Digital Tuning What should I set my AFR to?

marxpreston11

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Jul 15, 2019
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I have a 93 302, trick flow heads e303 cam. She is carbureted. Now I already know my punishment of owning this car means I get terrible gas mileage. So what's a good AFR for the best power? Edlebrook carb. 4 barrel double pump.
 
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a91what

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uhh whadaya mean bad fuel milage?? my supercharged convertible got over 25mpg..

The AFR will differ based on the condition I will list some general AFR guidelines to follow

Idle - 13.5-14.7 depends on the setup most carbs will want to idle a bit fat.
Cruise- 14.4-15 AFR
WOT- the most widely accepted power AFR is 12.5 but this can be anywhere from 12.0-13.3 on the setup.
 

marxpreston11

Member
Jul 15, 2019
21
2
13
19
Wichita Kansas
uhh whadaya mean bad fuel milage?? my supercharged convertible got over 25mpg..

The AFR will differ based on the condition I will list some general AFR guidelines to follow

Idle - 13.5-14.7 depends on the setup most carbs will want to idle a bit fat.
Cruise- 14.4-15 AFR
WOT- the most widely accepted power AFR is 12.5 but this can be anywhere from 12.0-13.3 on the setup.
hahah. I wish i got more that 10mpg. i dont tho. Right now my idle is about 16 to 17. I think im going to need a good clean of the ole carb
 
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