R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 02-12-2006, 03:35 PM   #13906
Tech Champion
 
Join Date: Jun 2004
Location: St Louis
Posts: 7,653
Trader Rating: 193 (99%+)
Default

Quote:
Originally Posted by Greg45231
micrors4guy ,

I don't know much about setting up for asphault but the HPI site has a lot of setup sheets on there and the majority are for outdoors with rubber tires so that may be a good starting point.

For the Integy motor you will want to gear high like around a 1.3 on roll out. 19's like it tall, just keep and eye on the color of the comm and and brush spring tension.

Greg
Greg shouldn't you be racing today?

Nice little snow shower here.
__________________
Please become an organ donor.
www.donatelife.net
Custom decals and Sno-Tee'z, T-Shirts by Sno Camel
dodgeguy is offline   Reply With Quote
Old 02-12-2006, 04:06 PM   #13907
Tech Regular
 
loopedeloop's Avatar
 
Join Date: Jan 2005
Location: Whangarei Newzealand
Posts: 491
Default

Quote:
Originally Posted by micrors4guy
im starting to see the term rollout alot for setup reasons with the on road stuff. can you tell me how to measure this?

from te sounds of it it seem as roll out is how far the car travels b4 the motor makes one revoloution?
Rollout is the distance the vehicle moves forward for one revolution of the motor.
Generally used with foam tyred cars as the tire diameter is always changing (reducing).
loopedeloop is offline   Reply With Quote
Old 02-12-2006, 05:25 PM   #13908
Tech Adept
 
Join Date: Feb 2006
Location: baltimore
Posts: 193
Default pinion help

what pinion is best for a 13 turn motor.


does some one have a good setup for asphalt.

http://www.htufrederickmd.com/RCraces.htm
LORD SHADO is offline   Reply With Quote
Old 02-12-2006, 06:04 PM   #13909
Tech Master
 
SOuthernFRIED's Avatar
 
Join Date: Jan 2003
Location: Olive Branch,MS
Posts: 1,235
Trader Rating: 21 (100%+)
Default

What's a good starting point for a 19 turn in a PRO4? I will be running outdoor asphalt on rubber. Motor will either be a Atlas 19 or a C2. Track size about 60x110. I have heard 6.0FDR??????

Thanks for any tips
__________________
James Cooper
SouthernFriedRacing
teamsfr@gmail.com
SOuthernFRIED is offline   Reply With Quote
Old 02-12-2006, 06:10 PM   #13910
Tech Regular
 
work's Avatar
 
Join Date: Jan 2002
Location: www.work-wheels.co.jp
Posts: 405
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by LORD SHADO
does some one have a good setup for asphalt.
Try here http://www.hpiracing.com/?page=http%...-m.php%23Pro+4
work is offline   Reply With Quote
Old 02-12-2006, 07:24 PM   #13911
Tech Apprentice
 
Join Date: Apr 2005
Location: Cincinnati, Ohio
Posts: 92
Default

dodgeguy,

I wish I could have run today but we had a birthday party for my daughter. I am going to try next week and maybe run 19t or mod if there are enough guys. I just want to run something other than stock and since most of the guys have switched to brushless we don't have a stock turnout anymore.

For those guys that are looking for roll out here is the formula.

(tire dia x 3.14) / ((Spur/pinion) x 2.4375)

Note that the 2.4375 is the internal Pro 4 gear ratio per the manual.

Here is sample so you can check your math.

Tire dia 2.25 inches x 3.14 = 7.065 save this in memory in your calculator.

100 tooth spur divided by 33 tooth pinion = 3.030

3.030 x 2.4375 = 7.39 rounded up. Write this down

Hit memory recall and divide the 7.065 by 7.39 to get .956 which is how far the car will move in inches with one rotation of the motor. This happens to be my rollout for a monster stock last time out at my track.

Greg
__________________
I'm not as good as I could be, but I am a much improved version of what I once was.
Greg45231 is offline   Reply With Quote
Old 02-12-2006, 08:11 PM   #13912
Tech Champion
 
Join Date: Jun 2004
Location: St Louis
Posts: 7,653
Trader Rating: 193 (99%+)
Default

Greg, I know what you mean about family. My in-laws are here for the weekend. I really like them so it is not a bad time here.

I am thinking of running something other than brushless next Sunday. I now have a motor sponsor so I will be running more brushed classes. I am also thinking of racing at other tracks to get some more runs with brushed fast guys. Our track seems to be the only one around with a brushless class as big as it is.

