Results 1 to 7 of 7

Thread: Timing Calculator

  1. #1
    Member
    Join Date
    Jun 2011
    Posts
    68

    Default Timing Calculator

    The new timing calculator built in is cool, and with the new description makes sense too.

    What I am wondering is what I should be looking for with this, is there an optimum amount of pulse before or after, or is it totally different truck to truck?

    Thanks!
    06 CC DRW, DTT, EFI Live.

    473HP

  2. #2
    Lifetime Member dansdieselp's Avatar
    Join Date
    Apr 2009
    Posts
    600

    Default

    Typically you want around 50% up top and less down low. The Cummins doesn't like 50 across the board as much as the Duramax does. This also depends on the size of injectors you have and turbo.
    Dan's Diesel Performance
    Specializing in Duramax and Cummins Diesels
    Building and tuning trucks from daily drivers to full out competition

    www.dansdieselperformance.com

  3. #3
    Junior Member chance cobb's Avatar
    Join Date
    Jun 2011
    Posts
    39

    Default

    any one care to explain how this works ?

  4. #4
    Member
    Join Date
    Jun 2011
    Posts
    68

    Default

    Quote Originally Posted by dansdieselp View Post
    Typically you want around 50% up top and less down low. The Cummins doesn't like 50 across the board as much as the Duramax does. This also depends on the size of injectors you have and turbo.
    Ok, so considering that my truck has stock sticks and injectors I should keep it in the 50%range up top and closer to 0 down low?

    Thanks for the information!
    06 CC DRW, DTT, EFI Live.

    473HP

  5. #5
    Lifetime Member FUBAR's Avatar
    Join Date
    Feb 2011
    Posts
    441

    Default

    This is where it'll start to turn a little grey...pretty much it leaves from here to a tuner to tuner opinion. The dyno time, trial and error, and other experience is what gives them their professional intellectual tuning ability and livelihood.

    What I think will be safe to say, is to briefly explain what you're working with and you can use judgement how to tune for it. This being a stock thread, it's assumed we're using stock injectors. That being said, how do we get power out of them? Think of the basic torch concept. If we have a plate of metal, and two torches, one big, one small, and we need to heat the plate up to a certain temp., let's look how we're gonna do this. Using the big torch, it puts out more heat using LESS TIME to heat the plate up, than it would to have to stand there and hold the small torch and try to bring the plate up to the same temp.

    Now of course there are A LOT of other variables that come into play in talking about a engine while tuning timing, but this fundamental theory should help start your thought process.
    06 5.9L, EFILive / Silver Bullet Tuning
    06 LBZ, EFILive

  6. #6
    Lifetime Member FUBAR's Avatar
    Join Date
    Feb 2011
    Posts
    441

    Default

    There's spooling the turbo to think about, fuel mileage, duration, pressure, other injection events, spraying outside of the bowl, etc, etc.
    06 5.9L, EFILive / Silver Bullet Tuning
    06 LBZ, EFILive

  7. #7
    Member
    Join Date
    Feb 2011
    Posts
    82

    Default

    Quote Originally Posted by FUBAR View Post
    There's spooling the turbo to think about, fuel mileage, duration, pressure, other injection events, spraying outside of the bowl, etc, etc.
    ^^^^ Exactly

    The static timing calculator is a good reference but real timing will be affected by many variables like pre-injection(quantity&timing before main shot), fuel temps, air temps, fuel cetane, fuel pressure, etc, etc. Learning how to adjust timing takes some time and understanding of the influences involved.

Similar Threads

  1. need help with SPEEDO CALCULATOR
    By Boost in forum General (Diesel)
    Replies: 9
    Last Post: October 17th, 2007, 12:09 PM
  2. new speedometer calculator
    By minytrker in forum General (Petrol, Gas, Ethanol)
    Replies: 2
    Last Post: April 5th, 2007, 08:58 AM
  3. RPM calculator
    By limited cv8r in forum Gen IV V8 Specific
    Replies: 4
    Last Post: December 24th, 2006, 04:23 PM

Posting Permissions

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