R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road

Reply
 
Thread Tools Search this Thread
Old 11-11-2005, 11:20 PM   #106
Tech Fanatic
 
ogreasurada's Avatar
 
Join Date: May 2005
Location: SZ-China
Posts: 848
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by MRX_joe21
Maybe evolva does...
ogreasurada is offline   Reply With Quote
Old 11-11-2005, 11:33 PM   #107
Tech Adept
 
MRX_joe21's Avatar
 
Join Date: Oct 2005
Location: San Valley Crew
Posts: 189
Send a message via Yahoo to MRX_joe21
Cool

Quote:
Originally Posted by ogreasurada
moron
MRX_joe21 is offline   Reply With Quote
Old 11-11-2005, 11:40 PM   #108
Tech Fanatic
 
ogreasurada's Avatar
 
Join Date: May 2005
Location: SZ-China
Posts: 848
Trader Rating: 1 (100%+)
Default

Please excuse my idiocity since my brain does not carry enough detail about the Evolva or MRX since I only have a 950. I was thinking that most of these cars today would mostly have the same features but the matter of design and style.
ogreasurada is offline   Reply With Quote
Old 11-12-2005, 12:02 AM   #109
Tech Adept
 
MRX_joe21's Avatar
 
Join Date: Oct 2005
Location: San Valley Crew
Posts: 189
Send a message via Yahoo to MRX_joe21
Default

This is what you can learn (it does apply to 1/8th):

Physical Forces and Setup - Theory and Practice_by James Hughes

"Steering Geometry
The steering geometry can be regarded at the movement and displacement of the front wheels as the steering wheel is turned. This movement is quite complex, and involves a number of different settings. There is one thing in common though, and that is the reason why we need a complicated geometry - We MUST lift the inside wheel while cornering.
The inside wheel lift is what enables a kart to go round a corner without using a differential.
Because of this lack of a differential, a karts natural direction of travel, forwards, is very difficult to change. This is down to the differing radii of turn experienced by the inner and outer rear wheels while turning a corner. The inside wheel is actually travelling a shorter distance than the outside, so therefor is needs to take fewer revolutions to go round the corner. However, the two rear wheels are attached by a solid axle, and must therefor move together, so in order to turn, one of the wheels need to skid over the track surface. In a car, the differential will allow the wheels to turn at different rates, without this skidding action.
This skidding action, or indeed the lack of it, is what make a stationary kart so difficult to turn round - you have to overcome the grip of one of the tyres, and with the sticky tyres used in many kart classes this can expend a lot of energy.
This is the reason for lifting the inside wheel and it effectively turns the kart into a tricycle during the cornering process! The steering geometry causes the inner rear wheel to lift off the ground while cornering, which means the wheel can rotate faster than it is passing over the ground. The rear inner wheel is no longer touching the track, and we therefor no longer need to overcome the grip from that tyre in order to turn.
In fact, depending on the power of the engine, we may be able to allow some scrub. For example, while a Prokart may need to entirely lift the inner wheel, because it does not have enough power to overcome the scrub, a more powerful kart may have power to spare in the corner, meaning that the power loss to scrub can be overcome. However, any scrub will start to cause understeer when entering a corner, so even though the engine may be powerful, it may still be necessary to completely lift the inner rear to maintain decent handling."
MRX_joe21 is offline   Reply With Quote
Old 11-12-2005, 06:49 AM   #110
Tech Master
 
Join Date: Aug 2004
Location: Sunnyvale, Ca
Posts: 1,293
Default Belts and Karting

Quote:
Originally Posted by ogreasurada
Just wondering why fron belt tensioner is needed when you can adjust from the eccenters.

The Evolva, 2005, does have eccentrics. They keep the belt tight - but our tensioner forces the belt around the lay pulley creating more contact area.. The eccentrics will help stop belts from braking - the tensioner keeps the belt front stipping teeth. I hope that makes sense.

The artical on karting is very good. He has written more than I originally posted - do s search by title and author - he is from the UK.
Rich Browne is offline   Reply With Quote
Old 11-12-2005, 08:06 AM   #111
Tech Master
 
Join Date: Aug 2004
Location: Sunnyvale, Ca
Posts: 1,293
Default

Quote:
Originally Posted by rc racing dude
Rich , Yes it does help. Can you tell me if 450.00 is a good price on a 1005 C/R
(RODY MOD) Thanks, Mike

$450 is a good price. Remember that is a seven port motor with no ceramic bearing. It is a very solid Regional/advanced club motor.

I haven't heard it refered to as a C/R. May I ask, who/where did you hear about this motor?

A comment, in seven, hour long mains - we finished each one no lower than Second (Scott Kimbrows, RB powered, White Lightning fueled, Kyosho Evolva) That was done in a 10 month period - not including any club races.
Rich Browne is offline   Reply With Quote
Old 11-12-2005, 10:26 AM   #112
Tech Adept
 
MRX_joe21's Avatar
 
Join Date: Oct 2005
Location: San Valley Crew
Posts: 189
Send a message via Yahoo to MRX_joe21
Default

Quote:
Originally Posted by Rich Browne
The Evolva, 2005, does have eccentrics. They keep the belt tight - but our tensioner forces the belt around the lay pulley creating more contact area.. The eccentrics will help stop belts from braking - the tensioner keeps the belt front stipping teeth. I hope that makes sense.

