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Old 01-27-2015, 11:47 AM   #3316
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I have my 21 turn Speed Passion setup from my F103 installed, it's clearly under-geared.

I used the biggest pinion on my 48p collection, which is 24 teeth. Anyone run higher tooth count or smaller spur?
It was a 26 tooth, kicked it up to 32 after reading standard is 30. Thinking lower turn motor. The 21.5 can go to the M05.
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Old 02-13-2015, 07:11 PM   #3317
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Default Cup Racer Fan

Hi all try this for you lipo to fit. Remove both battery cups you can do a little filling on the front stop some and the motor mount for a good fit but not necessary. One in pic's is no filled just tape it in.
Attached Thumbnails
HPI Cup Racer 1M-dsc04782.jpg   HPI Cup Racer 1M-dsc04780.jpg   HPI Cup Racer 1M-dsc04781.jpg   HPI Cup Racer 1M-dsc04784.jpg   HPI Cup Racer 1M-dsc04785.jpg  

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Old 03-23-2015, 12:42 PM   #3318
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Originally Posted by Anorak View Post
Hello!

Im a Cup Racer enthusiast from Norway. I'v found that also the 3racing 48 pitch spur gear fits the cup racer. They have the range from below 60t to way over 70t. The spur gears is a little bit slimmer than the original but they fit on the hub nicely. How durable they are i do not know, have had three packs through a 68t and it holds up fine. Just a heads up.
Hi, I am Greek enthusiast and bought a brand new cup racer last Christmas. I had a problem when I was fitted the genuine spur gear so it broke. And tried to find a similar one. I bought a 3racing 48pitch 65t and 2 kimbrough one 48p 66t and one 48p 69t . Kimbrough are exactly the same with the genuine better than 3racing. Now I'm running with the 69t kimbrough that fits perfect and with a brushless yuki sl3560 motor without any problem for a month .very durables! You can provide them from hobbyking.com for 5$ Each
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Old 03-23-2015, 12:57 PM   #3319
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As a new member here are two photos of my chassis and my favorite 1973 Porsche rsr.HPI Cup Racer 1M-image.jpg
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Old 03-23-2015, 01:00 PM   #3320
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HPI Cup Racer 1M-image.jpg
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Old 03-23-2015, 02:15 PM   #3321
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Nice CR!

I sold one of mine that was NIB, still have another that is in 100% perfect ...it's a shelf queen for the most part. ...yet I have been thinking of selling it to fund a new project?
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Old 05-27-2015, 02:37 PM   #3322
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...and I sold it.

I have sold all my Cup Racers ...they are good cars, but decided to only keep what I race.
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Old 08-11-2015, 05:09 PM   #3323
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anyone know if an ESC designed for a 1/16 or "smaller size" RCs would work at powering a Cup Racer?

I have one that is a 1-off CS Drifter and I need a cheap ESC. Id rather not sacrifice a 1/10th scale ESC if I can help it, though I will if I need to.


Just curious. I have a sensorless Reedy 3500KV in it now, just need an ESC to pair with it.



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Old 08-12-2015, 02:15 PM   #3324
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it's not so much about the car, as it is about the ESC and motor your using and if they are compatible.

Will the 1/16th scale ESC power your 550sized motor, -is that the question?
I believe that that 3500KV Assosciated is a 550 sized motor, yes?

Ideally you'd want a 540sized motor in that CR'r. And ideally you'd want an ESC that is made to power that 540sized motor ...I have not tried using an ESC for 1/16th scale purposes to power a 1/10th or larger scale motor. My hunch is that it will not work. For one, I think most 1/16th ESC's use smaller batteries, not the larger batteries used for 1/10th scale ESC's ...i think that will be an issue.

I'd personally try to get a 1/10th scale ESC for that motor ...otheriwse you may be out more money if you end up frying what you currently have.
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Old 09-07-2015, 09:03 AM   #3325
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Got a HobbyWing XeRun Juststock the other day, wired up to my torquey 21.5T ReedySonic which I had no luck getting smooth performance out of my Novak GTB3 nor TBLE02-S.

But with the HobbyWing ESC on this chassis with 35 degree timing, runs very smooth and quick with the 30 teeth pinion.

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Old 09-19-2015, 03:54 AM   #3326
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After a cup racer for my son. If anyone has a NIB or one in very good condition can you please message me.

Cheers.
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Old 09-19-2015, 06:17 AM   #3327
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Quote:
Originally Posted by sakadachi View Post
Got a HobbyWing XeRun Juststock the other day, wired up to my torquey 21.5T ReedySonic which I had no luck getting smooth performance out of my Novak GTB3 nor TBLE02-S.

But with the HobbyWing ESC on this chassis with 35 degree timing, runs very smooth and quick with the 30 teeth pinion.

I'm sort of regretting that I gave my cup racer away.

That's a nice CR Sak.
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Old 12-03-2015, 08:29 AM   #3328
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My Cup Racer ate a spur, finally replaced it then found the hub cup wobbles a lot...enough to cause the spur to rub on the top plate, gear guard scews, etc. (I have a suspicion the wobbling is what caused the spur to get jammed & damaged.)

Is it unusual that the rear gearbox input shaft bearing can move in the housing?

The replacement is an Associated spur. It seems to be 2mm or so too thick. What's everyone using these days?

I haven't found a vendor with the stock spur available... I'd like to buy one.
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Old 12-03-2015, 10:26 AM   #3329
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Quote:
Is it unusual that the rear gearbox input shaft bearing can move in the housing?
it shouldn't move, the bearing should sit snug.
...is it possible that the plastic around the bearing (on the gearbox) has warped-been destroyed since you mentioned you had issue w/ a spur being eaten. Maybe this is causing the bearing to not be seated correctly?
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Old 12-03-2015, 05:42 PM   #3330
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Originally Posted by eR1c View Post
it shouldn't move, the bearing should sit snug.
...is it possible that the plastic around the bearing (on the gearbox) has warped-been destroyed since you mentioned you had issue w/ a spur being eaten. Maybe this is causing the bearing to not be seated correctly?
The thought had crossed my mind (though I wouldn't know any better as I bought the car secondhand... i.e. didn't assemble it).

Thank you, helpful response always eR1c
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