Are there any disadvantages when...???
Are there any disadvantages when...??? ...using Speed Density tuning. I mean, even if it only gains a couple horsepower, why wouldnt everybody choose this option. Most people try to squeeze out every last bit anyway right so why not here too??
it is squeezing the last couple bit of hp out of the car.
The disadvantage is you lose some compensation for the tune in different weather conditions, since you are "telling" the computer how much air is coming into the engine, vs calibrating the sensor that measures the airflow coming into the engine get get correct fueling.
Ryan
The disadvantage is you lose some compensation for the tune in different weather conditions, since you are "telling" the computer how much air is coming into the engine, vs calibrating the sensor that measures the airflow coming into the engine get get correct fueling.
Ryan
The MAF compensates a lot for tuning errors.
SD mode does not, so you must do a much more thorough job of getting the tune right. A lot of people don't want to invest that much time.
SD mode does not, so you must do a much more thorough job of getting the tune right. A lot of people don't want to invest that much time.
Last edited by white2001s10; Mar 29, 2006 at 09:05 AM.
& SD mode all the time would require a new tune for each successive mod & a good amount of monitoring on a full time basis not to mention it wont pass the new OBD2 tests at least not that I know of. So its probably not the most or most pratical option for a mostly street vehicle. I want to get every last bit of power out of my car but this almost seems like its not worth it.
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
^^^ all depends on how much time you want to spend scanning and tuning 
I run SD on my TA... but it only sees the street 2.5 seasons a year on nice days and only a few thousand miles
I run SD on my TA... but it only sees the street 2.5 seasons a year on nice days and only a few thousand miles
I always try to dial in the ve/maf tables and throw the car back into closed loop/maf...since the maf can still make alot of adjustments when adding mods. Most people add one thing at a time rather then throwing 10 grand at a car all at once...keeping the maf in play for most is the best way to do it.
Trending Topics
TECH Enthusiast
Joined: Nov 2004
Posts: 600
Likes: 0
From: Coppell,TX
you can get the same amount of power out of both a MAF and SD tune(in theory), but the problem is that inorder for a MAF tune to be spot on your VE(SD Tuning) must be dead on. Therefore the amount of time to get a MAF tune is not worth it to most people with a Tuning suite. Thats my take on the situation.
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
Originally Posted by nokeman
So its probably not the most or most pratical option for a mostly street vehicle. I want to get every last bit of power out of my car but this almost seems like its not worth it.
Like I said I've never done this, but I don't see why you couldn't do it.
There's something in the code already to the effect of swapping to fuel calculation at 4000 RPM. I'm not sure yet what that means though. A good tuner could sort it out in a short time in any case.