Help with gear selection
02-01-2016, 02:59 PM
#1
Help with gear selection So have been doing some reading and have came to a bump in the road. I plan on purchasing a S60. Things to consider is that the tracks around the STL area are mostly 8th mile. Gateway is the only 1/4 track around and also the closest.
I have been using online calculators to figure out what gear to go with. The calculator pretty much told me I need between a 3:99-4:01 gear to trap 130mph-140mph on a 28" tire. I think thats kinda high! Especially with a Th400 first gear being 2:48 IIRC.
Most people I ask, tell me 3:54s will be fine. But by doing the math, it seems that the 3:54s are out of the question.
The specs are in the sig. I am leaning towards 3:73s but I think anything over 4:00 is too high. Car will be a 75% track car and a 25% street car. Im just lost on what to choose between the 3 options 3:54, 3:73 and 4:10.
I have been using online calculators to figure out what gear to go with. The calculator pretty much told me I need between a 3:99-4:01 gear to trap 130mph-140mph on a 28" tire. I think thats kinda high! Especially with a Th400 first gear being 2:48 IIRC.
Most people I ask, tell me 3:54s will be fine. But by doing the math, it seems that the 3:54s are out of the question.
The specs are in the sig. I am leaning towards 3:73s but I think anything over 4:00 is too high. Car will be a 75% track car and a 25% street car. Im just lost on what to choose between the 3 options 3:54, 3:73 and 4:10.
02-01-2016, 03:12 PM
#2
Staging Lane
3:54s will be fine
I think what they mean is that anything higher will become annoying at high cruising speed, while not reducing your 60 ft. by much.
What do you like for trap RPM?
I had a 3.91 axle in my DD, and the motor buzzed way too much for my taste - but it was still hard to launch without blowing off the tires.
I think what they mean is that anything higher will become annoying at high cruising speed, while not reducing your 60 ft. by much.
What do you like for trap RPM?
I had a 3.91 axle in my DD, and the motor buzzed way too much for my taste - but it was still hard to launch without blowing off the tires.
02-01-2016, 10:24 PM
#5
turbo cars like less gear that is why people are recommending the 354's well that and if its making a lot of power too steep a gear will keep you from being able to see potential on trap speeds. Ride the boost freight train lol.
For example Grand Nationals came with 342's and usually you don't see those guys even the fast ones change gears unless they need way more tire then they will change gear but it equals back out close to the same effective ratio when you figure in the tire rollouts effect on final gearing
For example Grand Nationals came with 342's and usually you don't see those guys even the fast ones change gears unless they need way more tire then they will change gear but it equals back out close to the same effective ratio when you figure in the tire rollouts effect on final gearing
02-02-2016, 07:26 AM
#8
turbo cars like less gear that is why people are recommending the 354's well that and if its making a lot of power too steep a gear will keep you from being able to see potential on trap speeds. Ride the boost freight train lol.
For example Grand Nationals came with 342's and usually you don't see those guys even the fast ones change gears unless they need way more tire then they will change gear but it equals back out close to the same effective ratio when you figure in the tire rollouts effect on final gearing
For example Grand Nationals came with 342's and usually you don't see those guys even the fast ones change gears unless they need way more tire then they will change gear but it equals back out close to the same effective ratio when you figure in the tire rollouts effect on final gearing
Also, I'd like to ET as best as possible. trap speed is great and all, but having a high trap speed but a sucky ET kinda defeats the purpose to me.