R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road > Onroad Nitro Engine Zone

Reply
 
Thread Tools Search this Thread
Old 01-30-2005, 09:50 AM   #331
Tech Prophet
 
InitialD's Avatar
 
Join Date: Feb 2002
Location: MORDOR
Posts: 19,679
Default Re: weard?

Quote:
Originally posted by Brett.w
Ok have i been racing today and it has been very hot, i have run my JP and i only seem to get 4 mins, i was going to lean it a bit to get more milage but its runnning hot and i dont want to lean it anymore. I have checked the plug and the bottom is brown to going black and the coils is bright silver but it looks "burnt" were it touches the edge (bottom) of the plug.

Any ideas about what to do would be great!

i have tried another engine and it does the same thing.
I cannot actually pin point why the engine is overheating. Just guessing here but I'm sure you already know that on a hot day, you need to lean the needles to maintain correct AFR because of less oxygen per volume of air. So that would explain the high fuel consumption...

As for the overheating part, I'd like to know what type of track did you run the engine? Technical or high speed? What plug number did you run? High speed would prefer colder plug like 7TF. Shorter technical tracks you could live with a no. 6. Wrong plug would make the engine overheat and make for higher fuel consumption. But my guess is you're using a hot plug on a hot day which would make fuel consumption high as well as overheating the engine.

Was the car overgeared? Did the engine rev at the top end a lot or were you at 0 to 50% of the throttle most of the time? How was the idle? Rich and difficult to start in the beginning or the idle coming in high after a few rounds?

If the engine revved a lot at top end RPM, then your HSN needle would have been too lean which made the car overheat this time and not the last time previous. If the engine was at mostly 0 to 50% throttle on the track, then your low end would have been too lean to overheat your engine. My 2 cents...
InitialD is offline   Reply With Quote
Old 01-30-2005, 10:43 PM   #332
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default Re: JP Comparison

Quote:
Originally posted by opposite lock
I just got a brand new JP NOVAROSSI 12 S3 MODIFIED and was wondering how they compare to the new JP's?

Are piston & liners etc still available for the older models?

Thanks all.
r u referring to JP FX series ( blue head, black crankcase ) ? JP FX is latest one.
__________________
On Road : Xray NT1 , RX8 , T4 || Mugen Seiki MRX4-R , MTX4 , MTX3 prospec || Tamiya M03 , M04 || Top Racing Sabre FD2
Off Road : Xray XT8 || Hobao Hyper 8
Radio : Futaba 3PKS || KO propo EX-10 eurus
asw7576 is offline   Reply With Quote
Old 01-30-2005, 11:04 PM   #333
Tech Regular
 
Join Date: Mar 2003
Posts: 313
Trader Rating: 5 (100%+)
Default JP Comparison

No I mean the purple head versions
opposite lock is offline   Reply With Quote
Old 01-30-2005, 11:10 PM   #334
Tech Master
 
TRAJ's Avatar
 
Join Date: Mar 2004
Location: Sydney, Australia
Posts: 1,203
Default

Hi

The RS or the NS version?

If NS JP it should have RACE and NS3

If RS JP it should have RACE and S3 writen on the purple head
TRAJ is offline   Reply With Quote
Old 01-31-2005, 12:16 AM   #335
Tech Regular
 
Join Date: Mar 2003
Posts: 313
Trader Rating: 5 (100%+)
Default JP Comparison

It just has RACE S3 on the head
opposite lock is offline   Reply With Quote
Old 01-31-2005, 12:18 AM   #336
Tech Master
 
TRAJ's Avatar
 
Join Date: Mar 2004
Location: Sydney, Australia
Posts: 1,203
Default

That is the RS JP
TRAJ is offline   Reply With Quote
Old 01-31-2005, 12:20 AM   #337
Tech Master
 
TRAJ's Avatar
 
Join Date: Mar 2004
Location: Sydney, Australia
Posts: 1,203
Default

does it have the JPracing name etched on the head aswell?
TRAJ is offline   Reply With Quote
Old 01-31-2005, 12:22 AM   #338
Tech Regular
 
Join Date: Mar 2003
Posts: 313
Trader Rating: 5 (100%+)
Default JP Comparison

I realise this but I am after a comparison with the new JP's.

