Throttle stop down track?

jmech · 08-18-2009, 03:16 PM

New guy with a question. I'm new to .90 racing and was wandering if i can slow my car to 10.90 with the stop coming on at say 5.0 sec out rather than at .300 and still be consistant. Its just not mutch fun having it come on at the start then waiting 2.5 seconds to blast off. The car runs 9.70's at 140 all out. Any idea how long i would have to be on the stop starting that far out?

Chris Williams · 08-18-2009, 07:35 PM

People have tried this, with little/no success. Consistency is terrible.

Think about it this way: let's say you pick 5 seconds. Because of changes in weather (DA) your car is winding to a different RPM in the first 5 seconds, then you shut it down for some period of time. But from a different RPM each time.

If you shut down right off the line, you come down off a consistent (rev limited) RPM every time. The RPMs for the first N seconds are always the same. Not if you choose your way.

Also, think about how weird it would be to judge the stripe when slowing down... that'd be strange...

But hey, give it a shot...

Michael Pliska · 08-24-2009, 01:02 PM

There was a SG car at Pacific this past weekend, running 9.90's in Super-Pro at 112 mph. I was running my stop "old school" style where it switched on as I shifted to high gear, running 9.90's at 128 mph. Then again, neither of us won, but the other guy made it quite a few rounds.

BKSG1198 · 08-24-2009, 01:45 PM

We have been running our stop on the top-end for over 8 years now in D-1 S/G. At first it was very inconsistant and hard to get information since we are the only one's who do it. For the longest time we had a old Biondo throttle stop control with the thumbwheel in it but was told by Sam that all the dirt and garbage can get into the thumbwheel and make it very incosistant. You may put 6.15 in the box but because of the dirt in the gears it maybe really set on a 5.99. We always set the Stop RPM's at 4,000 for the whole day and don't touch it. You can do it a few different ways, you can set the bottom number at 1400 and play around with the top number. Depending on the track and weather conditions it may vary, a track like Atco in the Spring/Fall we run around 5.25 to 5.50 as the top number and then change it as the weather get's worse or better. Some other tracks like Numidia which has about 3600 A/A (About what you may deal with out west) we put 6.60 to 6.90 in the stop and it's right on a 9.900 run. It's something to try and it really really really screws up the 160 to 180mph cars who try to wheel race you because if you have a good light and are set up on a 90, 91, 92 they don't catch you till about 1,275 feet of the track and it's very hard for them to judge you. You also leave the top number at 5.00 or 5.50, etc and change the bottom number. This way the stop comes on and when the other car comes up on you and plays the wheel game and you have 9.25 in the box it will come back to life and really screw up their game. If you need any help please feel free to PM me.

Rob K.
112MPH S/G and loves screwing with the fast guys

Chris Williams · 08-24-2009, 04:59 PM

Rob, good for you. I love to see someone messing with folks' heads... If you can do it and win, more power to ya!

BKSG1198 · 08-24-2009, 06:47 PM

Chris,
I should videotape the reactions of the drivers who don't know we do the top end stop deal and it's funny. I raced Hollis C. from California in 1st round at our local Super Gas Series race this year and he didn't know about the stop. He laid down a 9.900 on me and beat me cause we messed up on the number but I went over to his trailer to congratulate him and he was like "I thought your throttle stop broke cause you were 20+ cars out on me and in my head I was like well I got this one won then I saw your nose drop and I started making up ground on you and I was like dam SOB has a top end stop, i'm in trouble". It really really messes with peoples head

Lou SG2340 · 09-07-2009, 05:15 AM

Quote:

Originally Posted by Chris Williams

People have tried this, with little/no success. Consistency is terrible.

Think about it this way: let's say you pick 5 seconds. Because of changes in weather (DA) your car is winding to a different RPM in the first 5 seconds, then you shut it down for some period of time. But from a different RPM each time.

If you shut down right off the line, you come down off a consistent (rev limited) RPM every time. The RPMs for the first N seconds are always the same. Not if you choose your way.

Also, think about how weird it would be to judge the stripe when slowing down... that'd be strange...

But hey, give it a shot...

In 2001 Ed DeSault was SG Champ He beat out Scotty Richerdson. Ed stops off the line then turns stop back on at the other end. If he needs to he will hit the over ride to get back in front

voltdr · 09-07-2009, 09:00 PM

At INDY, SC 228, Paul Fink, runs only 116 - 199 mph. He lost in round 2 (112 mph) because he was unable to judge backing into his opponent. It's just as hard going backwards.

Chris Williams · 09-07-2009, 10:35 PM

Quote:

Originally Posted by voltdr

At INDY, SC 228, Paul Fink, runs only 116 - 199 mph.

I sure hope you mean 116 - 119, otherwise that's a pretty darn big window

Michael Pliska · 09-08-2009, 11:56 AM

It's not much of an accomplishment, but I did manage to be #1 qualifier with a 6.301 (1/8-mile) at the recent D6 National Open, and ran a 6.300 1st round (then screwed up and ran 6.292 with too much stripe in the next round, trying to decide whether to race the nose or tire of the opponent), all at around 103 mph. The next slowest mph was around 113, while most were in the mid-upper 120's (and at least one over 130 mph). I was using a borrowed Dedenbear stop, hooked to a switch on my shifter. No timer at all, and manually shifting. I have good visibility in my car, so I can see them coming up on me. If I can afford it, I will run the upcoming D6 LODRS race the same way, should be fun.

