Page 1 of 3 123 LastLast
Results 1 to 20 of 47

MAF vs Speed Density

This is a discussion on MAF vs Speed Density within the Computer & Tuning forums, part of the LSx Technical Help Section category; What is the advantage of a speed density tune over a MAF?...

  1. #1
    In need of another LS1 00blacktransam112's Avatar
    Join Date
    Aug 2008
    Location
    Sutton MA
    Age
    27
    Posts
    258

    Black
    2000 Pontiac TA

    MAF vs Speed Density

    What is the advantage of a speed density tune over a MAF?

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,785

    Red Tint Jewelcoat
    2008 Trailblazer SS

    In my opinion (I am NOT a tuner)...there is not much of an advantage either way.
    A properly tuned car should make the same power regardless of tune.

    The ONE advantage of an SD tune is if you have maxxed out your MAF.


    I stick with a MAF tune myself....as I travel from 5000 DA's to 15000 DA's some days in the summer.

  3. #3
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,520

    98 Formula
    06 duramax

    I'm moving this to the computer/tuning area.

    I've ran both SD and MAF tunes on my car. Seems like the car had a fewer little BS issues running in SD but probably not anything that I couldn't have tuned out using the MAF. I definitely prefer the way my car runs with the SD tune over how it ran with the MAF.

  4. #4
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    you deleted my post ?

  5. #5
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,520

    98 Formula
    06 duramax

    Quote Originally Posted by shady milkman View Post
    you deleted my post ?
    yes, because telling someone to search isn't a good post. The time it took you to type that out you could've offered up some useful info.

  6. #6
    TunedbyFrost.com Tuner Frost's Avatar
    Join Date
    Jul 2007
    Location
    Richmond VA
    Posts
    2,415

    LS1.com Sponsor
    GM Tuner

    Quote Originally Posted by Mr. Luos View Post
    ....


    I stick with a MAF tune myself....as I travel from 5000 DA's to 15000 DA's some days in the summer.

    If your SD setup is properly calibrated this is a non-issue; SD is based entirely around a pressure sensor.


    For GenIII cars, SD makes life easier and more driveable with large cams. The thing folks like most is that you get very very snappy throttle response when compared to the MAF. If you think your throttle response is good and you run a MAF, you haven't tried SD yet.

  7. #7
    Awaiting Activation
    Join Date
    Oct 2007
    Location
    NC
    Posts
    635

    SOM
    1998 T.A.

    That would be the MAP sensor........

  8. #8
    Member El Toro Loco's Avatar
    Join Date
    Jun 2008
    Location
    Harlingen, tx
    Posts
    757

    pewter
    2001 Trans AM WS6

    Quote Originally Posted by Frost View Post
    If your SD setup is properly calibrated this is a non-issue; SD is based entirely around a pressure sensor.


    For GenIII cars, SD makes life easier and more driveable with large cams. The thing folks like most is that you get very very snappy throttle response when compared to the MAF. If you think your throttle response is good and you run a MAF, you haven't tried SD yet.
    heard some guys from around here where im from say that there cars runs like it did when it was stock, and a couple of them are running ms4 cams, it doesnt sound as raddicle either.

  9. #9
    TunedbyFrost.com Tuner Frost's Avatar
    Join Date
    Jul 2007
    Location
    Richmond VA
    Posts
    2,415

    LS1.com Sponsor
    GM Tuner

    The MS4 is a very agree-able "large cam". I typically see better driveability from then than other smaller mega-popular grinds like the torquer cams (230-233 intake dur and 112LSA's). They are softer down low than a grind like that, but it's to be expected. They do indeed seem to run very well in SD cars.

  10. #10
    In need of another LS1 00blacktransam112's Avatar
    Join Date
    Aug 2008
    Location
    Sutton MA
    Age
    27
    Posts
    258

    Black
    2000 Pontiac TA

    what is the cost of converting to SD? would it make sense for a bolt on car or would the $$$ be better spent elsewhere?

  11. #11
    Awaiting Activation
    Join Date
    Oct 2007
    Location
    NC
    Posts
    635

    SOM
    1998 T.A.

    Quote Originally Posted by Frost View Post
    The MS4 is a very agree-able "large cam". I typically see better driveability from then than other smaller mega-popular grinds like the torquer cams (230-233 intake dur and 112LSA's). They are softer down low than a grind like that, but it's to be expected. They do indeed seem to run very well in SD cars.

    You are not the first one I have heard say this and I have always wondered why???

    My medium 230/234 cam sucks at cold start up and always knocks off if I don't feather the gas. Once shes rolling though it has GREAT manners and never gives me any problems. I had my tuner tweak the cold start tables once but it's still not that great.

    He is 90 miles away so it's not that easy to have him work on it some more.....

  12. #12
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,520

    98 Formula
    06 duramax

    Quote Originally Posted by 00blacktransam112 View Post
    what is the cost of converting to SD? would it make sense for a bolt on car or would the $$$ be better spent elsewhere?
    converting to SD is nothing more than having someone tune the ve table so you're basically looking at a tune. There's more to it than that but that's the short version. My opinion, and it's just my opinion, is that you'll be fine on the MAF. Even after a cam running on the MAF is a viable option for most cams. I would even go as far to say that most tuners will give you a better MAF tune than they would a SD tune just do to the time involved. I'm not saying they're cheaping out or not doing the tune correctly.....there's just less time invested to do a MAF tune than there is for a good SD tune.

