R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 01-18-2008, 12:11 AM   #196
Tech Rookie
 
Join Date: Jan 2007
Posts: 15
Default

thanks Houston, whats the difference performs wise between the two? i'm looking at getting another engine, really like the 21-5 at the minute just didn't know whether to get another or try the 21-5k ?
rc007 is offline   Reply With Quote
Old 01-18-2008, 06:39 PM   #197
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

Quote:
Originally Posted by rc007 View Post
thanks Houston, whats the difference performs wise between the two? i'm looking at getting another engine, really like the 21-5 at the minute just didn't know whether to get another or try the 21-5k ?
a really bad ass all around engine is the plus 21 block with p/s/r set #08536 installed this set has huge vertical transfer ports and a lowered , extremely large rear main intake (big power), but yes the 21-5k does give a little more fuel efficiency and a great powerband , even better with part #28011 turbo underhead
monty
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 11-17-2008, 02:23 PM   #198
Tech Rookie
 
Join Date: Jan 2007
Posts: 15
Default

Hi,

will a 21-5 piston liner and conrod fit straight into a 21-5k crankcase?

thanks
rc007 is offline   Reply With Quote
Old 11-17-2008, 03:30 PM   #199
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

it will , but the diverters in the block make the fuel flow into the combustion chamber do some weird stuff
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 01-04-2009, 01:04 PM   #200
Tech Adept
 
badjams's Avatar
 
Join Date: Jan 2007
Location: Joliet,Illinois
Posts: 237
Trader Rating: 13 (100%+)
Default

will a 21-7 piston/sleeve fit in a 21-5k block and if so how good will it run, thanks also did novarossi make a 21-7 and a 21-7b , not sure because i got the engine used
badjams is offline   Reply With Quote
Old 01-04-2009, 01:18 PM   #201
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

21-7 and 21-7b are pretty much the same thing , if you are going to replace the p/s/r with anything but the 21-5k set use the 821b p/s/r set , it works the best and you will gain a little performance .


the ports will not line up right and you will lose performance .
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 01-04-2009, 01:41 PM   #202
Tech Adept
 
badjams's Avatar
 
Join Date: Jan 2007
Location: Joliet,Illinois
Posts: 237
Trader Rating: 13 (100%+)
Default

cool , i will just use a spare 21-5 case for my 21-7 p/s since i believe they are the same. also how can i tell the difference between a nova 28021/28011 head button used on a 21-7 vs a 28003/28002 head button used on the 21-5 , will the 2 styles interchange?? thanks
badjams is offline   Reply With Quote
Old 01-04-2009, 01:48 PM   #203
Tech Fanatic
 
Bill Wyatt's Avatar
 
Join Date: Oct 2008
Posts: 865
Trader Rating: 2 (100%+)
Default

Just got the second gallon through the Nova 21-5K in the Mugen buggy. Running the Ofna 053 pipe with long header. 12t cb and 48t spur gear (short tight track)

Very pleased with this motor...smooth strong bottom and a very good top end.

2 clutch springs @ 1.1 and one spring @ 1.0

I was having a bad driving day so I ended up in a 10 minute B Main so I went for it...made the whole main with about 30 seconds of fuel in the lines at the end.

temps right at 220-225 rain or shine

idles for days!!

pulled it off Ebay for 230 delivered
Bill Wyatt is offline   Reply With Quote
Old 01-04-2009, 06:31 PM   #204
Tech Master
 
fast11970's Avatar
 
Join Date: Nov 2006
Location: Freeport Texas
Posts: 1,007
Trader Rating: 1 (100%+)
Default

I got one for sale..If you want one PM me..I DO NOT like this Mill!
__________________
MBX6
http://www.racemugen.com
fast11970 is offline   Reply With Quote
Old 01-04-2009, 06:56 PM   #205
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

Quote:
Originally Posted by badjams View Post
cool , i will just use a spare 21-5 case for my 21-7 p/s since i believe they are the same. also how can i tell the difference between a nova 28021/28011 head button used on a 21-7 vs a 28003/28002 head button used on the 21-5 , will the 2 styles interchange?? thanks
the plus 21-5 is a first gen plus before they changed to the double thick top ring in hopes that the pinch will last longer with thicker material . there are the old style with a step on the underside of the button and then the new style which is deeper but uses the same amount of shims and has no step .
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 01-04-2009, 07:11 PM   #206
Tech Champion
 
JAMMINKRAZY's Avatar
 
Join Date: Jun 2007
Location: Pittsburgh PA
Posts: 6,575
Trader Rating: 17 (100%+)
Default

Quote:
Originally Posted by houston View Post
the plus 21-5 is a first gen plus before they changed to the double thick top ring in hopes that the pinch will last longer with thicker material . there are the old style with a step on the underside of the button and then the new style which is deeper but uses the same amount of shims and has no step .
wondered why they changed that. that clears it up. Although I don't see a need for that. the original had crazy/long lasting pinch as it was.
__________________
-Koby Kubrin-
Thanks to my Sponsors:
Serpent America | Team Novarossi | Desoto Racing | Race AKA | Ridgeway Bodies
JAMMINKRAZY is offline   Reply With Quote
Old 01-04-2009, 07:13 PM   #207
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

Quote:
Originally Posted by JAMMINKRAZY View Post
wondered why they changed that. that clears it up. Although I don't see a need for that. the original had crazy/long lasting pinch as it was.
i think the idea was to make em so they broke in faster but lasted just as long .
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 01-04-2009, 07:28 PM   #208
Tech Master
 
sickboy's Avatar
 
Join Date: Mar 2006
Location: Corona, CA
Posts: 1,974
Trader Rating: 72 (100%+)
Default

houston, with tko ceramic rear bearings, are you pulling the shield?
__________________
Tamiya America www.tamiyausa.com
Team TRF www.teamtrf.com
Pro-Line www.prolineracing.com
818Designs.net - TKO
sickboy is offline   Reply With Quote
Old 01-04-2009, 07:34 PM   #209
Tech Elite
 
ezveedub's Avatar
 
Join Date: Aug 2004
Location: Fort Lauderdale, FL
Posts: 2,411
Trader Rating: 14 (100%+)
Send a message via AIM to ezveedub Send a message via Yahoo to ezveedub
Default

Rear bearings have no shields. If your bearing has them, take them off. Only front bearings have shields. Make sure you install them with the balls facing the back.
__________________
Kyosho, Mugen Seiki, Maxy's Fuel, KO Propo
O.S., Ninja JX, Novarossi, RMV
ezveedub is offline   Reply With Quote
Old 01-04-2009, 07:40 PM   #210
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

Quote:
Originally Posted by sickboy View Post
houston, with tko ceramic rear bearings, are you pulling the shield?
call me i need to see which bearings you have , or just send me picks , if they are the sloppy 14.5x26mm bearings , do not install if you are sponsored by jim , get my number from him .
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Novarossi Plus 28-7 Engine Review Sylvain Nitro Off-Road 8 08-28-2008 12:08 AM
Novarossi N21B-2001BF Engine REVIEW Sylvain Nitro Off-Road 11 08-06-2008 06:25 AM
RB .12 R3 RC Review romuald31 Onroad Nitro Engine Zone 2 07-12-2008 01:21 PM
Novarossi NS12TSR1 engine review... Sylvain Nitro Off-Road 0 05-03-2008 07:22 AM
Ninja 12 MRT review romuald31 Onroad Nitro Engine Zone 5 11-21-2007 01:55 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 09:01 AM.


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