Computer e.t. and spped predictions
 

I'd like to hear some opinions from people who have experience with computer programs (online, or otherwise) that take either an eighth-mile time, or a 1,000-foot time, and predict the quarter-mile time from the numbers turned in the shorter distance(s).

I am curious about the accuracy of such predictions, and would appreciate hearing the experiences of people who have run eighth-mile (or, 1,000-ft) time trials or eliminations, and then run their car on a quarter-mile facility and have real numbers to compare with the computer predictions.

I realize that there are some uncontrollable factors (such as altitude, temperature, bite, and other considerations), but it might be possible to assess the accuracy of the computer results, if conditions were similar.


Thanks for any information on this. I'll appreciate your input!

Re: Computer e.t. and spped predictions
 

The best and more accurate is Quarter Pro, developed by Patrick Hale.

Re: Computer e.t. and speed predictions
 

Thanks for that information. I have used the Wallace computers, a free online site and believe them to be pretty accurate, but I haven'r actually checked them out with regard to quarter-mile stats, because this state has NO quarter-mile strips.

I'm not asking about horsepower numbers; just the accuracy of predicting quarter-mile times and speeds, when given the eighth-mile and/or 1,000-foot numbers.

Re: Computer e.t. and spped predictions
 

I had the family software package. It was not very accurate at all for a stocker. I think part of the issue is Stockers have a tendency to run really well in the first half of the track compared to the second half. When I tried using the run completion on aborted runs it would give me numbers I could only dream of running.

Re: Computer e.t. and spped predictions
 

I have used Performance Trends Drag Racing Analyzer v3.2 and also the Engine analyzer. They have produced very good results for both component changes and ET prediction with weather changes. Once you get your combination tuned in by using the match vehicle performance function, it has predicted very closly what different changes will do to your ET and engine RPM. I have used it for checking an 82 mustang as well as a rear engine dragster.

http://performancetrends.com/drag_racing_analyzer.htm

Re: Computer e.t. and spped predictions
 

Patrick Hale was the pioneer on this type of software. Many others follow with similar software and others were copycats too. Patrick was highly involved as a racer in Super Comp, Comp and also as a consultant for several Pro Stock teams.

Re: Computer e.t. and spped predictions
 

The two people that I like is Patrick Hale and Larry Meaux.

I was enjoying Larry's website(racemaxsoftware.com) the other day. You could e-mail your particulars and he will tell you where you should be and where you are missing it.

Greg

Re: Computer e.t. and spped predictions
 

Greg,
That's close, but it's www.maxracesoftware.com.

Larry Meaux had an ET program in beta, but he took it off the site a while back. I know it worked pretty well, I used it several times.

Patrick Hale's software was for sale a while back, about 2-3 months ago, in a package deal. Look at www.speedtalk.com, I think the guy that owns the site owns the rights and such to Hale's software now.

Re: Computer e.t. and spped predictions
 

Bill,
Check your PM

Re: Computer e.t. and spped predictions
 

Thanks for correction Alan.

Larry has a new program coming out any day. 4.0 version

Greg

Re: Computer e.t. and spped predictions
 

Bill -
Good to see you out and about!

To answer your question, talk to Verne. He has some basic percentages he has woked with for years that were always reasonably accurate for Stock/SS applications.

Re: Computer e.t. and spped predictions
 

Thanks for the kind words, Dwight. I went to Centerville today, but didn't take the car; too danged HOT!!!!

I'll definitely ask Verne about the programs he uses, when I see him!

Re: Computer e.t. and spped predictions
 

what about the Don Higgins "Crew Chief?" Do we have any users of that program?

Re: Computer e.t. and spped predictions
 

Larry,
Yes.. I have a Mopar bracket racer that uses "Crew Chief" and kicks a lot of BU** in Super Pro on the local level. He is a computer guy and is deadly with it. I helped him with the inital setup and did some follow up when he had a few hick-ups. (He didn't have the car suspension working well) It was easy for me to use.

Re: Computer e.t. and spped predictions
 

Re: Computer e.t. and spped predictions
 

Bobby, that is the program I have used to predict quarter-mile times from eighth-mile and 1,000-foot times.

I've never had a chance to verify the accuracy of those quarter-mile predictions (based on the 1/8th mile and 1,000-foot times actually run) and was curious as to how accurate they were.

Has anybody actually done this?

I'm just curious.... My car ran 9.74 @ 106 mph in 1,000 feet. Also, 7.59 @ 96 mph in the eighth. The Wallace program suggested that might equate to an 11.77 @ 116mph in a quarter-mile.

Does that sound reasonable? The car wouldn't hook; spun the tires all the way through 1st gear...

Any comments/advice will be appreciated.

Re: Computer e.t. and spped predictions
 

I know my car is stronger in the first half than in the back half where it runs out of steam.
Last pass I made was 7.94 in the 1/8th and 12.64 in the 1/4th.

The program perdicted that based on my 1/8th mile time, I should have run 12.46 in the 1/4th.

Since we have only 1/8th mile strips around here, and that's all I've worked on with my car,
I believe the predicter is probably pretty spot on.

Re: Computer e.t. and spped predictions
 

Thanks, Bobby. That's the kind of information I need.