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05 GTO- L92 heads and Cam swap. Pix

This is a discussion on 05 GTO- L92 heads and Cam swap. Pix within the Internal Engine forums, part of the LSx Technical Help Section category; 99.9% tune and .1 percent the busted o2 sensor connector i found today while looking for the leak in my ...

  1. #21
    Slower Than a 3rd Gen juiced99ws6's Avatar
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    Mystic Teal
    99 Trans Am & 01 CBR 929

    99.9% tune and .1 percent the busted o2 sensor connector i found today while looking for the leak in my power steering pump kinda makes sense too because with no response at all from that o2 sensor the car wont know how much fuel to feed that bank even if my stock tuning can compensate for the cam. I hope you are right about the tune though man, i worry alot since I did all this work. The GTO runs just fine on the stock tune although its hard to start and dies on the rare occasion so that just makes matters worse in my head. but I also have a 230-236 cam and he has a 224-228 cam

  2. #22
    Junior Member edcmat-l1's Avatar
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    Invest in an infrared temp gun. Point and shoot. You'll wonder how you ever lived without it. They're great for find dead or weak cylinders. Shoot the headers and you'll know. Quickly narrow it down to the exact cylinder or cylinders. Also great for diagnosing brake problems.

  3. #23
    Slower Than a 3rd Gen juiced99ws6's Avatar
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    Mystic Teal
    99 Trans Am & 01 CBR 929

    how much will that run me though? does it just give me a temp on every cylinder or how does that work

  4. #24
    Junior Member edcmat-l1's Avatar
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    Quote Originally Posted by juiced99ws6 View Post
    how much will that run me though? does it just give me a temp on every cylinder or how does that work
    Temp guns can be had for as little as 80 or 90 bucks. Mine is a little more exp, but it was still under 200.
    I've owned one since the very early 90s when they were crazy expensive. I've went thru 3 or 4 of them by now.
    Yes, you can shoot each header tube, and see the temp difference between them. They ( temp guns) are a great diagnostic tool. I've found cold spots in radiators from blocked up tubes, brakes that were draggin slightly, AC condensers that didnt have the right temp drop across them, and all kinds of other little things.

  5. #25
    Slower Than a 3rd Gen juiced99ws6's Avatar
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    Mystic Teal
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    that definatly makes alot of sense. thank you for the advise man, I may have to go get one.

  6. #26
    Junior Member edcmat-l1's Avatar
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    Quote Originally Posted by juiced99ws6 View Post
    that definatly makes alot of sense. thank you for the advise man, I may have to go get one.
    You will wonder how you ever lived without one. LOL

  7. #27
    Slower Than a 3rd Gen juiced99ws6's Avatar
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    Mystic Teal
    99 Trans Am & 01 CBR 929

    I just figured I would post this from the article Ed posted from GM High Performance.

    L92 vs LS1 and LS2 Heads - Sick Flow, Less Dough- Tech


    SLP L92HEADS ----AFR/SLP225CC HEADS
    Valves: 2.16/1.59 ----2.08/1.60
    CombustionChamber: 64cc ----65cc
    Intake/ExhaustRunners: 260/90cc ----225/85cc
    Intake/ExhaustRunner Shape: Rectangular/D-shaped ----Cathedral/Round
    Advertised Flowat .600-inch lift: 330/202cfm ----320/250cfm


    FLOW COMPARISONLIFT SLP L92 DECKED HEAD ----SLP AFR HEAD
    .100 74.2/57 cfm ----68/59.1 cfm
    .200 154.1/113.9 cfm ----146.5/116.4 cfm
    .300 208.2/150.7 cfm ----210.2/168.6 cfm
    .400 244.4/171.5 cfm ----254.4/202.6 cfm
    .500 270.7/185.9 cfm ----283.8/216.6 cfm
    .600 287.9/191.5 cfm ----265.8/223.4 cfm


    REAR-WHEEL HORSEPOWER
    AND TORQUE COMPARISON*RPM L92 Heads/L76 Intake --AFR Heads/LSX Intake
    3,000 248.1 hp, 423.7 lb-ft ---- 243.9 hp, 415.4 lb-ft
    3,250 272.6 hp, 438.3 lb-ft ---- 267.0 hp, 434.4 lb-ft
    3,500 304.1 hp, 444.7 lb-ft ----311.5 hp, 455.4 lb-ft
    3,750 316.2 hp, 446.0 lb-ft ---- 326.8 hp, 458.9 lb-ft
    4,000 358.4 hp, 462.9 lb-ft ----358.2 hp, 465.4 lb-ft
    4,250 383.8 hp, 471.6 lb-ft ----385.8 hp, 474.0 lb-ft
    4,500 410.8 hp, 473.9 lb-ft ----416.2 hp, 478.0 lb-ft
    4,750 432.1 hp, 476.5 lb-ft ----427.9 hp, 476.0 lb-ft
    5,000 451.9 hp, 477.2 lb-ft ----449.3 hp, 471.1 lb-ft
    5,250 473.5 hp, 473.8 lb-ft ----462.8 hp, 465.7 lb-ft
    5,500 483.7 hp, 460.7 lb-ft ----471.6 hp, 451.4 lb-ft
    5,750 493.5 hp, 449.5 lb-ft ----481.3 hp, 440.5 lb-ft
    6,000 496.8 hp, 434.4 lb-ft ----488.3 hp, 428.7 lb-ft
    6,250 488.3 hp, 409.3 lb-ft ----484.7 hp, 406.2 lb-ft

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