Throttle Stopping

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

Duane Dagostino · 10-11-2011, 03:15 PM

Going to idle w/fi changes a lot from carbs...try to find a racer with the same set-up,you could wind up 1-1 or close

Rich Biebel · 10-11-2011, 04:01 PM

You can install an electric leanout......turn it on when you go on the stop.

Experiment with pills to see what runs clean at somewhere around 4000 and once you have that done you can run your injection just like a carb.

Thats what I did and it worked well for me . I used a .050 pill in my leanout if I recall right.

Most people go to an idle with injection and if that works for you fine.....

I killed a second to go 8.90....and had close to 2 seconds stop time usually and used the leanout all the time.

One race the car was not responding to t-stop changes right.....I went down to 4 cars anyway..

I discovered the coil for the electric leanout had burned out and the leanout was not opening and that was why my t-stop time inputs were not following as they should have..

I have a Terminator on my dragster now.....never installed the leanout yet...mostly bracket race with it...

CUBEMAN · 10-11-2011, 10:24 PM

I have a electric lean-out on it with a .40 in it. Just like to throw something in the ole pit and see how we all look at it. More than likely will test and throw 1.75 in for a starter and then a change to get the multiplier and give them a whirl.

10-11-2011, 12:09 PM	#1
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	#3
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	#4
jmcarter VIP Member Join Date: Dec 2008 Location: Richmond Hill GA (and Port Ludlow WA) Posts: 4,310 Likes: 2,430 Liked 3,232 Times in 983 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

10-11-2011, 03:15 PM	#5
Duane Dagostino Junior Member Join Date: Aug 2005 Location: Fl. Posts: 74 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle Stopping Going to idle w/fi changes a lot from carbs...try to find a racer with the same set-up,you could wind up 1-1 or close __________________ Duane Dagostino 1821 S/C, S/G

10-11-2011, 04:01 PM	#6
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,320 Likes: 25 Liked 557 Times in 217 Posts	Re: Throttle Stopping You can install an electric leanout......turn it on when you go on the stop. Experiment with pills to see what runs clean at somewhere around 4000 and once you have that done you can run your injection just like a carb. Thats what I did and it worked well for me . I used a .050 pill in my leanout if I recall right. Most people go to an idle with injection and if that works for you fine..... I killed a second to go 8.90....and had close to 2 seconds stop time usually and used the leanout all the time. One race the car was not responding to t-stop changes right.....I went down to 4 cars anyway.. I discovered the coil for the electric leanout had burned out and the leanout was not opening and that was why my t-stop time inputs were not following as they should have.. I have a Terminator on my dragster now.....never installed the leanout yet...mostly bracket race with it... __________________ Rich Biebel S/C 1479 Stock 147R

10-11-2011, 10:24 PM	#7
CUBEMAN Junior Member Join Date: Jul 2011 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle Stopping I have a electric lean-out on it with a .40 in it. Just like to throw something in the ole pit and see how we all look at it. More than likely will test and throw 1.75 in for a starter and then a change to get the multiplier and give them a whirl.