BBD reference page?

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dddDuster

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I bought a BBD from a member here, now I want to put a kit in it. Tag says 8187s, I was trying to find a reference of what is was on so I can look at jet and meter rod sizes to see if close for my 198. Thanks!
 
dddDuster said:
I bought a BBD from a member here, now I want to put a kit in it. Tag says 8187s, I was trying to find a reference of what is was on so I can look at jet and meter rod sizes to see if close for my 198. Thanks!
Click to expand...

carb list.jpg
 
Carburetor operation and repair manuals and links to training movies and carb repair/modification threads are posted here for free download.
 
Ok, thanks all! I’m at 5200’, I’m thinking I need to maybe decrease jet size and perhaps use the higher altitude metering rods if they have them for this. When I did my Jeep’s YF, that’s what I needed to do to keep it from running pig rich. What say you all?
 
I'm at 5100 feet and tried leaning out my bbd ( sea level car) ran like crap. Put original jets in and runs great.
 
Stock jet size was .086 next size down would be .083 if need be. Custom metering Rod adjustment maybe a lighter step up Spring
 
Is there any corralation between bbd jet number and size.

310 vs 301 vs 294 etc
 
In That linked post with The Carter sheets actual part number is 120-386 and next to that Is .086 120-383 would be .083. Edelbrock Jets will fit
 
BBD-4116SA (CAP, 273, automatic)

Then that would make it:
120-310S ( 0.010"?) Standard
120-294S (0.094" ?) 1 step lean
120-297S (0.097" ?) 2 step lean

Doesn't make sense????

Screenshot_20210504-233631.png
 
1974 BBD carburetors and up used a simple correlation system between jet numbers and size,as shown in above post. The 1973 and older BBD carbs used a different system regarding jet numbers and size. Maybe Bugman can give a more thorough explanation.
 
townsend said:
1974 BBD carburetors and up used a simple correlation system between jet numbers and size,as shown in above post. The 1973 and older BBD carbs used a different system regarding jet numbers and size. Maybe Bugman can give a more thorough explanation.
Click to expand...
 
1974 and up bbd solid fuel design main metering system. 1973 and back air bled main metering system. Two completely different systems. Theory of operation and part style and numbering systems. In the solid fuel type carburetor circuit timing is affected by the actual level of fuel in the bowl. High fuel level main system activates early, low fuel level main system activates late. In Air bleed carburetors actual operating air fuel ratio is sensitive to the level of fuel in the bowl
 
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