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Old 03-29-2011, 08:08 PM   #1096
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The HB springs that are used for asphalt set ups. Are these the same springs that were used on the HPI pro 4?
Pretty much. I believe there is a newer version out that are all black springs, but I've been running the coloured versions for, well, a long time... not letting them go, they are like gold dust!
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Old 03-29-2011, 08:12 PM   #1097
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Any feed back on the new ball diff ? how many run before rebuild it ?
is the diff protection ok now ?

My 416 diff ball was going crappy quickly
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Originally Posted by Electro-MAX RC View Post
My diff is still butter smooth after 4 race meets and 20 packs of practice. I took some extra time sanding both sides of the diff rings. Used stealth grease on the balls (stock) and the Tamiya anti-wear on the thrust. All I can think is the smooth surface and micro scratches allows you to run the diff loose but not slip. Btw, I run 17.5.
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I was able to run 416 diffs in mod for at least 4-6 racedays before rebuilding. Just like Electro said, taking a little extra time building the diff will make it last a lot longer. I would recommend the Tamiya 3mm ceramic balls, they should last through a few diff rebuilds without needing replacing and are smoother than the stock steel balls. The Tamiya 3mm carbide balls will generally build a smoother diff, but will need to be replaced with each rebuild.
The new diff is much better, as the outdrives fully fill the pulley, reducing a lot of dirt ingress. I always built mine up with ceramic balls, and do last a long time. One other trick for the diff is to remove the "spacer pucks" off the pulley, stops it touching the plates, and helps to free the action up a little more.
Having said that, I haven't run a ball diff in a while... loving the ease and simplicity of the gear diff!

Ed
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Old 03-29-2011, 08:44 PM   #1098
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Pretty much. I believe there is a newer version out that are all black springs, but I've been running the coloured versions for, well, a long time... not letting them go, they are like gold dust!
Ed have you ever tried the Hara spring set in similar rates as the HPI silver and Gold sets?

When you run the HPI do you normally run all of one rate or mix front/rear?
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Old 03-29-2011, 09:24 PM   #1099
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Pretty much. I believe there is a newer version out that are all black springs, but I've been running the coloured versions for, well, a long time... not letting them go, they are like gold dust!
Thanks I will try silver this weekend. I've only used Tamiya springs on both carpet and asphalt. I will be running mod on med traction asphalt
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Old 03-29-2011, 10:19 PM   #1100
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Ed have you ever tried the Hara spring set in similar rates as the HPI silver and Gold sets?

When you run the HPI do you normally run all of one rate or mix front/rear?
Never tried the Hara's.
Tend to run either Silver/Silver or Pink/Silver.
Occasionally use Silver/blue if the traction is low.

HiH
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Old 03-29-2011, 10:54 PM   #1101
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Kody, you out there? How was the car at 'nats? Learn any tricks?
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Old 03-30-2011, 12:45 AM   #1102
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I just bought a 417 is it a must to CA your CHASSIS or leave it the way it is.
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Old 03-30-2011, 03:38 AM   #1103
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Originally Posted by M3dreamin2008 View Post
Thanks I will try silver this weekend. I've only used Tamiya springs on both carpet and asphalt. I will be running mod on med traction asphalt
I ran HPI silvers for the first time last weekend, the car was the best it has been, and honestly although the rates are simular to other brand springs, they are magical. I borrowed them from a local guy, he wouldnt part with them for any money lol, and I asked 2 other guys and same deal, 50 bux, no go lol


So I Finally found some silvers, and I bought the full hara set also, will report back when They arrive. The Hara purple's are a simular rate, not sure if they are linear tho?

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Old 03-30-2011, 04:38 AM   #1104
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https://www.ssl-stormerhobbies.com/c...=ns&pn=HPI6825

are these the silver springs mentioned?
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Old 03-30-2011, 05:30 AM   #1105
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If your gonna run HPI springs get some Roche retainers they fit the HPI springs spot on.
Hara springs are progressive not linear, most guys at our track run HPI springs we have tried Hara's but find the HPI the best.

Rhys

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I ran HPI silvers for the first time last weekend, the car was the best it has been, and honestly although the rates are simular to other brand springs, they are magical. I borrowed them from a local guy, he wouldnt part with them for any money lol, and I asked 2 other guys and same deal, 50 bux, no go lol


So I Finally found some silvers, and I bought the full hara set also, will report back when They arrive. The Hara purple's are a simular rate, not sure if they are linear tho?

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Old 03-30-2011, 05:33 AM   #1106
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Like Ed said above, lots of guys these days are running gear diifs, if you still run a ball diff get a gear diff and give it a go, took me a coulpe of runs to get the feel of it but now wouldnt go back to a ball diff, try 1000 to 2000 oil in it.

Rhys
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Old 03-30-2011, 06:06 AM   #1107
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Originally Posted by Jamison R View Post
https://www.ssl-stormerhobbies.com/c...=ns&pn=HPI6825

are these the silver springs mentioned?
No they are not the one.U need to get the springs for the HPI Pro 4. The part no. Is #6543

The Length is 25mm x 14mm

I hope this will help you
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Old 03-30-2011, 06:08 AM   #1108
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Originally Posted by crabboy View Post
If your gonna run HPI springs get some Roche retainers they fit the HPI springs spot on.
Hara springs are progressive not linear, most guys at our track run HPI springs we have tried Hara's but find the HPI the best.

Rhys
The Roche retainers are very scarse.
I can't find them available anywhere...
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Old 03-30-2011, 06:26 AM   #1109
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The Roche retainers are very scarse.
I can't find them available anywhere...
try here http://www.kshobby.com/index.php?rou...ory&path=49_52
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Old 03-30-2011, 07:56 AM   #1110
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Yeah, I must correct myself.Thats the only one I found to bo honest.
Tried to do business with them but it kinda went wrong.
Just leave it at that.

I'ld appreciate any other shops though...
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