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Recent content by Fabrico

  1. Fabrico

    Diesel engine performance testing question

    gruntguru You might try digesting what the OP said in his original post. "We then drop the engine to 1900rpm, no load, increase the load, and we find we can only reach about, say, 325 Nm until the engine speed starts to drop off." This points to precisely what I outlined.
  2. Fabrico

    Diesel engine performance testing question

    Assuming you are lowering the no load speed to 1900 by backing off on the throttle, you have not stated what you do with the throttle as you apply more load. I'm not highly familiar with that particular pump, but some will not reach full fuel on part throttle. I believe catserveng is spot-on in...
  3. Fabrico

    What exactly causes shock fade?

    You might take a look from the other side, where these concerns have been thoroughly addressed. For heavy use, nothing compares to a remote reservoir. These are used around the world for just what you are doing, Dakar, Baja, and a whole lot more. http://www.kingshocks.com/...
  4. Fabrico

    Truck trailer axle loads permitted

    Try looking at this: http://www.dot.ca.gov/hq/traffops/trucks/trucksize/weight.htm
  5. Fabrico

    Hypoid gear direction of rotation?

    If you need something robust, you might look into flipping one of the many Dana high-pinion front 4WD axles. When placed at the rear, the pinion will be toward the bottom and turning the wheels the right direction. The gears and bearings will be fine, but the axle housing will likely need to be...
  6. Fabrico

    Hydraulic Fittings

    Just wondering if anyone has heard of or experienced separation issues with any of the new push-to-connect hydraulic fittings? Also wondering how to approach something like this if it were to happen more than one or two times with the same type but different sizes and pressures. Being in a...
  7. Fabrico

    Selecting correct tube grade - live rear axle housing

    Good points all, but round tube axles for severe off-road use nearly always have additional support structure added.
  8. Fabrico

    Reducing Turbocharger Turbine/Internal Mass?

    We had a large purchase of large vehicles with Brand X Diesels in them. The OEM turbo blades were ceramic, and very responsive. In this case the desired response was less puff, not more pull, but the requirement is the same. Two problems came with the improvement. One was very definite...
  9. Fabrico

    (ask) Dry Ice for cooling air intake temperature

    Why shoot a fire extinguisher into your intake? I think I would try regular ice before dry ice.
  10. Fabrico

    Engine exhaust gas pressure

    We measure this constantly on all of our on-road Diesels that have exhaust particulate traps. There is a high temp 1/4" ID braided line about 30" long that runs from the exhaust pipe to a small, chassis mounted pressure switch manifold.
  11. Fabrico

    Propshaft strength ?

    A torque converter can multiply torque up to 2.5 times. The actual amount is dependant on many variables but you can count on a minimum of 2x. Whatever shock a torque converter can absorb under normal conditions will be nullified by being in a high-stall situation and using a trans-brake...
  12. Fabrico

    Exhaust design theory discusion.

    A majority of high performance single cylinder motorcycle engines have separate ports and separate head pipes. These often converge into a single pipe about midway between the cylinder head and muffler.
  13. Fabrico

    How would you take the flex from a hollow cam?

    Assuming the deflection is always the same direction, you could insert a solid or hollow bar that is fastened on its first end relaxed and its second end with preload. If well thought out, it could be simple, cheap, and failsafe.
  14. Fabrico

    new guy needing suspension help

    The spacing and lateral location of the balls on the new uprights, as viewed from front or rear, will have to be a close match to the Mustang II'S. Otherwise you will have problems getting the wheels statically aligned, keeping them dynamically aligned, and keeping axle plunge under control...
  15. Fabrico

    Pinion Mass Dampener

    Nor did they fail in the front engine/rear transmission Pontiac Tempests, a few Ferrari models, and the latest few years of powerful Corvettes.
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