Gents, with all due respect, trying to replicate all MAP cells at all RPM bands on the road is very time consuming, inefficient and requires riding the brake to get cells populated. I certainly don't believe GM and Mercruiser tuned our engines by driving them around with a laptop and tuning software. (If they did, I stand corrected) I would expect they did it on an engine Dyno. The hub Dynos are effectively the same setup, but rather than bolting straight into the flywheel, they both up to the axles. So, yes, there is drivetrain loss, but you have full control of the loads and RPM presented to the engine. Having driven around for hours and hours, riding the brake trying to get decent counts in all VE table cells for my LS engines and now with my LT-5, doing it on an engine Dyno or Hub Dyno is far better and indeed safer, in my humble opinion.
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11-26-2017
Re: A good day at the dyno...
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