How car weight works

Coleydog · 01-28-2023, 11:29 PM

Ok I’ve read the specks on the NHRA site to get my HP and base car weight. But I’m still to dense to get it in my head right. 70 Duster 340 me 250 lbs. D is 10.0 factor E is 10.50 and F is 11.0. Does that mean to run F at 11.0 times 299 for HP then add 170 pounds (- 80 lbs me)to get car weight? Any help will be appreciated!

Alan Roehrich · 01-28-2023, 11:54 PM

Quote:

Originally Posted by Coleydog

Ok I’ve read the specks on the NHRA site to get my HP and base car weight. But I’m still to dense to get it in my head right. 70 Duster 340 me 250 lbs. D is 10.0 factor E is 10.50 and F is 11.0. Does that mean to run F at 11.0 times 299 for HP then add 170 pounds (- 80 lbs me)to get car weight? Any help will be appreciated!

What you posted looks like you have a handle on it. It's pretty simple. It's your NHRA HP factor multiplied by the weight break for the class. So, yes, 11x299+170. And you simply subtract the amount you weigh over 170 from the weight of the car.

Good luck and have fun!

Mark Yacavone · 01-29-2023, 12:30 AM

Weight breaks
D/S -9.5, E/S- 10, F/S-10.5

Larry Hill · 01-29-2023, 10:07 AM

Is your notch a driver?

Coleydog · 01-29-2023, 10:10 AM

Quote:

Originally Posted by Mark Yacavone

Weight breaks
D/S -9.5, E/S- 10, F/S-10.5

Well I got the weights wrong big time lol. That's a whole lot better. Thanks for the answer

Coleydog · 01-29-2023, 10:23 AM

Quote:

Originally Posted by Larry Hill

Is your notch a driver?

Very far from it, just a shell and rusty, one of the reasons I did the Duster.

Rob Petrie E395 · 01-29-2023, 12:45 PM

Goto the class racer info website. And make an account. Once you enter your car info. It’ll figure it all out for you.natural, lighter and heavier classes. But you have to register (it’s easy). I’m embarrassed to say. I’ve been looking at that website for a long long time. And just registered last week. I had no idea how much more info there was available. If you just register and log in.

Coleydog · 01-29-2023, 02:29 PM

Quote:

Originally Posted by Rob Petrie E395

Goto the class racer info website. And make an account. Once you enter your car info. It’ll figure it all out for you.natural, lighter and heavier classes. But you have to register (it’s easy). I’m embarrassed to say. I’ve been looking at that website for a long long time. And just registered last week. I had no idea how much more info there was available. If you just register and log in.

I did that a few years back but I’ll return to see if I have that correct

Coleydog · 01-29-2023, 09:21 PM

Ok what I come up with,
D/= car and me 3011 just car 2931
E/= car and me 3160 ‘’ ‘’ 3080
F/= 3310 3230
I’ll add 20 pounds at least to be on safe side

dragracerray · 01-30-2023, 10:56 AM

I don't think that is right. Correct me if I am wrong guys. Not sure if 3160 gets rounded up to 3165 or not.

car plus round up weight of
driver to nearest car without
weight 5 pounds 250 lb driver
D 9.5 multiplied by 299 plus 170 3010.5 3015 2765
E 10 multiplied by 299 plus 170 3160 3160 2910
F 10.5 multiplied by 299 plus 170 3309.5 3310 3060

01-28-2023, 11:29 PM	#1
Coleydog Senior Member Join Date: Jul 2014 Posts: 561 Likes: 33 Liked 47 Times in 32 Posts	How car weight works Ok I’ve read the specks on the NHRA site to get my HP and base car weight. But I’m still to dense to get it in my head right. 70 Duster 340 me 250 lbs. D is 10.0 factor E is 10.50 and F is 11.0. Does that mean to run F at 11.0 times 299 for HP then add 170 pounds (- 80 lbs me)to get car weight? Any help will be appreciated!

01-29-2023, 12:30 AM	#3
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,415 Likes: 2,581 Liked 4,449 Times in 1,694 Posts	Re: How car weight works Weight breaks D/S -9.5, E/S- 10, F/S-10.5 __________________ We are lucky we don't get as much Government as we pay for..... Will Rogers Last edited by Mark Yacavone; 01-29-2023 at 12:41 AM.

01-29-2023, 10:07 AM	#4
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,277 Likes: 1,635 Liked 9,453 Times in 1,956 Posts	Re: How car weight works Is your notch a driver? __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

01-29-2023, 12:45 PM	#7
Rob Petrie E395 VIP Member Join Date: Dec 2007 Location: Woodlawn IL Posts: 1,093 Likes: 162 Liked 219 Times in 79 Posts	Re: How car weight works Goto the class racer info website. And make an account. Once you enter your car info. It’ll figure it all out for you.natural, lighter and heavier classes. But you have to register (it’s easy). I’m embarrassed to say. I’ve been looking at that website for a long long time. And just registered last week. I had no idea how much more info there was available. If you just register and log in. Last edited by Rob Petrie E395; 01-29-2023 at 12:50 PM.

01-29-2023, 09:21 PM	#9
Coleydog Senior Member Join Date: Jul 2014 Posts: 561 Likes: 33 Liked 47 Times in 32 Posts	Re: How car weight works Ok what I come up with, D/= car and me 3011 just car 2931 E/= car and me 3160 ‘’ ‘’ 3080 F/= 3310 3230 I’ll add 20 pounds at least to be on safe side

01-30-2023, 10:56 AM	#10
dragracerray Member Join Date: May 2017 Location: Webster, New York Posts: 156 Likes: 311 Liked 122 Times in 57 Posts	Re: How car weight works I don't think that is right. Correct me if I am wrong guys. Not sure if 3160 gets rounded up to 3165 or not. car plus round up weight of driver to nearest car without weight 5 pounds 250 lb driver D 9.5 multiplied by 299 plus 170 3010.5 3015 2765 E 10 multiplied by 299 plus 170 3160 3160 2910 F 10.5 multiplied by 299 plus 170 3309.5 3310 3060 __________________ Ray Bassett I/SA 1687, SS/DA 1687 "SuperPro is both", unknown