different ts ratio between 1/8and 1/4 mile

[gnicholson]

I have found in my limited experience of running 6.90 1/8th Mile index that the throttle stop ratio is higher which makes sense to me because it's on the stop a shorter period of time and each change is Amplified more. In the quarter mile my ratio is 2.8 to 1 and it's closer to 4 to 1 in the 8th mile. I was wondering if anyone else has ever noticed this? I'm on the stop a little over a second less than 4 quarter mile.

[Lenny5160]

You should be able to answer this using all of your 1/4 miles runs. For each run after the first one on a given day, take the TS timer change and divide that by the ET change at the 1/4 and the 1/8 from the previous run.

Your results may be different than mine because I come off the stop in Low gear, but my ratios for the 1/4 and 1/8 end up looking very similar to each other on a run to run basis.

Congrats on the strong late-season performances and solid top-10 finish! I was watching 2nd round yesterday morning and pulling for you, so I understand why you may be asking this question.

[gnicholson]

thanks alot tony. i appreciate that. normally to run a 10.90 im right around 7.30 in the 1/8. I thought I had it figured out until that last run where my 60-foot was off .040. That was some of it. That track was all over the place. I seen a lot of people running way off the index along with some staggeringly bad reaction Times by a lot of people that are normally good. If I ever have to do it again I'll need some more data to make any kind of conclusion but there was three runs that pretty much agreed with each other that it was close to 4 to 1

[voltdr]

We just had this issue at the LODRS race in Noble OK this past weekend. 2 TTs at 1/4 mile then we switched to 1/8 mile. The ratios are very close. If you look at where you are adjusting, it's at the same point for both.
Dan

[gnicholson]

i turn the stop on at .02 and have it on about 110 numbers less than in the quarter. my ratio seemed to change but im kind of suspicious of my results from noble. you say your car was pretty consistent there?

[Lenny5160]

Originally Posted by gnicholson

...my ratio seemed to change but im kind of suspicious of my results from noble.

That's why I'd suggest looking at 1/4 mile runs from Topeka or somewhere that you know the car was good. You can see the 1/8 ratio and 1/4 ratio for the same run, and see if they are close or very different. It will almost never calculate to your actual ratio of 2.8 because of weather changes, but at least you can see how the two ratios relate to each other on a given run or set of runs.