RCU Forums

RCU Forums (http://www.rcuniverse.com/forum/)
-   RC Electric On-Road vehicles, race cars and more (http://www.rcuniverse.com/forum/rc-electric-road-vehicles-race-cars-more-475/)
-   -   sprint 2 pulley melting (http://www.rcuniverse.com/forum/rc-electric-road-vehicles-race-cars-more-475/11120866-sprint-2-pulley-melting.html)

HomieOC 06-16-2012 11:00 PM

sprint 2 pulley melting
 
so the rear belt goes around this pulley http://www.hpiracing.com/products/en/85016/

i put brand new one in and the ridges are gone... totally after 5 mins of running it. im not talking about the belt im talking about the pulley ridges getting shredded

Foxy 06-17-2012 01:35 AM

RE: sprint 2 pulley melting
 
Does the pulley move freely, how are the bearings on the pulley shaft, have you changed the belt or front pulley at all?

Car-Tune 06-17-2012 07:32 PM

RE: sprint 2 pulley melting
 
I never had a problem till not too long ago. I replaced my tear belt and not too many runs after its stripped. The teeth on the belt are gone. I've see a guy in here complaining that his belt kept breaking. What I'm gonna do is call HPI, the normally replace these parts easy do I recommend you give it a try too.

I hunk that HPI is getting cheap material.

Foxy 06-17-2012 11:08 PM

RE: sprint 2 pulley melting
 
The guy whose belt kept breaking does not have the same problem the op does, and this car is not known for having either of those problems to my knowledge (teeth getting eaten, or breaking belts for no reason). It may have just been a sub standard part as you say, but I suspect it may be something else. Belt and pulley drive is the strongest type of drivetrain, if you stripped teeth and belts, you would have done much worse to spur gears. I can't help wondering if something is out of alignment or not fitted correctly. Check everything thoroghly especially the belt tensioner and the area around the pulley that stripped. Check for bent shafts in the pulley system, check everything.

Car-Tune 06-24-2012 07:39 PM

RE: sprint 2 pulley melting
 
I just now ran into that problem. After many many runs. Time to replace with aluminum.

HomieOC 06-24-2012 09:52 PM

RE: sprint 2 pulley melting
 

Quote:

ORIGINAL: Car-Boy

I just now ran into that problem. After many many runs. Time to replace with aluminum.
where do i get aluminum ?its not on replacement part on hpi


Car-Tune 06-25-2012 04:29 AM

RE: sprint 2 pulley melting
 
No it's not. But when I do find them again I will let you know.

Car-Tune 07-07-2012 08:12 PM

RE: sprint 2 pulley melting
 
I really need to fInd some aluminum pulleys. My pulleys have been worn out by the belt. I tried locating some HPI car parts that might be able to replace it but no luck.

WindyCitySquirrel 07-20-2012 03:57 AM

RE: sprint 2 pulley melting
 
The rear belt system on the S2 uses eccentrics built into the main shaft bearing holders - there are only 3 positions for the eccentrics cut into the motor mounts AND if you move the eccentricsto tighten the rear belt - you loosen the front belt - the front belt tensioner does NOT have enough travel to compensate - this system does not provide (IMO) a desireable rear belt tension.

Use a rear belt mod -replace the main shaft pulleys and the diff pulleys if the teeth are worn or torn, otherwise you will eat belts.

The main shaft has about .020" end play - shim it.

I have a rear belt mod on mine as well as a front belt travel mod & a shimmed main shaft- -- 13ish x 20 minuteruns (I use a LiPo) andvirtually no beltwearandNOteeth wear on any pulleys.

But I stay away from rocks -

Stay away from rocks - rocks get caught in the belts and jammed up resulting in worn / torn belts & worn / torn pulley teeth.


digitalsmithy 07-23-2012 06:53 PM

RE: sprint 2 pulley melting
 
If you find alum pulley's please update:) btw squirrel do you race in Chi? doesn't seem like there is anywhere to go out here...

Car-Tune 07-23-2012 06:58 PM

RE: sprint 2 pulley melting
 
I havent tried these but am planning too

http://www3.towerhobbies.com/cgi-bin...VSEARCH=lxlr76

http://www3.towerhobbies.com/cgi-bin...VSEARCH=lxwb72

digitalsmithy 07-23-2012 07:54 PM

RE: sprint 2 pulley melting
 
ooh the traxxas ones look pretty dang close, they seem like they could be slightly wide, but that might just be me, def give 'em a shot!

WindyCitySquirrel 07-24-2012 04:24 AM

RE: sprint 2 pulley melting
 



Quote:

ORIGINAL: digitalsmithy

btw squirrel do you race in Chi? doesn't seem like there is anywhere to go out here...
I don't drift
</p>

digitalsmithy 07-24-2012 07:33 AM

RE: sprint 2 pulley melting
 


digitalsmithy 07-24-2012 07:36 AM

RE: sprint 2 pulley melting
 

Quote:

ORIGINAL: WindyCitySquirrel


Quote:

ORIGINAL: digitalsmithy

btw squirrel do you race in Chi? doesn't seem like there is anywhere to go out here...

Hey,smithy -
I will be soon... soon as my S2 is ready.
I still need a Novak #3339 Brushless System for the type of racing I'll be doing, get at least two more LiPos, some other odds &amp; ends and tighen the slop in the C hub flange pipes.

What type of racing are you considering?


For that sliding sideways stuff try here for some info-




thanks for the info squirrel i'm interested in any type of the racing, i'm new to all this and didn't think there was anything out here, definately check them out:)


WindyCitySquirrel 07-24-2012 11:09 AM

RE: sprint 2 pulley melting
 


Smithy, it looks like that master link didn't work -


Try these manually for sliders:

http://www.rctech.net/forum/electric...ft-thread.html</p>

http://www.rctech.net/forum/electric...-drifters.html</p>

http://www.rctech.net/forum/electric...n-chicago.html</p>

digitalsmithy 07-24-2012 12:47 PM

RE: sprint 2 pulley melting
 
thanks!

Car-Tune 07-29-2012 01:01 PM

RE: sprint 2 pulley melting
 
I have ordered the traxxas 15t aluminum pulley. Don't know if it will work but I will give it a try as soon as I receive it and will notify to everyone if it works or fits correctly.

digitalsmithy 07-29-2012 02:49 PM

RE: sprint 2 pulley melting
 

Quote:

ORIGINAL: Car-Boy

I have ordered the traxxas 15t aluminum pulley. Don't know if it will work but I will give it a try as soon as I receive it and will notify to everyone if it works or fits correctly.

looking forward to the update, i lterally just got a rock stuck in mine and shaved off a couple teeth but it's still going, hope this works...

Car-Tune 07-29-2012 03:13 PM

RE: sprint 2 pulley melting
 
The bad news....

It's on back order.

digitalsmithy 07-29-2012 06:59 PM

RE: sprint 2 pulley melting
 
dang. no where else to get it?

lee-cee 08-21-2012 04:01 AM

RE: sprint 2 pulley melting
 


here are the hpi aluminim 15t center pulley's..... http://www.thefind.com/family/browse-hpi-pulley .....GPM also do them.</p>


All times are GMT -8. The time now is 10:18 AM.