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 02-21-2010, 12:05 AM   #3436
Tech Initiate
 
Join Date: Jan 2010
Posts: 37
Default Inserts

With the novarossi flash .21 it comes with two inserts 244R1 & 244R2, when would you use these as apposed to the one it comes with?
mrlahey is offline   Reply With Quote
Old 02-21-2010, 07:50 AM   #3437
Tech Elite
 
TommyBlazin's Avatar
 
Join Date: Feb 2009
Location: jersey
Posts: 2,544
Trader Rating: 29 (100%+)
Default

Quote:
Originally Posted by Paulie Bee View Post
Thank You DJ.
No Problem.. when you get a chance give me a call.
paulie, where do you get tornado? i could not find anyone around us <ny> to sell it? thanx

tommy
__________________
Trying my hand at electric in off season...TLR Sct 2.0---Trinity D4 10.5---HobbyWing 120 amp Black Edition---Trinity the "Brick"--Panther tires--Savox
TommyBlazin is offline   Reply With Quote
Old 02-21-2010, 08:44 AM   #3438
Tech Regular
 
Paulie Bee's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jul 2007
Location: New York
Posts: 404
Trader Rating: 2 (100%+)
Default Tornado Fuel

Quote:
Originally Posted by TommyBlazin View Post
paulie, where do you get tornado? i could not find anyone around us <ny> to sell it? thanx

tommy
Hello Tommy:
Brooklyn Hobbies will be carrying Tornado Fuels starting this year. Please call Richie to place your orders so he includes you in his next order.
__________________
Thank You...
SERPENT AMERICA & DESOTO RACING
VP POWERMASTER RACING FUELS, Dean Isaac Paint Schemes,
PT RC Racing Oils
Paulie Bee is offline   Reply With Quote
Old 02-21-2010, 10:19 AM   #3439
Tech Champion
 
Team Kamikaze's Avatar
R/C Tech Elite Subscriber
 
Join Date: Apr 2006
Location: 我的名字是沈先生。我是中国人, 居住美国
Posts: 8,868
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by mrlahey View Post
With the novarossi flash .21 it comes with two inserts 244R1 & 244R2, when would you use these as apposed to the one it comes with?
Those 2 Venturis are designed to help make more runtime, if you look at the Inner diameter, the hole is oval shaped which will restrict airflow more than a regular round shaped venturi without loosing power, but will allow you to lean the HSN more.
__________________
Home of the Kamikaze Driver's Development Program = guaranteed podium finish
Kamikaze Toys and Hobbies Inc.
Follow us here on Facebook!
Team Kamikaze is offline   Reply With Quote
Old 02-22-2010, 07:19 AM   #3440
Tech Elite
 
TommyBlazin's Avatar
 
Join Date: Feb 2009
Location: jersey
Posts: 2,544
Trader Rating: 29 (100%+)
Default

sweet, i have to call him on that new 5 comin out as well, should be a interesting season,if that canarsie loc works out!! thanx again paulie..

tommy
__________________
Trying my hand at electric in off season...TLR Sct 2.0---Trinity D4 10.5---HobbyWing 120 amp Black Edition---Trinity the "Brick"--Panther tires--Savox
TommyBlazin is offline   Reply With Quote
Old 02-22-2010, 02:34 PM   #3441
Tech Master
 
Join Date: Feb 2004
Posts: 1,078
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by Geberit View Post
Hello,

Here are some pictures of the internal parts of FLASH .12 and 353S! The motors look from the outside practical the same but on the inside it's a different story! You have to look in detail, because the tiny changes make a big difference on this small engines.

Flash.12 parts are on the right side in the picture!

Cheers

Are the cranks different stokes? The first pic makes them look a little different. Outside of a little work(modding) on the crank they look very close.
Joe Maxey is offline   Reply With Quote
Old 02-22-2010, 11:32 PM   #3442
Tech Addict
 
Geberit's Avatar
 
Join Date: May 2009
Posts: 744
Default

Quote:
Originally Posted by Joe Maxey View Post
Are the cranks different stokes? The first pic makes them look a little different. Outside of a little work(modding) on the crank they look very close.
The Cranks are different! The ''Weight's'' are very differently grinded for such a small item I would say it's a huge difference. And the Flash Crank is polished.

See picture...

Cheers
Attached Thumbnails
Novarossi engines thread-n12.jpg  
Geberit is offline   Reply With Quote
Old 02-22-2010, 11:59 PM   #3443
Tech Master
 
Join Date: Feb 2004
Posts: 1,078
Trader Rating: 13 (100%+)
Default

It looks like the pin is lower on the flash crank. I can see the dremal job. I was more talking the rod pin placement on the crank.
Joe Maxey is offline   Reply With Quote
Old 02-23-2010, 12:32 AM   #3444
Tech Initiate
 
Join Date: Nov 2008
Location: Germany
Posts: 25
Default

Quote:
Originally Posted by Geberit View Post
The Cranks are different! The ''Weight's'' are very differently grinded for such a small item I would say it's a huge difference. And the Flash Crank is polished.

See picture...

Cheers
Looks like the Tuned 353'09 Crank! The part no. is the same,so their should be no differents.

The Sleeve,Conrod,Crankcase and Carb are different to the 353'09.
seb1109 is offline   Reply With Quote
Old 02-23-2010, 12:47 AM   #3445
Tech Addict
 
Geberit's Avatar
 
Join Date: May 2009
Posts: 744
Default

Quote:
Originally Posted by seb1109 View Post
Looks like the Tuned 353'09 Crank! The part no. is the same,so their should be no differents.

