Stromberg Carby Jets and Carby Specs

[willo]

Hi all,
this might sound like a silly question but... i cannot for the life of me find a listing of *standard* jet sizes for the 173/202 Stromberg Carby on the net.

I've searched the old holden site etc etc without success

i can find all sorts of numbers that refer to venturi sizes for the different carbys and what one person has *found to run the best* which is always a debatable point anyway.  But, i cannot find a table that shows all the original jet sizes for the various Stromberg carbys so I can establish a baseline with my carby tuning.

I recently put a kit through the carby and found a #65 main jet.  geez, it is big enough to drink a milkshake through!!!  I suspect that it might have had an adjustable main jet and someone has only removed the outside bit and left the bigger main jet inside the carby because it is too hard to get at.

has anyone got any suggestions where to look?

If this info doesn't exist around the traps what do you reckon if i set up a spreadsheet and people can add their own info so a comparable dataset can be developed.  Chances are that not too many 35 year old Strombergs will have the original jets but by comparing a heap of them we should get a pretty good list to compare sizes (and fuel economy if interested?)

Cheers

Neil

[MaTTe]

hey mate, we race with 69-71 on 98octane, but have been as high as 79 and i think we have an 83 from the good old days of Avgas and Elf Solaize..

65 should be alright on a fairly standard motor, but if you feel its too rich (lamda meter is the best way to know for sure) you can peen the end down and redrill it to a smaller size. best bet is to get a couple of jets, and peen them down and drill them to different sizes so you can give them a real world test, and then swap them over to the next one and repeat.

You'd be surprised how many hours we've spent at the track doing just this over the years..