Regards,

08-18-2009, 07:35 PM	#2
Chris Williams Member Join Date: Mar 2009 Location: Woodinville, WA Posts: 401 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle stop down track? People have tried this, with little/no success. Consistency is terrible. Think about it this way: let's say you pick 5 seconds. Because of changes in weather (DA) your car is winding to a different RPM in the first 5 seconds, then you shut it down for some period of time. But from a different RPM each time. If you shut down right off the line, you come down off a consistent (rev limited) RPM every time. The RPMs for the first N seconds are always the same. Not if you choose your way. Also, think about how weird it would be to judge the stripe when slowing down... that'd be strange... But hey, give it a shot... __________________ Chris Williams 6304 SC, TD, ET

08-24-2009, 01:02 PM	#3
Michael Pliska Member Join Date: Oct 2008 Location: Happy Valley, OR Posts: 260 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle stop down track? There was a SG car at Pacific this past weekend, running 9.90's in Super-Pro at 112 mph. I was running my stop "old school" style where it switched on as I shifted to high gear, running 9.90's at 128 mph. Then again, neither of us won, but the other guy made it quite a few rounds. __________________ Michael Pliska 643 S/G

08-24-2009, 01:45 PM	#4
BKSG1198 VIP Member Join Date: Jan 2007 Location: Vineland, NJ Posts: 2,630 Likes: 96 Liked 1,286 Times in 393 Posts	Re: Throttle stop down track? We have been running our stop on the top-end for over 8 years now in D-1 S/G. At first it was very inconsistant and hard to get information since we are the only one's who do it. For the longest time we had a old Biondo throttle stop control with the thumbwheel in it but was told by Sam that all the dirt and garbage can get into the thumbwheel and make it very incosistant. You may put 6.15 in the box but because of the dirt in the gears it maybe really set on a 5.99. We always set the Stop RPM's at 4,000 for the whole day and don't touch it. You can do it a few different ways, you can set the bottom number at 1400 and play around with the top number. Depending on the track and weather conditions it may vary, a track like Atco in the Spring/Fall we run around 5.25 to 5.50 as the top number and then change it as the weather get's worse or better. Some other tracks like Numidia which has about 3600 A/A (About what you may deal with out west) we put 6.60 to 6.90 in the stop and it's right on a 9.900 run. It's something to try and it really really really screws up the 160 to 180mph cars who try to wheel race you because if you have a good light and are set up on a 90, 91, 92 they don't catch you till about 1,275 feet of the track and it's very hard for them to judge you. You also leave the top number at 5.00 or 5.50, etc and change the bottom number. This way the stop comes on and when the other car comes up on you and plays the wheel game and you have 9.25 in the box it will come back to life and really screw up their game. If you need any help please feel free to PM me. Rob K. 112MPH S/G and loves screwing with the fast guys Last edited by BKSG1198; 08-24-2009 at 06:36 PM.

08-24-2009, 04:59 PM	#5
Chris Williams Member Join Date: Mar 2009 Location: Woodinville, WA Posts: 401 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle stop down track? Rob, good for you. I love to see someone messing with folks' heads... If you can do it and win, more power to ya! __________________ Chris Williams 6304 SC, TD, ET

08-24-2009, 06:47 PM	#6
BKSG1198 VIP Member Join Date: Jan 2007 Location: Vineland, NJ Posts: 2,630 Likes: 96 Liked 1,286 Times in 393 Posts	Re: Throttle stop down track? Chris, I should videotape the reactions of the drivers who don't know we do the top end stop deal and it's funny. I raced Hollis C. from California in 1st round at our local Super Gas Series race this year and he didn't know about the stop. He laid down a 9.900 on me and beat me cause we messed up on the number but I went over to his trailer to congratulate him and he was like "I thought your throttle stop broke cause you were 20+ cars out on me and in my head I was like well I got this one won then I saw your nose drop and I started making up ground on you and I was like dam SOB has a top end stop, i'm in trouble". It really really messes with peoples head

08-18-2009, 03:16 PM	#1
jmech Junior Member Join Date: Jul 2009 Posts: 1 Likes: 0 Liked 0 Times in 0 Posts	Throttle stop down track? New guy with a question. I'm new to .90 racing and was wandering if i can slow my car to 10.90 with the stop coming on at say 5.0 sec out rather than at .300 and still be consistant. Its just not mutch fun having it come on at the start then waiting 2.5 seconds to blast off. The car runs 9.70's at 140 all out. Any idea how long i would have to be on the stop starting that far out?

09-07-2009, 09:00 PM	#8
voltdr Senior Member Join Date: Jan 2008 Location: Texas Posts: 706 Likes: 77 Liked 100 Times in 51 Posts	Re: Throttle stop down track? At INDY, SC 228, Paul Fink, runs only 116 - 199 mph. He lost in round 2 (112 mph) because he was unable to judge backing into his opponent. It's just as hard going backwards.

09-08-2009, 11:56 AM	#10
Michael Pliska Member Join Date: Oct 2008 Location: Happy Valley, OR Posts: 260 Likes: 0 Liked 0 Times in 0 Posts	Re: Throttle stop down track? It's not much of an accomplishment, but I did manage to be #1 qualifier with a 6.301 (1/8-mile) at the recent D6 National Open, and ran a 6.300 1st round (then screwed up and ran 6.292 with too much stripe in the next round, trying to decide whether to race the nose or tire of the opponent), all at around 103 mph. The next slowest mph was around 113, while most were in the mid-upper 120's (and at least one over 130 mph). I was using a borrowed Dedenbear stop, hooked to a switch on my shifter. No timer at all, and manually shifting. I have good visibility in my car, so I can see them coming up on me. If I can afford it, I will run the upcoming D6 LODRS race the same way, should be fun. Regards, __________________ Michael Pliska 643 S/G