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Thread: MAF mode for racing and performance

  1. #21
    Advanced Tuner NJ_Phil's Avatar
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    Running a Novi 1500SL, 10% OD with an ECS Big blower cam, restrictor is in for now. I'll shoot you an email with a map from Bluecat that had similar mods.

  2. #22
    Tuner dreksnot's Avatar
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    Quote Originally Posted by realcanuk View Post
    To follow up on this, I have tuned my VE and played with running it blended. I meant to get that finished this summer but my car has been running so well I haven't even bothered playing with it at all. First summer that I really just drove the car without playing constantly with the tune and it was a pleasure.

    The last attempts I did make, I got it running perfect in maf only, and in SD only, but when blended it never ran quite as well. Maybe next spring I will put in the time and perfect it.
    Similar boat here. I have VE running awesome, but was told to be careful with temperature changes - I presume when the weather changes it could affect my fueling. Runs pretty well in MAF only. But when I switch over to blended it doesn't seem to run as well as either VE or MAF only, which is baffling to me.
    2013 Camaro LSX433 with TFS 245cc cat heads
    AGP 65/65 Twin Turbos into BTR Equalizer intake
    BTR 237/247 .610"/.601" 116+5 (10* overlap) cam
    ID-1700x on AGP Fore Triple w/ Flex Fuel sensor
    Cortex EBC | n2mb WOT box | custom anti-lag

  3. #23
    Senior Tuner mbray01's Avatar
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    Log mass air flow in lb/min, and log dynamic air flow in lbs/min. If they don't match perfect, then that is your issue.
    Very easy to check. There are even some pids out there you can load, that if you have a perfect maf model it will write the ve table for you, and then there is no reason it wont run blended

    i see a lot of guys get fueling within 5% + or -
    however i see this causing issues, especially when using ltft's as 99% of street cars should be using. I always tune to within 5%+, never have any lean spots(not even -1) this tends to alleviate any mismatch when running blended. If you spend the time get it to within 2% the car will be real happy.
    Michael Bray
    Rusty Knuckle Garage
    Slidell, Louisiana
    20yr Master Tech.
    Advanced Level Specialist
    Custom Car Fabrication, Customization, High Performance.
    GM World Class Technician
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  4. #24
    Advanced Tuner NJ_Phil's Avatar
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    Applied the 2 bar patch
    Wrote entire
    Wrote Calibration
    Read Calibration
    Plugged in the SD map to both open and closed runner tables
    Wrote Calibration

    Started up and idled fine

    Thank You

  5. #25
    Tuner dreksnot's Avatar
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    Quote Originally Posted by mbray01 View Post
    Log mass air flow in lb/min, and log dynamic air flow in lbs/min. If they don't match perfect, then that is your issue.
    Well, for the most part it's centered around the zero reference line (with +/-5%); however I do see at times it's steadily above and below at certain rpms/conditions. Not really applying the 'perfect match' to sharp throttle transitions as MAF is very responsive to that and VE has to catch up.
    Last edited by dreksnot; 10-26-2016 at 04:58 PM.
    2013 Camaro LSX433 with TFS 245cc cat heads
    AGP 65/65 Twin Turbos into BTR Equalizer intake
    BTR 237/247 .610"/.601" 116+5 (10* overlap) cam
    ID-1700x on AGP Fore Triple w/ Flex Fuel sensor
    Cortex EBC | n2mb WOT box | custom anti-lag