Welcome to the North American Subaru Impreza Owners Club Saturday April 18, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Classifieds > Private 'For Sale' Classifieds > Non-Subaru Stuff

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 10-20-2007, 05:14 PM   #1
remowgn
Scooby Specialist
Member Sales Rating: (6)
 
Member#: 41149
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Orange, CA
Vehicle:
04 09 FXT
SSM

Default HPI RS4 Nitro gas-powered RC car- everything included!!

Alrighty... this thing was my hobby for quite a while, and thus I collected quite the set of parts for it. It's a lot of fun to drive around and tune. I had never really been into RC stuff before I got this car, and it got me hooked! Here are the details:

HPI RS4 Nitro (bought as RTR- ready to run)
- 0.15 motor (stock), plus a spare
- 27mhz radio
- glow plug igniter

Upgrades:
- race clutch
- lightweight flywheel
- rear belt tensioner
- front belt tensioner
- tuned pipe exhaust
- high-flow cleanable air filter
- carbon top plate chassis brace
- servo cover

Three bodies are included- R34 skyline, SARD Supra, and a Viper ACR body. There is also a fuel bottle and some other little miscelaneous bits, like extra glow plugs

This thing is great fun, and the package is everything you need to get started except for fuel. The batteries in both the transmitter and receiver are still good too! I am asking $180 OBO for the whole package... what you see here represents about $500-600 at least, and it has had VERY little use. Everything is still in excellent condition, and it won't need any new parts for quite a while. Pics below!





* Registered users of the site do not see these ads.
remowgn is offline   Reply With Quote
Old 10-21-2007, 02:13 PM   #2
remowgn
Scooby Specialist
Member Sales Rating: (6)
 
Member#: 41149
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Orange, CA
Vehicle:
04 09 FXT
SSM

Default

bump!
remowgn is offline   Reply With Quote
Old 10-21-2007, 03:10 PM   #3
dankEe
Scooby Specialist
Member Sales Rating: (13)
 
Member#: 97958
Join Date: Oct 2005
Chapter/Region: Tri-State
Location: NYC // FAIRFAX
Vehicle:
2002 WRX
ASPEN

Default

this is the older older model... everything is belt driven, the new ones are all driveshaft driven...

if your interested 100 shipped..
considering a used rs4 kit is only 200
- Danny
dankEe is offline   Reply With Quote
Old 10-21-2007, 04:02 PM   #4
remowgn
Scooby Specialist
Member Sales Rating: (6)
 
Member#: 41149
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Orange, CA
Vehicle:
04 09 FXT
SSM

Default

Quote:
Originally Posted by dankEe View Post
this is the older older model... everything is belt driven, the new ones are all driveshaft driven...

if your interested 100 shipped..
considering a used rs4 kit is only 200
- Danny
The shaft drive makes little difference in how the car drives or performs... the only place it really matters is if you're trying to drive the car competetively, which this car was never intended to do. You'd have to spend a LOT of money to get to that point anyway. With the tensioners, there is no "slack" in the drivetrain, the belts rarely break, and the performance difference is negiligible. Shaft drives have the potential to be more direct, but they also put more stress on the drivetrain, causing other parts to break sooner. On top of that, parts like diffs etc are readily available and cheaper for the belt drive system.

There are also a lot of extras included here, so I believe my price is fair. The tuned pipe, header, extra motor, tensioners, clutch, carbon top plate, 3 extra bodies, etc etc make my price more than fair. There's a lot more here than a "used kit".


For anyone that would like a bit more reading on the shaft vs. belt drive controversy, here is a great article on the merits vs downsides of both drivetrains.

Quote:
The Need for transmission and its affects
The need for transmission is pretty obvious, power has to be got from the motor and transferred to the wheels. The use of any type of transmission has effects on other parts of the car, these being the position of batteries, motor and to some degree the suspension.


Now following on from this, is the first factor affecting the cars balance. The positioning and orientation of the motor. On a shaft drive car of any sort, the motor is positioned in a north-south configuration (90 degrees to the wheels) and this leads to a torque steer problem. The counter torque from the fast spinning armature will cause more pressure to be applied to the wheels on the opposing side, thus the car is likely to steer better in one direction over the other.


This sounds complicated but its easy to explain with an example. Helicopters suffer from counter torque, the rotor blades spin one way and want to rotate the helicopter body in the opposing direction, the job of the tail rotor is to stop this from happening.


