question about mafs....
On The Tree
Joined: Sep 2004
Posts: 168
Likes: 1
From: Woodland Hills, Ca
Originally Posted by slowassta
im swaping an LS1 into a LT1 car. My ? is do i have to get an LS1 maf or can i still use my LT1 maf... thanks
for an LS1 program. That's it. You're ready to go. Trending Topics
Originally Posted by 67RSCamaroVette
How do you run it without a MAF? I don't have one on my engine, and if i can run it without, that'd be awesome. Is that what "closed loop" means?
olly
olly
Closed loop is the one that requires a MAF. Closed loop refers to a feedback/adjustment cycle between the MAF monitoring incoming air and the oxygen sensors monitoring air/fuel ratio in the exhaust and the computer adjusting fuel accordingly.
Without a maf your in open loop and the computer refers to tables to adjust fueling, its commonly referred to as speed density mode. You would need some tuning software to adjust the tables that the computer refers to to match your setup then you can go mafless.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
not totall correct on the open closed loop.
MAF and open closed loop have nothing to do with eachother.
Open loop, meaning the computer is only relying on inputs for airflow, through maf and SD calculations to determine the airflow, and providing the correct fueling, without feedback from to o2's to determine if the fueling is correct.
Closed loop, the computer uses the o2 sensors to provide feedback to alter fueling to reach the stoich point of the fuel, with gasoline, 14.6x is the typical airfuel ratio you achieve.
MAF, meaning the computer uses both the maf and the VE tables/map sensor to do the dynamic airflow calculations
SD, the comptuer is only using the VE tables, and map sensor to calculate airflow, to then caluclate fueling.
You can run in any of the following situations:
MAF, Open loop
MAF, Closed Loop
SD, Open loop
SD, Closed Loop.
Ryan
MAF and open closed loop have nothing to do with eachother.
Open loop, meaning the computer is only relying on inputs for airflow, through maf and SD calculations to determine the airflow, and providing the correct fueling, without feedback from to o2's to determine if the fueling is correct.
Closed loop, the computer uses the o2 sensors to provide feedback to alter fueling to reach the stoich point of the fuel, with gasoline, 14.6x is the typical airfuel ratio you achieve.
MAF, meaning the computer uses both the maf and the VE tables/map sensor to do the dynamic airflow calculations
SD, the comptuer is only using the VE tables, and map sensor to calculate airflow, to then caluclate fueling.
You can run in any of the following situations:
MAF, Open loop
MAF, Closed Loop
SD, Open loop
SD, Closed Loop.
Ryan
