Been out of the loop and out of town for some time...
Quote:
Originally Posted by pbonsalb
When you plug your numbers into your simulator for the pulley, do they reflect that the UD pulley adds nothing at idle, maybe 5 of its 10 rwhp at 4200 rpm, and the full 10 rwhp not until 8400 rpm?
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Yes this is reflected, although it is largely irrelevant. When doing any WOT runs (which nearly all simulations of this type are) you are almost always in the 6000-8400 rpm range. Thus the data for what the engine is doing below that range is not relevant. Now of course if you choose the wrong gear, drive lazy and nearly lug the engine trying a 60-130 in 6th gear this fact will not be quite so true.
Quote:
Originally Posted by pbonsalb
When you do it for the 4.10 diff, does it reflect that the diff multiplies torque 5% better at every rpm?
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The differential gearing is treated exactly, regardless of the engine rpm, torque curve or the ratio used. You might consider brushing up on the fundamentals of vehicle performance and acceleration with some actual equations. They are quite insightful as to how and why these simulations actually work.
Quote:
Originally Posted by pbonsalb
the 4.10 diff blows away the underdrive pulley in your daily driving simulations for 30-50, 50-70 and 60-130 mph runs in any gear other than the absolutely perfect gear and perfect rpm (which we know you are always in, at least on your computer).
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Well "blows away" is certainly subjective, it may offer a small advantage that increases as the driver adopts a lazier and lazier approach to trying to actually have some or the best performance. Again, if you think the lazy driving numbers and benefit of this mod is justified on a performance/dollar ratio that is up to you. Anyone rational will disagree.
Again M-DCT... Argument pretty much over. It adds the equivalent of 20-50 hp depending on the contest and makes rectification of being in the wrong gear trivial. It also costs less than new FD gearing.