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Thread: C950 Engine parameters question

  1. #1
    Nobody. Guest

    Default C950 Engine parameters question

    I'm going to control my GM TPI with a C950. Under Engine Parameters, which Port Injection should I select... 1 PW per 1 rev or 1 PW per 2 revs? Thanks.

  2. #2
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    Select "Port Inj. (1 PW per 1 rev.)"

    "Port Inj. (1 PW per 2 rev.)" doubles the pulse width so large injectors can idle well.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #3
    Nobody. Guest

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    When you say 'large injectors'... I have 83#. Still 1 PW per 1 Rev? Thanks.

  4. #4
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    Quote Originally Posted by Nobody. View Post
    When you say 'large injectors'... I have 83#. Still 1 PW per 1 Rev? Thanks.
    OK, those are large injectors...but you may still use "Port Inj. (1 PW per 1 rev.)", depending on the Target Air/Fuel Ratio.
    At hot idle, look at the injector pulse width (Inj PW) on the Data Monitor (Fuel or Spark Map).
    If it's 1.7 ms or less, the injectors probably won't idle well and therefore, you should try "Port Inj. (1 PW per 2 rev.)".
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

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