R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 04-14-2011, 07:08 PM   #5656
Tech Master
 
bobbyblaze's Avatar
 
Join Date: May 2007
Location: Georgia
Posts: 1,565
Trader Rating: 1 (100%+)
Send a message via Yahoo to bobbyblaze
Default

Quote:
Originally Posted by JLock View Post
So far, ROAR is only requiring the INS box for the carb. I believe three chamber pipes are not legal for their sanctioned races but someone else a little closer to ROAR will have to answer/vouch for that one.
I beleive you are right on the 3 chamber pipe...i remember when the jp-3 pipe came out they didn't agree with it so later on ofna came out with the jp-4 w/EFRA# on it where the jp-3 didn't
__________________
Arrma Nero 6s, Ofna DM-1 Pro
Traxxas Revo 3.3, Traxxas T-Maxx 3.3, Traxxas Jato 3.3
Traxxas Slash Platinum, Traxxas Slash 2WD
Bend The Rules--Rule The Bends
bobbyblaze is offline   Reply With Quote
Old 04-14-2011, 07:44 PM   #5657
Tech Elite
 
Pit-racer's Avatar
 
Join Date: Aug 2001
Location: Cali/Texas
Posts: 2,268
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by whipnet View Post
MMMMMMM Good!



*
lol
__________________
Team Misfits / www.igthobbies.com / Desoto Racing / Veytrex.com / JZRacing / RcShox / IGT8 '17
Pit-racer is offline   Reply With Quote
Old 04-15-2011, 06:34 AM   #5658
Tech Elite
 
JLock's Avatar
 
Join Date: Nov 2001
Location: North Dallas, TX
Posts: 4,418
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by bobbyblaze View Post
I beleive you are right on the 3 chamber pipe...i remember when the jp-3 pipe came out they didn't agree with it so later on ofna came out with the jp-4 w/EFRA# on it where the jp-3 didn't
Since ROAR hasn't posted their 2011 rulebook to their website, I reviewed what they have in their 2010 rules concerning exhausts for nitro fuel classes. It doesn't specifically state that a 3-chamber pipe can't be used, they just state that the muffler/tuned pipe must be ROAR/IFMAR approved for all of their sanctioned events (rule 9.2.4.2)

This is what I did see in regards to INS boxes:

9.3.7 Inlet Noise Silencer device "INS" box shall be required for level 3,4 and 5 event
for on-road 1/8th scale competition. Roar will maintain an approved list of
acceptable devices available on the "Approvals" area of the ROAR web site. No
performance modifications will be allowed to the INS box. Modification will be
determined by comparison to sample device as provided by the manufacturer
and under control of a ROAR representative. Tolerance for this purpose will be
+/- .1mm.


So, for the upcoming race in Texas in May (Texas Biggie), I have already proposed the question about INS box use for the GT cars with the SWCS committee putting on the race. The race is a ROAR sanctioned level 3 race which is why the INS box issue was even brought up.
__________________
Texas 5
It's not what you know; it's what you can prove.
The only thing that is for sure is that nothing is for sure!!!
The needs of the many outweigh the needs of the few, or the one.
There are 2 things in life that are infinite: the universe and stupidity.

Last edited by JLock; 04-15-2011 at 06:46 AM.
JLock is offline   Reply With Quote
Old 04-15-2011, 06:45 AM   #5659
Tech Elite
 
JLock's Avatar
 
Join Date: Nov 2001
Location: North Dallas, TX
Posts: 4,418
Trader Rating: 3 (100%+)
Default

If we in the GT community get use to using INS boxes now, it will make it easier to transition over to ROAR races whenever they make and institute rules for the class. Why should we wait and follow when we can take the lead and set the precedent for our class.
__________________
Texas 5
It's not what you know; it's what you can prove.
The only thing that is for sure is that nothing is for sure!!!
The needs of the many outweigh the needs of the few, or the one.
There are 2 things in life that are infinite: the universe and stupidity.
JLock is offline   Reply With Quote
Old 04-15-2011, 07:13 AM   #5660
Tech Elite
 
Pit-racer's Avatar
 
Join Date: Aug 2001
Location: Cali/Texas
Posts: 2,268
Trader Rating: 4 (100%+)
Default

I believe our class is officially called the "1/8th Super GT" by R.O.A.R. So by wording alone we are no obligated to have a ins box in our cars. But it will not hurt, our cars can be loud.
__________________
Team Misfits / www.igthobbies.com / Desoto Racing / Veytrex.com / JZRacing / RcShox / IGT8 '17
Pit-racer is offline   Reply With Quote
Old 04-15-2011, 07:37 AM   #5661
Tech Elite
 