The artical on karting is very good. He has written more than I originally posted - do s search by title and author - he is from the UK.
Do you make belt tensioner for MRX too?
MRX_joe21 is offline   Reply With Quote
Old 11-12-2005, 10:47 AM   #113
Tech Master
 
Join Date: Aug 2004
Location: Sunnyvale, Ca
Posts: 1,293
Default

Quote:
Originally Posted by MRX_joe21
Do you make belt tensioner for MRX too?
The only crossover part is the front body mount - it doesn't break! We are considering a tensioner for the MRX-4.

Rich
Rich Browne is offline   Reply With Quote
Old 11-12-2005, 10:50 AM   #114
Tech Adept
 
Join Date: Jul 2005
Posts: 204
Default

Quote:
Originally Posted by Rich Browne
$450 is a good price. Remember that is a seven port motor with no ceramic bearing. It is a very solid Regional/advanced club motor.

I haven't heard it refered to as a C/R. May I ask, who/where did you hear about this motor?

A comment, in seven, hour long mains - we finished each one no lower than Second (Scott Kimbrows, RB powered, White Lightning fueled, Kyosho Evolva) That was done in a 10 month period - not including any club races.

Rich, The motor is listed on ebay with the condition as new in the box. The C/R is on the label of the box. Souds like I might have to pay a little more $$ to get the motor like Scott is using. I have heard nothing but great things about the C5 1005 RC motors and would like to try one. Where can I find A fair deal on this motor?
rc racing dude is offline   Reply With Quote
Old 11-12-2005, 01:48 PM   #115
Tech Master
 
Join Date: Aug 2004
Location: Sunnyvale, Ca
Posts: 1,293
Default

Quote:
Originally Posted by rc racing dude
Rich, The motor is listed on ebay with the condition as new in the box. The C/R is on the label of the box. Souds like I might have to pay a little more $$ to get the motor like Scott is using. I have heard nothing but great things about the C5 1005 RC motors and would like to try one. Where can I find A fair deal on this motor?

Ace Hardware Hobbies is your best U.S. choice 800-383-2657 ask for "dremel-Boy" AKA Kevin
Rich Browne is offline   Reply With Quote
Old 11-12-2005, 02:12 PM   #116
Tech Champion
 
GMartinez's Avatar
 
Join Date: Dec 2004
Location: Sunshine State
Posts: 8,161
Trader Rating: 85 (100%+)
Default

From past experience with Rb motors they tend to have air leaks.
seal the carb & backplate if you experience the same other than that awesome power especially if it is a rody version
__________________
www.fullthrottlercraceway.com
Home of The U.S. World Nitro Cup 2013,2014,2015,2016
2014 Roar Electric Nationals, IFMAR ISTC Worlds, 2015 Roar Fuel Nationals
2017 U.S.World Nitro Cup Nov 29th - Dec 3rd
U.S.Open Fuel Championship Returning soon
GMartinez is offline   Reply With Quote
Old 11-12-2005, 02:27 PM   #117
Tech Master
 
Join Date: Aug 2004
Location: Sunnyvale, Ca
Posts: 1,293
Default

Quote:
Originally Posted by 710baby
From past experience with Rb motors they tend to have air leaks.
seal the carb & backplate if you experience the same other than that awesome power especially if it is a rody version

The current RB's don't have any air leaks. No reason to use any sealents.
Rich Browne is offline   Reply With Quote
Old 11-12-2005, 03:22 PM   #118
Tech Adept
 
MRX_joe21's Avatar
 
Join Date: Oct 2005
Location: San Valley Crew
Posts: 189
Send a message via Yahoo to MRX_joe21
Default

Quote:
Originally Posted by Rich Browne
The only crossover part is the front body mount - it doesn't break! We are considering a tensioner for the MRX-4.

Rich
Thankz..
MRX_joe21 is offline   Reply With Quote
Old 11-13-2005, 01:26 PM   #119
Tech Adept
 
Join Date: Jul 2005
Posts: 204
Default

Quote:
Originally Posted by Rich Browne
Ace Hardware Hobbies is your best U.S. choice 800-383-2657 ask for "dremel-Boy" AKA Kevin

ThanKs Rich, I will give him a call next week,looks like I can also stock up on some extra option parts for my 05 evolva. Can you please tell me what method you use for motor break-in and do you change the the rod after break-in or go through about 1 gallon of fuel first, then check rod for replacement. Thanks again, Mike
rc racing dude is offline   Reply With Quote
Old 11-13-2005, 03:56 PM   #120
Tech Master
 
Join Date: Aug 2004
Location: Sunnyvale, Ca
Posts: 1,293
Default RB Motor

Hi Mike,

We replace rods every 1.25 gallons. No need to change your rod after break in - unless you hydrolock or something odd like that. The following URL is Rody's break-in procedures: http://tinyurl.com/bk43j

Good luck with the motor. Let me know if I can help when you have it running. We gear the motor very low and spin it up pretty high. The pipe and header is very important to end use. Good luck!

Rich
Rich Browne is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTS: Kyosho Evolva 2005 GT Racer R/C Items: For Sale/Trade 1 11-06-2006 06:45 PM
Kyosho Evolva 2005. RcXtion Malaysian R/C Racers 32 09-20-2006 10:47 AM
Kyosho Evolva 2005 kit $250.00 skriete R/C Items: For Sale/Trade 3 07-25-2006 01:18 PM
2005 Kyosho Evolva New in Box ATOMIC R/C Items: For Sale/Trade 0 05-01-2006 09:07 PM
New in Box 2005 Kyosho Evolva $550.00 ATOMIC R/C Items: For Sale/Trade 5 04-30-2006 09:57 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 01:39 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net