  13. #13
    Awaiting Activation
    Join Date
    Oct 2007
    Location
    NC
    Posts
    635

    SOM
    1998 T.A.

    ^^^^ I agree wth this if you are not F/I or a balls to the wall build there is usually not much benefit.....

  14. #14
    Member El Toro Loco's Avatar
    Join Date
    Jun 2008
    Location
    Harlingen, tx
    Posts
    757

    pewter
    2001 Trans AM WS6

    IS IT generally more expensive fo rthe sd tune due to the time involved in it.

  15. #15
    TunedbyFrost.com Tuner Frost's Avatar
    Join Date
    Jul 2007
    Location
    Richmond VA
    Posts
    2,415

    LS1.com Sponsor
    GM Tuner

    Quote Originally Posted by SOMbitch View Post
    ^^^^ I agree wth this if you are not F/I or a balls to the wall build there is usually not much benefit.....
    SD has 'snappiness' that the MAF will NEVER touch though, and some people prefer that.


    Quote Originally Posted by El Toro Loco View Post
    IS IT generally more expensive fo rthe sd tune due to the time involved in it.

    Depends on your tuner, though it SHOULD be cheaper. If your tuner is being thorough, he is calibrating the VE and then the MAF. If you have stock internals, the need for VE tuning is mostly negated, but otherwise... it should be less work for the tuner as he otherwise would have to tune the VE and then the MAF, rather than just VE. Having said that, there are a lot of hacks out there, so just be aware.

  16. #16
    In need of another LS1 00blacktransam112's Avatar
    Join Date
    Aug 2008
    Location
    Sutton MA
    Age
    27
    Posts
    258

    Black
    2000 Pontiac TA

    so what is the difference between a 2 and 3 bar SD?

  17. #17
    LSwut tep98ws6's Avatar
    Join Date
    Jun 2009
    Location
    Saint Louis, MO
    Posts
    1,705

    Arctic White & Black
    '98 WS6 M6 - SWAPTIME!

    Very good info guys. I am on the wall deciding if I want to do MAF or SD ...but leaning towards SD.

    Quote Originally Posted by SOMbitch View Post
    You are not the first one I have heard say this and I have always wondered why???

    My medium 230/234 cam sucks at cold start up and always knocks off if I don't feather the gas. Once shes rolling though it has GREAT manners and never gives me any problems. I had my tuner tweak the cold start tables once but it's still not that great.

    He is 90 miles away so it's not that easy to have him work on it some more.....
    Mine does the same exact thing w/ a 231/231

  18. #18
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,461

    Black
    1999 TA WS.6

    Quote Originally Posted by 00blacktransam112 View Post
    so what is the difference between a 2 and 3 bar SD?
    Copied/pasted from HPtunerforum.

    1 Bar Map(Manifold Air Pressure)=reads up to atmospheric pressure or ~105kpa, used for Naturally Aspirated Vehicles

    2 Bar Map=reads 14.7psi+atmospheric pressure=~210kpa used for Forced induction vehicles up to 14.7psi of boost

    3 Bar Map=reads 29.4psi+atmospheric pressure=~315kpa used for Forced induction vehicles up to 29.4psi of boost.

    I still really like my SD tune. I will probably run a SD tune on my next build as well.
    370 CI - Twin 6766 Turbo - Jakes stage 5 4L80E - MWC 9" - Holley Dominator

    Build in progress...

  19. #19
    None Shall Pass Knight's Avatar
    Join Date
    Jan 2010
    Location
    East of Cleveland, Ohio
    Posts
    3,828

    Black
    99 WS.6 - Modified

    pretty true. I had the sd tune on mine for about $600 if i remember right, but i had just fininshed building the car (see 99ws6 in new member intros for mod list) and needed a dyno and computer tune anyways. wont really help much on a stock car but when your a hp freak like some of us you end up doing it.
    It's not how fast you can go. It's how fast you can get there.

    Follow us at www.facebook.com/RGCustoms

  20. #20
    In need of another LS1 00blacktransam112's Avatar
    Join Date
    Aug 2008
    Location
    Sutton MA
    Age
    27
    Posts
    258

    Black
    2000 Pontiac TA

    thanks guys

Page 1 of 3 123 LastLast

LinkBacks (?)

Thread Information

Users Browsing this Thread

There are currently 2 users browsing this thread. (0 members and 2 guests)

Similar Threads

  1. 1 Bar Speed Density tune
    By kogelch in forum GM Trucks
    Replies: 3
    Last Post: 11-19-2012, 06:07 PM
  2. speed density or maf tune
    By 65ls1 in forum Forced Induction
    Replies: 33
    Last Post: 12-21-2007, 06:10 AM
  3. speed density tuning
    By secondgearscratch in forum Computer & Tuning
    Replies: 2
    Last Post: 06-21-2007, 06:11 PM
  4. Speed Density-> Yes or no?
    By ewingr in forum Computer & Tuning
    Replies: 17
    Last Post: 01-27-2007, 09:28 AM
  5. MAF VS Speed Density Tune!
    By phoenix1987 in forum Computer & Tuning
    Replies: 1
    Last Post: 01-24-2007, 07:20 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •