Weight placement advice

Jan 23, 2015
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Hello
I was hoping that I could tap into the knowledge of the people who post on this board. By hank you for sharing. I have been lurking and learned so much simply by reading all that has been posted.

My son and I are building his scout car and I need some weight placement advice. Our rules state that we must use the stock slots for wheel placement, so the car has a standard scout wheel base and placement. Our pack uses a wooden track that I would say is pretty good, but not great. I think it is pretty hit or miss based on how well it is put together.

The car is made from one of derby dad 4 hire's blocks made into a standard wedge design. The car is routed out with a slot behind the rear axle that can hold up to 12 1/4 oz tungsten cubes. There is also a 1 x 1 inch pocket I front of the rear axle that can hold many cubes. As it presently stands, the car can hold about 22/23 cubes and not be over weight. The car is built to be a rail runner.

So my question... Where should I put the cubes? Should I put all 12 behind the axle? Is that too much to maintain control with the standard scout wheel placement on a wood track? With 12 cubes behind the axle, I can put in more steer (4" over 4' - that is what I read might be a good steer to put in) to maintain control, but is that a risk I should take on a wood track? Right now, with all of the weight in the car and in the most aggressive placement (12 behind the rear axle and 11 immediately in front of the rear axle). The center of mass is about 1/2 inch.

Your advice would be greatly appreciated. Thank you so much for your time. Also, let me know if I can provide any additional information to give a prophet opinion.
 
For a clearer idea of the weight pockets, the car has Derby Dad's ladder design with the standard scout wheel placement and wheel base.

http://www.shop.derbydad4hire.com/images/030.jpg
 
I'm sorry to burst your bubble sly fox, but that's one of the secrets most racers won't share. Yes 12 behind the rear axle, but as far as weight placement in front of the axle, you probably won't get the optimal weight placement to make your car the fastest. Some say more on DFW side others say the reverse. If your in a scout race and you can get 22-23 weights in your car I'd say you have nothing to worry about trying to get optimal weight placement.
 
Thanks for the reply Obsessed. Yeah, I get it on the trade secret of the exact weight placement. I guess what I am most concerned about is whether 12 cubes behind the rear axle on a stock scout car is too much with 11 in front (with a com of 1/2"). That combined with a wood track that I will not get to test on prior to the race. If my son's car comes off the track it is game over for him as they average the times.
 
12 behind! then go six and five. if you are at 1/2 com, You'd want all of 4" in 4'. you coud keep the same weight placement and slide them forward to be a less aggressive com 5/8 to 3/4 on a rougher track.
 
There are plenty of guys that go with 2 rows of 5 in the back for scout cars. Getting the holes drilled right will be your biggest advantage. Since DD4H did it I wouldn't be concerned about going with 12 in the back. The way you described your rules though make it seem that your rear axle holes are farther forward then in the stock photo you posted from DD4H site. In that photo the back axle position is 5/8" from the back.

It is common for pack rules that only allow the standard wheel base but still let you change where you place them. If the original slots need to be used one can simply cut an end 5/8" from the slot and glue the piece to the front.
 
ngyoung said:
There are plenty of guys that go with 2 rows of 5 in the back for scout cars. Getting the holes drilled right will be your biggest advantage. Since DD4H did it I wouldn't be concerned about going with 12 in the back. The way you described your rules though make it seem that your rear axle holes are farther forward then in the stock photo you posted from DD4H site. In that photo the back axle position is 5/8" from the back.

It is common for pack rules that only allow the standard wheel base but still let you change where you place them. If the original slots need to be used one can simply cut an end 5/8" from the slot and glue the piece to the front.

I should clarify. The pic I posted is the DD4H latter cut (off his website) just showing the weight pocket size on my son's car, not the distance for axle placement. While I got the block from DD4H, I got a block that had the axle holes drilled in the same distances that the slots on a stock scout block would be. I got a block from DD4h so the axle holes would be right. The pic is not accurate to the axle placement my son's car. Our pack rules say that we must use the exact distances and placement of the slots.
 
I think as long as your COM isnt shorter then 1/2" you will be fine since the holes were done by John.
 
I think you have the right Idea for 4" OF STEER IN 4'. Do you get any time pre race to tune the car? Bring some extra metal tape that you will use to hold the weight in and test the car for wiggles. Make sure to have a K-House groove on the DFW so you can adjust the steer quickly if necessary. Teach your boy how to tune it and all the other dads will be impressed that your boy is a pinewood whisperer. If you are wild on the wood track you'll be able to be more conservative on the com if they will allow you to have a tune in session, night before or morning of. Heck, offer to help set up. Good luck and a huge welcome to the forum Sly fox.
 
Thank you to everyone who posted with your advice. I am going to start calling my son the Pinewood Whisperer :-)
 
If you are using scout wheel base it might be bit more stable..but if you can test the car try 10 11 or 12..see which is best for that car
 
TRE said:
If you are using scout wheel base it might be bit more stable..but if you can test the car try 10 11 or 12..see which is best for that car

+1

I also have a cub racing. We entered a car with 12 behind and 12 in front using the stock wheel base (4 3/8"), but the front and rear could be relocated. It is a very aggressive setup and initially was a bit squirrely, especially with the short wheelbase. It certainly needed some track time / tuning before it could be raced. I would be conservative...
 
My scout and I ran 12 behind and 12 in front with no problems. My sons car sucked because his dad did a crappy job on it, but it still picked him up a W