air fuel ratio
#1
Senior Member
MASTER BUILDER
Thread Starter
Join Date: Nov 2005
Location: Mobile,Al.
Posts: 127
air fuel ratio
whats is the best air fuel ratio set up for racing? have a air fuel meter that i got from a friend,and checked my motor.At 4800 to 5000 rpm it is around 14-9 15-2. is that a little lean 509 cid 950 carb
#2
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
That's darn near impossible to answer because of the factors involved.
Intake, exhaust, compression, heads, vacuum, and weather variables play too big of a part of it.
Every motor is going to have it's own 'fine point' with a/f ratio.
What's going to do the most justice for you is to find your best et, noting the a/f ratio and shoot for that ratio as weather conditions change.
Tuning for a specific a/f ratio or egt requires the use of a weather station and a knowledge on jet area as it relates to egt or a/f ratio.
Intake, exhaust, compression, heads, vacuum, and weather variables play too big of a part of it.
Every motor is going to have it's own 'fine point' with a/f ratio.
What's going to do the most justice for you is to find your best et, noting the a/f ratio and shoot for that ratio as weather conditions change.
Tuning for a specific a/f ratio or egt requires the use of a weather station and a knowledge on jet area as it relates to egt or a/f ratio.
#3
Senior Member
RACING JUNKIE
Join Date: Jul 2007
Location: Independence, Missouri
Posts: 1,181
a/f ratios
Originally Posted by OneBadGMC
That's darn near impossible to answer because of the factors involved.
Intake, exhaust, compression, heads, vacuum, and weather variables play too big of a part of it.
Every motor is going to have it's own 'fine point' with a/f ratio.
What's going to do the most justice for you is to find your best et, noting the a/f ratio and shoot for that ratio as weather conditions change.
Tuning for a specific a/f ratio or egt requires the use of a weather station and a knowledge on jet area as it
relates to egt or a/f ratio.
Intake, exhaust, compression, heads, vacuum, and weather variables play too big of a part of it.
Every motor is going to have it's own 'fine point' with a/f ratio.
What's going to do the most justice for you is to find your best et, noting the a/f ratio and shoot for that ratio as weather conditions change.
Tuning for a specific a/f ratio or egt requires the use of a weather station and a knowledge on jet area as it
relates to egt or a/f ratio.
#5
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
Never used a density gauge, sorry.
I have a Computech RaceAir Pro 1000.
http://www.computechracing.com/Produ...-portable.html
I don't know how I got along before I bought it.
I have a Computech RaceAir Pro 1000.
http://www.computechracing.com/Produ...-portable.html
I don't know how I got along before I bought it.