R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 12-30-2005, 06:31 AM   #1
Tech Initiate
 
Join Date: Dec 2004
Location: dalton, ga
Posts: 20
Post head shims

is there a formula or anything to tell you how many shims and the thickness of them to use by the amount of nitro in your fuel? i bought a werks racing /picco .27 that the factory said was shimmed for 30%. and i belive the deck height was.030 if that is true can i safely remove the .010 shim for a total of .020 clearance and run it with 20%. can some one please help me.
harddrive is offline   Reply With Quote
Old 12-30-2005, 11:55 AM   #2
Tech Regular
 
SlobbaTech's Avatar
 
Join Date: Jun 2003
Posts: 423
Default

If you got .030" gap between piston/button by using solder method then it's right and good for 30%. If you measured the shims individually and added them up and also measured button + piston from top of sleeve "method" then this way isn't as accurate and had a lot greater window of human error. If you want to go to 20% then you can remove a .1mm/.004" shim to take deck height down to .026" safely but try to not go below .023".
__________________
Hot Bodies, HPI, Novak Electronics, JR Propo, Lunsford, Skipgear.com, Planet R/C, Vinyl Graphics Unlimited, JConcepts, B-Mods Racing, CRCRC, King's R/C Raceway, Avid R/C, GMK Supply, & Pacific Coast Hobbies.
SlobbaTech is offline   Reply With Quote
Old 12-30-2005, 12:17 PM   #3
Tech Initiate
 
Join Date: Dec 2004
Location: dalton, ga
Posts: 20
Default headshims

i measured the shims individually with a mike- one being 0.10 and the other being 0.22. using 20% fuel can i safely remove the 0.10 shim and just use the one- 0.22?
harddrive is offline   Reply With Quote
Old 12-30-2005, 03:47 PM   #4
Tech Master
 
Join Date: May 2005
Location: michigan
Posts: 1,678
Trader Rating: 14 (100%+)
Default

Quote:
Originally Posted by harddrive
i measured the shims individually with a mike- one being 0.10 and the other being 0.22. using 20% fuel can i safely remove the 0.10 shim and just use the one- 0.22?
Be on the safe side and go spend 1 dollar on some shims. You will find one that is thinner than .10, once you do, put that in along with the .22 and you will be ok.
o.s. power is offline   Reply With Quote
Old 12-30-2005, 07:32 PM   #5
Tech Initiate
 
Join Date: Dec 2004
Location: dalton, ga
Posts: 20
Default head shims

ok thanks guys.
harddrive is offline   Reply With Quote
Old 12-30-2005, 09:43 PM   #6
Tech Regular
 
SlobbaTech's Avatar
 
Join Date: Jun 2003
Posts: 423
Default

You really should measure your deck height by having engine together...no glow plug...take piece of solder and bend into "L" shape and stick it into engine glow plug hole...turn engine over once by hand while holding solder to sleeve wall/side of engine...then measure the solder afetr it's compressed to get your actual deck height. A .1mm shim = .003-.004" and is the thinnest they come.
__________________
Hot Bodies, HPI, Novak Electronics, JR Propo, Lunsford, Skipgear.com, Planet R/C, Vinyl Graphics Unlimited, JConcepts, B-Mods Racing, CRCRC, King's R/C Raceway, Avid R/C, GMK Supply, & Pacific Coast Hobbies.
SlobbaTech is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Head shims for a VZB jrwoodchuck Nitro Off-Road 12 02-16-2008 04:30 AM
Head shims to run 30% in a RB S5 motor. Mpowerz Nitro Off-Road 22 01-12-2008 06:49 PM
OS VZ-B head shims porter Onroad Nitro Engine Zone 0 08-01-2006 08:17 PM
Rb C4 head shims rrgt_kid Onroad Nitro Engine Zone 1 03-06-2004 02:59 AM
head shims and 30% question nitroaddict Nitro On-Road 4 11-12-2003 08:44 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 06:32 AM.


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