R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 05-19-2011, 12:30 PM   #1921
Tech Apprentice
 
Join Date: Apr 2011
Location: Denmark
Posts: 63
Default

Quote:
Originally Posted by Brokin Racing View Post
If you go to gearchart.com you'll be able to imput you data & find fdr, rollouts etc & print them out for later....Or if you're at the track you can use this formula

Spur divided by pinion multiplied by internal ratio which gives you FDR, then divide this figure into 197.8 & that will give you your rollout (within a pooftenth)

Try & balance spur/pinion sizes so that you're pinion isn't too big
Hi Brokin,

I've just ordered a new set of 20T spur pulleys to decrease the internal ratio to 1.9.

I've also ordered new 66T/48P and 68T/48P spur gears as well as bunch of 48P pinion gears, ranging from 30T to 36T

This should get me near the 3.500 FDR that I'm aiming for.

I'll start with the smallest pinion and work my way up as I get better at keeping the car on the track at the new speeds I'll be able to achieve ;-).

Really appreciate the help BTW.
__________________
Xray T2'008 - Robitronic 13.5 Turn Brushless - Excelorin ESC
Losi XXX-S - Traxxas (550 can) 12 Turn Brushed - GM V3r ECS
Traxxas Rustler - Arrowind 13 Turn Brushless - Arrowind ESC
Losi Mini Desert Truck - Reedy 19 Turn Brushed - Traxxas XL-5 ESC
Losi Aftershock - Hobbyking 1550 1/8 Brushless - Trackstar 150A ESC
Coach-Z is offline   Reply With Quote
Old 05-19-2011, 02:47 PM   #1922
Tech Master
 
Brokin Racing's Avatar
R/C Tech Elite Subscriber
 
Join Date: Nov 2008
Location: Sydney Australia
Posts: 1,281
Trader Rating: 68 (100%+)
Default

Quote:
Originally Posted by Coach-Z View Post
Hi Brokin,

I've just ordered a new set of 20T spur pulleys to decrease the internal ratio to 1.9.

I've also ordered new 66T/48P and 68T/48P spur gears as well as bunch of 48P pinion gears, ranging from 30T to 36T

This should get me near the 3.500 FDR that I'm aiming for.

I'll start with the smallest pinion and work my way up as I get better at keeping the car on the track at the new speeds I'll be able to achieve ;-).

Really appreciate the help BTW.
Excellent, smart way to go about it, work your way up to speed...don't forget, you can never do enough testing

Always a pleasure to help
__________________
Xray - LRP - PF - Futaba -
"Retired from Racing"
Brokin Racing is offline   Reply With Quote
Old 05-22-2011, 09:43 AM   #1923
Tech Apprentice
 
Join Date: Apr 2011
Location: Denmark
Posts: 63
Default

Quote:
Originally Posted by Brokin Racing View Post
Excellent, smart way to go about it, work your way up to speed...don't forget, you can never do enough testing

Always a pleasure to help
The gears and pulleys has arrived... Unfortunately the pulley is to big for my standard belts.


I've tried to adjust the belt tensioner to make it as loose as possible, but it is still not enough.

I guess I need new larger belts. Do you know which belts I need for a 38/20 pulley combination?

If you could add a link to a place that sells them, that would be much appreciated.




All is not a loss though, I've put in the new 68T spur gear, which smaller size has allowed med to add a 33T pinion, for starters...

Ive tried to figure out the difference in speed between the new an old gearing, using gearchart.com, but I can't figure out what the rpm of my 13.5 turn Robitronic motor is.

Here's a link to the specs of the motor:
http://www.robitronic.com/files/manu...nformation.pdf

As far as I can tell by the pdf file, it says it has an RPM of 3.100, but that can't be right???

