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Digital Tuning What should I set my AFR to?

  • Thread starter Thread starter marxpreston11
  • Start date Start date Jan 29, 2020
M

marxpreston11

Member
Jul 15, 2019
58
2
18
Wichita Kansas
Jan 29, 2020
#1
  • Jan 29, 2020
  • #1
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.
 

a91what

SendMeUrDataLog
10 Year Member
Apr 6, 2011
10,739
6,721
214
Hillsborough county
Jan 29, 2020
#2
  • Jan 29, 2020
  • #2
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.
 

96pushrod

I think they're a little easier to get off
5 Year Member
May 15, 2018
1,530
871
133
Savannah
Jan 29, 2020
#3
  • Jan 29, 2020
  • #3
Do you have a wideband on the car?
 
M

marxpreston11

Member
Jul 15, 2019
58
2
18
Wichita Kansas
Jan 31, 2020
#4
  • Jan 31, 2020
  • #4
96pushrod said:
Do you have a wideband on the car?
Click to expand...
yes i do currently have a wide band on the car.
 
M

marxpreston11

Member
Jul 15, 2019
58
2
18
Wichita Kansas
Jan 31, 2020
#5
  • Jan 31, 2020
  • #5
a91what said:
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.
Click to expand...
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
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,926
10,572
203
polk county florida
Jan 31, 2020
#6
  • Jan 31, 2020
  • #6
Carb tuning is an art, throttle blade open too far, blown power valve, idle circuit off, alot of stuff to look at.
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,096
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Box behind Walmart
Jan 31, 2020
#7
  • Jan 31, 2020
  • #7
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
27,926
10,572
203
polk county florida
Jan 31, 2020
#8
  • Jan 31, 2020
  • #8
^^^ don't pay any attention to him ^^^
He can't remember what a carburetor looks like.
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
43,096
21,280
234
Box behind Walmart
Jan 31, 2020
#9
  • Jan 31, 2020
  • #9
I have one in my museum

*chorus*
 
M

marxpreston11

Member
Jul 15, 2019
58
2
18
Wichita Kansas
Jan 31, 2020
#10
  • Jan 31, 2020
  • #10
General karthief said:
^^^ don't pay any attention to him ^^^
He can't remember what a carburetor looks like.
Click to expand...
it's alright all are can be replicated and google!
 
M

marxpreston11

Member
Jul 15, 2019
58
2
18
Wichita Kansas
Jan 31, 2020
#11
  • Jan 31, 2020
  • #11
marxpreston11 said:
it's alright all are can be replicated and google!
Click to expand...
Art... damn phone
 
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