R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 10-25-2008, 12:45 AM   #16
Tech Elite
 
SWTour's Avatar
 
Join Date: Sep 2003
Location: Central Coast...CALIF.
Posts: 2,873
Trader Rating: 9 (100%+)
Default

Quote:
a brushed 27t motor is 2 tenths a lap faster than a 17.5
That's the kind of statement that really doesn't say anything (Sorry, my opinion)

If this is a 90 ft. OVAL .2 is a TON, if this is a super technical ROAD COURSE running 22- 23 seconds laps...or higher, .2 isn't a lot, and is hard to prove it's the motor combo.

So more info would be needed to show the validity of that. (Track Size and Type...and results of drivers of same quality)
__________________
Joe Myers
R/C Racing since 1985 ~ Santa Maria, CA (Central Coast)
2001-2012 - South-West Tour R/C Oval Series...will the SWT be revived?
Things are headed towards a return of the SWT Series, but for
2017 the focus will be on the Encino Velodrome (and dirt oval racing)
SWTour is offline   Reply With Quote
Old 10-25-2008, 12:46 AM   #17
Tech Regular
 
Mr. MR4's Avatar
 
Join Date: Oct 2001
Location: Malta, EU
Posts: 297
Trader Rating: 8 (100%+)
Default

Has anybody compared 19t brushed and 10.5 brushless?
Mr. MR4 is offline   Reply With Quote
Old 10-25-2008, 05:09 AM   #18
Tech Elite
 
raffaelli's Avatar
 
Join Date: Sep 2001
Location: Land of the Free, Home of the Brave
Posts: 2,924
Trader Rating: 13 (100%+)
Default

Our experience touring on a small carpet is that the 13.5 with tuned rotor is equal to 27t. The 17.5 with a rotor was just not as fast anywhere on the track.
__________________
24ITA
raffaelli is offline   Reply With Quote
Old 10-25-2008, 07:51 AM   #19
Company Representative
 
ammdrew's Avatar
 
Join Date: Feb 2002
Posts: 10,585
Trader Rating: 25 (100%+)
Default

you need to gear up your 13.5 then as it is pretty equal to 19 turn and dominate to 27 turn.



17.5 is a hair off a well tuned 27 turn with that being said in club racing with less motor work being done it is generally faster for most. they are extremly close on the track and for most the missed apex or wall touch will be the deciding factor.
__________________
Team Tekin, Team Scream, Paint By Mike, Team Mölzer Mowery Racing, EA Motorsports, Speedmerchant, TQ Wire

MMR Direct Minneapolis World Class Indoor Race Facility.
On Road and Off Road racing year round.

www.molzermoweryracing.com
http://www.facebook.com/pages/MMR/160679913944205?__req=9

Check out You Tube mmrswracing. Every qualifier and every main uploaded at the end of every race day.
ammdrew is offline   Reply With Quote
Old 10-25-2008, 11:58 AM   #20
Tech Elite
 
wallstreet's Avatar
 
Join Date: Mar 2005
Posts: 3,904
Trader Rating: 20 (92%+)
Send a message via AIM to wallstreet
Default

Quote:
Originally Posted by SWTour View Post
That's the kind of statement that really doesn't say anything (Sorry, my opinion)

If this is a 90 ft. OVAL .2 is a TON, if this is a super technical ROAD COURSE running 22- 23 seconds laps...or higher, .2 isn't a lot, and is hard to prove it's the motor combo.

So more info would be needed to show the validity of that. (Track Size and Type...and results of drivers of same quality)

Sorry i did not make a clear statement,,, in onroad racing a brushed motor is 2 tenths faster than the 17.5, this has been tested by some of the best drivers in the country.

SWTOUR this is the on-road forum, not oval racing forum.. but i should have made myself more clear.
wallstreet is offline   Reply With Quote
Old 10-25-2008, 12:24 PM   #21
Tech Legend
 
Wild Cherry's Avatar
 
Join Date: Aug 2001
Location: TRCR Modified Driver
Posts: 22,595
Default

Kinda silly to say a B27T is faster than a BL17.5 as they are coming out with new versions everyday and each new 17.5BL get a little faster than the older ones...

Coming Soon ,17.5BL that are faster than even B19 turn...
Wild Cherry is offline   Reply With Quote
Old 10-25-2008, 02:23 PM   #22
Tech Elite
 
wallstreet's Avatar
 
Join Date: Mar 2005
Posts: 3,904
Trader Rating: 20 (92%+)
Send a message via AIM to wallstreet
Default

It can be as funny as you like , but its true.

At the carpet nats at the hobbyplex drivers in the stock class were able to choose 27t brushed or 17.5, all of the fast drivers were all running 27t motors. After testing at that event it was found that a 27t brushed motor was 2 tenths a lap faster than a 17.5.

