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Old 01-10-2006, 10:16 PM   #1
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Default What do I have to do to keep a Pro 4 together when...

I just installed the GTB 5.5 brushless system. All I've done is run a simple bench test with the motor installed. The shaft vibrated so vilolently I haven't bothered to drive it. My Q is, am I gonna have to upgrade to a carbon fiber shaft? And if so, what else can I beef up? This new system makes my 19T chameleon look like a wore out 540! Can't wait to track test...
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Old 01-10-2006, 10:23 PM   #2
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Quote:
Originally Posted by R40Victim
I just installed the GTB 5.5 brushless system. All I've done is run a simple bench test with the motor installed. The shaft vibrated so vilolently I haven't bothered to drive it. My Q is, am I gonna have to upgrade to a carbon fiber shaft? And if so, what else can I beef up? This new system makes my 19T chameleon look like a wore out 540! Can't wait to track test...
Are you sure you had the O rings installed in the center shaft drive cups?
I've had the Pro4 since it came out and I have never run into that problem.
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Old 01-10-2006, 10:29 PM   #3
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Just checked, yup. It doesn't look bent either, hardly moves at lower rpms. With the old 19Ts I was running, it didn't spool up that high, and never happened. It looks like the shaft itself is just flexing alot. That's why I'm asking about the carbon fiber upgrade.
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Old 01-11-2006, 01:37 AM   #4
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Quote:
Originally Posted by R40Victim
Just checked, yup. It doesn't look bent either, hardly moves at lower rpms. With the old 19Ts I was running, it didn't spool up that high, and never happened. It looks like the shaft itself is just flexing alot. That's why I'm asking about the carbon fiber upgrade.
Try upgrading with the HPI Carbon Fiber shaft. But it's good for 12T and above only. If you want a better and tougher carbon shaft for your pro4, check out this link in this site:
http://www.rctech.net/forum/showthread.php?t=66286


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Old 01-11-2006, 02:10 AM   #5
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If it 'hardly moves' it's still moving!!

So you have a bent shaft.

The graphite one is the next best thing, there is a bit of give, but before getting that try the o-ring mentioned above.
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Old 01-13-2006, 07:57 AM   #6
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A bent shaft will cause your problem. Mine does the same thing. I am going to up grade to the one on RCtech at some point. Or change to a T2
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