Originally Posted by engifineer

You do realize that measuring hp with varying rotating inertias on an inertial dyno (or anything other than steady state measurements on any system) is going to give you incorrect gain numbers dont you? That is the whole point made if you look at the physics behind them. If you slap lighter wheels and tires on a car between non-steady state, or inertial dyno pulls you will also erroneously read and increase in whp. The same goes for wheels, or any rotating objects. Observing all laws of rotational motion, a heavier wheel is no harder to keep spinning than a lighter one. Actually ,the heavier wheel becomes an advantage the minute you reach a steady state. The only effect at all is in accelleration (both positive and negative) of the wheel itself. It takes more energry to accellerate, but also takes less to keep it spinning. So although acceleration of the crank is made easier, it carries less momentum.

If someone can come out and dispell the laws of motion that we use everyday to calculate everything from automotive physics to the motions of the planets, then I will be all ears. And if one person can take a good number of 1/4 mile runs with a stock pulley, swap to a lighter one and take a good number more and show me a significantly (respectively) lower time, I may look closer. Will reducing mass help? Sure, since you are making acceleration of the engine easier, but I can bet that you will find that the real performance increase you measure on the track (especially with such a small change in rotational mass on a small diameter object) will not add up to a 15whp or so gain.

Anyway, as usual we are all beating this to death, and the people that believe anything a shop with a dyno and a part to sell will believe that, the people that want to believe one way or the other will believe the same and those of us that are a little more skeptical after seeing mod after mod produce little or none of what is promised (not suprisingly when the physics says it wont) will believe what we do. So I guess we can at least agree on that point and go to bed now.... :D

Originally Posted by BadDudeTC3

Competed in a Drag Racing event this weekend and my first two passes were against a manual tC that was fairly similar to my set up and I was able to take the win light both times and I'm auto. I have the OBX crank, water pump, alternator pulley's and I'm sure that played a factor in why I was able to pull away from him from start to finish. If you don't believe me I have the time slips to prove it. Definitely liking the quicker acceleration response with the pulley's....There's a noticeable difference that my auto tC is shifting a lot quicker than before and really pulls strong on the big end of the track.

Originally Posted by rhythmnsmoke

Good job man. However, just keep in mind that it doesn't equate to you being faster than a manual tC. There's no telling what the skill level of the other guy was. Why didn't you already post time slips if you had them...lol. We like show and tell.

Originally Posted by BadDudeTC3

Lol, I wasn't saying that because I had pulley's it makes me faster than a manual tC, I'm just saying that those pulley's helped. Saying I'm faster than a Manual tC just because I have pulley's is just plain silly. Lol, and I always have proof to back up what I say, check out my thread (Woodard Racing N/A build) time slips are posted! I'm not one of these guys that lie about what their car performs. Time slip 1 and 2 are against the manual tC and I even make note that the first was #'s are so different because the guy missed 2nd. Before you say something about that this dude was no rookie! His second car he was racing was a twin turbo supra running 10's so I think he knows what he's doing.