MerCruiser 4.3 liter

[E Alan]

I have a fuel-injected 4.3 liter MerCruiser (210 h.p.). I’m trying to determine how many cubic feetper minute of air that fuel injector draws. Alternately, how many cfm of air does the carb on the 190-hp 4.3L MerCruiserpull?

 

[bbrackett]

I have a fuel-injected 4.3 liter MerCruiser (210 h.p.). I’m trying to determine how many cubic feetper minute of air that fuel injector draws. Alternately, how many cfm of air does the carb on the 190-hp 4.3L MerCruiserpull?

I think they are good up to 500cfm? .. I think they are similar to what's on the old 305ci's/5.0L and 4.3L truck engines.

use this Calc - https://www.summitracing.com/expertadviceandnews/calcsandtools/cfm-calculator

262ci x 4800 rpm = 310-400

Street Carb CFM : 309.31

Racing Carb CFM :	400.28

 

[E Alan]

Very helpful. Thank you.