Timer 2 caculation

Straightliner · 09-14-2012, 10:41 AM

Quote:

Originally Posted by Rick Bailey

8 to 1..... ? wow ! you might check that. however,

you need 15 hun of et change..... so you would use your 8. 8 x 15 = 120 add the 120 to your .6 to slow the car.

Most ratios are .... 2.0 to 3.0 depending on combo.

tell us what you have maybe we can help....

Rick

I was getting help from some seasoned 10.90 racers. They came up with 8:1 after I made some passes with a little time then a lot of time in the box. I agree it sounds high and I may have to revisit that but the math was responding with that ratio for that weekend.

Rick who taught you the calculation to figure it out? Am I missing the fact that it's a standard math equation? Or is it customized for this application?

They used different math!! I have to wait 'til I get home and I will let you know his math. Bare with me.

Thank you in advance.

RacingRicki · 09-14-2012, 11:50 PM

Straightliner,

Post up your times and the weather conditions and I will enter it into my software. It will tell you the ratio.

Rick Bailey · 09-15-2012, 01:37 AM

Yes , as RR said I can do the same for you.

I also would like to know what your stop rpm is, this is where the big ratio number may be coming from, again depending on your combo this number will be in the range of 3800 - 4400

the math is , a standard equation, ratio number x et change, however you must have the correct ratio.

Then your next step is change in the air .... but we'll go one step at a time

Rick

Straightliner · 09-15-2012, 10:05 AM

Small problem, I didn't have a weather station yet. He was using his, I do have the DA from his notes.

Stop rpm- 4000, Ratio from notes is 8.7:1. I only have times using the stop. They were as follows:

10.993- 3400 DA- 1.860 timer 2
10.923- 2400 DA- 1.860 timer 2
10.877- 2400 DA- 1.460 timer 2
10.903- 2400 DA- 1.660 timer 2

His math was- 10.90-10.8777=.023. .023x8.7=2.00. Old timer 2 # of 1.460+.200=1.660 is new timer 2.

Thanks guys I purchased a weather station and Crew chief Pro for next season.

Brad

Rick Bailey · 09-15-2012, 11:05 AM

I see there was a thousand ft differance in air, did that also end up in your ratio ?

Straightliner · 09-15-2012, 11:09 AM

As far as I know it was .067 per 1000 feet.

09-14-2012, 11:50 PM	#2
RacingRicki Sponsor Join Date: Sep 2005 Location: Colorado Posts: 106 Likes: 0 Liked 0 Times in 0 Posts	Re: Timer 2 caculation Straightliner, Post up your times and the weather conditions and I will enter it into my software. It will tell you the ratio. __________________ RacingRicki

09-15-2012, 01:37 AM	#3
Rick Bailey Senior Member Join Date: Sep 2002 Posts: 502 Likes: 5 Liked 10 Times in 7 Posts	Re: Timer 2 calculation Yes , as RR said I can do the same for you. I also would like to know what your stop rpm is, this is where the big ratio number may be coming from, again depending on your combo this number will be in the range of 3800 - 4400 the math is , a standard equation, ratio number x et change, however you must have the correct ratio. Then your next step is change in the air .... but we'll go one step at a time Rick __________________ Rick Bailey 3439 SC Last edited by Rick Bailey; 09-15-2012 at 01:41 AM.

09-15-2012, 10:05 AM	#4
Straightliner Junior Member Join Date: Jun 2012 Posts: 39 Likes: 0 Liked 0 Times in 0 Posts	Re: Timer 2 caculation Small problem, I didn't have a weather station yet. He was using his, I do have the DA from his notes. Stop rpm- 4000, Ratio from notes is 8.7:1. I only have times using the stop. They were as follows: 10.993- 3400 DA- 1.860 timer 2 10.923- 2400 DA- 1.860 timer 2 10.877- 2400 DA- 1.460 timer 2 10.903- 2400 DA- 1.660 timer 2 His math was- 10.90-10.8777=.023. .023x8.7=2.00. Old timer 2 # of 1.460+.200=1.660 is new timer 2. Thanks guys I purchased a weather station and Crew chief Pro for next season. Brad

09-15-2012, 11:05 AM	#5
Rick Bailey Senior Member Join Date: Sep 2002 Posts: 502 Likes: 5 Liked 10 Times in 7 Posts	Re: Timer 2 caculation I see there was a thousand ft differance in air, did that also end up in your ratio ? __________________ Rick Bailey 3439 SC

09-15-2012, 11:09 AM	#6
Straightliner Junior Member Join Date: Jun 2012 Posts: 39 Likes: 0 Liked 0 Times in 0 Posts	Re: Timer 2 caculation As far as I know it was .067 per 1000 feet.