Engine/Drivetrain Vibration Issues
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09-08-2007, 01:26 AM
Post: #12
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What did you change ??
From what you have said, the only things you changed (in the last
rebuild) that could alter or introduce a torsional resonance in the drive train, are (a) the CW&P, and (b) the compression ratio. By changing the diff ratio, you have not only lowered your overall gearing for better acceleration, but you have increased the amount of engine braking available. This will cause a change in gear tooth loading under deceleration. By raising the compression ratio (and I assume the ratio went up) the strength of the cylinder compression impulses will have increased. Resonance problems are difficult to pin down, and the solution is most likely easier to find by trial and error, than by theorising So, if the problem is one of "rattling", it would probably be worthwhile swapping in another back axle assembly, or complete diff head if you have one in the OEM ratio (4.3:1 ?). If the problem is one of "vibration", then swapping back to the heavier flywheel you had before, may be a solution. Cheers... jondee86 PS: I would still like to know if you have fuel cut on overrun The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore, all progress depends on the unreasonable man. |
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Messages In This Thread |
Engine/Drivetrain Vibration Issues - apardal - 09-06-2007, 09:54 PM
Shake, rattle and roll :-| - jondee86 - 09-07-2007, 08:03 AM
[] - dikolotour - 09-07-2007, 12:05 PM
Ghosts in the gearbox... - jondee86 - 09-07-2007, 02:12 PM
First, define the problem.... - jondee86 - 09-08-2007, 12:44 AM
What did you change ?? - jondee86 - 09-08-2007 01:26 AM
Fuel saving... - jondee86 - 09-09-2007, 02:45 AM
[] - Rasteirinho - 09-14-2007, 01:10 AM
Launch control.... - jondee86 - 09-14-2007, 03:12 AM
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