have a kit that goes from 0.063" to 0.099" which I thought would be way too big. It's a kit from a Holley 850. I'll try going from what it has, and buy 4 jets 2 and 3 steps smaller. That black WOT cloud sucks. So does driveability. But I my Sterling will be here in the near future, so I can ditch this piece of crap.