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Thread: Can't Hear Stage 3 Cam

  1. #1

    Unhappy Can't Hear Stage 3 Cam

    What do I have to change in my tune to be able to hear the cam chopping? Do I need to advance the timing or retard the timing at idle?

  2. #2
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    Retard the idle timing.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, 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

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    How low do you usually go? Default is like 15° I have it at like 13° with idle speed at 750 RPM.

  4. #4
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    Well, I don't tune idle timing to make a camshaft sound more aggressive. I personally wouldn't go any lower than 15°.
    http://forums.holley.com/showthread....e-Tuning-Notes (EFI Idle Tuning Notes)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, 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.

  5. #5
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    Quote Originally Posted by Boosted86 View Post
    How low do you usually go? Default is like 15° I have it at like 13° with idle speed at 750 RPM.
    What is your camshaft and engine size? If your idle is still too "smooth" at 13° & 750, then the cam is not big enough for your liking. Gary
    Regards, Gary

  6. #6

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    The engine is .030" over LQ4 243 heads cam is 231°/234° 115° LSA, .600" lift. It's Stage 3 turbo cam, it just sounds really mild.

  7. #7
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    Yes, a 231° duration @ .050" & 115° LSA is a mild camshaft.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, 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.

  8. #8
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    Quote Originally Posted by Boosted86 View Post
    The engine is .030" over LQ4 243 heads cam is 231°/234° 115° LSA, .600" lift. It's Stage 3 turbo cam, it just sounds really mild.
    It sounds mild because it's a Turbo cam, 231° with 115° LSA is mild in the camshaft world. The .600" valve lift with decent heads & boost is your power maker.
    Regards, Gary

  9. #9

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    This. What most people fail to understand is there are more to cam specs than just the @.050 stats. Overlap has a lot to do with idle quality and typically turbo cams don't have much. You can have two cams with the similar or the same .050 stats and both cams are going to sound/perform differently. OP: You can mess with the Idle Spark PID to have it throw the timing around more to make is "chop" more.

  10. #10

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    Sigh...do you want it fast or do you want it to sound like it might be fast? LOL! It probably won't do anything terrible if you lower the idle timing to 10°. Stock idle timing is in that area. Andrew

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