Haven't tested it on the track yet, but will try and go out tomorrow.
__________________
Xray T2'008 - Robitronic 13.5 Turn Brushless - Excelorin ESC
Losi XXX-S - Traxxas (550 can) 12 Turn Brushed - GM V3r ECS
Traxxas Rustler - Arrowind 13 Turn Brushless - Arrowind ESC
Losi Mini Desert Truck - Reedy 19 Turn Brushed - Traxxas XL-5 ESC
Losi Aftershock - Hobbyking 1550 1/8 Brushless - Trackstar 150A ESC
Coach-Z is offline   Reply With Quote
Old 05-22-2011, 02:18 PM   #1924
Tech Master
 
Brokin Racing's Avatar
R/C Tech Elite Subscriber
 
Join Date: Nov 2008
Location: Sydney Australia
Posts: 1,281
Trader Rating: 68 (100%+)
Smile

A Main Hobbies - [email protected]
1-800-705-2215 (Toll-Free) 1-530-894-0797 (Int'l & Local) 1-530-894-9049 (Fax)
http://www.amainhobbies.com
Twitter: twitter.com/amainhobbies Facebook - facebook.com/amainhobbies

You can get all your Xray gear here

Start at 30 rollout & check your temp's every 2mins...just gear up till you reach acceptable temp level for your motor & track conditions
__________________
Xray - LRP - PF - Futaba -
"Retired from Racing"
Brokin Racing is offline   Reply With Quote
Old 05-27-2011, 08:41 AM   #1925
Tech Master
 
Brokin Racing's Avatar
R/C Tech Elite Subscriber
 
Join Date: Nov 2008
Location: Sydney Australia
Posts: 1,281
Trader Rating: 68 (100%+)
Default

.
__________________
Xray - LRP - PF - Futaba -
"Retired from Racing"
Brokin Racing is offline   Reply With Quote
Old 05-28-2011, 01:13 AM   #1926
Tech Master
 
Brokin Racing's Avatar
R/C Tech Elite Subscriber
 
Join Date: Nov 2008
Location: Sydney Australia
Posts: 1,281
Trader Rating: 68 (100%+)
Default

I ran a recently rebuilt 008 at a club meet last night

It was a 21.5 I entered in stock, ( new 17.5 motor hadn't arrived as yet) at one stage q'd 10th out of 19 but that wasn't the important bit

This 08, with many little extras is the best Xray I've run in my 4 short years of racing & I had them all from FK05 up to T3 2011

Begs the question, why buy a new car, put the effort into getting a car exactly right & do continual improvements
__________________
Xray - LRP - PF - Futaba -
"Retired from Racing"
Brokin Racing is offline   Reply With Quote
Old 05-28-2011, 04:13 AM   #1927
Tech Apprentice
 
Join Date: Apr 2011
Location: Denmark
Posts: 63
Default

Quote:
Originally Posted by Brokin Racing View Post
I ran a recently rebuilt 008 at a club meet last night

It was a 21.5 I entered in stock, ( new 17.5 motor hadn't arrived as yet) at one stage q'd 10th out of 19 but that wasn't the important bit

This 08, with many little extras is the best Xray I've run in my 4 short years of racing & I had them all from FK05 up to T3 2011

Begs the question, why buy a new car, put the effort into getting a car exactly right & do continual improvements
Which upgrades would you recommend for the T2'008?
__________________
Xray T2'008 - Robitronic 13.5 Turn Brushless - Excelorin ESC
Losi XXX-S - Traxxas (550 can) 12 Turn Brushed - GM V3r ECS
Traxxas Rustler - Arrowind 13 Turn Brushless - Arrowind ESC
Losi Mini Desert Truck - Reedy 19 Turn Brushed - Traxxas XL-5 ESC
Losi Aftershock - Hobbyking 1550 1/8 Brushless - Trackstar 150A ESC
Coach-Z is offline   Reply With Quote
Old 05-28-2011, 01:21 PM   #1928
Tech Apprentice
 
Join Date: Sep 2009
Posts: 66
Default

Quote:
Originally Posted by Brokin Racing View Post
I ran a recently rebuilt 008 at a club meet last night

It was a 21.5 I entered in stock, ( new 17.5 motor hadn't arrived as yet) at one stage q'd 10th out of 19 but that wasn't the important bit

This 08, with many little extras is the best Xray I've run in my 4 short years of racing & I had them all from FK05 up to T3 2011

Begs the question, why buy a new car, put the effort into getting a car exactly right & do continual improvements
Well, touring cars wear out... You buy a new one because the old one is worn out, eg. the chassis is tweaked, the dampers are bad, small parts are worn out... Of course you can buy a new chassis, new dampers and so on, but you will still get a better car if you buy it completly new.
Besides, a new car will have better handling. Xray launched the T3'11 because it do have better handling, more steering, less tweak when steering etc. than the previos car.
Skynet is offline   Reply With Quote
Old 05-29-2011, 01:05 AM   #1929
Tech Master
 
