Stick vs Auto

weedburner · 10-09-2021, 03:29 PM

Stick has the potential advantage of launching at a much higher rpm than an automatic.

Here's one of my ClutchTamer customer's sealed engine Coyote Stock graphs from several years ago, it clearly shows stored inertia energy contributing quite a bit to the car's initial acceleration rate. Energy that was stored prior to the start of the clock, then un-leashed after the start of the clock to boost acceleration. Notice that all the highest points of the Accel "G" trace on the graph occur while the engine's rotating assy is losing rpm (discharging energy) against WOT. But then as soon as the clutch stops pulling the engine down and engine rpm begins to climb, the G trace drops like a rock as engine torque alone is now accelerating the car with no help from discharged inertia...

Just something you might not notice if you are currently "driving into the clutch" like a lot of class racers do.

Grant

Jim Hawkins · 10-09-2021, 11:13 PM

My SS/I 327 camaro lost .35 going from a jerico to a powerglide. This is up here in Denver. It needs a 3 speed but the stick will still be much faster.
Years ago with a bracket motor in the car went 11.20 with a glide. First time ever with a stick in the car went 10.66 first time out.

10-09-2021, 03:29 PM	#1
weedburner Junior Member Join Date: Apr 2016 Posts: 55 Likes: 1 Liked 20 Times in 16 Posts	Re: Stick vs Auto Stick has the potential advantage of launching at a much higher rpm than an automatic. Here's one of my ClutchTamer customer's sealed engine Coyote Stock graphs from several years ago, it clearly shows stored inertia energy contributing quite a bit to the car's initial acceleration rate. Energy that was stored prior to the start of the clock, then un-leashed after the start of the clock to boost acceleration. Notice that all the highest points of the Accel "G" trace on the graph occur while the engine's rotating assy is losing rpm (discharging energy) against WOT. But then as soon as the clutch stops pulling the engine down and engine rpm begins to climb, the G trace drops like a rock as engine torque alone is now accelerating the car with no help from discharged inertia... Just something you might not notice if you are currently "driving into the clutch" like a lot of class racers do. Grant __________________ Grant website- http://ClutchTamer.com We make your non-adjustable clutch...ADJUSTABLE!

10-09-2021, 11:13 PM	#2
Jim Hawkins Member Join Date: Jan 2010 Posts: 198 Likes: 89 Liked 115 Times in 35 Posts	Re: Stick vs Auto My SS/I 327 camaro lost .35 going from a jerico to a powerglide. This is up here in Denver. It needs a 3 speed but the stick will still be much faster. Years ago with a bracket motor in the car went 11.20 with a glide. First time ever with a stick in the car went 10.66 first time out.