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

Piston/ sleeve renewing

Piston/ sleeve renewing

Old 09-23-2008, 05:03 PM
  #1  
Tech Rookie
Thread Starter
 
Join Date: Jun 2007
Location: Southern New Jersey
Posts: 19
Default Piston/ sleeve renewing

Has anybody used this service for their engines??

http://www.osrocketracing.com/pistonsleeve.php

They came highly recommended by a local racer.
Raddman is offline  
Old 09-23-2008, 05:15 PM
  #2  
Tech Master
iTrader: (8)
 
t0adman's Avatar
 
Join Date: Apr 2008
Location: Seattle, WA
Posts: 1,251
Trader Rating: 8 (100%+)
Default

I've yet to have a sleeve pinched but I've heard OS Rocket and RayARacing are both good options. I've read that OS Rocket has "over pinched" some people's sleeves. I'm guessing they would fix it if that were the case. It seems like a good way to get more life out of sleeve though.
t0adman is offline  
Old 09-23-2008, 05:38 PM
  #3  
Tech Master
iTrader: (95)
 
Join Date: Oct 2002
Location: KY
Posts: 1,154
Trader Rating: 95 (99%+)
Default

I've used their services on several engines over the years. It's a great way to extend motor life. Just make sure you heed the instructions and richen it up to break it in again as described.
RobbieS is offline  
Old 09-23-2008, 05:42 PM
  #4  
K_B
Tech Master
iTrader: (70)
 
K_B's Avatar
 
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 1,458
Trader Rating: 70 (100%+)
Default

How much life can ya get from a re-pinch? I imagine results are all across the board...
K_B is offline  
Old 09-23-2008, 05:44 PM
  #5  
Tech Elite
iTrader: (67)
 
22Racer's Avatar
 
Join Date: Mar 2002
Location: Wanamingo Mn
Posts: 3,150
Trader Rating: 67 (100%+)
Default

If you keep the sleeve round when you pinch it you don't need to pinch it as tight as it came new. My break in on the sleeves I pinch is run it run 2 tanks 2hours richer on the track and let her eat. Some have gotten 8 gallons on a pinch.

Rex
22Racer is offline  
Old 09-23-2008, 05:58 PM
  #6  
Tech Initiate
 
Join Date: Jan 2008
Posts: 23
Default

try rayaracing.com . ray does resizing for top racers around the world . great customer service and sets are generally back in 10 days at the latest.
bellinger is offline  
Old 09-23-2008, 08:38 PM
  #7  
Tech Fanatic
iTrader: (27)
 
Allumina's Avatar
 
Join Date: Jul 2008
Location: Sacramento, CA
Posts: 939
Trader Rating: 27 (100%+)
Default

good thread, thanks for poisting it, i've always wanted to know exactly how pinching works, now I know. Thanks to everyone who replied too.
Allumina is offline  
Old 09-24-2008, 09:50 AM
  #8  
Tech Initiate
iTrader: (3)
 
JGray's Avatar
 
Join Date: Aug 2006
Location: Sapulpa OK
Posts: 32
Trader Rating: 3 (100%+)
Default

Get hold of Rick Brake at RBMODS.net. He does great work with quick turn times. He has done mine for the past three years with no problems at all.
JGray is offline  
Old 09-24-2008, 10:03 AM
  #9  
Tech Elite
iTrader: (55)
 
Join Date: May 2002
Posts: 2,719
Trader Rating: 55 (100%+)
Default

osrocket hands down is awesome.
I am not bashing the other companies I jsut ahve not used them due to the fact that I didnt need to.
I send a piston and sleeve to osrocket and they have it back by the weekend.
one thing I do is order a new rod and after break in replace the old one and it is litterally a brand new motor (if not a little better) total ends up costing about 65 bucks after the rod but its literally a brand new motor for that.
I really havent met anyone that didnt approve of his work.
hope this helps
thanks
MO
Mo Denton is offline  
Old 09-24-2008, 06:46 PM
  #10  
Tech Adept
iTrader: (14)
 
Join Date: May 2008
Posts: 142
Trader Rating: 14 (100%+)
Default

how many times can you resize a piston and sleeve.
meno222 is offline  
Old 09-24-2008, 07:00 PM
  #11  
Tech Elite
iTrader: (67)
 
22Racer's Avatar
 
Join Date: Mar 2002
Location: Wanamingo Mn
Posts: 3,150
Trader Rating: 67 (100%+)
Default

Atleast 3 times, depending on how much it is pinched each time.

Rex
22Racer is offline  
Old 09-24-2008, 07:31 PM
  #12  
Tech Master
iTrader: (95)
 
Join Date: Oct 2002
Location: KY
Posts: 1,154
Trader Rating: 95 (99%+)
Default

Originally Posted by meno222
how many times can you resize a piston and sleeve.
This will vary based on the sleeve wall thickness and sleeve material.

The more it is done 2 things happen. The metal gets more pliable and because the diameter is now a little smaller the sleeve will fit in the block just a tad looser. With each pinch it also gets just a tad looser each time. Since the sleeve is now looser it gives the piston the opportunity to "spread" the sleeve back out. This could cause your pinched sleeve to loose compression early if the sleeve material is week. That being said I'd think any decent engine could get pinched 2-3 times with no issues at all.
RobbieS is offline  
Old 03-29-2009, 09:37 PM
  #13  
Tech Fanatic
iTrader: (23)
 
Join Date: Nov 2002
Location: 4373 Creek Road Chaffee,NY 14030 USA (716)783-5198
Posts: 831
Trader Rating: 23 (100%+)
Default RayAracing reconditioning-resizing service

Originally Posted by bellinger
try rayaracing.com . ray does resizing for top racers around the world . great customer service and sets are generally back in 10 days at the latest.
Thanks for the kind words Brian,

I keep an eye on all forums resizing threads, just as you know I keep a keen eye on my work performance on the track.

See you at the new Gleenwood offroad track location in May.



RayA
RayA is offline  
Old 03-29-2009, 10:23 PM
  #14  
Tech Prophet
iTrader: (96)
 
houston's Avatar
 
Join Date: Sep 2004
Location: Sherwood,OR
Posts: 15,844
Trader Rating: 96 (100%+)
Default

if you resize you need to use ray , he invented it and perfected it
houston is offline  
Old 03-29-2009, 11:41 PM
  #15  
Tech Master
iTrader: (33)
 
markt311's Avatar
 
Join Date: Aug 2008
Location: Nashville Tennessee
Posts: 1,393
Trader Rating: 33 (100%+)
Default

I just got a used Vspec that was pinched, I broke it in with a heat cycle method for 6 heat cycles. Now it feels like it doesn't have much compression when it's hot but when you turn it over by hand you can feel almost like a "notch" feeling when the piston goes to TDC so I know the pinch is still tight. I haven't been able to run it much because of the weather but it does seem to want to run a little hot, around 240-250. Does anyone have any ideas on whats going on? I might have it just a bit lean on the top end. First race next weekend so I guess I'll see how she does.
markt311 is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.