R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 09-17-2010, 05:16 AM   #31
Tech Addict
 
jamiekerr14's Avatar
 
Join Date: Dec 2008
Location: Uk
Posts: 607
Default

Autosol is a good one-Not tried it in piston mind you but works wonder's on my O.S. 2060 pipe.. makes it look brand new.. Im sure it would work on the piston head very well the more I think about it..
__________________
Xray XB4
Supported By:
RC Disco
jamiekerr14 is offline   Reply With Quote
Old 09-17-2010, 05:27 AM   #32
Tech Elite
 
blis's Avatar
R/C Tech Elite Subscriber
 
Join Date: May 2008
Location: Brisbane
Posts: 3,434
Default No bite, no chunk..

Quote:
Originally Posted by 22Racer View Post
I would not touch it with anything that would round the corner or touch the sides. I use some 600-800 grid wet sandpaper on a surface plate with wd-40 and it cleans right up. When I resize a sleeve I always clean up the top of the piston, it does have some peformance gains.

Rex
yup similar..

I use the fine "wet and dry" (1000+), on a dead flat surface (glass). I then grab and old sleeve and wear the wet and dry down with an old used brass sleeve until it leaves a brass residue to act as a lube, sleeve head comes up a treat when you've worn off enough. You'll see etchings of the wetndry on the sleeve for a while and then the residue acts as a polish, keep going until it comes up nice!!

Then carefully and "squarely" polish in a figure of eight till just rid of the carbon deposit and done. Only the top of the piston, for the sides, whatever a soft wipe and metho wont remove leave.

And yes, dare I say.. dont go too hard and slip, chunking an edge, go real lightly as not to bite and let the piston glide freely. Just want to clean it after all. Can finish off with a polish if you like using a flat cloth but I find that after the wet'n'dry it's polished up too good to touch.

Also add, why'd we carbonize in the first place, look into plugs etc.
__________________
RC Cars: E4/G4/TCX/LAB-C02/T4'15/MM Engines
WEB: Beachmums Racing - MYRCM Race Registration
Media: Amain - RCRacingTV - RedRC - LiveRC - blisx264
blis is offline   Reply With Quote
Old 09-17-2010, 12:28 PM   #33
Tech Elite
 
22Racer's Avatar
 
Join Date: Mar 2002
Location: Wanamingo Mn
Posts: 3,078
Trader Rating: 67 (100%+)
Default

Some people posted taking the rod off to clean the piston. I never take the piston off the rod unless I am changing the rod. It is just one more thing that can go wrong if you dont get the clips in right or lose one. These motors are very simple but it doesn't take much to mess them up, small piece of dirt etc.

Rex
__________________
Rw modding and engine repair http://www.rw-mods.com
Sleeve resizing $15.00/ motor rebuild $30.00
Argus engine distributor/Avid bearings/ Alpha engines/
Fx Royal engines/ Maxy Engines
e-mail rwmods@yahoo.com Rex Welch
22Racer is offline   Reply With Quote
Old 09-17-2010, 12:39 PM   #34
JUD
Tech Master
 
JUD's Avatar
 
Join Date: Mar 2009
Location: Delaware
Posts: 1,342
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by chicky03 View Post
You never want to clean the piston.

Maybe it's ok to clean the top of it but that's it. The carbon on the sides of the piston is from castor and it helps protect and gives the engine a good seal and lubrication. It's also best to leave the top all carboned up because then you can get a good read if the engine was running too lean if the carbon goes away by itself and there is pitting on the top.

Some fuel make the piston have gummy and sticky residue, That you want to clean off with a rag and some fuel but the piston should always be as black as you can get it.
WOW!! Very interesting.
__________________
JUD
Mugen Seiki - AB Mods - AIRTRONICS - Ninja - CR Graphics - Spektrum
JUD is offline   Reply With Quote
Old 09-17-2010, 02:28 PM   #35
Tech Master
 
helivaguy's Avatar
 
Join Date: Jul 2008
Location: NYC
Posts: 1,220
Trader Rating: 42 (100%+)
Default

i always wash my engine parts and engine cases in my ultrasonic cleaner with a 50/50 mix of simple green and deionized water or distilled water.

