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Old 12-24-2005, 02:05 PM   #13636
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Quote:
Originally Posted by Essnowyt
Nicadrauspro4 - Its all personal preference. I still run 48pitch becuase I dont want to spend $30+ dollers on a set of 64pitch gears. I have a full set of 48 from ages ago. Others that run big mod motors use 48 as to not destroy spurgears.

As for smoothness, a 48 pitch Kimbro Spur and a Robbinson Racing Alumium Pinions are just fine. Stay away from the heavy steal pinions.

Snowy.
Oh, maybe I'll try the 48 pitch when I run with mod motors. Thanks!

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Old 12-24-2005, 02:37 PM   #13637
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anyone know if HPI sells a diff rebuild kit?
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Old 12-24-2005, 02:45 PM   #13638
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I don't think there is a one-shot rebuild kit that has everything other than a new diff kit. They have a parts bag with the diff rings, and balls .. then another bag with the thrust assembly (or use the AE one.)

You can buy the bearing that goes in between the out drives as well. Since individual components tend to fail its cheaper to by it part by part.

If your just looking for that small washer that goes under the thrust spring, your SOL because for some reason it has been unavailable since day one from HPI. It is thinner than the AE one, and I tried using a AE one instead and had very odd issues with keeping the diff together. You also can't just use a thrust washer there either because it's too thick. I have a diff built with just a washer I found that fit well enough, and the diff works but for some reason it makes it chatter.

I've searched HPI's site, and tried getting ahold of them and all I've gotten was "it's on backorder" as a response.
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Old 12-24-2005, 11:55 PM   #13639
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what set up should i use for tar it and has lots of grip im running foams 35 r/40f -19t and stock class 27t and red springs front tc3 /rear silver stock springs also its hot were i live thanks
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Old 12-26-2005, 05:43 AM   #13640
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Quote:
Originally Posted by Nicadrauspro4
Oh, maybe I'll try the 48 pitch when I run with mod motors. Thanks!

Nicadraus: I suggest you use 64pitch, our track is as smooth as ever no pebbles or rocks that can ruin your spur. On the other hand, 64 pitch plays a vital role on you FDR, by selecting ratio in small inrements compared to 48P.
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Old 12-26-2005, 01:28 PM   #13641
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Originally Posted by Geetoo
Nicadraus: I suggest you use 64pitch, our track is as smooth as ever no pebbles or rocks that can ruin your spur. On the other hand, 64 pitch plays a vital role on you FDR, by selecting ratio in small inrements compared to 48P.
Ok Garet. I'll take your advice. Thanks!

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Old 12-26-2005, 06:07 PM   #13642
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Hi, only reason I'm looking at swapping to 48pitch is because of outdoor racing.Recently, I ran our state titles and in practise, almost destroyed the 64pitch spur gear.no one else ran 64p and none of the hobby shops had any in stock. I ended up removing the damaged spur and turning it around,ran the 2 day event with it and finished 2nd in the B Final.Although the competition wasn't really hot, I am very happy with the strength and durability of the Pro 4 !!!
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Old 12-27-2005, 04:28 AM   #13643
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Quick? With the HPI spool that comes with the Hara, I have noticed there is a chattering sound and alot of vibration in the front when the car is benched and you turn it to the left or right. Has any-one else noticed this? Anyway to make it better. Do you use greese on the outdrives of the spool?
Thanks for the help..
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Old 12-27-2005, 09:34 AM   #13644
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Quote:
Originally Posted by jland
Quick? With the HPI spool that comes with the Hara, I have noticed there is a chattering sound and alot of vibration in the front when the car is benched and you turn it to the left or right. Has any-one else noticed this? Anyway to make it better. Do you use greese on the outdrives of the spool?
Thanks for the help..
that is normal when running with a spool.. this happens with other cars as well..not just the pro4.
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Old 12-27-2005, 02:03 PM   #13645
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Quote:
Originally Posted by jland
Quick? With the HPI spool that comes with the Hara, I have noticed there is a chattering sound and alot of vibration in the front when the car is benched and you turn it to the left or right. Has any-one else noticed this? Anyway to make it better. Do you use greese on the outdrives of the spool?
Thanks for the help..
the hpi spool COMES with grease. use it
in fact use it on all your drive pins (cvd's and center shaft)
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Old 12-27-2005, 05:59 PM   #13646
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in the hara editon there was a tube labeled heavyduty grease #z164 it looks like dark green in color i did not use it in the kit but i what to know if i can use it on the thrust bearings because i ran out of that black grease they supplied?
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Old 12-27-2005, 06:33 PM   #13647
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Quote:
Originally Posted by bosfan
in the hara editon there was a tube labeled heavyduty grease #z164 it looks like dark green in color i did not use it in the kit but i what to know if i can use it on the thrust bearings because i ran out of that black grease they supplied?
I never found any instructions for what that tube of grease was for. Anyone know?

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Old 12-27-2005, 08:24 PM   #13648
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Quote:
Originally Posted by bosfan
in the hara editon there was a tube labeled heavyduty grease #z164 it looks like dark green in color i did not use it in the kit but i what to know if i can use it on the thrust bearings because i ran out of that black grease they supplied?

A buddy of mine and I where trying to find out what the hell HPI used for the trust grease, we narowed it down to anti-zease compound, you can buy a whole tube for a few dollars at any local auto parts store.
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Old 12-27-2005, 11:22 PM   #13649
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How can I get more corner speed without having a unstable rear?

I hope that does not sound to odd
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Old 12-28-2005, 12:44 AM   #13650
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Thanks for your help Dodgeguy
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