R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 07-13-2009, 05:34 AM   #1
Tech Regular
 
Join Date: Apr 2009
Location: louisville,ky
Posts: 323
Trader Rating: 22 (100%+)
Default Help RB WS7

Hey guys. I have this RB ws7 (not l2g..older version standard plug)that is losng pinch and no longer runs consistantly. However the ceramic bearing, rod, case and the head is in good condtion. I looked into a piston and sleeve kit for it and it was expensive and back ordered every where. I head somewhere that a S5 or S3 p&s will work in the ws7. Is that true? Or does anyone know any the nova motor p&s will work also..Thanks.

P.S. Repinching is not an option. I've had it done and had nothing but bad luck no matter who does it.
nitronutzzz is offline   Reply With Quote
Old 07-13-2009, 05:42 AM   #2
Tech Elite
 
Join Date: Mar 2009
Location: Aurora, Colorado
Posts: 3,644
Default

I would look at getting a new engine - when you replace the piston and sleeve you should alway replace the conrod also - it may "look" in great shape but breaking in and running puts alot of stress on the rod. Even if another piston fits - the engine will not run the same.

Plus by the time you get a piston and sleeve you about 150 short of a new engine
__________________
TLR - Spektrum - Horizon - TLR 8ight 4.0 - TLR 8ight-T 4.0 - TLR 22 4.0 - Orion
token is offline   Reply With Quote
Old 07-13-2009, 09:30 AM   #3
Tech Master
 
8&stuff's Avatar
 
Join Date: Oct 2008
Location: In.
Posts: 1,401
Trader Rating: 55 (100%+)
Default

Quote:
Originally Posted by nitronutzzz View Post
Hey guys. I have this RB ws7 (not l2g..older version standard plug)that is losng pinch and no longer runs consistantly. However the ceramic bearing, rod, case and the head is in good condtion. I looked into a piston and sleeve kit for it and it was expensive and back ordered every where. I head somewhere that a S5 or S3 p&s will work in the ws7. Is that true? Or does anyone know any the nova motor p&s will work also..Thanks.

P.S. Repinching is not an option. I've had it done and had nothing but bad luck no matter who does it.
id definately have to agree with token. however if you download parts explosions and it shows them(part#) to be the same(s5&s3)with corresponding case&crank you could try. i never swapped my s7 and s5 internals and dont remember them to be the same.

also the new rb line of engines all are very similar to old rb specs. if your looking at rebuild i would look the new internals parts list over and see what would work
__________________
Mark Buecker
8&stuff is offline   Reply With Quote
Old 07-13-2009, 09:37 AM   #4
Tech Regular
 
RGraves's Avatar
 
Join Date: Mar 2007
Location: Mayfield, Kentucky
Posts: 370
Trader Rating: 37 (100%+)
Default

Seriously have you tried RayA or Rex Welch to do your pinching? I have had both do motors for me and they run like brand new. I always tell them that I want a "light" pinch and everything seems to run fine, never a problem
__________________
-It is more blessed to give than to receive. ~Acts 20:35
-Spec Amsoil, Jerry Welchel or Fabtech Slash
-Team Losi 8ight E- Castle Creations Mamba Monster 2650
RGraves is offline   Reply With Quote
Old 07-13-2009, 10:11 AM   #5
Tech Master
 
8&stuff's Avatar
 
Join Date: Oct 2008
Location: In.
Posts: 1,401
Trader Rating: 55 (100%+)
Default

Quote:
Originally Posted by RGraves View Post
Seriously have you tried RayA or Rex Welch to do your pinching? I have had both do motors for me and they run like brand new. I always tell them that I want a "light" pinch and everything seems to run fine, never a problem
seen he said never had luck with it. but those ceramics and the correct resize for about $20 id surely try it. gaurenteed way it sounds 3 gallons for $20. iv figured it up as $50 per gallon when buying new. ceramics make the engine go for so long. it just dont sound like this ws7 is toast. the internals just need correct pinch. with that theres a possible 5 gallons
__________________
Mark Buecker
8&stuff is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Off Road Thread (ALL SCALES UNITE) suntok2 Manila Racers 18645 01-07-2016 01:13 AM
Trinity EXTECH .21 Fierle03 Offroad Nitro Engine Forum 2130 06-09-2011 07:01 AM
My 1st Truggy Some Questions.. Mercury9 Nitro Off-Road 6 04-13-2009 01:42 PM
Looking for a new .21 engine for offroad buggy. supralative Nitro Off-Road 54 07-31-2008 02:06 AM
looking to get into 1/8th scale nitro trilerian Electric Off-Road 25 01-25-2006 04:27 PM
High end servo debate.... WheelNut Electric Off-Road 56 10-21-2004 07:47 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 07:15 AM.


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