haven't seen much on these so starting a thread
https://datsun1200.com/modules/mediawiki ... Carburetor
https://www.mazdatrucking.com/B2200/5200.html
(9.5 megs dload pdf)
https://www.google.ca/url?sa=t&rct=j&q=& ... 7178,d.b2I
https://www.google.ca/search?q=holley+5 ... 2AWD4IH4AQ
https://www.google.com/search?hl=en&lr= ... er+32%2F36
https://www.redlineweber.com/html/Tech/T ... ntents.htm
https://datsun1200.com/modules/mediawiki ... Carburetor
Airflow, CFM
5200 series carbs are mostly fitted with 26mm primary and 27 mm secondary venturis, giving 270 CFM @ 3 inches mercury (note that this is equivalent to a 4-barrel type rating of 193 CFM -- 4-barrel carbs are rated at 1.5 inch mercury).
* 270 CFM: 26/27 venturis (193 CFM equivalent to 4-bbl style rating)
* 235 CFM: 23/27 (some, starting in 1978)
* 245 CFM: 23/29 (1979 up Chevette)
The 245 CFM model sounds like a good candidate for a 1200cc engine as compared to the stock Hitachi carb's 20/26 venturis.
Holley 6500
The Holley 6200/6500 is a feedback version of the 5200 carburetor, an electronically controlled jet system. Early models used a vacuum switch while newer models used an O2 sensor (Lambda sensor).
Holley previously sold an electronic "dial a jet" package that would plug into the 6500, bypassing the oxygen sensor and letting you control the amount of fuel through a dial on the dashboard. This was the "Holley Electronic Carburetor" system with a 11-position controller module, that varied mixture about 12 jet sizes just by turning the dial. A "computer" was optional and monitored fuel economy and other factors.
reference: Aaron
The 6500 used a modified power valve assembly. Instead of a simple open/closed valve, this is a metred valve. It is controlled by a needle raised/lowered by a solenoid on the carb.
Components needed are:
Carb
Lambda (Oxygen) sensor (for 6510/6520 models)
Control box
Solenoid and Vacuum Control Valve
Wiring
https://www.mazdatrucking.com/B2200/5200.html
(9.5 megs dload pdf)
https://www.google.ca/url?sa=t&rct=j&q=& ... 7178,d.b2I
https://www.google.ca/search?q=holley+5 ... 2AWD4IH4AQ
https://www.google.com/search?hl=en&lr= ... er+32%2F36
https://www.redlineweber.com/html/Tech/T ... ntents.htm