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Old 07-19-2005, 01:06 AM   #12166
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what if you put a oneway in the front to make it RWD but still have brakes up front, that would be fun
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Old 07-19-2005, 06:42 AM   #12167
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Vulso, you need to re-gear for the big track.We are running Monster stocks in the 6.70FDR range on that big track.Also try adding 1 degree of anti-squat...This gives you better traction.I don't know about your springs ,but we run the HPI white's in front and the stock silver in the rear. Also come on down with the ride height...4.5mm front 5.0mm rear.Finally try the standard wheelbase(the big track like it better) and try 5frt 4rear for the droop.

Really the gearing change alone will get you closer to that one second your looking for.

Just come by and use my temp gun to make sure you stay under 170 degrees and you'll be fine.Shouldn't be aproblem our motors were temping at 150 geared like this and we had good top end speed on that long strait.
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Old 07-19-2005, 08:31 AM   #12168
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The diff screw and nut that comes with the Hara kit fit the old pro 4? If so, does anyone know the part # to order one for my car.
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Old 07-19-2005, 08:47 AM   #12169
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Yep it fits the normal Pro 4. On first impression the diff nut seems much better, it's all in one with the plastic holder so it's not as awkward to build the diff and when you screw it in it seems much tighter. One thing I have noticed though is that the screw looks exactly the same.

HP73522 - Differential Screw & Heavy Duty Nut 2mm Set
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Old 07-19-2005, 08:49 AM   #12170
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Thank you so much!
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Old 07-19-2005, 09:35 AM   #12171
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Quote:
Originally Posted by Kwikvdub
The diff screw and nut that comes with the Hara kit fit the old pro 4? If so, does anyone know the part # to order one for my car.
I've got one pack to sell... $4.00 shipped.
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Old 07-19-2005, 09:36 AM   #12172
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Quote:
Originally Posted by RCknight
which AE diff nut do I need for the Pro4? Is it the AE steel or pastic diff rebuild kit?

Also need the part number for the new Hara Pro 4 motor mount? Anyone know where I can order one from? Tower?
only seen the new motor mount sold in Japan from RainbowTen.

hopefully is will be available in the US.

Hara option parts list: the ordering system is not working properly.

http://www.hpiracing.com/kits/parts.php?partNo=187
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Last edited by rc-zombies; 07-19-2005 at 10:06 AM.
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Old 07-19-2005, 10:05 AM   #12173
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My Pro4 Hara edition is already build an ready for race, but it seems that we in europe have a different kit version than HPI Japan and HPI USA.
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Old 07-19-2005, 10:07 AM   #12174
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Quote:
Originally Posted by Marcel
My Pro4 Hara edition is already build an ready for race, but it seems that we in europe have a different kit version than HPI Japan and HPI USA.
what is different about the Euro version vs the Hara US version.
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Old 07-19-2005, 10:11 AM   #12175
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We have different aluminium inputshafts, Spool is included, 2 different pivot blocks, springs (white/purple), the original and the new shocks...
http://www.hpieurope.com/redir.php?linkID=188&lang=en
This is the link to the european version.
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Old 07-19-2005, 10:25 AM   #12176
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Quote:
Originally Posted by Marcel
We have different aluminium inputshafts, Spool is included, 2 different pivot blocks, springs (white/purple), the original and the new shocks...
http://www.hpieurope.com/redir.php?linkID=188&lang=en
This is the link to the european version.
looks same as US version. and you got 2 differents sets of shocks...
original and new? you are lucky.. might be packaging error. we got the new shocks.
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Old 07-19-2005, 10:33 AM   #12177
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Then it's only in Japan, here's the link: http://www.hpiracing.co.jp/contents/...005/index.html
In germany there are 2 sets of shocks included in the kit, no mistake...
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Old 07-19-2005, 12:20 PM   #12178
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hey if anyone is looking for a ceramic bearing set for their pro4 give me a PM. i have an extra set that i paid $200 for and never used, still NIB. i am asking for $125 shipped OBO so my loss is your gain. its all 17 bearings that go in a pro4 and let me tell you these are worth it, my drivetrain is soooo freaking free with these in it
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Old 07-19-2005, 03:02 PM   #12179
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Hey RC Zombies,

Still have the screw and nut. I'll take it and if you have anything eles. Let me know.

Thanks
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Old 07-19-2005, 05:01 PM   #12180
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hey guys everyone I know with a pro4 is having the same problem does anyone know of a fix for this cause its costing a small fortune

1st problem almost everytime the car is drivin we will break the front bevel gears its like the teeth just fall off even without any hits to the car

2nd this is really enoying the rear pivot ball on top of the rear hub after a few small taps to the rear wheels they shear off in the hub this is happening to everone I know even Nick Morris the top mod driver in Canberra

I heard you can now get alloy bevel gears but they are very pricy are they worth it and will alloy rear hubs make a difference to the pivot balls breaking off

thanks guys
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