Throttle Stopping

CUBEMAN · 10-10-2011, 02:43 PM

This will be my first venture into S/R racing and was kinda looking for pointers on the T/Stop settings. My car will be approx 1.75 sec under the index. I am looking at going on the stop at .2 or .3 and shifting at .6 and then being on the stop for 1.75 or the approx differance in et on a wide open run to a T/Stop run. Think I may be close or way off ?

jmcarter · 10-10-2011, 03:22 PM

Search the forum for "stop" and you'll see several helpful threads, this being one of them.

http://classracer.com/classforum/sho...highlight=Stop

Lots of variables (like stop RPM) but get close to find your ratio and go from there. Someone running about the same ET can give you a start point but "your results may vary". Biondo's site also has some good tech tips on running a stop.

CUBEMAN · 10-10-2011, 10:05 PM

Thanks,will do.

danny waters sr · 10-11-2011, 09:03 AM

Quote:

Originally Posted by CUBEMAN

This will be my first venture into S/R racing and was kinda looking for pointers on the T/Stop settings. My car will be approx 1.75 sec under the index. I am looking at going on the stop at .2 or .3 and shifting at .6 and then being on the stop for 1.75 or the approx differance in et on a wide open run to a T/Stop run. Think I may be close or way off ?

Look us up in Virginia and Jr will help you get in the right direction. Call me if you need to..
We will be there Thursday nite (early)

cdh124 · 10-11-2011, 10:43 AM

Quote:

Originally Posted by CUBEMAN

This will be my first venture into S/R racing and was kinda looking for pointers on the T/Stop settings. My car will be approx 1.75 sec under the index. I am looking at going on the stop at .2 or .3 and shifting at .6 and then being on the stop for 1.75 or the approx differance in et on a wide open run to a T/Stop run. Think I may be close or way off ?

My car will run 8.50 flat out and I am on the stop at .3, shift at .5 and am on the stop about 2.20 with air about 2500-3000ft and 4200 rpm while on the stop. Last year at Virginia in October I was on the stop about 2.5 seconds, hopes this helps.

Duane Dagostino · 10-11-2011, 10:47 AM

cdh124 is close if your "cruise " rpm's are about 4200. you'll be at 2.50 or so...good luck.

CUBEMAN · 10-11-2011, 12:09 PM

I will go to idle at .2 or .3 and shift @ .6 and thought that with a car that can run at least 1.75 under index that I would start by taking that amount (1.75) and stay on the stop that amount of time for starters. By running a Terminator I will go to idle quickly. I could be all wet here

jmcarter · 10-11-2011, 12:19 PM

Quote:

Originally Posted by CUBEMAN

I will go to idle at .2 or .3 and shift @ .6 and thought that with a car that can run at least 1.75 under index that I would start by taking that amount (1.75) and stay on the stop that amount of time for starters. By running a Terminator I will go to idle quickly. I could be all wet here

You're assuming a 1 to 1 ratio and that's incorrect...remember you're still covering ground while on the stop. And your RPM on the stop needs to be up in the ~4200 range. Think the others are right with 2.50 being close. Danny and his son can get you close too...better do the test and tune, you'll need 2-3 laps to even get close to your ratio.

CUBEMAN · 10-11-2011, 12:29 PM

Thanks for helping.

jmcarter · 10-11-2011, 01:19 PM

One of Biondo's excellent primers on stops, more on their site. They are great to deal with and one of ClassRacer's sponsors BTW.

http://www.biondoracing.com/manuals/...20Stops/TS.pdf

10-10-2011, 02:43 PM	#1
CUBEMAN Junior Member Join Date: Jul 2011 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Throttle Stopping This will be my first venture into S/R racing and was kinda looking for pointers on the T/Stop settings. My car will be approx 1.75 sec under the index. I am looking at going on the stop at .2 or .3 and shifting at .6 and then being on the stop for 1.75 or the approx differance in et on a wide open run to a T/Stop run. Think I may be close or way off ?

10-10-2011, 03:22 PM	#2
jmcarter VIP Member Join Date: Dec 2008 Location: Richmond Hill GA (and Port Ludlow WA) Posts: 4,304 Likes: 2,403 Liked 3,206 Times in 978 Posts	Re: Throttle Stopping Search the forum for "stop" and you'll see several helpful threads, this being one of them. http://classracer.com/classforum/sho...highlight=Stop Lots of variables (like stop RPM) but get close to find your ratio and go from there. Someone running about the same ET can give you a start point but "your results may vary". Biondo's site also has some good tech tips on running a stop. __________________ Jim Carter 2340 Super Stock 2340 SST/2340 Stock Set another place at the table

10-10-2011, 10:05 PM	#3
CUBEMAN Junior Member Join Date: Jul 2011 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle Stopping Thanks,will do.

10-11-2011, 10:47 AM	#6
Duane Dagostino Junior Member Join Date: Aug 2005 Location: Fl. Posts: 74 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle Stopping cdh124 is close if your "cruise " rpm's are about 4200. you'll be at 2.50 or so...good luck. __________________ Duane Dagostino 1821 S/C, S/G

10-11-2011, 12:09 PM	#7
CUBEMAN Junior Member Join Date: Jul 2011 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle Stopping I will go to idle at .2 or .3 and shift @ .6 and thought that with a car that can run at least 1.75 under index that I would start by taking that amount (1.75) and stay on the stop that amount of time for starters. By running a Terminator I will go to idle quickly. I could be all wet here

10-11-2011, 12:29 PM	#9
CUBEMAN Junior Member Join Date: Jul 2011 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle Stopping Thanks for helping.

10-11-2011, 01:19 PM	#10
jmcarter VIP Member Join Date: Dec 2008 Location: Richmond Hill GA (and Port Ludlow WA) Posts: 4,304 Likes: 2,403 Liked 3,206 Times in 978 Posts	Re: Throttle Stopping One of Biondo's excellent primers on stops, more on their site. They are great to deal with and one of ClassRacer's sponsors BTW. http://www.biondoracing.com/manuals/...20Stops/TS.pdf __________________ Jim Carter 2340 Super Stock 2340 SST/2340 Stock Set another place at the table