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Pros / Cons to going full-on Speed Density?
Pros / Cons to going full-on Speed Density? I am considering doing this simply because it would be nice to be able to eliminate the MAF sensor / housing from my car to free up some space to locate nitrous nozzles. From a performance / drivability standpoint what would be the pros and cons of running MAFless?
TECH Enthusiast
Joined: Nov 2006
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From: Katherine N.T Australia
There are no cons to running MAFLESS if its done right and a capable COS is used. Pros are improved throttle response and a power gain due to the removal of the MAF restriction also no need to worry about a dirty MAF skewing you airflow readings. I know its not as common in the states but in OZ we have mastered the process to a point where 90% of modified LS1's are running around Semi OLSD. Back in the day OZ's highest output factory released LS1 came out MAFLESS.. Thats pretty much what started the trend over here.
Yup, I dont see any downfalls at all when done correctly.
One less sensor to die or mess things up... I drive maf less cars all year long in -20 to 110 degree weather with no issues... Fuel always goes where it needs to be..
One less sensor to die or mess things up... I drive maf less cars all year long in -20 to 110 degree weather with no issues... Fuel always goes where it needs to be..
Is a SD tune affected by elevation change. Living in Denver, my weekend cruises I can easily go from 5000 to 13000 feet in elevation. The air gets pretty thin up high is that anything to be worried about with a maf less tune.
TECH Enthusiast
Joined: Oct 2002
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From: NJ
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hey i dont wanna hi jack your thread but to do a SD to do you just have to get the 2 bar map snesor from the Supercharged cobalt and just trash the MAF and thats it and the tuner does the rest? or is there anything else i will have to do?
LS1's come with a 1-bar map sensor located on the back side of the intake manifold. Cars running forced induction typically require a 2 or 3-bar map sensor to run SD full time. So to answer your question - just remove the MAF (physically AND in the PCM).
TECH Enthusiast
Joined: Nov 2006
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From: Katherine N.T Australia
Yeah but it doesn't have VE/IAT factoring so its a flawed OS for running OLSD. EFI LIVE's OS3 or OS5 has everything you need to run OLSD in all weather conditions. Plus its free
And what's the difference between a 1 bar and a 2 or 3 bar?
TECH Enthusiast
Joined: Nov 2006
Posts: 620
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From: Katherine N.T Australia
Pro's and con's of SD have a lot to do with it though. Using HPT with no IAT/VE correction will result in an SD tune that won't account for weather correction. Thats a pretty big con for going SD. Use EFI LIVE and its not a problem and you have no cons.