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Thread: 2.5L LM fuel/spark questions!

  1. #1
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    2.5L LM fuel/spark questions!

    I need to make up a stock 2.5 Cal for a customers 87 Shelby. LM is socketed, so is Rob's turbonator close to stock or do I need to adjust the fuel and spark curves. This is BONE STOCK except for a blow thru conversion, NO IC.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  2. #2
    turbo addict
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    Re: 2.5L LM fuel/spark questions!

    In the 12.5V LM cal, there is a 2.5L file, use it. Then copy 89 2.5L's AdvanceFromRPM2 to it. You should be good to go.

  3. #3
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: 2.5L LM fuel/spark questions!

    Thanks. Forgot to mention, its an auto.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  4. #4
    turbo addict
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    Re: 2.5L LM fuel/spark questions!

    Quote Originally Posted by turbovanman View Post
    I need to make up a stock 2.5 Cal for a customers 87 Shelby. LM is socketed, so is Rob's turbonator close to stock or do I need to adjust the fuel and spark curves. This is BONE STOCK except for a blow thru conversion, NO IC.
    burn it to a chip and find out. when it knocks like crazy and you dont understand why come back and post up results

    ---------- Post added at 02:06 PM ---------- Previous post was at 02:02 PM ----------

    oh and the cold idle is too rich that it almost dies too. i wouldnt call that minor tweeking.

  5. #5
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    Re: 2.5L LM fuel/spark questions!

    Quote Originally Posted by roachjuice View Post
    burn it to a chip and find out. when it knocks like crazy and you dont understand why come back and post up results

    ---------- Post added at 02:06 PM ---------- Previous post was at 02:02 PM ----------

    oh and the cold idle is too rich that it almost dies too. i wouldnt call that minor tweeking.
    I'll let you know how it runs,

    Didn't Rob fix that?
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  6. #6
    turbo addict
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    Re: 2.5L LM fuel/spark questions!

    no. mine still ran rich at idle.

  7. #7
    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: 2.5L LM fuel/spark questions!

    Need to know what head is on it Simon, you know this. I didn't think any log engines came with a swirl head though.
    Rob M.
    '89 Turbo GTC

    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

  8. #8
    turbo addict
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    86-87. Yep. Swirl head.

  9. #9
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
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    Re: 2.5L LM fuel/spark questions!

    Quote Originally Posted by Force Fed Mopar View Post
    Need to know what head is on it Simon, you know this. I didn't think any log engines came with a swirl head though.
    All 87+ came with swirl, stock, , maybe even 86 but too busy to go look. Have to make one today so I'll post up what happens.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  10. #10
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    Re: 2.5L LM fuel/spark questions!

    Quote Originally Posted by roachjuice View Post
    no. mine still ran rich at idle.
    Mine idles just fine.

    How rich are you idling?

  11. #11
    turbo addict
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    Re: 2.5L LM fuel/spark questions!

    cold idle was like 10.0 lol. warm idle was fine.

  12. #12
    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: 2.5L LM fuel/spark questions!

    Hmm yeah I forgot that I guess lol. Although my 87 carbed Charger has a 287 bathtub...
    Rob M.
    '89 Turbo GTC

    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

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