remove that crap off the top and inside the piston otherwise it will come loose and redeposit inside the engine and through the bearings and could even foul out the glowplug,
engines should be clean inside as they are outside.
__________________
The only thing that is "still like new" is the box it came in..
Only a half gallon through it my Ass!
helivaguy is offline   Reply With Quote
Old 09-17-2010, 02:52 PM   #36
Tech Adept
 
JayRC66's Avatar
 
Join Date: May 2010
Location: Elmhurst, NY
Posts: 230
Default

I use brasso to clean the pistion head and rod. Then dip them in fuel for a bit. Then finish it off with denatured alcohol. Works fine for me. As for the casing I leave sitting in fuel for a while then wipe it down with a clean a clean rag.
__________________
Jovanny S.

Losi, Serpent, Schumacher, Ofna.... yea I got a little bit everything.
JayRC66 is offline   Reply With Quote
Old 09-17-2010, 02:58 PM   #37
Tech Adept
 
Stanton's Avatar
 
Join Date: Aug 2007
Location: Seattle
Posts: 234
Default

Quote:
Originally Posted by pitpop View Post
metal polish, and then clean it with motor spray... don't contaminate the side of the piston, especially around the top of the piston, it will screw up the seal between piston and sleeve... you have to be very careful doing this..
Mothers Aluminum Polish works awesome and I agree with not touching the sides and edges. Also works great on the button.

Good advise here from pitpop...
__________________
Horizon Hobby/Spektrum/Byrons/TLR/Houstons Engine Service
Stanton is offline   Reply With Quote
Old 09-17-2010, 03:01 PM   #38
Tech Champion
 
JAMMINKRAZY's Avatar
 
Join Date: Jun 2007
Location: Pittsburgh PA
Posts: 6,575
Trader Rating: 17 (100%+)
Default

A dremmel with plastic wire brush and some ARO will do the trick for the most part. If it is real thick, you may need to start with a brass wire brush.

As for cleaning vs. not cleaning, I always clean my pistons up periodically. I like a clean engine, and have been pretty lucky with engine life so I will continue to do so. Only clean the top, not the sides. If you don't clean the piston up you'll eventually get a thick enough coat of carbon(especially if you're using fuels with stupid dyes in them) that it can cause some issues.
__________________
-Koby Kubrin-
Thanks to my Sponsors:
Serpent America | Team Novarossi | Desoto Racing | Race AKA | Ridgeway Bodies
JAMMINKRAZY is offline   Reply With Quote
Old 09-17-2010, 03:20 PM   #39
Tech Adept
 
Stanton's Avatar
 
Join Date: Aug 2007
Location: Seattle
Posts: 234
Default

Quote:
Originally Posted by JUD View Post
WOW!! Very interesting.
I have been told by some that the carbon can actually glow and cause pre-detonation. Since that makes sense, I've always kept the piston top and button polished
__________________
Horizon Hobby/Spektrum/Byrons/TLR/Houstons Engine Service
Stanton is offline   Reply With Quote
Old 09-17-2010, 03:27 PM   #40
Tech Adept
 
Stanton's Avatar
 
Join Date: Aug 2007
Location: Seattle
Posts: 234
Default

Quote:
Originally Posted by helivaguy View Post
i always wash my engine parts and engine cases in my ultrasonic cleaner with a 50/50 mix of simple green and deionized water or distilled water.

remove that crap off the top and inside the piston otherwise it will come loose and redeposit inside the engine and through the bearings and could even foul out the glowplug,
engines should be clean inside as they are outside.
I was on this program until I found out that ultrasound will destroy bearings and will cause pitting in aluminum. It does make them nice and clean though...
__________________
Horizon Hobby/Spektrum/Byrons/TLR/Houstons Engine Service
Stanton is offline   Reply With Quote
Old 09-17-2010, 03:36 PM   #41
Tech Champion
 
JAMMINKRAZY's Avatar
 
Join Date: Jun 2007
Location: Pittsburgh PA
Posts: 6,575
Trader Rating: 17 (100%+)
Default

