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Old 2010.09.30, 02:32 PM   #16
benmlee
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The pin looks pretty good. Would say the only thing to watch out for is how deep that spring is recessed. Can't tell from the picture. The ball is loosing contact with more recess. But that is not the problem. Real problem is that the center of contact is shifted higher up in the ball. Shifted too high, and you will create a torque on the ball that will result in binding again.
Ratio of distance from center of contact to center of ball divided by the thickness of remaining material. If is greater than 2, then you will start getting into danger zone of binding.

Pan car always use spring on the king pin. Mini-z are so small is hard to fit the spring under the knuckle. Stock mini-z has about 2.5mm of suspension travel. 1/10 scale car probably only have slightly more travel, but they have more room to work with.
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Old 2010.09.30, 07:24 PM   #17
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Thanks for the info Ben. Yeah, we had looked into this, and waited to test it thoroughly before we announced the release for these reasons. But we have not found any problems with binding at all. We tested different depths of recession on the balls and also different length springs.

It all started because people wanted to run our kingpins with the PN lower parts. It evolved to people wanting reverse kingpins with the 4 degree caster setting. This takes care of both. The springs can be run at the top or at the bottom. No binding. No Rubbing. No Modifying.
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Old 2010.09.30, 07:38 PM   #18
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I cant wait to start running this... I have been fiddling around with reversing the stock kingpins, but dont like the arm flex. I think that this will be the most precise and responsive suspension for the MR03 yet...
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Old 2010.09.30, 11:36 PM   #19
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I cant wait to start running this... I have been fiddling around with reversing the stock kingpins, but dont like the arm flex. I think that this will be the most precise and responsive suspension for the MR03 yet...
Your gonna like this setup! i drove a few packs thru my car last weekend after putting on the reverse king pins, the percision is there, not to mention it is super smooth. The car was very easy to drive and went right where I wanted it to go.

With the Reflex long king pins I used Kyosho 5k grease but with the reverse king pins I found that it needed somthing thicker, the Reflex medium dampening grease worked very well for me.
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Old 2010.10.10, 04:12 PM   #20
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Pre-orders are now up for this set-up. It should be arriving in around 2 weeks. Reserve yours quick, as these will sell out!
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Old 2010.10.10, 08:30 PM   #21
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just placed my pre order cant wait to give them a shot.
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Old 2010.10.20, 05:32 PM   #22
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Parts have arrived!!! Ahead of schedule!!!

All orders are shipping tomorrow and Friday!!!
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Old 2010.11.17, 09:59 PM   #23
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Old 2010.11.17, 10:01 PM   #24
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above pic is what i am trying out with rr reverse king pin idea. i just used an 02 king pin with a 02 spring limiter as a shim. it works and allows me to work on easily as all i have to remove is 1 plastic e clip.
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Old 2010.11.17, 10:10 PM   #25
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i like that idea with the 02 pin, i think if the RR pins had a flange on bottom end of the pin and used a plastic e clip on the top it would make changes much easier and faster, "on the fly" like the extra long pins.
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Old 2010.11.17, 10:15 PM   #26
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Whenever the second edition comes out, we are considering the flange at the bottom. At the top however, we will keep the metallic e-clip to keep the cost of the kit down. We do not have molding capabilities yet.
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Old 2010.11.17, 10:23 PM   #27
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how about just let us provide the plastic e clip. im sure most everyone has them. but i do understand trying make a kit with all the parts in one package.

i really do like this setup and have gotten 2 cars running it and just set up this chassis to run a lm at 102 for this weekends carolina cup. i wanted to try this idea so i could change springs and shims a little faster on the fly.
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Old 2010.11.17, 11:15 PM   #28
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Dizzope What kind of springs did you use for the low-down underneath springs? Did you use the RR Set of springs from the RR Low-Down susp. kit?

Maybe I can try this with the 02 kingpin 1st. Then go lighter with RR's kit.
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Old 2010.11.18, 12:02 AM   #29
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Yes they are from the rr kit. You still need the lower balls as well. Me and CT spoke at the worlds about this and he mentioned the next batch may come with the lower flange. I just wanted to try it out sooner. I also got another idea. I've Seen a few good racers use the long arms with spring over and in normal spring postion. I was going to try this setup with a spring on top as well. Its worth trying out.
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Old 2010.11.24, 03:00 AM   #30
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