JLock's Avatar
 
Join Date: Nov 2001
Location: North Dallas, TX
Posts: 4,418
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by Pit-racer View Post
I believe our class is officially called the "1/8th Super GT" by R.O.A.R. So by wording alone we are no obligated to have a ins box in our cars. But it will not hurt, our cars can be loud.
So, lets just use the INS box now and get use to it before ROAR implements the upcoming class. This way, when you go to a ROAR race with your GT car, you will be ahead of the curve.
__________________
Texas 5
It's not what you know; it's what you can prove.
The only thing that is for sure is that nothing is for sure!!!
The needs of the many outweigh the needs of the few, or the one.
There are 2 things in life that are infinite: the universe and stupidity.

Last edited by JLock; 04-15-2011 at 07:49 AM.
JLock is offline   Reply With Quote
Old 04-15-2011, 07:52 AM   #5662
Tech Elite
 
Pit-racer's Avatar
 
Join Date: Aug 2001
Location: Cali/Texas
Posts: 2,268
Trader Rating: 4 (100%+)
Default

My 1/8 Super GT or GT8 for short will have one from now on. Hope it helps the db levels some. I think my neighbors are plotting against me.
__________________
Team Misfits / www.igthobbies.com / Desoto Racing / Veytrex.com / JZRacing / RcShox / IGT8 '17
Pit-racer is offline   Reply With Quote
Old 04-15-2011, 08:26 AM   #5663
Tech Regular
 
Join Date: May 2010
Posts: 442
Trader Rating: 4 (100%+)
Default

For those who think otherwise, INS boxes and 3 chamber pipes are for noise reduction, they do not increase performance. Anytime you limit the amount of air an engine can inhale without decreasing the amount of fuel flow, your engine will run rich. The engine must be leaned out to run properly. That is why you get better mileage.
Restricting the airflow with a smaller carb insert does the same thing (offroad racers all do this now, fuel mileage means less fill ups, time saved, the engines are more powerfull than needed for offroad racing). The restrictors probably reduce noise somewhat also.
Less fuel and less air equals less power.
williamw is offline   Reply With Quote
Old 04-15-2011, 08:28 AM   #5664
Tech Elite
 
Jspeed's Avatar
 
Join Date: Oct 2006
Location: America!
Posts: 3,513
Default

Fellas, I only posted on the INS boxes as a possibility for the 2011 Ipanema US GT National Championships because of the track’s close proximity to the pit seating areas and the echo effects of the track being between two buildings.


On another note, there are some tracks & races where our GT cars run with 1/8 scale & 200mm guys as more or less guests to the event or facility. If they complain about noise from out GT cars, maybe it wouldn’t hurt to use INS boxes to help keep the peace with everyone else and welcome more of them to want to help grow our class some more.

Other than that, I really couldn’t care less if we do or don’t race with them on our GT cars, lol
Jspeed is offline   Reply With Quote
Old 04-15-2011, 08:42 AM   #5665
Tech Elite
 
Jspeed's Avatar
 
Join Date: Oct 2006
Location: America!
Posts: 3,513
Default

Quote:
Originally Posted by Pit-racer View Post
I believe our class is officially called the "1/8th Super GT" by R.O.A.R.
dude, you can believe in fairy tales, unicorns or Tinker bell or call it the "zip boom bah crash" class if it makes you feel happy , but since the beginning its been known as The GT Class since 2007.

Check the name of this thread, "alwaysgottatrytogetthelastwordinpit".

Last edited by Jspeed; 04-15-2011 at 08:53 AM. Reason: Gotta keep things funny, lol ha!
Jspeed is offline   Reply With Quote
Old 04-15-2011, 09:06 AM   #5666
Tech Elite
 
Pit-racer's Avatar
 
Join Date: Aug 2001
Location: Cali/Texas
Posts: 2,268
Trader Rating: 4 (100%+)
Default

So if I was using/racing a gt style body back in my 235mm. days , cause I always love realism, when everyone ran lola style bodies does that make me grandfather of gt style cars?dumbazzjeff
__________________
Team Misfits / www.igthobbies.com / Desoto Racing / Veytrex.com / JZRacing / RcShox / IGT8 '17
Pit-racer is offline   Reply With Quote
Old 04-15-2011, 09:11 AM   #5667
Tech Elite
 
