R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 10-29-2014, 03:19 PM   #1486
Tech Initiate
 
Join Date: Jul 2002
Location: Canada
Posts: 30
Default

What shock pistons are you using?
Surrey is offline   Reply With Quote
Old 10-29-2014, 04:14 PM   #1487
Tech Master
 
wtcc's Avatar
 
Join Date: Jul 2010
Location: Germany
Posts: 1,137
Trader Rating: 1 (100%+)
Default

I have put a thin layer of plastic underneath the piston. The layer lets three holes open. Because it is so thin it bows away under pressure from the piston when the shaft moves upward and lets the oil pass. If the shaft moves down, the pressure presses the layer against the piston and closes the holes.
Here is a fast scribble I made when the idea struck me:




The pistons are these:

http://www.reflexracing.net/RSD-10mm...es_p_1600.html
__________________
AE / Reedy / RSD
wtcc is offline   Reply With Quote
Old 10-29-2014, 08:32 PM   #1488
Tech Master
 
NutDriver's Avatar
 
Join Date: Nov 2012
Location: North Carolina
Posts: 1,943
Trader Rating: 14 (100%+)
Default

RPM used to make dual pistons very similar in concept to this.
__________________
"Racing makes heroin addiction look like a vague longing for something salty" - Peter Egan

USVTA member #111
NutDriver is offline   Reply With Quote
Old 10-29-2014, 09:49 PM   #1489
Tech Addict
 
ViperZ's Avatar
 
Join Date: Jul 2013
Location: Saskatoon, SK. Canada
Posts: 625
Trader Rating: 5 (100%+)
Default

Had a good practice session tonight! Definitely improving and getting a bit more consistent in lap times.

My AE motor cooling fan packed it in. Looks like the fan blade may have tagged the mount during a board hit. It smelt like burnt electronics when I pitted, and the fan was out of alignment to the shroud. I was able to get it back in place and the fan ran afterward, but it was really noisy and certainly not at full speed

I removed it, ran another practice session. Motor temp was at 174F after more than 8 minutes, at +50 degrees timing. I may back it off until I get a replacement fan, or not
__________________
*
Who races a Mazda Sedan...? Honestly...? :D
ViperZ is offline   Reply With Quote
Old 10-30-2014, 11:14 AM   #1490
Tech Regular
 
chevtech23's Avatar
 
Join Date: Oct 2011
Location: Everett WA
Posts: 423
Default

The AE fan that comes with the cool mount has a short life span, I haven't seen anybody get more than two races out of it. but the bracket is cool
chevtech23 is offline   Reply With Quote
Old 10-30-2014, 02:24 PM   #1491
AE-Reedy
 
Join Date: May 2008
Posts: 751
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by chevtech23 View Post
The AE fan that comes with the cool mount has a short life span, I haven't seen anybody get more than two races out of it. but the bracket is cool
I know it is not optimum but mounting the fan on the bracket backwards help the life out a lot. It does still help cool the motor just maybe not as much.
Sean Cochran is offline   Reply With Quote
Old 10-30-2014, 03:54 PM   #1492
Tech Adept
 
Join Date: Sep 2012
Location: Timbuk 2
Posts: 163
Default

Quote:
Originally Posted by Sean Cochran View Post
I know it is not optimum but mounting the fan on the bracket backwards help the life out a lot. It does still help cool the motor just maybe not as much.
I don't have the setup in front of me right now but does anyone use a aftermarket fan in replacement? Do all these fans give out after a time?
__________________
TC7 TC6.2 Tamiya Mini RC12r5.2 Reedy FUTABA RSD
irvinew is offline   Reply With Quote
Old 10-30-2014, 04:34 PM   #1493
Tech Regular
 
chevtech23's Avatar
 
Join Date: Oct 2011
Location: Everett WA
Posts: 423
Default

yes, right now I have a Viper in one car, Muchmore in the other, the size is the same.
chevtech23 is offline   Reply With Quote
Old 10-30-2014, 07:56 PM   #1494
Tech Champion
 
DARKSIDE's Avatar
 
Join Date: Mar 2008
Location: Nashville-Memphis
Posts: 7,651
Trader Rating: 2 (100%+)
Default

Ive been running mine since AE released the fan and mount, and I can say its holding up pretty well...Ive got the AE fan in one car and an R1 in the other...both are getting it done
__________________
Myron "BATTMAN" Kinnard
Team Associated/Reedy Powered/PROTOform/RockStar Paint, LLC
THUNDER JAM IX Snowbirds Warm-up
January 21, 2017 Thunder RC Raceway
http://events.rcsignup.com/events/displayEvent.cfm?id=5313
DARKSIDE is offline   Reply With Quote
Old 10-31-2014, 08:10 AM   #1495
Tech Regular
 
Conrad's Avatar
 
Join Date: Jun 2005
Location: Scotland
Posts: 456
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by wtcc View Post
I have put a thin layer of plastic underneath the piston. The layer lets three holes open. Because it is so thin it bows away under pressure from the piston when the shaft moves upward and lets the oil pass. If the shaft moves down, the pressure presses the layer against the piston and closes the holes.
Here is a fast scribble I made when the idea struck me:




The pistons are these:

http://www.reflexracing.net/RSD-10mm...es_p_1600.html
Nice simple execution wtcc, I know it's be done a few times over the years by different people/companies but how did you find the change on car in handling?
__________________
Swith Racing [www.swithracing.co.uk]
Conrad is offline   Reply With Quote
Old 10-31-2014, 09:16 AM   #1496
Tech Addict
 
ViperZ's Avatar
 
Join Date: Jul 2013
Location: Saskatoon, SK. Canada
Posts: 625
Trader Rating: 5 (100%+)
Default

^^^ That's intense


So this fan situation. That it's a common failure, what's a person to do? Get a motor heat sink mounted one like I have on my TC6.1?

