Results 1 to 3 of 3

Thread: Tune VE and MAF tables or leave VE stock and tune MAF only

  1. #1
    Lifetime Member
    Join Date
    Jan 2007
    Posts
    243

    Default Tune VE and MAF tables or leave VE stock and tune MAF only

    I was wondering what most of you NA guys do... Do you tune both the VE table and MAF table or leave the VE table stock and tune the MAF solely.... Would there be any difference between the two methods?

  2. #2
    Lifetime Member
    Join Date
    Mar 2005
    Posts
    355

    Default

    Do both, with the VE corrected you get much better transient response. The Maf needs a lot of work over 7000hz, runs rich. Under 6000hz you can trim it up as well to get best fuel economy. Hope this helps.
    Mike
    "Just a tune > yeah right !!!! "

  3. #3
    Lifetime Member
    Join Date
    Jul 2007
    Posts
    376

    Default

    Quote Originally Posted by BlackGMC View Post
    I was wondering what most of you NA guys do... Do you tune both the VE table and MAF table or leave the VE table stock and tune the MAF solely.... Would there be any difference between the two methods?
    So far, I have only tuned the VE table. One could argue that after you add an aftermarket airbox, its skews the maf readings anyway, so tweak the MAF too is probably the best answer.

    Sequentially tune:
    OL SD VE
    CL SD VE WOT
    CL MAF

    At this point, I'm trying to clean up the VE table as much as possible before proceeding to other tuning. I did play around w/PE vs RPM, but plan to retune the MAF to = PE vs RPM A/F data after 4000rpm. I tried OLSD, but its only good for idle, the CL MAF setup beats its big time on top end.

    One problem I might expect by tuning MAF onlyis that at a given Hz airflow,
    you could be at numerous points of the VE table, thus resulting in different A/Fs at each if the VE table isn't spot on, so I'm guessing that tuning the 1 dimensional MAF curve won't cure the entire VE table.

    At less than 4000rpm, I would think its VE table only, then after 4000, the MAF. I would shoot for the PE vs RPM A/F settings for dialing in the MAF. I don't think its a bad idea to dial in the high KPA VE data (95kpa+) first to get close to your desired PE vs RPM, then tune MAF to balance.

    I think the big diff is the drivability would be reduced without working a little
    on the ve table. Most WOT A/Fs are easily cured w/PE vs RPM otherwise.
    07 Silverado DMax Classic
    02 Z06 LS3 416, 805rwhp, TFS245, Wiseco, Callies Crank/Rods, Iskendarian Lifters, Crower Rockers, FAST102/90, ATI Damper, 1-7/8 Kook's LT, QkTime Shield,Tolle-Fab 8pt
    Old Engine: 1/4mile = 9.6/146 New Engine:?

    EFI Live Tune/Scan v7.5.27, EFI Live Scan and Tune v8.2.23, build 276, BootBlock 2.07.06, FirmWare 2.07.52, 512K RoadRunner (12.14.R), Innovate Serial LC2x2


    COS5/12212156 For 2002 Z06 Manual Vette

Similar Threads

  1. Replies: 16
    Last Post: June 1st, 2010, 07:05 PM
  2. LS6 Pro Charger Tune Timing Tables Needed
    By bad boyz racing in forum Forced Induction and Nitrous Oxide (N20)
    Replies: 3
    Last Post: May 8th, 2009, 09:35 PM
  3. How to tune VE tables on a '98 ???
    By Thedude in forum General (Petrol, Gas, Ethanol)
    Replies: 18
    Last Post: January 27th, 2006, 04:25 AM
  4. spark tables SD tune
    By ZL1Killa in forum General (Petrol, Gas, Ethanol)
    Replies: 5
    Last Post: January 3rd, 2006, 02:19 AM
  5. MAFless tune: How do I enable both the Hi-Lo Spark tables?
    By SSbaby in forum General (Petrol, Gas, Ethanol)
    Replies: 2
    Last Post: February 23rd, 2005, 01:50 AM

Posting Permissions

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