Where is it legal to add ballast?

dragracerray · 06-16-2021, 01:58 PM

I am changing classes and need to add 100lb (ug). I will use 2, 1/2" bolts with welded nuts per the rules,

Is it legal
-to add ballast in the passenger compartment?
-to add ballast under the car?
-to add ballast in the trunk?

thanks in advance, Ray

Hacksaw · 06-16-2021, 04:17 PM

All are legal, provided proper mounting. Try over top of rear as first choice.

SSDiv6 · 06-16-2021, 10:43 PM

Quote:

Originally Posted by Hacksaw

All are legal, provided proper mounting. Try over top of rear as first choice.

Top of the rear will affect the dynamics of the suspension. Start adding weight a few inches in front of the rear end pinion.

Larry Hill · 06-17-2021, 07:11 AM

Look in class rules and general regulations in the rule book on how to add weight safely. All so talk to tech and ask if there are places where adding weight is not allowed.

cad · 06-17-2021, 11:40 AM

Would it be legal to add it to the rear axle housing vs inside the car?

Larry Hill · 06-18-2021, 08:32 AM

Guess you could make the axle tubes out of thicker material.

west coast · 01-27-2022, 04:36 PM

Best place for ballast is at the end of the track, waiting for you to it pick up.

e vassar · 01-27-2022, 07:49 PM

Quote:

Originally Posted by west coast

Best place for ballast is at the end of the track, waiting for you to it pick up.

I know this was meant in jest,but be careful folks. Awhile back D4 was checking everyone at fuel check for loose ballast inside the car. A few racers got bounced!

mjacquesjr · 01-26-2022, 08:20 PM

General Regulations Section 21, page 19
General Regulations
Requirements) is permitted. Removable weight must be securely
mounted to the frame or frame structure by a minimum of two
1/2-inch-diameter steel bolts per 100 pounds, or one 3/8-inch
steel bolt per 5 pounds; all other weight bars, pucks, etc. must
use minimum 1/2-inch-diameter SAE grade 8 bolts for attachment.
Hose clamps, wire, strapping, tape, tie wraps, etc. for securing
weight or ballast prohibited. Acceptable forms of ballast are 1)
Heavier gauge steel floors (i.e., 16- or 18-gauge, heavier gauge
and/or plate steel prohibited); 2) Frame reinforcing cross members;
or 3) the addition of protective equipment such as roll bars,
flywheel shield, etc. If additional ballast is needed and is permitted
by Class Requirements, it must be permanently attached to frame,
bolted with two 1/2-inch-diameter bolts per 100 pounds, with nuts
welded to bolts. Maximum amount of removable and/or permanent
ballast, unless otherwise stated under Class Requirements, is 500
pounds. Cars running 8.49 and quicker are limited to 250 pounds
maximum, per SFI chassis specification.

Chevy55 · 01-26-2022, 09:37 PM

My suggestion would be if you have access to 4 corner scales see which corner of the car needs the weight.

06-16-2021, 01:58 PM	#1
dragracerray Member Join Date: May 2017 Location: Webster, New York Posts: 221 Likes: 475 Liked 209 Times in 90 Posts	Where is it legal to add ballast? I am changing classes and need to add 100lb (ug). I will use 2, 1/2" bolts with welded nuts per the rules, Is it legal -to add ballast in the passenger compartment? -to add ballast under the car? -to add ballast in the trunk? thanks in advance, Ray __________________ Ray Bassett I/SA 1687, SS/DA 1687 "SuperPro is both", unknown

06-16-2021, 04:17 PM	#2
Hacksaw Senior Member Join Date: Sep 2016 Posts: 882 Likes: 206 Liked 310 Times in 174 Posts	Re: Where is it legal to add ballast? All are legal, provided proper mounting. Try over top of rear as first choice.

06-17-2021, 07:11 AM	#4
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,640 Likes: 1,940 Liked 10,714 Times in 2,230 Posts	Re: Where is it legal to add ballast? Look in class rules and general regulations in the rule book on how to add weight safely. All so talk to tech and ask if there are places where adding weight is not allowed. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

06-17-2021, 11:40 AM	#5
cad Senior Member Join Date: Apr 2009 Location: Omaha, NE Posts: 702 Likes: 202 Liked 91 Times in 51 Posts	Re: Where is it legal to add ballast? Would it be legal to add it to the rear axle housing vs inside the car?

06-18-2021, 08:32 AM	#6
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,640 Likes: 1,940 Liked 10,714 Times in 2,230 Posts	Re: Where is it legal to add ballast? Guess you could make the axle tubes out of thicker material. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

01-27-2022, 04:36 PM	#7
west coast Senior Member Join Date: Dec 2008 Location: Rainy Washington Posts: 609 Likes: 12 Liked 223 Times in 73 Posts	Re: Where is it legal to add ballast? Best place for ballast is at the end of the track, waiting for you to it pick up. __________________ James Boyce 6052 K/SA Stock National record holder 2015,2018,2 times in 2022,2023

01-26-2022, 08:20 PM	#9
mjacquesjr Junior Member Join Date: Nov 2008 Location: Baton Rouge LA Posts: 43 Likes: 6 Liked 1 Time in 1 Post	Re: Where is it legal to add ballast? General Regulations Section 21, page 19 General Regulations Requirements) is permitted. Removable weight must be securely mounted to the frame or frame structure by a minimum of two 1/2-inch-diameter steel bolts per 100 pounds, or one 3/8-inch steel bolt per 5 pounds; all other weight bars, pucks, etc. must use minimum 1/2-inch-diameter SAE grade 8 bolts for attachment. Hose clamps, wire, strapping, tape, tie wraps, etc. for securing weight or ballast prohibited. Acceptable forms of ballast are 1) Heavier gauge steel floors (i.e., 16- or 18-gauge, heavier gauge and/or plate steel prohibited); 2) Frame reinforcing cross members; or 3) the addition of protective equipment such as roll bars, flywheel shield, etc. If additional ballast is needed and is permitted by Class Requirements, it must be permanently attached to frame, bolted with two 1/2-inch-diameter bolts per 100 pounds, with nuts welded to bolts. Maximum amount of removable and/or permanent ballast, unless otherwise stated under Class Requirements, is 500 pounds. Cars running 8.49 and quicker are limited to 250 pounds maximum, per SFI chassis specification.

01-26-2022, 09:37 PM	#10
Chevy55 Banned Join Date: Nov 2014 Posts: 324 Likes: 625 Liked 179 Times in 89 Posts	Re: Where is it legal to add ballast? My suggestion would be if you have access to 4 corner scales see which corner of the car needs the weight.