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Post by AJR on Sept 21, 2023 7:57:26 GMT -7
When I 1st joined this forum I came across a thread about building a mountain motor pro stock for inline comp which calls for ceramic grade motor magnets. In the thread they suggested using level 4 motor magnets so I always assumed level 4 and under poly magnets were considered ceramic grade. For the pancake classes the rules do call out the motor magnets that are acceptable. I have a dr1 with .490 tires and I got it down to .33xx at about 40mph using the jag N50 traction magnets in the stock location. I really don't see the need to lower the magnets with a .490 max tire (inline super stock max size) if you can get that speed and time out of them in the stock location. I wouldn't mind seeing if it helps but I don't want to cut one of my chassis lol. Maybe it's just me but when I read the rule about traction magnets in the stock location I think of forward and backwards and left and right movement not up and down. I agree with Skillet stacked magnets are more than 2 magnets. Adam the way I have always dealt with it is if the manufacturer describes it as "ceramic grade" then that's what it is. I think a lot of the ceramic grade motor magnets nowadays are actually poly dust molded into a magnet that are slightly stronger than stock ceramic with a more even magnetic field. But they are still considered "ceramic grade". The rules restrictions are on the motor magnets as far as type but most, if not all, of the traction magnets are neo so other than quantity, size, and location most are allowed. In both Pancake and Inline Stock thru Comp Classes only ceramic grade motor magnets are allowed. |
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Post by AJR on Sept 21, 2023 8:03:24 GMT -7
Eric... on pancake magnets... one side is stronger than the other... you want the strong side to pull on your armature, depending on wich way the arm spins... and the weak side of the magnets to release the arm when it spins... I guess a gauss meter is needed to determine strong side...weak side? Or is there some other "trick"? |
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Post by AJR on Sept 21, 2023 8:05:45 GMT -7
Yha stacking magnets got me to. That's why I started spelling that out in my sign up for race's... stacking magnets were everywhere Eric. All chassis. I thought well what the he'll. That's more than two magnets lol. I think we are going to need to set something up for dr1. They are a hot item because they fit our resin bodies for an inline car. And it won't be easy. I do like lowering the traction magnets. Way better performance. But that puts us in chassis modification because you have to cut the pocket bottom out... well once you cut your chassis it's technically in a different class. Some inlines you can't lower traction magnets, that's how the stacked magnets started , I think. Probably could run stacked magnets with lowered magnets, example lowered = cut pocket out of traction magnet holder... stacked = add shim washer magnet under my tyco 440x2... then if none of that's allowed and someone (me) makes there own traction magnet with epoxy and a magnet inside that allows it to sit lower... there are more than 3 ways to look at all of it... it's a tough conversation... I have been meaning to get with you on the DR-1 stuff. We can't create a special Class for every chassis out there, but that one seems to be very popular so maybe we can figure something out for it?? An interim Class or something?? If it takes off then we put it in for good. Thinking out loud.... |
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Post by pete on Sept 21, 2023 8:27:03 GMT -7
Eric... on pancake magnets... one side is stronger than the other... you want the strong side to pull on your armature, depending on wich way the arm spins... and the weak side of the magnets to release the arm when it spins... I guess a gauss meter is needed to determine strong side...weak side? Or is there some other "trick"? The HF home made downforce meter Gnome mentioned, all you need see how much pull the magnet has and what side is stronger. Plus you can see total pull on the motor face. |
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Post by AJR on Sept 21, 2023 17:39:12 GMT -7
I guess a gauss meter is needed to determine strong side...weak side? Or is there some other "trick"? The HF home made downforce meter Gnome mentioned, all you need see how much pull the magnet has and what side is stronger. Plus you can see total pull on the motor face. Yes I have been checking and matching my magnets with a digital scale for many years. Maybe I misunderstood what Sam was saying?? For whatever reason I was thinking he was saying there is a strong and weak side to the magnet face and depending on the rotation of the arm, you wanted to orient the magnet so the strong side pulls the arm in and weak side releases. |
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Post by pete on Sept 21, 2023 17:51:42 GMT -7
Motor face is how I find the strongest overall reading. Then if you do top and bottom, you will see one side pulls more than the other side. This is what Sam was describing. Road racers will put the strongest side down for handling.
Drag racing is all acceleration.
Next time your at your bench, take a car and spin it up at 6 9 12 volts. Then introduce a magnet in the traction location, flip it around do it again. Did it change? was one way better than the other? Fun with magnets Good Times
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Post by AJR on Sept 21, 2023 18:14:05 GMT -7
Motor face is how I find the strongest overall reading. Then if you do top and bottom, you will see one side pulls more than the other side. This is what Sam was describing. Road racers will put the strongest side down for handling. Drag racing is all acceleration. Next time your at your bench, take a car and spin it up at 6 9 12 volts. Then introduce a magnet in the traction location, flip it around do it again. Did it change? was one way better than the other? Fun with magnets Good Times I understand! Thank you for the clarification. I will definitely give it a try. |
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Post by skillet on Sept 22, 2023 11:17:59 GMT -7
Yep stand on end and check top and bottom. That will determine if the paint side is up or down in the chassis.
When I'm matching magnets I stand them on end and mark either side positive or negative. Then write the actual face pull number.
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Post by skillet on Sept 22, 2023 11:19:25 GMT -7
JJ my first race Dave had stacked magnets on an inline. That's how I found out about them... Dave is also asking about Dr chassis having dropped magnets for PennyWize619 race. That means cutting the pocket to drop.
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Post by skillet on Sept 22, 2023 11:20:12 GMT -7
Sorry it was my second race
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Post by dave632 on Sept 22, 2023 13:48:08 GMT -7
Motor face is how I find the strongest overall reading. Then if you do top and bottom, you will see one side pulls more than the other side. This is what Sam was describing. Road racers will put the strongest side down for handling. Drag racing is all acceleration. Next time your at your bench, take a car and spin it up at 6 9 12 volts. Then introduce a magnet in the traction location, flip it around do it again. Did it change? was one way better than the other? Fun with magnets Good Times Never tried that. I have matched magnets many times with little effect. Never tried unbalanced magnets as to have one side pull harder than the other. Will give it a try. |
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Post by dave632 on Sept 22, 2023 13:57:45 GMT -7
Too much magnet is no good! Try Neo traction magnets on one of your BSRT or Viper chassis. Way too strong unless you run your cars on the ceiling. They slowed even my unlimited cars down about 10 MPH.
I have to admit the Jag DR chassis with stock traction magnet location, (way too high), are not worth a darn. A simple solution was to allow an exterior magnet, along with the stock interior one, which I believe we had done at one time.
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Post by skillet on Sept 23, 2023 4:40:15 GMT -7
That's why I think depending on what we want to do with them in here, possibly their own class. I think we should get through Adam's race without chopping chassis right now.
It's his first race let's help him. Don't forget a note in your guy's box with name, screen name and short description of cars... that note is huge on a race host. When your in the zone text and pm get over looked... having that note sitting there is huge on a person.
Race will be here soon grab your orange or purple paint while supplies last.
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Post by pennywize619 on Sept 23, 2023 5:34:04 GMT -7
I have my Halloween cars ready! I believe ill do 3 guessing games with these 3. One is a stock dr1 another is a dr1 in Super Stock trim and the 3rd is a unlimited viper. I will post up the 1st guessing game during the 1st week in October.  |
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Post by finistauri on Sept 23, 2023 5:58:12 GMT -7
Adam, What Awesome Paint Work on the Pumpkin 🤔 Chevy and the Hurst with the Grave Yard on lower body, would seem near "Impossible" to achieve.
Fin
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