R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 04-10-2009, 01:39 AM   #1
Tech Addict
 
keavze's Avatar
 
Join Date: May 2007
Posts: 590
Default Buggy engine shims and Nitro

hi guys,
i know for .12 onroads engines the usual shims for 16% is 0.4mm, 25% is 0.5mm, etc...

how about .21 offroads engines? what's the usual shims for 16% and 25% nitro?

or nobody uses 16% for .21 offroads?
__________________
>>> the "SNAKE" doesn't bite; it STINGS! <<<
keavze is offline   Reply With Quote
Old 04-10-2009, 10:03 AM   #2
Tech Adept
 
Join Date: Aug 2005
Posts: 178
Trader Rating: 4 (100%+)
Default

every head button is different, so you need to measure your deck height or the distance from the top of the piston to the button. Once you know this, the general rule is .007"-.008" per 10% Nitro. So for 30% ball park is .021"-.024". Many things affect what is optimal like altitude or specific application, but this will get you in the ball park. The actual thickness of the shims is pointless unless you are referencing a specific engine where you know what a given amount of shims gives you for deck height.
M.Cartwright is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Batam RC Kopitiam batamrc Indonesia Racing 3502 07-28-2015 12:14 AM
Sirio engines thread EVOLUTION Offroad Nitro Engine Forum 2824 04-29-2014 10:58 AM
Ninja Engine by GRP ogreasurada Offroad Nitro Engine Forum 1526 09-16-2013 07:13 PM
D21B Buggy Engine dino.tw Onroad Nitro Engine Zone 149 07-19-2006 05:08 AM
newbie .21 nitro question downunder23 Electric Off-Road 8 07-06-2006 10:15 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 07:42 PM.


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