I picked up a replacement Muchmore at my LHS, however it was not a thick. It seems to have a similar RPM by sound, however I don't think it moves quite as much air. I also ordered a few Yeah Racing Tornados to have on hand as replacements.

For the Muchmore, I placed a small 1mm washer between the fan mount and the fan. I may try a 3mm. This should keep the fan blades from tagging the mount, which is what I'm sure happened last time.

1mm spacer


Compared to the Associated fan


I readjusted my chassis to Cartwright's settings, even though I'll have to do it all over once the Yokomo springs arrive. Surprisingly I wasn't too far off, with exception of the droop. Seems I had more droop than the 5.5 as I set it up as a ratio of ride height, as instructed by a fellow member. It was about 7-8mm

__________________
*
Who races a Mazda Sedan...? Honestly...? :D
ViperZ is offline   Reply With Quote
Old 10-31-2014, 09:43 AM   #1497
Tech Master
 
samnelso's Avatar
 
Join Date: Aug 2011
Location: Fitchburg, MA
Posts: 1,751
Trader Rating: 1 (100%+)
Default

I use the AE fan mount and have not had any fan issues. Using the WTF fan currently. Yeah racing fan is good too.

Nice photos as always Viper.
__________________
Team Associated | Reedy | Airtronics

RC Excitement: Fitchburg, MA | RC Madness: Enfield, CT | Horsham RC
samnelso is offline   Reply With Quote
Old 10-31-2014, 10:00 AM   #1498
Tech Addict
 
ViperZ's Avatar
 
Join Date: Jul 2013
Location: Saskatoon, SK. Canada
Posts: 625
Trader Rating: 5 (100%+)
Default

Quote:
Originally Posted by samnelso View Post
I use the AE fan mount and have not had any fan issues. Using the WTF fan currently. Yeah racing fan is good too.

Nice photos as always Viper.
Thanks Sam!! Great to hear on the fan. I learnt of those WTF fans after I ordered mine. I may get a few for I'm always a sucker for fans You should see my out of control collection of PC fans from my PC modding days, it's ridiculous and embarrassing ....
__________________
*
Who races a Mazda Sedan...? Honestly...? :D
ViperZ is offline   Reply With Quote
Old 10-31-2014, 10:56 AM   #1499
Tech Adept
 
Join Date: Jan 2005
Location: Seattle, Washington
Posts: 185
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by ViperZ View Post
I readjusted my chassis to Cartwright's settings, even though I'll have to do it all over once the Yokomo springs arrive. Surprisingly I wasn't too far off, with exception of the droop. Seems I had more droop than the 5.5 as I set it up as a ratio of ride height, as instructed by a fellow member. It was about 7-8mm
I'm (I think) one of the few that uses the plain old droop gauge. Make sure you measure to the notch on the arm like the instructions say and not the bottom of the arm.

The yokomo springs are a big difference to me. I'm not sure exactly why but after trying AE, RSD, Tamiya etc, they are more consistent and easier to drive hard. RSD came close.

That setup rolls a fair amount. I'm testing a slightly more aggressive setup now. I'll get some more time this weekend finally
__________________
Andrew Cartwright | Reflex Racing

Last edited by A_Cartwright; 10-31-2014 at 10:57 AM. Reason: me fail english
A_Cartwright is offline   Reply With Quote
Old 10-31-2014, 01:31 PM   #1500
Tech Addict
 
ViperZ's Avatar
 
Join Date: Jul 2013
Location: Saskatoon, SK. Canada
Posts: 625
Trader Rating: 5 (100%+)
Default

Quote:
Originally Posted by A_Cartwright View Post
I'm (I think) one of the few that uses the plain old droop gauge. Make sure you measure to the notch on the arm like the instructions say and not the bottom of the arm.

The yokomo springs are a big difference to me. I'm not sure exactly why but after trying AE, RSD, Tamiya etc, they are more consistent and easier to drive hard. RSD came close.

That setup rolls a fair amount. I'm testing a slightly more aggressive setup now. I'll get some more time this weekend finally

Awesome, Thanks for posting in Andrew! Hmmm, I'll have to check to be sure I did it right.

So a more aggressive set-up would be what? Higher rate springs?
__________________
*
Who races a Mazda Sedan...? Honestly...? :D
ViperZ 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 05:35 AM.


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

SEO by vBSEO 3.5.0