How much weight to add when removing

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How much weight to add when removing

Postby fourshipp » Wed Feb 14, 2018 1:42 am

I have two of my three can am cars up and running with only the forward magnet. The Lola came with some lead added beside the motor and mid chassis. The McLaren has no weight added. The Lola is slower and looser in turns. Both are running trued PG urathanes.

Also running a DTM with no mags and PG urethanes. I have not added any weight to it. It drives nice but could be faster I think.


Questions:

How much weight should be added? What is the ideal weight range? Where should the weight be added? Rear, mid chassis or forward? Center of chassis or outboard? The McLarens have lots of room in the side pods.

How do you know when you have the right amount? Too much?

Thanks.

Bruce
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Re: How much weight to add when removing

Postby waaytoomuchintothis » Wed Feb 14, 2018 2:40 am

Unless you are only running on ovals, the only thing that matters is front-to-back positioning for center of gravity. I have tried side pod weights in all kinds of situations, and unless its an oval, it just doesn't matter, no matter how much sense it makes.

Meanwhile, the overall weight has to be proportionate to the motor, more than anything else. The old Scaley Camaros and Mustangs had a very consistent ideal weight, and a 1/4 ounce is enough to make them (or a Fly, for that matter), run right. Just as a general rule, get the guide and braids right down on the track, and then add weight if necessary to the rear after that for traction.
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Re: How much weight to add when removing

Postby RichD » Wed Feb 14, 2018 8:31 am

Adding weight does not necessarily increase a car's grip. For a start urethane tires work best if they have been polished, if they have any texture on the tread at all they will need to be polished. The main reason that I add weight is to lower the center of gravity of the car. If the car wants to lift the inside rear wheel in the corners adding weight behind the center of the car as low as possible will help a lot. If there is enough track clearance I put thin pieces of lead on the bottom of the car.
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Re: How much weight to add when removing

Postby HomeRacingWorld » Wed Feb 14, 2018 9:37 am

If you do not have any thin sheet lead, try this link here Adhesive backed lead
If you are wanting to record your data, go grab a digital scale. Wal-Mart has nice ones in the utensils area. As if I weigh my food...pfft, its for slot cars.

The only way to know is for you test yourself. There really isn't a "official" starting weight. I usually try 1/2 ounce or so at a time as I test.
Try and mount it as low as you can for best results. Just make sure if mounting below the car that it does not drag the track.
It will help more with control than traction. Reducing tipping, etc as already mentioned.
You can also use modeling clay instead of lead in smaller areas/crevices. It's messy, but it can work :)

Good luck.
-Harry

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Re: How much weight to add when removing

Postby nhdungeonracer » Wed Feb 14, 2018 7:28 pm

The only way to know is for you test yourself. There really isn't a "official" starting weight


Bingo!!

There are just too many variables on what works. Your track surface and how much traction you get from your tires on that surface will be different from what most other people have.
But in basic terms, if your car tips over in the corner, you need weight down low. If it slides out easily, you may need to add weight higher up. I've seen guys add weight to the rear window trying to get the tires to grip.

And every car will be different. You're going to need to experiment for yourself to get a feel for what works and doesn't work. Some of your experiments will fail, while others will work wonders (even if it doesn't make sense). But that's the fun of playing with little toy cars, learning as you go. :auto-driving:
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Re: How much weight to add when removing

Postby Brumos RSR » Wed Feb 14, 2018 9:46 pm

I would start near the front to keep the guide in, 2-3 grams if you're running magnets. Then it's trial and error. I was told a while ago, picture the chassis as you look overhead and draw a triangle from the guide mount to front of the rear tires. With in this triangle is where weight placement would be to stabilize a car, add or remove grip or limit tipping. Somewhere out there is a diagram for slot car weight placement. It's on the interweb as I remember seeing it before.
Last edited by Brumos RSR on Thu Feb 15, 2018 2:16 pm, edited 1 time in total.
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Re: How much weight to add when removing

Postby fourshipp » Thu Feb 15, 2018 9:47 am

Thanks. Yes I like playing with toys...

This track will be my “pool table” in my man cave. Great fun so far.

Is there any way to adjust Carrera front tire height other than tire size?

Thanks.
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Re: How much weight to add when removing

Postby HomeRacingWorld » Thu Feb 15, 2018 9:51 am

Some like to use the offset bushings by Sloting Plus for that. Link to bushings example.

So you will need to twist and remove your wheels to install these.

I do not use them myself, but others here have.
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