R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 09-24-2009, 01:09 PM   #1
Tech Adept
 
j8ight13's Avatar
 
Join Date: Aug 2009
Location: Philadelphia,PA
Posts: 177
Trader Rating: 1 (100%+)
Default Head Shim(vspec promod&jx21)

I just picked up the VSPEC ProMod and the Ninja JX21. I run 25% Trinity fuel and wanted to know if i needed to add that extra head shim that the mills come with. I asked a few people around the track. Some say you do and others say it isn't needed. So my question is. Do I need to add that extra head shim or will it be okay with the factory shimming? Thanks!!

-John
__________________
Team Losi/8ight 2.0-8ight-T 2.0 Hot Bodies/D8
Nova +4/ GRP MRT .21/GRP .21/GRP MRT .28/Ninja JX21/OS V-spec PROMOD
Hitec 7954HV,7955/ JR 9100s-t/ JR 8800s-t
GRP 2053, RE10, RE11, NOVA9901
DX3S/M11x
j8ight13 is offline   Reply With Quote
Old 09-24-2009, 01:19 PM   #2
Tech Champion
 
losi_racer's Avatar
R/C Tech Elite Subscriber
 
Join Date: Nov 2008
Location: mesa,az
Posts: 6,470
Trader Rating: 25 (100%+)
Default

Quote:
Originally Posted by j8ight13 View Post
I just picked up the VSPEC ProMod and the Ninja JX21. I run 25% Trinity fuel and wanted to know if i needed to add that extra head shim that the mills come with. I asked a few people around the track. Some say you do and others say it isn't needed. So my question is. Do I need to add that extra head shim or will it be okay with the factory shimming? Thanks!!

-John
its fine. Run it with stock shims. i running 30%
__________________

Byron Fuels/AKA Tires/Radiopost/TKO/Viper Rc/Dialed Inc/Empire Metal Product/Advantage Racing Products
losi_racer is offline   Reply With Quote
Old 09-24-2009, 01:58 PM   #3
Tech Adept
 
Reno's Avatar
 
Join Date: Aug 2009
Location: Fort Dodge, IA
Posts: 187
Trader Rating: 16 (100%+)
Default shims

no extra shim is needed. if you do add the shim you may get more run time, less power. always a trade off.
Reno is offline   Reply With Quote
Old 09-24-2009, 02:29 PM   #4
Tech Elite
 
jpalessi's Avatar
R/C Tech Elite Subscriber
 
Join Date: Feb 2008
Location: SoCal
Posts: 4,747
Trader Rating: 55 (100%+)
Send a message via AIM to jpalessi Send a message via Skype™ to jpalessi
Default

the OS engines come stock shimmed for 30%... if you run lower nitro content you would want to remove a shim NOT add one.. stock there should be one .008 silver shim (stuck to button), and one .004 copper.
__________________
Joe Alessi
www.Lucky7RC.com

Last edited by jpalessi; 09-24-2009 at 03:58 PM.
jpalessi is offline   Reply With Quote
Old 09-24-2009, 06:45 PM   #5
Tech Addict
 
Join Date: May 2009
Location: North East PA
Posts: 563
Trader Rating: 28 (100%+)
Default

j8ight13 congrats on your new mills. I know for a fact that your gonna love that ninja at least I love mine. Like we talked about at the track sunday I run my ninjas stock (for now) on 30% and never removed any shims and they scream and never had any problems what so ever. Well what mill is going in what machine? Ninja in the truggy and the OS in the buggy or vise versa. Are you going to be able to get them broke in and ready to race sunday? well good luck and hope to see ya sunday if all goes well. O yea now that you have these hot new mills your going to need a couple of hot new custom painted lids. Let me know maybe I can help ya out with the custom painted lids. I have a couple of new ideas that I have been wanting to paint up
Bob
8secnotch is offline   Reply With Quote
Old 09-25-2009, 05:56 PM   #6
Tech Adept
 