Quote:
Originally Posted by Stanton View Post
I have been told by some that the carbon can actually glow and cause pre-detonation. Since that makes sense, I've always kept the piston top and button polished
The reason the carbon build-up can cause pre-detonation is because it effectively lowers head clearance and increases compression. Too little head clearance is what will cause pre-detonation.
__________________
-Koby Kubrin-
Thanks to my Sponsors:
Serpent America | Team Novarossi | Desoto Racing | Race AKA | Ridgeway Bodies
JAMMINKRAZY is offline   Reply With Quote
Old 09-17-2010, 03:41 PM   #42
Tech Adept
 
Stanton's Avatar
 
Join Date: Aug 2007
Location: Seattle
Posts: 234
Default

Quote:
Originally Posted by JAMMINKRAZY View Post
The reason the carbon build-up can cause pre-detonation is because it effectively lowers head clearance and increases compression. Too little head clearance is what will cause pre-detonation.
Interesting...thanks for the info.
__________________
Horizon Hobby/Spektrum/Byrons/TLR/Houstons Engine Service
Stanton is offline   Reply With Quote
Old 09-17-2010, 03:44 PM   #43
Tech Elite
 
22Racer's Avatar
 
Join Date: Mar 2002
Location: Wanamingo Mn
Posts: 3,078
Trader Rating: 67 (100%+)
Default

Quote:
Originally Posted by JAMMINKRAZY View Post
A dremmel with plastic wire brush and some ARO will do the trick for the most part. If it is real thick, you may need to start with a brass wire brush.

As for cleaning vs. not cleaning, I always clean my pistons up periodically. I like a clean engine, and have been pretty lucky with engine life so I will continue to do so. Only clean the top, not the sides. If you don't clean the piston up you'll eventually get a thick enough coat of carbon(especially if you're using fuels with stupid dyes in them) that it can cause some issues.
How do use a dremel and not round the corner of the piston?

Rex
__________________
Rw modding and engine repair http://www.rw-mods.com
Sleeve resizing $15.00/ motor rebuild $30.00
Argus engine distributor/Avid bearings/ Alpha engines/
Fx Royal engines/ Maxy Engines
e-mail rwmods@yahoo.com Rex Welch
22Racer is offline   Reply With Quote
Old 09-17-2010, 03:46 PM   #44
Tech Master
 
helivaguy's Avatar
 
Join Date: Jul 2008
Location: NYC
Posts: 1,220
Trader Rating: 42 (100%+)
Default

Quote:
Originally Posted by Stanton View Post
I was on this program until I found out that ultrasound will destroy bearings and will cause pitting in aluminum. It does make them nice and clean though...
ultrasound?

false..ultrasonic cleaning does not pit aluminum nor does it pit any type of ferris or non ferris metal..dont know who sold you on that?
second only an idiot would sonicate an engine with the bearings in it.
__________________
The only thing that is "still like new" is the box it came in..
Only a half gallon through it my Ass!
helivaguy is offline   Reply With Quote
Old 09-17-2010, 03:47 PM   #45
Tech Champion
 
JAMMINKRAZY's Avatar
 
Join Date: Jun 2007
Location: Pittsburgh PA
Posts: 6,575
Trader Rating: 17 (100%+)
Default

Quote:
Originally Posted by 22Racer View Post
How do use a dremel and not round the corner of the piston?

Rex
I'm only using a plastic wire brush and that ain't rounding off your piston.
__________________
-Koby Kubrin-
Thanks to my Sponsors:
Serpent America | Team Novarossi | Desoto Racing | Race AKA | Ridgeway Bodies
JAMMINKRAZY is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
HPI R40 Nitro Car Forum EVOLUTION Nitro On-Road 11979 06-26-2012 07:57 PM
how long can a nitro engine last?? dreaux Nitro Off-Road 12 03-25-2009 10:33 AM
New to electric touring ... TC4 + brushless ... tips ? Tabushi Electric On-Road 9 07-22-2008 08:22 PM
Best way to clean my savage onintks Monster Trucks 10 03-01-2006 06:35 AM
Flushing a Motor TRAJ Onroad Nitro Engine Zone 30 06-09-2005 12:28 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 11:24 PM.


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