Dyno'd KJR Performance Lightweight pulley - Page 3 - G35Driver

G35StrongMan · 2005-11-19 19:43:34

So are there gains or are there not . WTF is wrong with saving precious launch time and having a stronger first gear. No one stated there were massive gains once the "mass" was moving along. If nothing else, I can tell that my car launches better as it bogs less thanks to the first gear gains you ascribe to the pulley above. I never said I felt tremendous pull once the car was moving at a good clip now did I??? I don't think there's anything wrong with reducing launch time. However, keep in mind that reducing rotational inertia of the motor actually can hamper a car's launching ability because the lower inertia can make the car more prone to bogging. This is why you'll never see a manual drag car with a lightened flywheel and such. I know for a fact that my UDP did make my 5MT VQ30 far harder to launch effectively. With an auto, this probably isn't so much an issue. When I pull hard on Z's in my 27 HP less (stock), 200 pound heavier car - there's no doubt in my mind that folks like MeChee do nothing but a dis-service to this forum trying desparately to impress us with thier vast knowledge and credibility that doesn't apply here while never having owned the mod. Again I ask: How can a 6, 7, 10 or half pound decrease in weight at the end of the crank not provide gains in a gear???? Maybe I'll do a handy dandy cut and paste of the pyhsics formula that says if you have less mass, acceleration is positively affected for a given amount of force or thrust. Don't lose sight of the trees for the sake of the forest. I don't know what to tell you about the Z's. I know my basically stock G sedan auto is within .1 seconds of the stock auto 350Zs at my track and my trapspeed is actually fractionally higher than their's by about 1mph. I don't think MechEE is trying to wow people over with fancy formulas. Those formulas a legitment for the subject. If reducing a majority of the rotational inertia was the answer to faster acceleration, I think we would be seeing lots of cars with super light accessories, flywheels, and pullies. I don't it's the expense that's the question, it's the driveability. When you reduce the inertia of the motor, you make it far harder to launch and drive smoothly (as stated above) Spread baseless misinformation and suddenly propose to have the answers that aren't there and I'll call it out. Our readers deserve better. IMO, MechEE has done more than an adequate job answering all the questions posted. I just think it's gone over a lot of people's (not saying you) heads because they can't or won't do the math or research.