Subject	Question for you then...
Posted by	TTFairladyZ on August 23, 2007 at 12:14 PM
	This message has been viewed 289 times.
In Reply To	gear change won't make any difference on the dyno (n/m) posted by aliaZ on August 23, 2007 at 08:00 AM
Message	I ran my car on the dyno a few months back and I was able do the pulls myself. First 3 runs were all done in 4th gear (1:1 ratio) and I made 357whp, 355whp, and 355whp. For the 4th pull, I decided to put it in 3rd gear for the hell of it to see what it would make. It made 347whp and the power came on alot quicker and shorter obviously. So since the appropriate gear to dyno our cars is 4th, which is to get a good determination of the powerband, wouldnt leader gears put the car at a higher rpm range starting off, not allowing the full potential of the stock TT gearing to show the full powerband? Hope that makes any sense.
Follow Ups	ok on those 4:10 richmond gears ...I never saw a dyno with / - Andrew(nj) 05:34:53 08/23/07 I gained 6-7 MPH On my trap speeds with the 4.10s. (n/m) - Eishozzzz 05:43:16 08/23/07 gear change won't make any difference on the dyno (n/m) - aliaZ 08:00:36 08/23/07 Gears are a torque multiplier. (n/m) - Octavian 08:07:39 08/23/07 but you would still run the dyno in your 1:1 gear (n/m) - Atl300zxTT 08:12:16 08/23/07 1:1 at the trans, the final gear ratio is still different. (n/m) - spyhunterTT(nj) 10:03:51 08/23/07 thanks for the clarification (n/m) - Atl300zxTT 10:30:16 08/23/07 indeed - aliaZ 08:58:27 08/23/07 Re: indeed - GPA 10:00:45 08/23/07 For a fixed driveshaft rpm, the rpm of the axles goes down - 300zx90 (CO) 10:22:16 08/23/07 Horsepower is a derivative of torque, so - Octavian 10:02:31 08/23/07 This is getting deep..... - GPA 10:06:30 08/23/07 LOL, you are not making 50hp with the gears. You are - Inzane 10:07:52 08/23/07 LOL, I know, but its odd that the mph go up because - Octavian 10:19:15 08/23/07 Good point. However it could be that w/ the gears you spend - Inzane 10:30:23 08/23/07 Basically, I believe the Leader Gears make more efficient - GPA 10:33:20 08/23/07 yep (n/m) - aliaZ 10:43:49 08/23/07 Less time to accel, but your accel-ing at a higher rate. - John B. (NJ) 10:36:30 08/23/07 Elapsed Time (n/m) - EricTTZ 11:14:45 08/23/07 Horsepower is not a derivative of torque - 300zx90 (CO) 10:12:55 08/23/07 So i can get 500rwhp+ from a lawnmower with the right gears? - CaliguyPurdue (redesigning) 10:55:03 08/23/07 anything is possible with sufficient NAWS (n/m) - Guapo 11:02:36 08/23/07 i got nipples jimmy, can you milk me? (n/m) - ForceFedZ32 (SoCal) 11:23:14 08/23/07 LOL! Thanks for the laugh (n/m) - ZEngineer 11:40:45 08/23/07 Bahahahahaha... sick. - CaliguyPurdue (redesigning) 11:51:55 08/23/07 i have... - ForceFedZ32 (SoCal) 12:09:41 08/23/07 Given the right hormones it'd probably be doable ;~) (n/m) - Barry'z (NJ) 12:16:50 08/23/07 I've never enjoyed the thought of mowing a lawn before. - ZJeweler 11:57:12 08/23/07 no. (n/m) - Dallas DamonZ 17:04:28 08/23/07 I think the 1/4 mph increases because - RSR 12:22:34 08/23/07 Yes, that makes sense to me. (n/m) - GPA 19:25:10 08/23/07 Clarify: - RSR 07:56:01 08/24/07 please read up on inertia dynos before posting this stuff (n/m) - ztunerz 12:47:38 08/23/07 Correct info, incorrect explanation - ZCulture 12:39:17 08/23/07 yes, but it depends on the point of reference - aliaZ 14:39:17 08/23/07 Re: Gears are a torque multiplier. - Kenny 09:09:46 08/23/07 werd. (n/m) - CaliguyPurdue (redesigning) 11:17:47 08/23/07 2nd. DHU. (n/m) - Inzane 09:04:01 08/23/07 Question for you then... - TTFairladyZ 12:14:27 08/23/07 Ideally the dyno should register slightly lower - ZCulture 15:02:43 08/23/07 correct - aliaZ 15:18:29 08/23/07 Gears are theoretical torque multiplier - kaosTTZ 11:45:01 08/23/07 Perfect. (n/m) - ZCulture 12:43:14 08/23/07 Just wanted to add... - ZCulture 12:47:25 08/23/07 unless you have cams with 7800 redline. :) (n/m) - Scotts94z32 12:51:19 08/23/07 well I could care less about horsepower numbes - I.Z.U.8.1.B.4 (SC) 13:10:11 08/23/07 Torque gets you to the wall quickly, HP (and weight) move it (n/m) - Scotts94z32 17:01:23 08/23/07
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