Quote:
Originally Posted by 97 SL320
Did he give reasons for that? While smoke does not = power, I'd be more inclined to reduce fuel levels to trim smoke.
I'd also be inclined to record rack position during an on the road run to determine if the rack is pulling back. Not sure if your pump has this but some industrial diesels use a torque limiter to pull the rack back in addition to the standard RPM limit.
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First - good explanation on the dyno stuff. I did dyno setups and testing for a living and know WAY more about this stuff than I need to. I've learned to try to keep my explanations simple as folks eyes glaze over if I start telling the gory details. You might find my article on dynamometry (January 2000 issue of Hot Rod Magazine) interesting.
One of my options could be to roll back the pump output which on the SuperPump IS possible. But my goal is max HP/max MPH so I really don't have much incentive to do that. It runs SO happily at 20-21 PSI so why not give it what it likes?
This pump does not pull the rack back under power. You're thinking of a torque-limited Diesel like the older Cummins engines. Cats were always speed limited and had a huge advantage for over the road truckers as they would try to hold engine speed regardless of hills, etc. so they almost had cruise control back before that was common. Anyhow, this engine and the Bosch pumps on them were built for automotive use and that use really doesn't lend itself to either speed or torque limiting. This should not be confused with governor settings which are there to protect the engine. With the SuperPump that's set to about 5200 RPM, +/-.
Dan