Want to run 9.90

Lenny5160 · 02-06-2019, 12:37 PM

How fast does the car run wide open? That will influence the options you have. As Hacksaw mentioned, you can go all the way to High gear while on the stop, but you probably want to be a full second quicker than the index (say a 8.90 or quicker car when trying to run 9.90) to pull that off. I get the feeling that your car isn't that quick.

I've never run a 3-speed, but here's what I think I would do in your situation. I'd launch the car hard, then put it on the throttle stop. Have your shifter hooked to a timer which would put the car in 2nd gear shortly after the throttle stop turns on. When the car goes wide open again, I'd either have some way to put the car in 3rd based on RPM or just shift it by hand at the desired RPM.

jlundy · 02-06-2019, 12:45 PM

Quote:

Originally Posted by Lenny5160

How fast does the car run wide open? That will influence the options you have. As Hacksaw mentioned, you can go all the way to High gear while on the stop, but you probably want to be a full second quicker than the index (say a 8.90 or quicker car when trying to run 9.90) to pull that off. I get the feeling that your car isn't that quick.

I've never run a 3-speed, but here's what I think I would do in your situation. I'd launch the car hard, then put it on the throttle stop. Have your shifter hooked to a timer which would put the car in 2nd gear shortly after the throttle stop turns on. When the car goes wide open again, I'd either have some way to put the car in 3rd based on RPM or just shift it by hand at the desired RPM.

To be honest I have no clue what it runs...........I run at altitude 4000ft. This is an all new combo 445ci SBF, C4 trans, 486 gears. 2260# with me in it.

Just fired the motor first time last Sunday while everyone was watching super bowl.

pmrphil · 02-06-2019, 02:09 PM

Quote:

Originally Posted by jlundy

To be honest I have no clue what it runs...........I run at altitude 4000ft. This is an all new combo 445ci SBF, C4 trans, 486 gears. 2260# with me in it.

Just fired the motor first time last Sunday while everyone was watching super bowl.

Have you done the math regarding rear gear and tire size? As far as finish line RPM goes?

jlundy · 02-06-2019, 03:03 PM

Quote:

Originally Posted by pmrphil

Have you done the math regarding rear gear and tire size? As far as finish line RPM goes?

Yes, I have and finish line rpm would be about 7600.

drgrcr1156 · 02-06-2019, 01:25 PM

I've never run a 3-speed, but here's what I think I would do in your situation. I'd launch the car hard, then put it on the throttle stop. Have your shifter hooked to a timer which would put the car in 2nd gear shortly after the throttle stop turns on. When the car goes wide open again, I'd either have some way to put the car in 3rd based on RPM or just shift it by hand at the desired RPM.[/QUOTE]

I run a 3 speed TH400 in 9.90 and this is how I have my shifts set.

02-06-2019, 12:37 PM	#1
Lenny5160 Senior Member Join Date: Nov 2015 Location: Inver Grove Heights, MN Posts: 898 Likes: 604 Liked 431 Times in 224 Posts	Re: Want to run 9.90 How fast does the car run wide open? That will influence the options you have. As Hacksaw mentioned, you can go all the way to High gear while on the stop, but you probably want to be a full second quicker than the index (say a 8.90 or quicker car when trying to run 9.90) to pull that off. I get the feeling that your car isn't that quick. I've never run a 3-speed, but here's what I think I would do in your situation. I'd launch the car hard, then put it on the throttle stop. Have your shifter hooked to a timer which would put the car in 2nd gear shortly after the throttle stop turns on. When the car goes wide open again, I'd either have some way to put the car in 3rd based on RPM or just shift it by hand at the desired RPM. __________________ S/ST 51 S/C 53

02-06-2019, 01:25 PM	#5
drgrcr1156 Junior Member Join Date: May 2010 Location: Massachusets Posts: 91 Likes: 0 Liked 2 Times in 1 Post	Re: Want to run 9.90 I've never run a 3-speed, but here's what I think I would do in your situation. I'd launch the car hard, then put it on the throttle stop. Have your shifter hooked to a timer which would put the car in 2nd gear shortly after the throttle stop turns on. When the car goes wide open again, I'd either have some way to put the car in 3rd based on RPM or just shift it by hand at the desired RPM.[/QUOTE] I run a 3 speed TH400 in 9.90 and this is how I have my shifts set.