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Old 10-22-2011, 06:58 PM   #2671
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hey guys, I read about this (pro4 diff mod) some time ago, what is the over all feel of this, do you guys still to this? Just wondering if this is worth doing and maybe a little updated info on this...thx
I'm running it stock and it works fine.
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Old 10-22-2011, 07:01 PM   #2672
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I just got one from a friend of mine, runs great, but one problem. The front left tire will lock itself back when you turn it hard left. It will get stuck. I have to go to the car and turn the tire by hand than it is fine. Kinda hard to explain lol... Any ideas. It's almost like it has to much travel
Are you saying that the steering goes too far when you turn left? There should be a screw that goes through the upper and lower arms that act as a steering stop. Did it fall out?
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Old 10-22-2011, 07:25 PM   #2673
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I'm running it stock and it works fine.
Dont mean to sound rude, but I have stock also, that wasnt really the question. thanks though.
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Old 10-22-2011, 09:05 PM   #2674
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Dont mean to sound rude, but I have stock also, that wasnt really the question. thanks though.
There were those early on that didn't like the loud sound of metal on metal and found the plastic ring gear quieter. I have the pieces to do the conversion but could never figure out how the 2 diff halves stayed concentric with each other. With the stock setup, a bearing in the center lines everything up. With the plastic gear you are suppose to use a plastic spacer but it doesn't fit into the recesses of the metal outdrives so...... Asked that question on here but never got an answer. Is it worth doing? It depends if you want a quieter diff and if you have any problems with yours. As I said, my stock one works and I couldn't figure out how to get the mod to my liking (no wobbly misaligned diff halves). Maybe I'm just stupid.

Btw No offense taken. If I didn't answer you question feel free to ask again.

Last edited by Sydewynder; 10-22-2011 at 09:51 PM.
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Old 10-23-2011, 05:43 AM   #2675
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Originally Posted by Sydewynder View Post
There were those early on that didn't like the loud sound of metal on metal and found the plastic ring gear quieter. I have the pieces to do the conversion but could never figure out how the 2 diff halves stayed concentric with each other. With the stock setup, a bearing in the center lines everything up. With the plastic gear you are suppose to use a plastic spacer but it doesn't fit into the recesses of the metal outdrives so...... Asked that question on here but never got an answer. Is it worth doing? It depends if you want a quieter diff and if you have any problems with yours. As I said, my stock one works and I couldn't figure out how to get the mod to my liking (no wobbly misaligned diff halves). Maybe I'm just stupid.

Btw No offense taken. If I didn't answer you question feel free to ask again.
thx.
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Old 10-28-2011, 09:25 AM   #2676
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Hello, I picked up a HPI Cup Racer to start playing around with. Should hopefully be some good times!
Running with a Tekin RS Pro, Castle 4600 motor and a DS1015 servo.

On to the pictures!








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Old 10-28-2011, 11:21 AM   #2677
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Hello everyone,

I am new to the cup racer and need some help. Does the stratos body fit over standup front shocks? I want to order this body, but looking at the pictures it seems marginal. If it doesn't fit, what other body would you recommend? I have the Levin body but want to keep that as a shelf queen.

Thanks,
Daniel
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Old 10-28-2011, 11:27 AM   #2678
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wheelbase 210mm for the Strato body. laydown shocks on the front. Body is low slanting nose style.
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Old 10-28-2011, 01:06 PM   #2679
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Thanks superspeed, I have already found the wheelbase and wheel offset, and was hoping for a standup shock confguration; laydown seems more sloppy So what would be a good body for standup shocks? Maybe Porsche or 240z?
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Old 10-28-2011, 03:44 PM   #2680
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I'm using stand up with the Porsche body.
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Old 11-02-2011, 02:35 PM   #2681
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Thanks rc77, seems like the lhs has the Porsche in stock.
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Old 11-03-2011, 01:13 AM   #2682
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My new Cup Racer.
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Old 11-03-2011, 03:28 AM   #2683
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Just finished fixing mine up a few days ago. Got it cheap on ebay with the front diff not working, a few spares later and I have a CR . Love that dato body.




Still needs an LED kit, but that can wait.
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Old 11-03-2011, 09:19 AM   #2684
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My new Cup Racer.
ok I will bite, what brand body, where did you get it?
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Old 11-03-2011, 09:51 AM   #2685
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That is the parma body. 225 wheelbase i believe.
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