The internals of mine look mighty fine.
I will completely pull it down and clean it to remove any metal shavings etc and reassemble ready for run in
opposite lock is offline   Reply With Quote
Old 01-31-2005, 12:30 AM   #339
Tech Master
 
TRAJ's Avatar
 
Join Date: Mar 2004
Location: Sydney, Australia
Posts: 1,203
Default

Yes i know you are after a comparison but first we need to know what version it is.

It depends on what size track you race on

On a larger track you wont be able to have the same top end speed as with the NS, X12 and FX series JPs.
TRAJ is offline   Reply With Quote
Old 01-31-2005, 12:53 AM   #340
Tech Regular
 
Join Date: Mar 2003
Posts: 313
Trader Rating: 5 (100%+)
Default JP Comparison

So does the S3 have more torque or just not rev as high?
What is durabilty like ?
opposite lock is offline   Reply With Quote
Old 01-31-2005, 01:08 AM   #341
Tech Master
 
TRAJ's Avatar
 
Join Date: Mar 2004
Location: Sydney, Australia
Posts: 1,203
Default

It has less revs than the newer versions.

Donít get me wrong the smaller-medium track I race on they are just as quick cause the straight is not long enough for the newer JP versions to reach there optimum speed.

Durability is great will last a long time if you take the run in stage carefully and donít rush it.
TRAJ is offline   Reply With Quote
Old 01-31-2005, 02:37 AM   #342
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default Re: JP Comparison

Quote:
Originally posted by opposite lock
So does the S3 have more torque or just not rev as high?
What is durabilty like ?
Those JP actually novarossi base engines. Durability is good especially if you maintain it periodically ( engine cleaning and proper operating temp. )
__________________
On Road : Xray NT1 , RX8 , T4 || Mugen Seiki MRX4-R , MTX4 , MTX3 prospec || Tamiya M03 , M04 || Top Racing Sabre FD2
Off Road : Xray XT8 || Hobao Hyper 8
Radio : Futaba 3PKS || KO propo EX-10 eurus
asw7576 is offline   Reply With Quote
Old 02-02-2005, 02:43 PM   #343
Tech Elite
 
Racing4Evo's Avatar
 
Join Date: Sep 2002
Location: SoCal
Posts: 2,118
Trader Rating: 2 (100%+)
Send a message via AIM to Racing4Evo
Default

All JP engines, past and current, begin life at the Novarossi factory.
Racing4Evo is offline   Reply With Quote
Old 02-13-2005, 03:02 PM   #344
Tech Apprentice
 
Join Date: Sep 2004
Posts: 82
Default

if any one is interested in jpfx motors try pdl racing thats where i got my fx21r-01 at $800 bucks thats with break in and dyno
kooljoe is offline   Reply With Quote
Old 02-13-2005, 06:13 PM   #345
Tech Elite
 
crashed_1's Avatar
 
Join Date: Jun 2003
Location: i love my job
Posts: 4,985
Default Ceramic Bearing

Does anyone know where i can order the ceramic bearing that came with the JP FX? [.12]...Not BOCA please, they don't fit well onto the crankshaft.

Thanx.
crashed_1 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
.:Go Engines vs. Jammin Engines:. lanerbrainer205 Nitro Off-Road 20 12-23-2007 04:46 PM
.12 Engines sale all new pipes too. 6 engines ericsp2 R/C Items: For Sale/Trade 1 08-06-2007 02:19 PM
os engines compared to rb engines rhymster Onroad Nitro Engine Zone 4 08-03-2007 05:13 PM
IDM engines and picco engines foampervert Onroad Nitro Engine Zone 5 11-23-2006 05:36 AM
SH engines crazyjr Onroad Nitro Engine Zone 7 01-20-2006 03:13 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 09:37 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