Results 1 to 7 of 7

Need tune for ORY?

This is a discussion on Need tune for ORY? within the General Help forums, part of the LSx Technical Help Section category; I recently put a ORY on my car. DO I need to tune the car so that it does not ...

  1. #1
    Junior Member
    Join Date
    Apr 2009
    Location
    Sanford, NC
    Posts
    41

    Red
    2000 Pontiac Firehawk

    Need tune for ORY?

    I recently put a ORY on my car. DO I need to tune the car so that it does not run as rich or will it be fine for my motor without a tune for a while?

  2. #2
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,567

    Black & Blue
    '02 WS.6 / '07 Suburban

    Any mod that enhances airflow through the engine has an affect on fueling. The upstream O2 senders and MAF are able to compensate for these differences, however, your volumetric efficiency (VE) table will not be as accurate as with the stock exhaust.

    If you have access to a scanner you can see your long and short term fuel trims. These should hover close to zero which means that your PCM is not adding or subtracting fuel to or from the engine. Anything greater or less than than a steady + or -5 to 8 on the trims is probably indicative of the need to recalibrate the VE table.

    Someone with more tuning experience can most likely provide a better response.

  3. #3
    O U 8 1 2 Spaz's Avatar
    Join Date
    Nov 1999
    Location
    over here...
    Age
    39
    Posts
    25,693

    []D [] []V[] []D
    1999 trans am

    yes... unless you've already had the rear 02's tuned off you'll need that done...

  4. #4
    Electrical Engineer KMdef9's Avatar
    Join Date
    Jul 2009
    Location
    North of the Motorcity
    Posts
    2,611

    Custom Swirly Black
    2001 WS6 M6

    Quote Originally Posted by pajeff02 View Post
    Any mod that enhances airflow through the engine has an affect on fueling. The upstream O2 senders and MAF are able to compensate for these differences, however, your volumetric efficiency (VE) table will not be as accurate as with the stock exhaust.

    If you have access to a scanner you can see your long and short term fuel trims. These should hover close to zero which means that your PCM is not adding or subtracting fuel to or from the engine. Anything greater or less than than a steady + or -5 to 8 on the trims is probably indicative of the need to recalibrate the VE table.

    Someone with more tuning experience can most likely provide a better response.
    Pretty sure you hit the nail on the head, lol.

  5. #5
    None Shall Pass Knight's Avatar
    Join Date
    Jan 2010
    Location
    East of Cleveland, Ohio
    Posts
    3,828

    Black
    99 WS.6 - Modified

    How long is a while? I know quite a few people who have installed LTs and an ORY, and haven't had their car tuned. No problems except the pesky SES light. To take full advantage, and make the engine run the most efficient, you would benefit from a tune. But if you plan to do some other mods anytime soon, I'd wait to get the tune until after you do them.

  6. #6
    Electrical Engineer KMdef9's Avatar
    Join Date
    Jul 2009
    Location
    North of the Motorcity
    Posts
    2,611

    Custom Swirly Black
    2001 WS6 M6

    Forgot to mention, site sponsor and member 'Frost' does mail order bench tuning for mods like LT's, ORY and a long list of others. Check out his site.

    http://www.tunedbyfrost.com/

  7. #7
    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 Knight View Post
    How long is a while? I know quite a few people who have installed LTs and an ORY, and haven't had their car tuned. No problems except the pesky SES light. To take full advantage, and make the engine run the most efficient, you would benefit from a tune. But if you plan to do some other mods anytime soon, I'd wait to get the tune until after you do them.
    Sounds like solid advice, but it does suck to always have the SES on. When it's on for something like this and there is a real problem, you may not know about it since the light is already on.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Custom tune, HP tuners, or PCMFORLESS TUNE
    By cancam99ss in forum Computer & Tuning
    Replies: 19
    Last Post: 09-29-2012, 10:09 PM
  2. Question: Frost tune or Dyno tune?
    By 90ARAPAJ in forum Firebird / WS6
    Replies: 10
    Last Post: 04-15-2012, 01:38 PM
  3. hypertech tune erase my dyno tune?
    By Z28LS1 in forum Computer & Tuning
    Replies: 3
    Last Post: 02-02-2009, 07:31 PM
  4. whats the diff with a full dyno tune and a street tune?
    By Justin23454 in forum Computer & Tuning
    Replies: 6
    Last Post: 12-04-2007, 07:31 AM
  5. Handheld Tune?shop Tune? software running on my laptop tune?on my SS
    By showtimesteele99SS in forum Computer & Tuning
    Replies: 4
    Last Post: 04-09-2007, 06:31 AM

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
  •