j8ight13's Avatar
 
Join Date: Aug 2009
Location: Philadelphia,PA
Posts: 177
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by 8secnotch View Post
j8ight13 congrats on your new mills. I know for a fact that your gonna love that ninja at least I love mine. Like we talked about at the track sunday I run my ninjas stock (for now) on 30% and never removed any shims and they scream and never had any problems what so ever. Well what mill is going in what machine? Ninja in the truggy and the OS in the buggy or vise versa. Are you going to be able to get them broke in and ready to race sunday? well good luck and hope to see ya sunday if all goes well. O yea now that you have these hot new mills your going to need a couple of hot new custom painted lids. Let me know maybe I can help ya out with the custom painted lids. I have a couple of new ideas that I have been wanting to paint up
Bob
Sounds good Bob. Just wanted to be on the safe side so I wanted to double check and make sure. I'd love some new lids man. Let me know a price for both. I can't wait to see the new ideas you have!

Thanks everyone who replied!!
__________________
Team Losi/8ight 2.0-8ight-T 2.0 Hot Bodies/D8
Nova +4/ GRP MRT .21/GRP .21/GRP MRT .28/Ninja JX21/OS V-spec PROMOD
Hitec 7954HV,7955/ JR 9100s-t/ JR 8800s-t
GRP 2053, RE10, RE11, NOVA9901
DX3S/M11x
j8ight13 is offline   Reply With Quote
Old 09-26-2009, 08:57 AM   #7
Tech Master
 
NITRO 540's Avatar
 
Join Date: Apr 2009
Location: Stafford Va.
Posts: 1,029
Trader Rating: 10 (92%+)
Default

My past 2 motors i put in the extra shim that it came with.
1 I found out that for the first gallon motor temps stay consistent. easier break inn.
2 I found out that it still has a ton of power. no body can run me down
3 I found out that the longer i run in close to the 2 gallon mark fuel milage is getting better.
4 I get 10.5 min run time. running truggy
5 Take the shim out after 2 gallons.Its like a brand new motor.

Please try it you will not regeret it.
NITRO 540 is offline   Reply With Quote
Old 09-26-2009, 04:51 PM   #8
Tech Master
 
blade954's Avatar
 
Join Date: May 2009
Location: Perth, Western Australia
Posts: 1,199
Trader Rating: 23 (100%+)
Default

Yep Im sort of the same I'll put a extra head shim in just for run in to help elevate stress in the "machining in" of the engine then i take the shim out, I have done that with all my engines.
__________________
HEI | Xray | Hudy | Ko Propo | FX- Engines | Novak |
Ryper Hobbies | AKA | Byrons | Blade Grafix
blade954 is offline   Reply With Quote
Old 09-26-2009, 09:31 PM   #9
Tech Adept
 
j8ight13's Avatar
 
Join Date: Aug 2009
Location: Philadelphia,PA
Posts: 177
Trader Rating: 1 (100%+)
Default

I already started to run my mills, but I was thinking about putting in the shim to be on the safe side. I ended up switching to byrons 25% right before i started running them. Cant hurt it to throw it in after 3/4th of a gallon right? Thanks guys!!
__________________
Team Losi/8ight 2.0-8ight-T 2.0 Hot Bodies/D8
Nova +4/ GRP MRT .21/GRP .21/GRP MRT .28/Ninja JX21/OS V-spec PROMOD
Hitec 7954HV,7955/ JR 9100s-t/ JR 8800s-t
GRP 2053, RE10, RE11, NOVA9901
DX3S/M11x
j8ight13 is offline   Reply With Quote
Old 09-26-2009, 11:39 PM   #10
Tech Master
 
TonysScrews's Avatar
 
Join Date: Jan 2006
Location: Central NJ
Posts: 1,660
Trader Rating: 13 (100%+)
Default

Don't add the shim with the 25% fuel. Like Joe said above the motor comes shimmed stock for 30% fuel so you do NOT want to add any more shims.
__________________
Tony P.

Tonys Screws LLC
http://www.tonysscrews.com
High Grade Alloy Steel Screws, Screw Kits and Mugen Parts
TonysScrews is offline   Reply With Quote
Reply



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 05:39 AM.


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