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Author Topic:   Adding rear weight
strokerace45
Dirt Roller

Total posts: 11
posted March 01, 2005 08:17 AM  
Does anybody have any ideas about how to go about adding rear weight?

RACEINMUD
Dirt Freak

Total posts: 323
posted March 01, 2005 03:52 PM  
Stroker, not sure if this is what your looking for, But, I usually just bolt on lead to the frame or roll bar where I think it is needed. If you can post your specific need I'm sure the forum will help you out. Race

cd2
Dirt Maniac

Total posts: 161
posted March 01, 2005 07:23 PM  
strokerace45
How much weight do you need to add on the rear? cd2

racin78p
Dirt Freak

Total posts: 333
posted March 01, 2005 08:38 PM  
Go to the Menu on the upper left of this forum,... Click on Tool box,... scroll down to "other helping,..
Click on "ballast placement", by Longacher. READ IT.

This should give you more understanding about where to put weight. IT MATTERS.

Race on.

Be SURE to scale your car, whenever making weight adds or subtracts. Record in writing EVERTHING that you do, no matter how small. This can be very valuable info when making changes to your car at the track when time is very limited,...

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racin78p
if it ain't fun, then don't run

iowatoolman
Dirt Freak

Total posts: 369
posted March 01, 2005 10:42 PM  
ok i need the answer to the same question

i scaled my car and my rear percentage was a little low we figured that we needed to add about 120# to the rear left and right were perfect so how far back do i want to add the weight???

over the springs or as far back as the bumper

it is a metric car and i run figure 8's
this scaling thing is new to me

thanks for the help in advance

strokerace45
Dirt Roller

Total posts: 11
posted March 02, 2005 07:20 AM  
racin78p: Thanks a ton! I read the ballast article and it all came together. You're a big help!

cd2
Dirt Maniac

Total posts: 161
posted March 02, 2005 04:05 PM  
strokerace45
On the weight placement by longacre that deal works so so on asphalt cars as long as the left side & rear percentages are right & you need to only increase total weight.On a dirt car you do not need the weight down as low as you can get it unless the track is realy hooked up with a lot of bite an stays that way all night.No where did i see where they said anything about ride heights & weight placement.If you need to add weight to the rear only & you want to get the results that you need check the ride height on the rear then as you add weight adjust the ride height back to the original heights.If you have scales place the car on the scales take a reading on each wheel.Place a 100# weight on the rear then take another reading & you will see what is going on then set the rear ride heights back to original & you will see the weight show up where it should be.Placeing weight is very important & should be done with scale readings & ride height adjustment to be right & if you run dirt a tacky hooked up track requires a diffrent weight height than a dry slick track. cd2

RUFF
Dirt Roller

Total posts: 15
posted March 02, 2005 06:10 PM  
quote:
Originally posted by strokerace45:
Does anybody have any ideas about how to go about adding rear weight?

I ADDED 240 LBS TO MY METRIC CAR,WHERE THE REAR SEAT WOULD BE.EITHER SIDE OF THE DRIVESHAFT TUNNEL.PUT A LARGE ANGLE IRON ACROSS THE FRONT USED STEEL BARBELS TO FILL EITHER SIDE OF THE TUNNEL,FILLED IN WITH FOAM INSULATION AND COVERD OVER WITH A FLAT PEICE OF SHEET METAL.WORKED FINE,RAISED REAR WEIGHT % AND HANDLED ALOT BETTER.YOU DO NOT WANT TO ADD WEIGHT BEHIND THE REAR AXLE OF A DIRT CAR BECAUSE IT WILL AID IN SWINGING OUT THE REAR IN THE TURNS.

wrenchturner10
Dirt Forum Racer

Total posts: 80
posted March 03, 2005 08:15 PM  
When you added that weight in front of the rear tires, all it does is make the car heavier. What you have to do,is figure out what your leftside and rear percentages are and add weight accordingly to get your percentages where you need them. Any weight you add in front of the rear wheel will cause you to add more behind it to get your rear percentage correct. Scale,Scale,Scale it's the only way to tell.

iowatoolman
Dirt Freak

Total posts: 369
posted March 04, 2005 11:27 PM  
ok so will someone tell me where to add the rear weight?

when we scaled it we put a set of heads on the trunk lid and got the percentage we needed so where exactly do i add the weight over the axle or all the way to the bumper???

thanks

JLongaker
Dirt Newbie

Total posts: 3
posted March 04, 2005 11:30 PM  
you should make your weight easy to move I use a pipe full of lead and bolt it into place

JLongaker
Dirt Newbie

Total posts: 3
posted March 04, 2005 11:34 PM  
the futher away from the wheels the better also lower is better

iowatoolman
Dirt Freak

Total posts: 369
posted March 05, 2005 06:10 AM  
thanks for the clear answer

drive hard or drive home

Steve Dupree
Dirt Freak

Total posts: 316
posted March 06, 2005 06:54 AM  
Well would like to add a comment on adding weight. If you are light to begin with then i think it is great but if you are over your min. weight we have found that you are just loosing ground by adding weight . We scaled and added 100 lbs. and got all % better including rear and cross and we are racing a three day event right at this moment in Las Cruces NM. Are weight rule is 3000 with driver and we weighed 3398 with driver we added 100 and it really drove like a tank. When we started we weighed 3720 and with reskinning and loosing weight we thought we should add some back in the right places but man we were wrong. When you are only allowed a 2 barral and 9.5 comp. you do not have enough power to bring the rear around if you need to so you do not need as much rear %. We took all weight out yesterday and the car handled and turned as fast as the winning car the only thing was it was a one lane track and thats it. Springs,shocks, ride heights and air preasure are the keys to bombers and lower powered street cars. Along with your frontend settings. Well good luck to all and this is just what worked for me.

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