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  1. Jefnes

    injector consistancy and calibration

    'calibration' charge from the VW dealer...mmmm I tune VW M2.9 and M5.9 Motronic 'powered' cars. and there is no real calibration that the dealer can do (tuning wise anyway). The newer ME Motronic ecus, with the non-cable throttle, are even better (more ecu power). These ecu's keep the engine...
  2. Jefnes

    Combustion chamber analysis after teardown

    I thought this a well, 'normal' engine wear. yes all the, wear, and clean spots are all near each other: intake valve side of chamber, just below intake valves. Imagine spraying 'cleaner' from the intake valves towards the cyl wall, this is the pattern. (lends creedence to fuel washdown) I am...
  3. Jefnes

    Combustion chamber analysis after teardown

    I'm not exctly sure off hand...if the injector points directly at that spot. Typical port injection where the injector is in the intake manifold runner, 1 per cylinder. BTW this is on a Honda B-series engine. The clean spot doesn't bother so much as the scuffing of the cylinder wall. There...
  4. Jefnes

    Combustion chamber analysis after teardown

    Background: High specific output 4 cyl engine, 1.6L disp, making ~340whp on 18 psi of turbocharged boost. My specific question relates to combustion and detonation. I tore down my current engine due to an oil pump failure and took the opportunity to examine the pistons and the combustion...

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