In order to reduce the affects of torque steer, the associated tc3 has asymmetrical front steering geometry. There is slightly more lock and caster on one side over the other. Statically the car looks as though the steering is out but dynamically (so they say) the car will have even cornering in either direction.


The motors on belt drive cars are typically east-west configuration with the shaft rotating in the opposing direction to the wheels. When the car is accelerating the counter torque is transferring weight away from the back wheels and over to the front, which will give the car better steering during acceleration. When the car is braking, the counter torque transfers weight towards the back of the car reducing dive. This leads to less oversteer while braking. Having the spur gear situated above the pinion (eg. X ray, HPI Pro 2,3) also allows the motor to be situated virtually in the centre of the car which is very much desirable.



Inefficiencies

There has been a whole raft of threads from uneducated idiots who state that shaft transmission is more efficient at speed X than a belt at speed Z The reality is they are both inefficient but for very different reasons.


The first point of inefficiency in a shaft drive car is the differential. At this point the drive is rotated through 90 degrees. Comparatively in a belt driven car the drive is in the same direction as the wheels. The transmission runs parallel to the direction of travel.


The second point of inefficiency is the where the prop shaft (big long shaft in the middle of the car) meets the differentials. The teeth tend to have a big contact patch which increases friction but is necessary to transmit the torque. This is where most of the noise in a shaft drive car comes from.


In a belt driven car there is only one factor that causes inefficiency. That factor being the belts! As speed increases a few things happen, firstly the belts will find their natural frequency and start resonating (vibrating up and down), thus expending power that could be at the wheels.


As speed increases further, the belt tension increases and the growing rotational (centrifugal) forces try to pull the belt away from the pulleys which reduces the contact patch between the two and more power is lost. This is why belts stretch!



The single belt drive problem

This is where I am going to divide belt drives into two distinct categories, single belt drive and double belt drive. Single belt drive cars (Losi XXX-s) have one major obstacle to overcome, that being the belt tension, too little tension and the belts will skip, too much tension and the belts will stretch very quickly and again skip.


So the tensioning device becomes absolutely critical and this is where the inefficiency in arises. The addition of a belt tensioner that adds significant tension to the belt (not just reducing the slop) is highly undesirable but unfortunately unavoidable.



Conclusion and other stuff

If you’ve read all the way through that you should head down to McDonalds and reward yourself! On a serious note, its pretty obvious that each type of transmission has its advantages and disadvantages.


On a personal note I think that the execution of the transmission design is more important than what type it is. By that I mean the quality of the bearings, the teeth design etc are very much more important than the type of transmission it is.
http://www.rczone.net/modules.php?na...rder=0&sid=372
remowgn is offline   Reply With Quote
Old 10-22-2007, 12:02 PM   #5
remowgn
Scooby Specialist
Member Sales Rating: (6)
 
Member#: 41149
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Orange, CA
Vehicle:
04 09 FXT
SSM

Default

Bump!
remowgn is offline   Reply With Quote
Old 10-22-2007, 04:16 PM   #6
caseyfoster
Scooby Newbie
Member Sales Rating: (1)
 
Member#: 141100
Join Date: Feb 2007
Chapter/Region: South East
Location: Atlanta
Vehicle:
2013 WRX
Satin White Pearl

Default

Damn good price, i use to race serpents. You will not be able to find a RTR package for less then 200 anywhere. freebump
caseyfoster is offline   Reply With Quote
Old 10-23-2007, 07:49 PM   #7
remowgn
Scooby Specialist
Member Sales Rating: (6)
 
Member#: 41149
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Orange, CA
Vehicle:
04 09 FXT
SSM

Default

vroom vroom! thanks for the bump!
remowgn is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTT, WTS, HPI RS4 Nitro Mini and lots of spares Cade01 NWIC Private Classifieds 24 11-24-2007 01:24 AM
RC10GT Gas powered RC Car Hayaboosted Non-Subaru Stuff 9 04-22-2007 10:53 PM
Subaru WRC Gas Powered RC Car, CF Defi Pod, Shift Light 9vapors Private 'For Sale' Classifieds 9 07-06-2006 10:03 PM
RS42 Nitro gas powered RC car (55 mph) WorldRallyXtream Private 'For Sale' Classifieds 6 07-21-2005 01:11 AM
R/C Car - HPI RS4 Nitro Racer 2 eingram Southern California Impreza Club Forum -- SCIC 3 02-08-2003 05:08 PM


All times are GMT -4. The time now is 09:48 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.