I am just stating the facts, as proven by some of the best drivers in the states. Trust me when i tell you i am a huge fan of brushless motors, but i will admit that a 17.5 is a tick slower than a brushed motor.
wallstreet is offline   Reply With Quote
Old 10-25-2008, 03:32 PM   #23
Tech Legend
 
Wild Cherry's Avatar
 
Join Date: Aug 2001
Location: TRCR Modified Driver
Posts: 22,595
Default

Give it a little time, and 27T will not be able to keep up..
Wild Cherry is offline   Reply With Quote
Old 10-25-2008, 03:43 PM   #24
Tech Master
 
CREWMAN's Avatar
 
Join Date: Aug 2007
Posts: 1,539
Trader Rating: 19 (100%+)
Default

i wouldnt say that but one thing that you have to add in is that a brushed motor will "fade" toward the end of a race were a 17.5's are always consistent
__________________
D&K HOBBIES!!!!
Losi 8ight-T 2.0 Race Roller/Losi 350/JR 9100 Servos/Spektrum DX3R
BMI Copperhead 12/Thunder Power Lipo/Futaba Servo/Express 17.5/Spektrum DX3R
CREWMAN is offline   Reply With Quote
Old 10-25-2008, 03:51 PM   #25
Tech Legend
 
Wild Cherry's Avatar
 
Join Date: Aug 2001
Location: TRCR Modified Driver
Posts: 22,595
Default

My point is this

No matter what wind , the manufactures can improve the design and increase the power...

coming soon

BL17.5 motor`s that can keep up with old BL10.5 designs ...

So basing class`s on ,motor winds is coming to a end as does not work anymore...
Wild Cherry is offline   Reply With Quote
Old 10-25-2008, 03:55 PM   #26
Tech Elite
 
vr6cj's Avatar
 
Join Date: Jul 2008
Location: Modesto, CA
Posts: 4,052
Trader Rating: 124 (100%+)
Default

Quote:
Originally Posted by track-attack15 View Post
27T is faster but 17.5 is easier.
I agree. I still race brushed in TC stock and beat all the 17.5's. Maybe it's just me? Nah, i blow there doors off on the back straights.
vr6cj is offline   Reply With Quote
Old 10-25-2008, 04:46 PM   #27
PaZ
Tech Master
 
PaZ's Avatar
 
Join Date: Oct 2004
Location: Cornwall (England)
Posts: 1,262
Default

im using a T bang XS type M (best brushed motor ive ever had) and TJ Cells VP 4300's against a guy who i used to have epic races with back when he had axioms and EP's now hes running Brushless and lipo cause its legal let me know when they catch up again will you please...... in all fairnes the brushless is still the same pace as my brushed but he can't slow it down as well as a brushed does naturally if u break running a one way your going backwards, we run a tight track where the natural slowing of a brushed motor is enough to get you through a corner at a good speed, a brushless wont letyou, you have to break to make the turns. If your on a open flowing track brushless but tight and twisty id go brushed but then it depends on your set up my brushed still romped on a open track but thats just me im not speaking on a whole i know others will say different this is just what ive experienced
__________________
Xray T2 0079
Mardave V12 VRX
Team T.J Cells
CT Race Bodies
PaZ is offline   Reply With Quote
Old 10-25-2008, 05:35 PM   #28
Tech Regular
 
Join Date: Jan 2007
Location: Rantoul,Il
Posts: 424
Default

Hi, I'm playing with both and I have a couple of questions. What is the current general FDR for a TC with a 27t brushed? It used to be 7.00 to1, but I noticed on the USVTA website he is recommending 5.4-5.7(@4.8 volts). Does the lower voltage change the FDR that much or has the overall FDR changed? Where can I find large pinions (36-40, 48 pitch). I'm finding that for the TCs I have,I need very large pinions to reach a FDR of 3.5 to 1.(with a 17.5 brushless) Thanks, Don
DLS II is offline   Reply With Quote
Old 10-26-2008, 02:12 PM   #29
Tech Regular
 
Join Date: Jan 2007
Location: Rantoul,Il
Posts: 424
Default

bump
DLS II is offline   Reply With Quote
Old 10-26-2008, 02:45 PM   #30
Tech Champion
 
geeunit1014's Avatar
 
Join Date: Sep 2005
Location: The dirty burnie
Posts: 5,505
Trader Rating: 12 (100%+)
Default

Quote:
Originally Posted by DLS II View Post
Hi, I'm playing with both and I have a couple of questions. What is the current general FDR for a TC with a 27t brushed? It used to be 7.00 to1, but I noticed on the USVTA website he is recommending 5.4-5.7(@4.8 volts). Does the lower voltage change the FDR that much or has the overall FDR changed? Where can I find large pinions (36-40, 48 pitch). I'm finding that for the TCs I have,I need very large pinions to reach a FDR of 3.5 to 1.(with a 17.5 brushless) Thanks, Don
I ran a 6.6 with a CO27 this summer w/ rubber tires/asphalt on a 110ft straight. For ustva, yes the lower voltage requires a higher gear. thats pretty much a given. PRS makes large pinions (up 65t 64p)
__________________
Mike Gee

Awesomatix USA/Pyscho Cells Racing/Tekin/Sweep Racing/RSD/180 Raceway/Johns Mobile Raceway/TQ Wire/Avid/Sanwa
geeunit1014 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Carcar Ophidian Canadian R/C Scene 12806 Yesterday 07:07 PM
N.a.s.c.a.r chammond Canadian R/C Scene 9564 10-14-2017 05:10 PM
Western Canadian Indoor Chanpionship Series tandman Canadian R/C Scene 730 08-10-2009 09:39 PM
Should Stock Brushed Motors go away in higher level events? Dawn Sanchez Electric On-Road 157 01-01-2009 05:43 PM
On-Road classes aERonAUtical96 Electric On-Road 14 04-28-2008 07:16 PM
ARIZONA TOURING CAR RACERS rcracerdude Racing Forum 6536 03-06-2008 04:21 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 08:25 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