1/8 mile and 1/4 mile corelation

rod · 09-22-2012, 07:27 PM

looking at some old NHRA records, it looks like a typical 13.00 1/4 ET translated to low 8's and the speed is about 20 - 23 mph different.
your thoughts
thanks rod in AZ

Jeff Lee · 09-22-2012, 10:49 PM

I think the multiplier is 1.56???

danny waters sr · 09-23-2012, 08:04 AM

1/8 mile et and multiply x 1.54696 = 1/4 mile et ...it is close but not perfect.............

Chris Hill · 09-23-2012, 12:54 PM

I've used 1.59 for us.

442OLDS · 09-25-2012, 02:47 PM

Quote:

Originally Posted by danny waters sr

1/8 mile et and multiply x 1.54696 = 1/4 mile et ...it is close but not perfect.............

I ran a 7.12 this past weekend.7.12 X 1.54696= 11.01.

I assure you that my car can run NO where near 11.01 right now.Whatever formula this is for is NOT applicable to ALL cars.

Andrew Hill · 09-25-2012, 02:55 PM

Mines pretty close to 1.59, although it definitely depends on the wind. The type of car will affect it too, sticks will run the backhalf better, as will more aerodynamic cars, etc.

danny waters sr · 09-25-2012, 05:47 PM

Quote:

Originally Posted by 442OLDS

I ran a 7.12 this past weekend.7.12 X 1.54696= 11.01.

I assure you that my car can run NO where near 11.01 right now.Whatever formula this is for is NOT applicable to ALL cars.

sorry ,,,it worked close for me ..

442OLDS · 09-25-2012, 06:06 PM

Quote:

Originally Posted by danny waters sr

sorry ,,,it worked close for me ..

Convertible top must be blowing up and slowing me down.....lol

danny waters sr · 09-25-2012, 08:22 PM

Quote:

Originally Posted by 442OLDS

Convertible top must be blowing up and slowing me down.....lol

lol.... size does make some diff too.when you do run 1/4 let me know what it ran and see if i was even close.

Lee Jordan (3223) A/S · 09-26-2012, 05:49 PM

Quote:

Originally Posted by 442OLDS

I ran a 7.12 this past weekend.7.12 X 1.54696= 11.01.

I assure you that my car can run NO where near 11.01 right now.Whatever formula this is for is NOT applicable to ALL cars.

I am sure that is true. After running both 1/4 and 1/8 adjust the formula to better fit your car. There are so many other factors involved you will never get it right on but it is still a good indicator when testing on an 1/8 mile track.

09-22-2012, 07:27 PM	#1
rod Member Join Date: Dec 2009 Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66 Posts: 307 Likes: 0 Liked 17 Times in 13 Posts	1/8 mile and 1/4 mile corelation looking at some old NHRA records, it looks like a typical 13.00 1/4 ET translated to low 8's and the speed is about 20 - 23 mph different. your thoughts thanks rod in AZ

09-22-2012, 10:49 PM	#2
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 2 Times in 2 Posts	Re: 1/8 mile and 1/4 mile corelation I think the multiplier is 1.56??? __________________ Jeff Lee 7494 D/S '70 AMX

09-23-2012, 08:04 AM	#3
danny waters sr VIP Member Join Date: Apr 2007 Location: lagrange,nc Posts: 2,224 Likes: 0 Liked 0 Times in 0 Posts	Re: 1/8 mile and 1/4 mile corelation 1/8 mile et and multiply x 1.54696 = 1/4 mile et ...it is close but not perfect............. __________________ Danny Waters, Sr / 73 Duster "340"

09-23-2012, 12:54 PM	#4
Chris Hill Senior Member Join Date: Jan 2002 Posts: 653 Likes: 8 Liked 238 Times in 25 Posts	Re: 1/8 mile and 1/4 mile corelation I've used 1.59 for us. __________________ Chris Hill https://ihmusedparts.com

09-25-2012, 02:55 PM	#6
Andrew Hill Senior Member Join Date: Mar 2008 Location: Chicago, IL Posts: 701 Likes: 427 Liked 170 Times in 38 Posts	Re: 1/8 mile and 1/4 mile corelation Mines pretty close to 1.59, although it definitely depends on the wind. The type of car will affect it too, sticks will run the backhalf better, as will more aerodynamic cars, etc. __________________ 3207 D/SA, C/ED Last edited by Andrew Hill; 09-26-2012 at 07:15 PM.