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 03-28-2008, 07:21 PM   #1
Tech Regular
 
jameslow's Avatar
 
Join Date: Feb 2007
Location: Somewhere?????
Posts: 381
Trader Rating: 1 (100%+)
Default Crank shaft sealant!

Hi guys,

Can I check, for those guys who mod their engine crank shaft, what sealant did you all use to seal up the hole in the crank shaft to make it smooth?

Thanks!
__________________
Waiting!
jameslow is offline   Reply With Quote
Old 03-29-2008, 03:11 AM   #2
Tech Elite
 
stefan's Avatar
 
Join Date: Aug 2001
Location: Bavaria, Germany
Posts: 3,273
Send a message via AIM to stefan
Default

Arexxon Motorsil D
stefan is offline   Reply With Quote
Old 03-29-2008, 03:42 AM   #3
Tech Regular
 
RayJ's Avatar
 
Join Date: May 2003
Posts: 445
Default

Permatex Red RTV works just fine.
RayJ is offline   Reply With Quote
Old 03-29-2008, 10:18 AM   #4
Tech Elite
 
stefan's Avatar
 
Join Date: Aug 2001
Location: Bavaria, Germany
Posts: 3,273
Send a message via AIM to stefan
Default

Quote:
Originally Posted by RayJ View Post
Permatex Red RTV works just fine.
The problem with the Permatex is, thaqt is is not liquid and you have to smear it in, which will never give you a smooth surface. The Motorsil stuff is what the manufacturers are using. It's liquid and it flows out like a mirror.
stefan is offline   Reply With Quote
Old 03-29-2008, 03:55 PM   #5
Tech Regular
 
RayJ's Avatar
 
Join Date: May 2003
Posts: 445
Default

Stefan....can't find Motorsil D listed anywhere in the US.
RayJ is offline   Reply With Quote
Old 03-30-2008, 08:42 PM   #6
Tech Regular
 
jameslow's Avatar
 
Join Date: Feb 2007
Location: Somewhere?????
Posts: 381
Trader Rating: 1 (100%+)
Default

Btw is it really very useful to seal up the crank shaft? Overall show great improvement to the engine? Bec from what i know, by modding the crank is the area u can get more power than modding the sleeve! Im i right?

Thanks!
__________________
Waiting!
jameslow is offline   Reply With Quote
Old 03-30-2008, 10:28 PM   #7
Tech Elite
 
stefan's Avatar
 
Join Date: Aug 2001
Location: Bavaria, Germany
Posts: 3,273
Send a message via AIM to stefan
Default

Quote:
Originally Posted by jameslow View Post
Btw is it really very useful to seal up the crank shaft? Overall show great improvement to the engine? Bec from what i know, by modding the crank is the area u can get more power than modding the sleeve! Im i right?

Thanks!
The silicone is only used when you have a drilled / lightened crank. The deal is that you remove weight from the crank ( towards the clutch side) and then you fill the void with the much lighter silicone, to keep the crankcase volume about the same.

To get good, usable power from an engine, you'll have to modify the entire engine, crank timing and all of the sleeve ports, otherwise you'll have a funny running engine.
stefan is offline   Reply With Quote
Old 04-01-2008, 10:57 AM   #8
Tech Master
 
JetMD's Avatar
 
Join Date: Jan 2006
Location: Richmond VA
Posts: 1,172
Trader Rating: 1 (100%+)
Default

I have used red permatex a few times with great success. It is hard to get perfectly smooth but if you cut a tongue depressor to the right size and use the rounded end, you can get a nice smooth flat ramp out of it. You'll need something to keep the permatex from sticking to the tongue depressor. I use spit but you can also use a soap and water solution. Would love to know where to find the liquid stuff stefan is talking about in the US. But until then, do what you gotta do.
__________________
www.vorra.org

MINO Racing
JetMD is offline   Reply With Quote
Old 04-01-2008, 01:16 PM   #9
Moderator
 
mxwrench's Avatar
 
Join Date: Jul 2004
Location: Victorville, CA USA
Posts: 429
Trader Rating: 1 (100%+)
Default

Threebond 1211 is what I use. Flows perfectly smooth. It is white colored.
Only downfall is it takes about 24 hrs to harden fully. Use of heat will speed things up a bit (max 140deg f.)

Many US modifiers are using this stuff.

BK
__________________
Brian Kinney
TLR Design Engineer
2016 Sponsors: Team Losi Racing, AKA Tires, Orion, Nitrotane, Horizon Hobbies, Fast RC Paint.
mxwrench is offline   Reply With Quote
Old 04-01-2008, 01:34 PM   #10
Tech Master
 
JetMD's Avatar
 
Join Date: Jan 2006
Location: Richmond VA
Posts: 1,172
Trader Rating: 1 (100%+)
Default

That stuff looks great. I think i'll give it a try. Thanks!
__________________
www.vorra.org

MINO Racing
JetMD is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Crank Shaft from OS SPEED V-SPEC atomapapa R/C Items: For Sale/Trade 12 10-02-2007 09:13 AM
HoBao Hyper .21 crank shaft.. TeeKuang Malaysian R/C Racers 5 08-28-2007 08:36 AM
Standard crank shaft to SG crank shaft adapter? Fred Perkins Onroad Nitro Engine Zone 5 04-02-2007 11:53 PM
Red RTV sealant to crankshaft mrgsr Onroad Nitro Engine Zone 1 12-11-2006 06:51 AM
Why isn't the Sg crank/shaft the standard RayA Nitro On-Road 5 11-17-2002 09:57 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 11:25 AM.


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