Pit-racer's Avatar
 
Join Date: Aug 2001
Location: Cali/Texas
Posts: 2,268
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by williamw View Post
For those who think otherwise, INS boxes and 3 chamber pipes are for noise reduction, they do not increase performance. Anytime you limit the amount of air an engine can inhale without decreasing the amount of fuel flow, your engine will run rich. The engine must be leaned out to run properly. That is why you get better mileage.
Restricting the airflow with a smaller carb insert does the same thing (offroad racers all do this now, fuel mileage means less fill ups, time saved, the engines are more powerfull than needed for offroad racing). The restrictors probably reduce noise somewhat also.
Less fuel and less air equals less power.
It might be true ... but a lil' less db's don't hurt. Sometimes there are families attending these races, and a happy family leads to more racing. Does any1 know if these will work in our cars? Them being shorter and lighter. ...
__________________
Team Misfits / www.igthobbies.com / Desoto Racing / Veytrex.com / JZRacing / RcShox / IGT8 '17
Pit-racer is offline   Reply With Quote
Old 04-15-2011, 10:37 AM   #5668
Tech Fanatic
 
Join Date: Sep 2008
Posts: 884
Trader Rating: 1 (100%+)
Default

That looks like the Ofna cleaner, and yes we have been using those.
__________________
People spend their lives worrying about death. I'm sliding in broadside h ollering "Wow, what a ride"
spooky 1 is offline   Reply With Quote
Old 04-15-2011, 11:11 AM   #5669
Tech Fanatic
 
whipnet's Avatar
 
Join Date: Dec 2007
Location: Houston, TX
Posts: 994
Default

Quote:
Originally Posted by Pit-racer View Post
It might be true ... but a lil' less db's don't hurt. Sometimes there are families attending these races, and a happy family leads to more racing.
GO BRUSHLESS!! (Sorry, had to)

*
__________________
Beat Your RC Like It Owes You Money!!
http://www.RCCOH.com
whipnet is offline   Reply With Quote
Old 04-15-2011, 11:18 AM   #5670
Tech Elite
 
Tabushi's Avatar
 
Join Date: Feb 2003
Location: Chile - Southamerica
Posts: 3,029
Trader Rating: 1 (100%+)
Send a message via AIM to Tabushi Send a message via Yahoo to Tabushi
Default

Mhhhhh ... i can be wrong but under my experience, if the guys are using "the louder pipes available" even with INS boxes the benefit will not be there, is the combination of EFRA/IFMAR pipes + INS's in Europe that do the job.

Anyway ... those videos have AMAZING SOUND hehehehe ...

cya !

Pato



Quote:
Originally Posted by Jspeed View Post
Patricio,
The reason we’re thinking about them for our GT Open class for the Texas race is because of a few reasons:

A lot of the “GT Open” racers are already running on-road .21 engines with the loudest pipes available (some of them are not legal to be used in IFAR, EFRA & ROAR), just like the 1/8 scales cars, but without INS boxes they’re very loud at the track we'll be running at.

The track at Mike’s has the pit area right up against the side of the track on both sides of the driver’s stand. The track is also sandwiched in between two buildings that trap a lot of noise.

After watching these short videos of a only a few GT cars running a qualifier there, you can hear how loud it was. Watch these videos.

http://www.youtube.com/watch?v=mc7nN...eature=related

http://www.youtube.com/watch?v=u6T-m...eature=related

Now try to imagine three full days of hearing 10 to 12 “Non-INS” equipped GT Open class cars on the track at one time. If the sound didn’t bounce off the two buildings and the pit tables weren’t close to the track, it wouldn’t be much of an issue really.

Add those together and a heavy turnout of GT Open class racers and it could get ruff after a while for everyone.

Those are the reasons we’re considering INS boxes for GT Open only for our race in Texas this year. GT Spec class is fine without INS boxes. Like I said, we're talking about it.

Glad to see you agree about the “no sauce” rule Bro.
__________________
Patricio "PATO" Concha

E-Mail : [email protected]
Facebook : http://www.facebook.com/patoconcha
Whatsapp : +56 9 66165085
Tabushi is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
GT class--buggy-based on road! duneland Nitro Off-Road 5 03-20-2012 11:03 AM
JRX-S based 4wd buggy?? Why was the idea scrapped? cpatel529 Electric Off-Road 33 12-08-2007 06:19 AM
WTB: .21 NovaRossi based on-road engine parts Speed_Racer R/C Items: Wanted to Buy 1 12-26-2006 11:40 AM
WTB: .21 NovaRossi based on-road engine parts Speed_Racer R/C Items: Wanted to Buy 13 09-30-2006 10:31 AM
WTB: .21 NovaRossi based on-road engine parts Speed_Racer R/C Items: Wanted to Buy 8 03-21-2006 01:05 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 11:36 PM.


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