car weight

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car weight

Postby rzlwkj » Fri Sep 08, 2017 2:46 pm

As I read in the NHRA jr dragster rulebook the car must weigh a minimum of 225 lbs.....without the driver and their gear.
My question is why do people add ballast , is it to get the car to 225? or is there something I dont understand about this.....among many other things..... smiley-lol
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Re: car weight

Postby zrt-racing » Fri Sep 08, 2017 6:01 pm

I hope i am corrected if wrong on the reason for car weight minimum... but as far as I know the minimum car weight is to prevent anyone from lightening up a car to much (for whatever their own reasons may be) , or building one /having one built extremely light , and sacrificing the structural integrity and or safety of the car.
The ballast weight added is usual there to control speeds and help the team get to the 8.90 or 7.90 etc that are the IHRA/NHRA most packages will run faster with all the ballast removed.
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Re: car weight

Postby jtracr » Sun Sep 10, 2017 10:51 am

The ballist rules are really odd IMO. They say 225 lb minimum but you are able to accomplish this with 25 lb ballist? So I see that as a 200 lb minimum. We were in Denver for the WCF race (BTW the only place I have ever seen them check weight) and they would DQ you if you were under 225. Being a mile high track there were quite a few cars (half scales) going across the scales under? The builders know the rules, why not just build a 225 lb car to start off? I guess another reason I like the motivational cars, mine weigh 230 ready to run! Lol

But besides dumb rules, the main purpose to add or subtract ballist is to accomplish a certain ET. Most guys run a lot more motor than needed so when we take Denver trips we can still run the 11.90, 8.90, 7.90 etc. As weather varies you will have weight to play with too. Most cars in the 8.90 class are capable of running 8.50 or even faster using the ballist to slow them down.
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Re: car weight

Postby WOLFRACING » Sun Sep 10, 2017 12:12 pm

Technically you are only allowed so much ballast. Not that it is enforced.
If you start with an underweight car, and you are not over powered, you have the luxury of putting some ballast where it works best for the car.
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Re: car weight

Postby drags3078 » Mon Sep 11, 2017 11:33 am

There were NO rules in the beginning and cars were slow .... many of the older Mike Bos cars ( for example) with the bolt-on aluminum front end only weighed 185 lbs turn key with a big motor... the rule was for builders not to skimp-out making the Chassis hence the 225 pound minimum as car/engines got faster
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Re: car weight

Postby rzlwkj » Tue Sep 12, 2017 8:34 am

Thanks for the information, I will have more questions as I get deeper into my learning curve and I really appreciate the help everyone is giving!
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Re: car weight

Postby Alc8179 » Wed Sep 13, 2017 10:04 am

They weigh cars during the ECF's in Bristol as well.

Not as much elevation as Denver so really don't have to worry about it too much.
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Re: car weight

Postby Ben Bear » Tue Sep 26, 2017 1:37 pm

My younger driver got bigger, and our 11.90 engine is really great for smaller kids - when I dumped all the weight we were at 220! Even after placing the car at the c/l of the scale. We had to add 10 pounds and redo the setup, only to rained out in the lanes for E1 and then run in water grains of 148.5.....what a week!
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