weight question

Duster 318 · 03-07-2013, 07:00 PM

if i was to run O/SA what would my minimum weight be? or N/SA what would it be?

Tom Moock · 03-07-2013, 07:42 PM

I guess O/SA 3620, N/SA 3505 with driver, Mite need to known year and motor of car to be sure. Tom

jmcarter · 03-07-2013, 08:04 PM

Weight break x NHRA rated horsepower + 170 for "nominal" weight of the driver.

http://classracer.com/classes.html

pjfouts · 03-07-2013, 11:39 PM

what about if my car is in J/sa at 12.77 in order to run the class up K/SA do I factor based on the 13.00 break or the 13.49 break for my weight that i need to add? I think that was the question Duster had he was asking for me.

Lew Silverman · 03-07-2013, 11:59 PM

Following up on what Jim said -

If you check the classification guide for the year, make/model and combination you plan on running, the published factor (for example your 12.77 would be a J class rounded down to 12.50) is the key to determining what "natural" class you fall in. Use the guide to find out what the NHRA horsepower is for your chosen combination (there may be a few for each different engine depending on whether certain engine parts have been superseded) and then use the formula to come up with your minimum weight for that class. You always have the option of adjusting the vehicle weight to run one class higher or one class lower.

Lew

pjfouts · 03-08-2013, 12:12 AM

Right thats what im confused on though. How do i figure out how much weight to add? do i use the 13.00 or the 13.49 for K/SA weight break? I have my weight for J/SA "the natural class" but I really don't think I am fast enough to make any head way in that class.

Mark Yacavone · 03-08-2013, 01:17 AM

Jim and Lew told you the right way to figure it.
Now I'll tell you the easy way.
If you know the correct weight for J , just take the factored HP, divide it in half , and that's how much weight you add... You are moving down another half pound class> 12.50 to 13.00

pjfouts · 03-08-2013, 01:35 AM

Thanks a lot Mark. So much info to get through for all stock requirements I was starting to think i was losing my mind and couldn't understand basic math.

Phillip marvetz · 03-08-2013, 05:21 AM

It is rather confusing a first, Hang in there.

Duster 318 · 03-08-2013, 08:56 PM

my car is a 1970 plymouth duster with a 318 2 barrel. i am hoping to run N/SA but was wondering on my weight

03-07-2013, 07:00 PM	#1
Duster 318 Junior Member Join Date: Dec 2012 Posts: 42 Likes: 0 Liked 0 Times in 0 Posts	weight question if i was to run O/SA what would my minimum weight be? or N/SA what would it be?

03-07-2013, 07:42 PM	#2
Tom Moock Senior Member Join Date: May 2004 Posts: 801 Likes: 1 Liked 10 Times in 6 Posts	Re: weight question I guess O/SA 3620, N/SA 3505 with driver, Mite need to known year and motor of car to be sure. Tom __________________ Tom Moock 5704 STK

03-07-2013, 08:04 PM	#3
jmcarter VIP Member Join Date: Dec 2008 Location: Richmond Hill GA (and Port Ludlow WA) Posts: 4,294 Likes: 2,370 Liked 3,171 Times in 971 Posts	Re: weight question Weight break x NHRA rated horsepower + 170 for "nominal" weight of the driver. http://classracer.com/classes.html __________________ Jim Carter 2340 Super Stock 2340 SST/2340 Stock Set another place at the table

03-07-2013, 11:39 PM	#4
pjfouts Junior Member Join Date: Dec 2012 Posts: 41 Likes: 2 Liked 3 Times in 3 Posts	Re: weight question what about if my car is in J/sa at 12.77 in order to run the class up K/SA do I factor based on the 13.00 break or the 13.49 break for my weight that i need to add? I think that was the question Duster had he was asking for me.

03-07-2013, 11:59 PM	#5
Lew Silverman VIP Member Join Date: Mar 2010 Location: Newport News, VA Posts: 1,435 Likes: 371 Liked 129 Times in 59 Posts	Re: weight question Following up on what Jim said - If you check the classification guide for the year, make/model and combination you plan on running, the published factor (for example your 12.77 would be a J class rounded down to 12.50) is the key to determining what "natural" class you fall in. Use the guide to find out what the NHRA horsepower is for your chosen combination (there may be a few for each different engine depending on whether certain engine parts have been superseded) and then use the formula to come up with your minimum weight for that class. You always have the option of adjusting the vehicle weight to run one class higher or one class lower. Lew __________________ Lew Silverman #2070 "The Wagon Master" N/SA

03-08-2013, 12:12 AM	#6
pjfouts Junior Member Join Date: Dec 2012 Posts: 41 Likes: 2 Liked 3 Times in 3 Posts	Re: weight question Right thats what im confused on though. How do i figure out how much weight to add? do i use the 13.00 or the 13.49 for K/SA weight break? I have my weight for J/SA "the natural class" but I really don't think I am fast enough to make any head way in that class.

03-08-2013, 01:17 AM	#7
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,809 Likes: 2,900 Liked 5,113 Times in 1,948 Posts	Re: weight question Jim and Lew told you the right way to figure it. Now I'll tell you the easy way. If you know the correct weight for J , just take the factored HP, divide it in half , and that's how much weight you add... You are moving down another half pound class> 12.50 to 13.00 __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

03-08-2013, 01:35 AM	#8
pjfouts Junior Member Join Date: Dec 2012 Posts: 41 Likes: 2 Liked 3 Times in 3 Posts	Re: weight question Thanks a lot Mark. So much info to get through for all stock requirements I was starting to think i was losing my mind and couldn't understand basic math.

03-08-2013, 05:21 AM	#9
Phillip marvetz Senior Member Join Date: Oct 2008 Location: Lynden ,WA Posts: 820 Likes: 0 Liked 3 Times in 3 Posts	Re: weight question It is rather confusing a first, Hang in there. __________________ 2009 V/SA Record Holder

03-08-2013, 08:56 PM	#10
Duster 318 Junior Member Join Date: Dec 2012 Posts: 42 Likes: 0 Liked 0 Times in 0 Posts	Re: weight question my car is a 1970 plymouth duster with a 318 2 barrel. i am hoping to run N/SA but was wondering on my weight