Brokin Racing's Avatar
R/C Tech Elite Subscriber
 
Join Date: Nov 2008
Location: Sydney Australia
Posts: 1,281
Trader Rating: 68 (100%+)
Default

Quote:
Originally Posted by Coach-Z View Post
Which upgrades would you recommend for the T2'008?
The Following.....
Asphalt top deck or Atomic 2.0mm deck
Schumacher ceramic bearing where they'll fit (cheaper & much better)
T3 Knuckles in x-hard
6deg caster blocks (med)
TRF shocks mounted 2mm foward on front
Alloy lower shock plates
Alloy rear dog bones
HI/2 links at front..L1/2 links at rear
Set up per book then adjust to suit your track...easy once you get a handle on it

Quote:
Originally Posted by Skynet View Post
Well, touring cars wear out... You buy a new one because the old one is worn out, eg. the chassis is tweaked, the dampers are bad, small parts are worn out... Of course you can buy a new chassis, new dampers and so on, but you will still get a better car if you buy it completly new.
The words you are looking for is regular preventive maintainence & unlike some other brands, Xray parts don't end up like a "cock in coat sleeve" quickly

Besides, a new car will have better handling. Xray launched the T3'11 because it do have better handling, more steering, less tweak when steering etc. than the previos car.
The stock race on Friday night featured all the brands, T3 11, 416X, TOP etc & guess what won... a T2 007 (one of our group too!)

I was once like you, consumer thinking, new has too be better, no so!
__________________
Xray - LRP - PF - Futaba -
"Retired from Racing"
Brokin Racing is offline   Reply With Quote
Old 05-29-2011, 12:14 PM   #1930
Tech Apprentice
 
Join Date: Sep 2009
Posts: 66
Default

Quote:
Originally Posted by Brokin Racing View Post

The stock race on Friday night featured all the brands, T3 11, 416X, TOP etc & guess what won... a T2 007 (one of our group too!)

I was once like you, consumer thinking, new has too be better, no so!
Yeah yeah, that depends on what level the racers are at... I'm talking more serious racing, eg. the Snow Bird race: you won't have a T2 007 in the A-main mod there, not even in the C-final, that's for sure

But club racing may work with old cars, it all depends on what level you're at
Skynet is offline   Reply With Quote
Old 05-29-2011, 04:59 PM   #1931
Tech Regular
 
PDR TOO's Avatar
 
Join Date: Mar 2009
Location: Sydney
Posts: 325
Trader Rating: 24 (100%+)
Default

Quote:
Originally Posted by Skynet View Post
Yeah yeah, that depends on what level the racers are at... I'm talking more serious racing, eg. the Snow Bird race: you won't have a T2 007 in the A-main mod there, not even in the C-final, that's for sure

But club racing may work with old cars, it all depends on what level you're at
I agree that the T3 2011 is obviously a great car. It is very popular at my club and everyone who drives one comments on how good it is out of the box. However, If Iím not mistaken this is the T2 Ď008 thread. You will most likely find that the people on this thread are either;

1. On a tight budget and cannot afford to change chassis when a thread strips in the front steering knuckle; or

2. Are not quite at the standard of racing Mod at Snowbirds.

Personally I fit in both camps - I upgraded from a 2nd hand Ď007 to a 2nd hand Ď008. I really enjoy learning to set up and drive on my Ď008. There are some really experienced X-ray drivers in the clubs that I race at, who are always willing to help with the tips they have learned for the older chassis.

That is not to say the Ď008 is not competitive - quite the contrary really. Even I made the A Mains at a recent sanctioned event at my local club.

In fact one of the fastest guys in our club still races a Ď009 in Mod and he is often on the podium at sanctioned events.

Sure I would like to try a T3 2011, but I donít have a lazy $500 at the moment. So letís stick to trying to get the most out of our Ď008ís and have some fun.
__________________
SMA .....The Track.
Previously Raced Vehicles keep me on the track - sort of.
PDR TOO is offline   Reply With Quote
Old 05-29-2011, 05:03 PM   #1932
Tech Regular
 
T3_PASSION's Avatar
 
Join Date: Apr 2010
Location: tamworth
Posts: 307
Default

Quote:
Originally Posted by Coach-Z View Post
Hi Brokin,

I've just ordered a new set of 20T spur pulleys to decrease the internal ratio to 1.9.

