edcmat-l1

iTrader: (10)

Otherwise bone stock C5, auto. We were doing several mods all at once, and thought we would dyno it before and after the gear change, simply because everyone wonders what different gear ratios do to dyno results. The original gears were 2.73s and we swapped in 3.42s. All runs were done with the converter locked, and we did 3 runs back to back to back, with the engine oil temp stabilized, and the coolant between 190 and 202. There was a bit of KR on the first set of runs, but I didnt want to do any tuning to skew the results. See my other thread for the results of the complete build.

BlackScreaminMachine

iTrader: (17)

mmmmhm I know higher gear ratios take away from power to the tire but it seems from 2k to 2,750 rpm 2.73's make more power and then its dead even till 4,250pm then from 4,250 to 4,750 the 3.42's make more power. THEN for a brief sec @ the peak the 2.73's come back for the win.

Talk about a struggle

allngn_c5

iTrader: (3)

Very interesting.

WKMCD

iTrader: (2)

Very interesting indeed. Thanks Ed.

edcmat-l1

iTrader: (10)

Yep. I know people are always curious about this, so I thought we would take the opportunity to find out. Hopefully we can do it with different ratios. Say 3.42 swap to 3.73s or even higher.

edcmat-l1

iTrader: (10)

The drop at 4250 on run 2 is KR. Otherwise, it would have been a dead heat right to the top.