Air Fuel ratio 14.6-14.7 at WOT is the best?
#1
Air Fuel ratio 14.6-14.7 at WOT is the best?
Ok I have been doing some searching and found based on what i read is that the airfuel ratio should be at 13.0 to 1 at WOT. my friend tells me that the airfuel ration should be at WOT 14.6-14.7 to 1 at all times not matter what. what should i do. getting Lm1 meter next week and I don't know what to do/ What should my AFR be at WOT for Optimm performance.
#5
Yes my friend has experience in funny car dragsters with 572 cubic inch 2000 horsepower motors. Not to mention his father who has years of experience.
And won alot of races during his day. Still I don't know. I just hate having to think of running it at the track time after time to see what AFR works and beating on my motor that much.
And won alot of races during his day. Still I don't know. I just hate having to think of running it at the track time after time to see what AFR works and beating on my motor that much.
Trending Topics
#8
Originally Posted by SmokingWS6
Your friend makes baby jesus cry
https://ls1tech.com/forums/pcm-diagnostics-tuning/467804-efilive-tuning-help.html
Get a Wideband and the Software suite (Tuners or EFI Live etc.) and you will be on your way to impressing your Top fuel buddy and his dad with the power you, the average dude on the street can now get for a mere pitance compared to the small fortune that goes into a top fuel dragster team.
#9
Originally Posted by shaulinmathvader
Yes my friend has experience in funny car dragsters with 572 cubic inch 2000 horsepower motors. Not to mention his father who has years of experience.
And won alot of races during his day. Still I don't know. I just hate having to think of running it at the track time after time to see what AFR works and beating on my motor that much.
And won alot of races during his day. Still I don't know. I just hate having to think of running it at the track time after time to see what AFR works and beating on my motor that much.
#10
here is the problem with your friends knowledge. he doesnt drive the damn thing on the street. he drives it for a few seconds at a time. if he is familiar with it, then he should know that 1. we're talking about gas, not any other race fuel. the perfect burn for gas is 14.7:1. all the gas and air is combusted at that point. on a stock motor if your running that a/f at WOT, then plan on getting a new engine. dont get a WB just cause you wanna see. when your not in PE, you need to be at stoich, depending on what fuel your running as it changes with that.
#15
12 Second Club
iTrader: (10)
Joined: Sep 2005
Posts: 948
Likes: 0
From: From Ohio now in that state up north
DO NOT run your car at 14.7 at wot i dont think it would make more power for even 1 run (witch is what top fuel car motors have to last for) lean is mean but i dont like to be that mean to my motor . 12.8 is safe 13.0-13.2 is about as lean as i would go.
#17
Just got LM1 in and tested it on the oxygen sensor bung( 02 sensor not connected of course) and it richened out I am guessing because 02 sensor was not connected. It read from 11.8 to about 12.5 at WOT it gave me weird figures 20:1 and 35:1 but then again it was not under load and It hits rEv limiter rather quickly. I will be welding in Bung at Y pipe sometime this week and testing some things out by racing it on the street until track day. but you guys are right. I would rather be safe and save the motor.
just one more question. Not considering the damage to the motor. Would it give me more power to run 14.7:1 AFR WOT. If so I am guessing I would have to run high octane but how much?
just one more question. Not considering the damage to the motor. Would it give me more power to run 14.7:1 AFR WOT. If so I am guessing I would have to run high octane but how much?
#18
drag cars can run leaner, as they only make a few passes at a time. However, 14.7 is the theoretical perfect ratio, and it simply can't be achieved in the real world. In a streetable car, you need the extra fuel to burn all of the fuel, and the extra fuel helps quench the combustion chamber (stops from melting parts, and prevents detonation).
#19
Originally Posted by shaulinmathvader
just one more question. Not considering the damage to the motor. Would it give me more power to run 14.7:1 AFR WOT. If so I am guessing I would have to run high octane but how much?
Leaner = Power only to a certain point... 14.7 is well past that point on these engines...
It's like those that think the more timing you can run the more power you can make... there is a limit at which point you no longer make power... and eventually lose power...