I've also ordered new 66T/48P and 68T/48P spur gears as well as bunch of 48P pinion gears, ranging from 30T to 36T

This should get me near the 3.500 FDR that I'm aiming for.

I'll start with the smallest pinion and work my way up as I get better at keeping the car on the track at the new speeds I'll be able to achieve ;-).

Really appreciate the help BTW.
What size are the original spur pulleys and what are the part #
T3_PASSION is online now   Reply With Quote
Old 05-29-2011, 05:11 PM   #1933
Tech Master
 
superspeed's Avatar
 
Join Date: Feb 2007
Posts: 1,148
Trader Rating: 5 (100%+)
Default

20 tooth, 305577, nexus racing usa shop
superspeed is offline   Reply With Quote
Old 05-29-2011, 10:26 PM   #1934
Tech Apprentice
 
Join Date: Apr 2011
Location: Denmark
Posts: 63
Default

Quote:
Originally Posted by Coach-Z View Post
The gears and pulleys has arrived... Unfortunately the pulley is to big for my standard belts.


I've tried to adjust the belt tensioner to make it as loose as possible, but it is still not enough.

I guess I need new larger belts. Do you know which belts I need for a 38/20 pulley combination?

If you could add a link to a place that sells them, that would be much appreciated.




All is not a loss though, I've put in the new 68T spur gear, which smaller size has allowed med to add a 33T pinion, for starters...

Ive tried to figure out the difference in speed between the new an old gearing, using gearchart.com, but I can't figure out what the rpm of my 13.5 turn Robitronic motor is.

Here's a link to the specs of the motor:
http://www.robitronic.com/files/manu...nformation.pdf

As far as I can tell by the pdf file, it says it has an RPM of 3.100, but that can't be right???

Haven't tested it on the track yet, but will try and go out tomorrow.
Just a little update.

If you decide to go for a 38/20 pulley set, you will need larger belts than the ones that came with the car.

You need 513mm at the front and 189mm at the back.

For me though, I actually have enough speed right now with the 68T spur and the 32T pinion I'm running right now. Still just aiming for keeping the car on the track, just map I don't have to go get it out of the grass and bushes every two minutes.

I'm still gonna swap the pulleys when I get the new belts though, cause that keeps the front belt clear of the pinion set screw.
__________________
Xray T2'008 - Robitronic 13.5 Turn Brushless - Excelorin ESC
Losi XXX-S - Traxxas (550 can) 12 Turn Brushed - GM V3r ECS
Traxxas Rustler - Arrowind 13 Turn Brushless - Arrowind ESC
Losi Mini Desert Truck - Reedy 19 Turn Brushed - Traxxas XL-5 ESC
Losi Aftershock - Hobbyking 1550 1/8 Brushless - Trackstar 150A ESC
Coach-Z is offline   Reply With Quote
Old 05-30-2011, 02:02 AM   #1935
Tech Regular
 
PDR TOO's Avatar
 
Join Date: Mar 2009
Location: Sydney
Posts: 325
Trader Rating: 24 (100%+)
Default RPM

COACH-Z

I am no expert on things electrical, however looking at the various manufacturers web sites, as far as I can see the 3,100 you are quoting is the RPM/Volt (Kv). The standard looks to be derived by measurement at 7.2volts over a set period of time.

This would see your motorís nominal upper rev level at around 22,000.

Looking at the LRP site, their 13.5 motors are stated to rev at around 22,000, which is consistent with this calculation.
__________________
SMA .....The Track.
Previously Raced Vehicles keep me on the track - sort of.
PDR TOO is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Almost new Xray T2'008 Sean R R/C Items: For Sale/Trade 9 08-08-2008 02:17 AM
FS: XRAY T2'008 EU 6 CELL RC MARKET R/C Items: For Sale/Trade 4 06-27-2008 11:58 PM
FS: *NEW IN BOX* XRay T2'008 US Foam Spec limbohz R/C Items: For Sale/Trade 8 04-17-2008 11:20 AM
Xray T2'008 EU 6 cell Kit yyhayyim R/C Items: For Sale/Trade 17 02-05-2008 09:06 AM



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 12:45 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net