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Old 12-24-2003, 06:11 PM   #1201
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Sweet.

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Old 12-25-2003, 11:30 PM   #1202
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my best friend just bought me an R40 for X mas so its on the way . does anyone know when some of the japan released options will hit the US shores? i dont like adding options as i go and like to build my car with all the options i want.
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Old 12-26-2003, 09:15 AM   #1203
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Man, thats some kind of best friend!!!
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Old 12-26-2003, 12:30 PM   #1204
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Quote:
Originally posted by icon
my best friend just bought me an R40 for X mas so its on the way .


nice friend you got !!!

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Old 12-26-2003, 01:25 PM   #1205
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The super chassy, front CF shock towers, alloy threaded shocks, hollow layshafts, alloy hex clamp hubs, and steering bearings are all avaliable to the US so far.

im still waiting for my rear CF towers
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Old 12-26-2003, 01:52 PM   #1206
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I'll be glad when the new upper deck hits the US. Its pretty cool.
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Old 12-27-2003, 12:35 AM   #1207
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Can i use any gearing combination on R40? Today i tried using 18/48 ; 21/43 and the gears doesn't mesh properly
I have mugen clutch on. Could this be the problem?
The higher the number the faster acceleration i get correct??
Thx
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Old 12-27-2003, 08:26 AM   #1208
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Well actually, if its acceleration your after, then a lower 1st gear pinion, or higher first gear spur, is what your after. Either one of those(or a combination of both) will give you better acceleration. If you go higher on you 1st gear pinion, or lower on your 1st gear spur you will lose some acceleration.

As far as the gearing options, I think the guys covered that here long before I actually got my car. But I've always gone with the thought that as long as the difference in tooth count is the same between both pinions and both spurs, then the gear mesh will be fine.

For example: you have and 18/21 on your pinions. Which = 3 tooth difference.

While at the same time, you have 48/43 on your spurs. Which = 5 tooth difference.

As far as I can tell, there is physically no way that your gears would mesh with that combination. Take a look at the stock gearing on the car.

Its-16/19 on the pinions.
And-48/45 on the spurs.

both=3 tooth difference, which is why the stock gearing meshes perfectly.

To get yours to mesh properly, I believe you will need to either drop down to a 16T 1st gear pinion or up to a 23T 1st gear spur. Doing either one of those things(but not both) will get you a 5 tooth difference on both the pinions and spurs and = a perfect gear mesh. Not to mention get you the acceleration your after!

This is a lot of info, but I believe it is all correct.

Hope this helps.
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Old 12-27-2003, 11:31 AM   #1209
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Thanks for the response Darkseid. It sure does help me.

I'm not quite understand when you said "up to 23T 1st gear spur". I looked at the chart, the don't have 23T. BTW thx again.
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Old 12-27-2003, 01:42 PM   #1210
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Sorry about that, that was a mistake in speaking on my part.

If your happy with the 21/43 on your 2nd gear ratio, then just drop down to a 16T 1st gear pinion and stick with your 48T 1st gear spur. That should allow you to get your gear mesh perfect.

Sorry about the mix up!
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Old 12-27-2003, 03:41 PM   #1211
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B & darkseid:

hehehe, yep, that is why he is my best friend. all i need to get is the rest of my stuff like options and new electronic setup. i'm thinking about getting a KO Mars R with full KO digital servos...
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Old 12-27-2003, 05:14 PM   #1212
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Maybe a few people may need a refresher course

Here is the list of spurs and pinions HPI sells for the R40

76947 1 Spur Gear 47 Tooth (1M/1st Gear/2 Speed)

76948 1 Spur Gear 48 Tooth (1M/1st Gear/2 Speed)
R40 kit gear

76949 1 Spur Gear 49 Tooth (1M/1st Gear/2 Speed)

76953 1 Spur Gear 43 Tooth (1M/2nd Gear/2 Speed)

76954 1 Spur Gear 44 Tooth (1M/2nd Gear/2 Speed)

76955 1 Spur Gear 45 Tooth (1M/2ndGear/2 Speed)
R40 kit gear

76956 1 Spur Gear 46 Tooth (1M/2ndGear/2 Speed)

76960 1 Threaded Pinion Gear 15Tx12mm (1M/1st Gear/2 Speed)

76961 1 Threaded Pinion Gear 16Tx12mm (1M/1st Gear/2 Speed)
R40 kit gear

76962 1 Threaded Pinion Gear 17Tx12mm (1M/1st Gear/2 Speed)

76963 1 Threaded Pinion Gear 18Tx12mm (1M/1st Gear/2 Speed)

76968 1 Threaded Pinion Gear 18Tx16mm (1M/2ndGear/2 Speed)

76969 1 Threaded Pinion Gear 19Tx16mm (1M/2ndGear/2 Speed)
R40 kit gear

76970 1 Threaded Pinion Gear 20Tx16mm (1M/2ndGear/2 Speed)

76971 1 Threaded Pinion Gear 21Tx16mm (1M/2ndGear/2 Speed)

As was discussed earlier in this thread, any combination of gears can be used. You just have make sure you use 1st gear pinions with 1st spurs only and 2nd gear pinions with 2nd gear spurs only.

Gear mesh isn't critical. I can't remember the science behind all this but look at the teeth on the spur gear. They are sort-of rounded. I think it's called variable pitch. But anyhow, the spur gears are built to withstand less than perfect gear mesh so you can run any pinion gear. And you shouldn't even have to move the engine. Pretty neat heh??
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Old 12-27-2003, 07:55 PM   #1213
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Quote:
Originally posted by icon
B & darkseid:

hehehe, yep, that is why he is my best friend.


did you get your friend a R-40 equilavent present ??

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Old 12-28-2003, 04:38 AM   #1214
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I wish I had friends like icons
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Old 12-28-2003, 09:05 AM   #1215
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The sleeper: Well I'm certainly in no position to argue. I don't know that much about the R40 and its gearing. My advice to him was based solely on acheiving the perfect gear mesh while still getting the gearing combinations he wants.

I remember the debate on here about the gearing. I never took part in the debate. But me, myself, I still prefer to go with correct gear mesh. And until I see it printed somewhere in HPI's manual that gear mesh doesn't matter, I'll stick with my safe approach. At the most, I would go up or down one tooth on the pinion or spur combo without changing something else to match. But thats about it for me. As far as running "any pinion" and not worrying about gear mesh.....I don't know...

But atleast he has both opinions, he can make up his own mind now.
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