R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 08-09-2008, 05:58 AM   #1
Tech Master
 
freestyles's Avatar
 
Join Date: Jun 2008
Location: Sydney
Posts: 1,118
Trader Rating: 14 (100%+)
Arrow HOW TO MAKE AN ENGINE BREAK -IN BENCH??

I was wanting to play around with a few old motors with their port timing and modify the shapes and sizes of the ports etc. What type of load would i need to connect to the test motor so i don't snap the crank or blow it up. If anyone has one or have pic's of one can you pass them on as i would like to make my own nitro motor break-in bench.

Thanks, brad.
__________________
This public service announcement was brought to you by the letter "B" and the number "9". Thanks for watching.
freestyles is offline   Reply With Quote
Old 08-10-2008, 10:22 AM   #2
Tech Addict
 
KyoshokiddT.D's Avatar
 
Join Date: Mar 2008
Location: st james city
Posts: 637
Default

put it in a car or buy an engine dyno
KyoshokiddT.D is offline   Reply With Quote
Old 08-10-2008, 03:39 PM   #3
Tech Master
 
freestyles's Avatar
 
Join Date: Jun 2008
Location: Sydney
Posts: 1,118
Trader Rating: 14 (100%+)
Default

Unfortunately i don't have a car just lying around that i can just throw a spare motor into, I like to keep my race vehicles left alone. I was trying to get away with it without spending any money so if i could knock one up that would be great. When i've seen photo's of dyno's they look like the crank's are connected to some type of large fly wheel or something, what do dyno's consist of anyway?
__________________
This public service announcement was brought to you by the letter "B" and the number "9". Thanks for watching.
freestyles is offline   Reply With Quote
Old 08-10-2008, 03:46 PM   #4
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,861
Trader Rating: 24 (100%+)
Default

Basically a large flywheel, a fuel tank, sensors, and software. Not for continuous running, just short pulls.

Break in bench just uses a prop.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 08-11-2008, 04:55 AM   #5
Tech Master
 
freestyles's Avatar
 
Join Date: Jun 2008
Location: Sydney
Posts: 1,118
Trader Rating: 14 (100%+)
Default

"Prop"?? Like a aeroplane prop, obviously a small one?
__________________
This public service announcement was brought to you by the letter "B" and the number "9". Thanks for watching.
freestyles is offline   Reply With Quote
Old 08-11-2008, 05:53 AM   #6
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,861
Trader Rating: 24 (100%+)
Default

Yes, airplane prop.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 08-11-2008, 07:41 AM   #7
Tech Adept
 
Join Date: Jul 2008
Posts: 143
Default

try to use a old fram from a on road car and then get a prop and bolt it to the crank also dont for get the tin foil to krrp heat in i saw this done at the track some just used there old fram from one of threr cars
infernoman2008 is offline   Reply With Quote
Old 08-11-2008, 03:18 PM   #8
Tech Master
 
freestyles's Avatar
 
Join Date: Jun 2008
Location: Sydney
Posts: 1,118
Trader Rating: 14 (100%+)
Default

That's an idea, i have a couple of old chassis lying around. Would it matter if i bolted in a .21 motor onto a 1/10 sized chassis????.........It should be ok ay?
__________________
This public service announcement was brought to you by the letter "B" and the number "9". Thanks for watching.
freestyles is offline   Reply With Quote
Old 08-12-2008, 12:17 AM   #9
Tech Adept
 
Join Date: Jul 2008
Posts: 143
Default

yes it should be ok if you have too drill ew holes and also if you have a spar old gas tank bolt it up to the chassie somewhere and then take a 2x4 board and screw down the chassie to it so you have clearence from the ground .. pm me if you have any other ? that i can try to answer
infernoman2008 is offline   Reply With Quote
Old 08-12-2008, 04:14 AM   #10
Tech Master
 
freestyles's Avatar
 
Join Date: Jun 2008
Location: Sydney
Posts: 1,118
Trader Rating: 14 (100%+)
Default

Do you need anything to control the throttle or do you just do it by hand??

Thanks for this mate it's great info for my little project
__________________
This public service announcement was brought to you by the letter "B" and the number "9". Thanks for watching.
freestyles is offline   Reply With Quote
Old 08-12-2008, 08:41 AM   #11
Tech Adept
 
Join Date: Jul 2008
Posts: 143
Default

just use a old servo just to hold the carb open so you can get it to idle and hold a rev so you can build heat that is what i did
infernoman2008 is offline   Reply With Quote
Old 08-12-2008, 08:44 AM   #12
Tech Adept
 
Join Date: Jul 2008
Posts: 143
Default

the servo does not have o work just make sure that it will hold the carb open
infernoman2008 is offline   Reply With Quote
Old 08-12-2008, 10:14 AM   #13
Tech Adept
 
Join Date: Jul 2002
Posts: 129
Trader Rating: 5 (100%+)
Default

I would stay away from props for full power runs.
You would need a pretty big one to put a realistic
load on the motor and it would probably fly apart
because of the RPM. A ducted fan would be a much
better choice.
Cowboy is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hudy engine break-in bench yourtxlender R/C Items: For Sale/Trade 11 04-21-2008 07:13 PM
engine break-in bench FITO Onroad Nitro Engine Zone 14 12-18-2007 05:32 AM
WTB Hudy Engine Break-In Bench Sedanfahrer R/C Items: Wanted to Buy 5 09-26-2007 05:59 PM
Hudy Nitro engine break in bench cwalters R/C Items: Wanted to Buy 1 09-21-2007 01:07 PM
engine break-in bench heyitzalan Onroad Nitro Engine Zone 8 08-01-2005 01:37 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 07:16 AM.


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