Pros / Cons to going full-on Speed Density?
#1
11 Second Club
Thread Starter
iTrader: (3)
Join Date: Dec 2005
Location: Wichita, KS
Posts: 224
Likes: 0
Received 0 Likes
on
0 Posts
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?
#2
TECH Enthusiast
Join Date: Nov 2006
Location: Katherine N.T Australia
Posts: 620
Likes: 0
Received 0 Likes
on
0 Posts
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.
#4
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.
#7
Trending Topics
#9
TECH Apprentice
iTrader: (1)
Join Date: Mar 2006
Location: Burton, MI
Posts: 336
Likes: 0
Received 0 Likes
on
0 Posts
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?
#12
TECH Addict
iTrader: (10)
Join Date: Jun 2004
Location: Commerce Twp, MI
Posts: 2,918
Likes: 0
Received 0 Likes
on
0 Posts
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).
#13
TECH Enthusiast
Join Date: Nov 2006
Location: Katherine N.T Australia
Posts: 620
Likes: 0
Received 0 Likes
on
0 Posts
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
#17
LS1TECH Sponsor
iTrader: (2)
#20
TECH Enthusiast
Join Date: Nov 2006
Location: Katherine N.T Australia
Posts: 620
Likes: 0
Received 0 Likes
on
0 Posts
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.