R/C Tech Forums

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

Thread Tools Search this Thread
Old 05-09-2010, 03:45 PM   #1
Tech Addict
hdcruzer's Avatar
Join Date: Sep 2009
Location: Pittsburg Ca.
Posts: 732
Trader Rating: 12 (100%+)
Default Pinch Question

Im assuming if my piston will still push the sleeve up I still have pinch left. Am I correct to assume this. Thanks In advance.....
Ofna Late Model-Losi 350-Losi RE 10-Hobbico CS170s
Coldfusion Fuel
Henchman Racing
hdcruzer is offline   Reply With Quote
Old 05-09-2010, 04:46 PM   #2
Tech Elite
22Racer's Avatar
Join Date: Mar 2002
Location: Wanamingo Mn
Posts: 3,094
Trader Rating: 67 (100%+)

Yes it probably still has pinch. Don't worry about pinch so much, as long as it feels like it has compression when turning the flywheel. It should have a nice pop when it turns over.

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 [email protected] Rex Welch
22Racer is offline   Reply With Quote
Old 05-09-2010, 05:39 PM   #3
Tech Elite
Join Date: Mar 2009
Posts: 3,657
Trader Rating: 5 (100%+)

I think it's funny that so many people are so concerned that they are losing pinch. The reality is, my engine will not run it's best until it's gone.

Now. If you can turn the shaft (without a clutch or flywheel) over with your finger easily with the glo plug installed?? Start worrying

really pinch, is not necesarily a good thing. It's still breaking in.
"You are not understanding the fundamental principles of my fragmented personality"

dreaux is offline   Reply With Quote
Old 05-09-2010, 09:48 PM   #4
Tech Initiate
Join Date: Dec 2008
Posts: 40
Trader Rating: 1 (100%+)

will your engine run hotter if you still have alittle metal to metal pinch
speedzone99 is offline   Reply With Quote
Old 05-09-2010, 09:57 PM   #5
Join Date: Jan 2010
Posts: 371
Trader Rating: 5 (88%+)

There are 2 forms of pinch the first is mechanical pinch. This is tested by how hard it is to turn the flywheel over, the second is compression pinch this is noted by the sound the engine makes when coming back down it should make a nice pop sound(varies) the mechanical tightness goes away over time but does not mean that you dont have compression.
carlam is offline   Reply With Quote
Old 05-10-2010, 07:22 PM   #6
Tech Fanatic
Join Date: Nov 2002
Location: 4373 Creek Road Chaffee,NY 14030 USA (716)783-5198
Posts: 775
Trader Rating: 23 (100%+)
Default some pinch

The total seal thru stroke is importand guys

RayAracing piston+sleeve reconditioning-resizing Tooling+Services ALL Buggy, Truggy, Car, and Truck engine models .12 thru .50 since 2001
SHIPPING:4373 Creek Road, Chaffee, NY 14030 USA
PHONE: (716)783-5198 EMAIL: [email protected] SERVICE: http://www.rayaracing.com/
TOOLING: http://www.rayaracing.com/prodtooling.htm
RayA is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
RB Killer 9 Shimming Question Victory Side Nitro Off-Road 47 10-12-2009 07:34 PM
nitro tuning question HookaMega Electric Off-Road 36 12-13-2006 01:17 PM
Question Abt V One R........ lonestar1127 Singapore R/C Racers 104 06-16-2002 09:49 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 10:58 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net