100lb rule of thumb

Ed McLawhorn Jr. · 02-13-2016, 12:50 PM

Is the old "rule of thumb" of 100lbs to a .1 still close. I have used the "Wallace Racing" type of calculators, but was looking for someone with actual testing. I know there are many variables, but so were there years ago. My application is approximately 3400# low hp auto SS. Looking at moving up class by comparing weight for class and difference in indexes.

Ed

Jim Hanig · 02-13-2016, 02:07 PM

You need to try it. My car will pick .010 for removing 125 #. 3170 to 3045.

Jim Caughlin · 02-13-2016, 02:18 PM

The Wallace Racing formula is dead on for my car. 100# = .1 seconds I way off.

Jim Caughlin
SS 6019

The Hawk · 02-13-2016, 05:19 PM

My car is .0019 for each pound. Not kidding.

7423 · 02-13-2016, 08:04 PM

My 12 second car picks up .30 with a 225LBS removal. My BBC S/G car picked up .08 with a 100LBS removal.
Your mileage may vary...............

4406mopar · 02-14-2016, 04:25 AM

Depends if this weight is rotating weight, or dead weight on the body.

rod butcher · 02-14-2016, 03:13 PM

130 lbs = .012 and 1 mph in a 3rd generation camaro

Ed McLawhorn Jr. · 02-14-2016, 07:35 PM

Thanks everyone for your responses....

Paul Merolla · 02-15-2016, 11:38 AM

According to T-Ped on last night's broadcast from Pomona, every 10 lbs is worth a tenth!! If I could quit eating Taco Bell, I'd be 1.20 under in no time.

Ed Wright · 02-15-2016, 04:31 PM

Quote:

Originally Posted by Paul Merolla

According to T-Ped on last night's broadcast from Pomona, every 10 lbs is worth a tenth!! If I could quit eating Taco Bell, I'd be 1.20 under in no time.

That was close for my old Jr Stocker. Depends on HP levels. I think Tony should do some research, instead of quoting 40 year beliefs. My car, 100 = 6 hundredths, in decent air, seven in like 4000' + DA. 50lbs is a pretty consistant 3 hundredths any time..

02-13-2016, 12:50 PM	#1
Ed McLawhorn Jr. Member Join Date: Nov 2008 Posts: 306 Likes: 3 Liked 19 Times in 17 Posts	100lb rule of thumb Is the old "rule of thumb" of 100lbs to a .1 still close. I have used the "Wallace Racing" type of calculators, but was looking for someone with actual testing. I know there are many variables, but so were there years ago. My application is approximately 3400# low hp auto SS. Looking at moving up class by comparing weight for class and difference in indexes. Ed

02-13-2016, 02:07 PM	#2
Jim Hanig Senior Member Join Date: Aug 2006 Location: Pukwana SD Posts: 860 Likes: 554 Liked 99 Times in 49 Posts	Re: 100lb rule of thumb You need to try it. My car will pick .010 for removing 125 #. 3170 to 3045.

02-13-2016, 02:18 PM	#3
Jim Caughlin Senior Member Join Date: Mar 2002 Location: Woodburn, Or Posts: 683 Likes: 80 Liked 800 Times in 244 Posts	Re: 100lb rule of thumb The Wallace Racing formula is dead on for my car. 100# = .1 seconds I way off. Jim Caughlin SS 6019

02-13-2016, 05:19 PM	#4
The Hawk VIP Member Join Date: Mar 2003 Location: Littleton,Colorado Posts: 1,194 Likes: 0 Liked 249 Times in 109 Posts	Re: 100lb rule of thumb My car is .0019 for each pound. Not kidding. __________________ Lane Weber It`s Not What You Drive That Wins....It`s How You Drive It

02-13-2016, 08:04 PM	#5
7423 Senior Member Join Date: Dec 2006 Posts: 639 Likes: 0 Liked 1 Time in 1 Post	Re: 100lb rule of thumb My 12 second car picks up .30 with a 225LBS removal. My BBC S/G car picked up .08 with a 100LBS removal. Your mileage may vary...............

02-14-2016, 04:25 AM	#6
4406mopar Member Join Date: May 2009 Posts: 229 Likes: 166 Liked 113 Times in 50 Posts	Re: 100lb rule of thumb Depends if this weight is rotating weight, or dead weight on the body.

02-14-2016, 03:13 PM	#7
rod butcher Member Join Date: Dec 2005 Posts: 252 Likes: 297 Liked 132 Times in 27 Posts	Re: 100lb rule of thumb 130 lbs = .012 and 1 mph in a 3rd generation camaro

02-14-2016, 07:35 PM	#8
Ed McLawhorn Jr. Member Join Date: Nov 2008 Posts: 306 Likes: 3 Liked 19 Times in 17 Posts	Re: 100lb rule of thumb Thanks everyone for your responses....

02-15-2016, 11:38 AM	#9
Paul Merolla Senior Member Join Date: Dec 2001 Location: Papillion, NE Posts: 610 Likes: 242 Liked 293 Times in 65 Posts	Re: 100lb rule of thumb According to T-Ped on last night's broadcast from Pomona, every 10 lbs is worth a tenth!! If I could quit eating Taco Bell, I'd be 1.20 under in no time.