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LT1 cam guys...inside

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  • #1

    LT1 cam guys...inside

    "Cam is setup for short dowel pin Optispark."
    "Cam comes with no fuel pump lobe."
    can someone explain these 2 centences
    looking for LT1 cam.
    eddie
    1995 Z28 A4, SCC Ultra Z Hood with Air box/K&N filter, Granatelli Maf Sensor/Fernco bellow/Hotchkis STB/white face gauges/LT4 Knock module/March pullies/160* stat without Hypertech Tunning/Borla 3" y-pipe/HI Flo 3" cat/SLP Loudmouth/GM Motive 3.73's + TA rear end girdle/Afs ZR1's silver painted with polished lip 17x9.5 front & 17x11 out back/98 tail light's/BMR SFC's/spohn Lca's/spohn relo brackets & spohn adj. panhard rod " coated mid lenght pacesetters headers + 1.6rr + custom pc tuning going on soon hopefully "
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  • #2
    The 95-97 vented Opti is driven by the cam dowel pin. The pin needs to be about 0.62" long. If it is longer than 0.68", it can damage the Opti by putting pressure on the drive mechanism/bearing. 93-94 unvented Optis can use a shorter dowel, because it does not drive the Opti.

    Old style Gen 1 engines used a mechanical fuel pump, bolted to the side of the engine, and driven off a lobe on the camshaft. Modern, electric fuel pump engines do not need a fuel pump lobe on the cam, hence an LT1 doesn't need one, and an LT1 cam can not by used in an older engine that needs a fuel pump lobe.
    Fred

    381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

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    • #3
      wow !!!
      the knowledge here is sweeeeet!!!
      thanks injuneer for making it clear on a newbie...
      eddie
      1995 Z28 A4, SCC Ultra Z Hood with Air box/K&N filter, Granatelli Maf Sensor/Fernco bellow/Hotchkis STB/white face gauges/LT4 Knock module/March pullies/160* stat without Hypertech Tunning/Borla 3" y-pipe/HI Flo 3" cat/SLP Loudmouth/GM Motive 3.73's + TA rear end girdle/Afs ZR1's silver painted with polished lip 17x9.5 front & 17x11 out back/98 tail light's/BMR SFC's/spohn Lca's/spohn relo brackets & spohn adj. panhard rod " coated mid lenght pacesetters headers + 1.6rr + custom pc tuning going on soon hopefully "

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