finish line rpm vs launch

4spdJohnny · 05-23-2012, 12:27 AM

I am in the process of going from 5.38 to 4.88 gears in a j/sa 70 Sport Sattelite wagon 383 is shifted at 6400 goes thru traps at 7400. Building a trans with a lower first 2.45 to a 2.77. Thoughts keeping the same basic gear multiplication down low and more in power band down track. Does this seem like a move in the right direction or is it normal to "over rev" a stocker that much? It sure seems out of breath last 300 ft. Is that to much of a jump?

05-23-2012, 12:27 AM	#1
4spdJohnny Member Join Date: Aug 2010 Location: Grand Forks ND Posts: 243 Likes: 506 Liked 137 Times in 46 Posts	finish line rpm vs launch I am in the process of going from 5.38 to 4.88 gears in a j/sa 70 Sport Sattelite wagon 383 is shifted at 6400 goes thru traps at 7400. Building a trans with a lower first 2.45 to a 2.77. Thoughts keeping the same basic gear multiplication down low and more in power band down track. Does this seem like a move in the right direction or is it normal to "over rev" a stocker that much? It sure seems out of breath last 300 ft. Is that to much of a jump?