The Sleeve,Conrod,Crankcase and Carb are different to the 353'09.
I think Novarossi made some mix up with the part numbers, pictures ... The Cranck from the 353S/C (Steel or Ceramic) is from the same batch as the Flash one. Only that the Flash Cranck is aditionaly Tuned/Modified. And the Flash Crank is the same as the Crank from last years 353 09 Tuned!

By
Geberit is offline   Reply With Quote
Old 02-23-2010, 02:30 AM   #3446
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 5,549
Send a message via ICQ to Roelof
Default

Optical grindings to make it look different does not say it will make a difference. The main difference must be found in the timings.

If the timing and messurements are the same as the older engine why not give it the same product number.
__________________
Speed is only fiction but a 130+km/h MRS4 is for real.
Roelof is online now   Reply With Quote
Old 02-23-2010, 03:52 AM   #3447
Tech Addict
 
Geberit's Avatar
 
Join Date: May 2009
Posts: 744
Default

In a two stroke engine itís all about the fuel/air mixture flow (laminar/turbulent or mixed) and to achieve the optimal flows itís always in the inner parts shape. The different timings are achieved through different positions and dimensions of holes in the sleeve! There are some softwareís to calculate the flow and optimizing it but in the end itís always down to testing on the track.

The debate between engineers still continues regarding polishing or not polishing the inner parts of an engine. If you polish them you will have less inner friction and save some energy that is necessary to turn the engine. But on the other hand if you have a rougher surface the air and fuel will mix better and the mixture will burn more efficiently!

So if you polish parts in the inner of an engine you have to know which parts you have to polish to make a difference!

Cheers
Geberit is offline   Reply With Quote
Old 02-23-2010, 04:21 AM   #3448
Tech Elite
 
Pattojnr's Avatar
 
Join Date: Apr 2006
Location: Perth Australia
Posts: 4,594
Trader Rating: 19 (100%+)
Default

Quote:
Originally Posted by Geberit View Post
In a two stroke engine itís all about the fuel/air mixture flow (laminar/turbulent or mixed) and to achieve the optimal flows itís always in the inner parts shape. The different timings are achieved through different positions and dimensions of holes in the sleeve! There are some softwareís to calculate the flow and optimizing it but in the end itís always down to testing on the track.

The debate between engineers still continues regarding polishing or not polishing the inner parts of an engine. If you polish them you will have less inner friction and save some energy that is necessary to turn the engine. But on the other hand if you have a rougher surface the air and fuel will mix better and the mixture will burn more efficiently!

So if you polish parts in the inner of an engine you have to know which parts you have to polish to make a difference!

Cheers
you will always gain more performace from a timing change rather than polishing this or that. i have tried it. and the better motor was the one wit just a timing change. but if you change the timing and do some polishing, then its better again. a lighter crank will always create more overall power with the right timings. so all the dremmel work on the front can do is lighten things up. then you have a more powerfull motor and you can conserve fuel buy using only what you need to.
these are just my thaughts, but i have also put them into practice. with great results.
__________________
Serpent - Walter RC
Serpent E Power ..... Serpent 747 Reds M3T
Serpent 966-TE Reds M7T .... S411ERYX Speedpassion 3.5T, T-Shox
Serpent 811-TE REDs R5T
Pattojnr is offline   Reply With Quote
Old 02-23-2010, 05:06 AM   #3449
Tech Addict
 
Geberit's Avatar
 
Join Date: May 2009
Posts: 744
Default

Hey Pattojnr,

You are right regarding the timing. I would be interested exactly what did you do and how did you know how much to change the ports in the sleeve?

Regarding the Crank I wouldnít touch it, because the last action in the production process is balancing. So if you modifying it you can ruin the balance of the crank. The result can be shorter life time of the bearings or worse breaking of the bearings.

But anyway always when you tune an engine (assuming you are doing it right) you shorten its life time because you expose it to greater stress.

The power of engines in these days is way over what materials can handle! In the future the manufacturers donít have many options to get more power. If they increase power with existing materials the life times of engines will be shorter and shorter. So the main point is to focus on stronger materials that are able to withstand more stress. But this will mean more costly engines for us.

By
Geberit is offline   Reply With Quote
Old 02-23-2010, 05:20 AM   #3450
Tech Elite
 
Riketsu's Avatar
 
Join Date: Aug 2004
Location: Puerto Rico
Posts: 2,393
Trader Rating: 29 (100%+)
Send a message via AIM to Riketsu
Default

Quote:
Originally Posted by Geberit View Post
The power of engines in these days is way over what materials can handle! In the future the manufacturers donít have many options to get more power. If they increase power with existing materials the life times of engines will be shorter and shorter. So the main point is to focus on stronger materials that are able to withstand more stress. But this will mean more costly engines for us.

Unless you decrease the components weight, therefore less stress.
Riketsu is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sirio engines thread EVOLUTION Offroad Nitro Engine Forum 2824 04-29-2014 11:58 AM
Axial Engines thread Axial Racing Onroad Nitro Engine Zone 164 10-06-2008 06:48 PM
RB engines thread CraigM Nitro Off-Road 7 01-05-2008 11:57 AM
JP Engines Thread DOMOisCOOL Onroad Nitro Engine Zone 2 02-16-2004 06:00 AM
OS engines thread EVOLUTION Onroad Nitro Engine Zone 44 02-11-2004 07:28 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 08:16 AM.


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

SEO by vBSEO 3.5.0