R/C Tech Forums

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

Thread Tools Search this Thread
Old 10-10-2008, 08:57 AM   #1
Tech Master
CanyonCarverR1's Avatar
Join Date: Jan 2008
Location: NorCal
Posts: 1,340
Trader Rating: 13 (100%+)
Default 21-5K vs. 21-5K Tuned

Is there a big difference between the stock 21-5K and the Tuned version?
I'm talking about the Novarossi Tuned version, not a modded version.
CanyonCarverR1 is offline   Reply With Quote
Old 10-10-2008, 04:58 PM   #2
Tech Master
floss's Avatar
Join Date: Oct 2004
Location: Pittsworth, Qld
Posts: 1,141
Trader Rating: 32 (100%+)

The only part difference is a reworked crankshaft and "tuned" lasered onto the cooling head.

Only these 2 parts have a different part number;
Like the 35 PLUS 21 crank. nr. is 85012 while the Tuned version caries the number 85012-T.

the difference are the round edge turbo scoop on the shaft and a better matched piston/sleeve set.......

the performance improvement is very small and hard to notice depending on driver skill..............and especially in offroad where engine power is not as important as it is in onroad classes.........

both statements are copied from Novarossi website forum.....
Model Motorsports
floss is offline   Reply With Quote
Old 10-10-2008, 05:57 PM   #3
Tech Regular
Poppin Fresh's Avatar
Join Date: Jun 2008
Location: NY NY
Posts: 329

+ 1 . . . you won't notice much of a difference. Most motors nowadays are monsters when it comes to power band and this is one of them. It's a very smooth power band distribution which equates to less wheel spin, more traction and less fuel consumption.

What matters most now is a quality engine that's reliable.
Poppin Fresh is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Novarossi engines thread EVOLUTION Onroad Nitro Engine Zone 5459 01-02-2018 09:08 AM
v-spec vs jpx.21 engine comparison Bulldawg RC Nitro Off-Road 36 04-23-2009 10:16 AM
OS .21 VZ-R Version II Engine j3di Onroad Nitro Engine Zone 161 03-30-2009 06:12 PM
GRP tuned 21 vs OS speed 21 big_klemo Nitro Off-Road 10 08-11-2008 08:50 PM
WHY? (OS vs NR question) Turbo Joe Electric Off-Road 10 07-16-2006 09:58 PM
Tamiya M-03 vs. M-04 FrankW Electric On-Road 12 12-20-2005 04:21 PM
ENGINES USED AT ROAR NATS HELLOkitty Nitro On-Road 15 11-12-2005 10:44 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 02:23 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