So 19 turn may work next weekend.
__________________
Please become an organ donor.
www.donatelife.net
Custom decals and Sno-Tee'z, T-Shirts by Sno Camel
dodgeguy is offline   Reply With Quote
Old 02-12-2006, 08:19 PM   #13913
Tech Adept
 
Join Date: Feb 2006
Location: baltimore
Posts: 193
Red face thanks work

hey work kill that monkey its driving me crazy!
LORD SHADO is offline   Reply With Quote
Old 02-12-2006, 09:23 PM   #13914
Tech Elite
 
MikeR's Avatar
 
Join Date: Aug 2001
Location: Oceanside, CA
Posts: 4,918
Trader Rating: 14 (100%+)
Default

Quote:
Originally Posted by SOuthernFRIED
What's a good starting point for a 19 turn in a PRO4? I will be running outdoor asphalt on rubber. Motor will either be a Atlas 19 or a C2. Track size about 60x110. I have heard 6.0FDR??????

Thanks for any tips


With C2, yup.



Here's a tip I got from my buddy who got it from team HPI. Gear your car up until the motor tops out at 200deg F.. When you pull it off the track after a 5 minute run temp it. Worked for me perfectly today. Brushes wear out but motor was ballistic the whole 5 minutes.
__________________
www.exotekracing.com ☆ASSOCIATED☆DURANGO☆HPI☆HB RACING☆KYOSHO☆LOSI/TLR☆SERPENT☆TAMIYA☆XRAY☆

A picture with your post, when trouble shooting, will probably get more rctech help than without...
MikeR is offline   Reply With Quote
Old 02-13-2006, 01:24 AM   #13915
Tech Addict
 
Nicadrauspro4's Avatar
 
Join Date: Oct 2005
Location: Automobili Lamborghini S.p.A., Italy
Posts: 677
Default

I just recenntly changed my C-hubs to aluminum. Thanks to Geeto for the very cheap price. Anyway, first I thought it was just "bling", but then my pro4's cornering improved because the auluminum C-hubs doesn't flex on corners like the graphite plastic. Which comes to a point that the aluminum C-hubs are not just bling but plays a good role in the cornering.

__________________
works1200.weebly.com
nicadraus-lamborghini.weebly.com
Nicadrauspro4 is offline   Reply With Quote
Old 02-13-2006, 05:36 AM   #13916
Tech Adept
 
Join Date: Feb 2006
Location: baltimore
Posts: 193
Default

nice tip mikerr , 13 turn motor hpi pro 4 . what pinion . i could never get this gearing thing right. help me !
LORD SHADO is offline   Reply With Quote
Old 02-13-2006, 09:33 PM   #13917
Tech Addict
 
Join Date: Jan 2004
Location: thomasville,nc
Posts: 518
Send a message via Yahoo to nomaak
Default clicking problems

you guys were right about those clicking problems! the rear gearbox had only one brass shim on eigther side. things are properly shimmed up now and there's no more clicking! thanx a heap!!
nomaak is offline   Reply With Quote
Old 02-14-2006, 05:27 AM   #13918
Tech Apprentice
 
Join Date: Apr 2005
Location: Cincinnati, Ohio
Posts: 92
Default

Lord Shado,

The manual says to for a 12 turn to gear it at 7.3-7.4 ratio which with a 98 spur would be a 33 pinion. Lokking at how the ratios are changing in their chart it looks like you would be close to gearing it like a stock motor for 13 turns. I would imagine this is for rubber tires which are larger in diameter than the foams. I posted the roll out formula a page or so back so you can work your tire diameter into that equation and get a feel for where you need to be if you are running foams.

If you need some help with it, post your tire diameter and I'll work it out for you. Just let me know if you are using 48 or 64 pitch gears.

Greg
__________________
I'm not as good as I could be, but I am a much improved version of what I once was.
Greg45231 is offline   Reply With Quote
Old 02-14-2006, 03:23 PM   #13919
Tech Regular
 
Join Date: Jul 2005
Posts: 280
Default

Quote:
Originally Posted by Nicadrauspro4
I just recenntly changed my C-hubs to aluminum. Thanks to Geeto for the very cheap price. Anyway, first I thought it was just "bling", but then my pro4's cornering improved because the auluminum C-hubs doesn't flex on corners like the graphite plastic. Which comes to a point that the aluminum C-hubs are not just bling but plays a good role in the cornering.

where did you get the c-hubs?
bosfan is offline   Reply With Quote
Old 02-14-2006, 10:08 PM   #13920
Tech Addict
 
Nicadrauspro4's Avatar
 
Join Date: Oct 2005
Location: Automobili Lamborghini S.p.A., Italy
Posts: 677
Default

Quote:
Originally Posted by bosfan
where did you get the c-hubs?
Geetoo sold to me for about $6 pair. Very cheap.

__________________
works1200.weebly.com
nicadraus-lamborghini.weebly.com
Nicadrauspro4 is offline   Reply With Quote
Reply



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 09:09 PM.


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

SEO by vBSEO 3.5.0