POSTED THIS IN SPEED TIPS AND TRICKS ALSO, BUT THAT BOARD LOOKS MOSTLY UNUSED.
We have our car shaped with the primary weights in it. The body is 1 oz., with 3 tungsten bars behind the balance point (.75" forward of the rear axle). Total weight with the wheels and axles now is 4.2 ounces, so we are going to add 0.8 ounces of "balance weight". Our plan is to just try and spread the weight to make the balance point spot on. BUT here is my question to you pros out there: How much weight is necessary to have in the front of the car (front adjustment 3/8 hole 1" back from front tip) to maximize performance / minimize front end bounce, etc.?
Post by PinewoodPerformance on Jan 26, 2015 7:53:43 GMT -6
Your .75" CG is a little aggressive unless you are sure you will be on a very smooth Alu track. Are you setting your car up with a few scales for wheel load or just working with CG? Around .4 to .5 oz on the front wheel will be fine. With your weight as low as it is, adding will move your CG forward and .8" to .9" will be great and put the necessary weight on the front axle yet still give you the rearward weight needed for speed.
Our Pack has a very nice aluminum track with laser timers and all that. I'm just working with CG (if by that you mean Center of Gravity). Right now, the car sits at 4.2 oz., with the CG just rearward of the .75" target balance point by maybe 1/4". I'm just trying to figure out how to spread the remaining weight to maintain the balance point. If I put all of the extra weight in the front, it will move the CG too far forward, so we'll need to put some in the back as well.
Interesting. You suggest .4 to .5 oz on the front wheel. Is this a total front weight of .4 to.5 oz. or per wheel for a total of .8 to 1 oz.?
Our cars must run on 4 wheels. I weighed the front of ours and they vary from 1.06, .92 and .85 oz. All three were very fast. Won sibling and pack but the one with .85 oz. front weight had bad wheel bobble in one heat race!