Originally Posted by gashuffer (Post 8964555)

INS boxes do not change the performance of an engine like stated it just reduces unwanted noise. Most 1/8 tracks require them, too many complaints.

Originally Posted by williamw (Post 8964731)

3 chamber pipes like the ones required by EFRA probably make a bigger difference to get the noise down. I don't know if ROAR requires them yet, do you know Juan?

Originally Posted by 1FastVW (Post 8964812)

I just picked up this combo for my IGT2....I understand this should be a killer combination. Any one on here run this and any break-in tips? Tx.

Originally Posted by -R2- (Post 8964816)

OFNA black shirts for sale on For Sale Thread.

http://www.rctech.net/forum/r-c-item...rts-black.html

Originally Posted by Pit-racer (Post 8965211)

We know you posted that already.:weird:

Originally Posted by YANMAN (Post 8964887)

I have to run one in my .12 touring car. I can go 5:30 with the INS box and can hardly make 5 min without it. So, needless to say I run mine all the time.

Originally Posted by -R2- (Post 8965259)

And I will keep doing it.

Originally Posted by JLock (Post 8964900)

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.

Originally Posted by whipnet (Post 8965407)

MMMMMMM Good!

http://f00.inventorspot.com/images/1...30036-spam.jpg

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Originally Posted by bobbyblaze (Post 8966388)

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

Originally Posted by Pit-racer (Post 8968481)

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.

Originally Posted by Pit-racer (Post 8968481)

I believe our class is officially called the "1/8th Super GT" by R.O.A.R.

Originally Posted by williamw (Post 8968807)

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. :eek:

Originally Posted by Pit-racer (Post 8968988)

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.:nod:

Originally Posted by Jspeed (Post 8964288)

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. ;)

Originally Posted by Tabushi (Post 8969560)

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

Originally Posted by Jspeed (Post 8969916)

Pato,

Have you ever replaced the factory stock air cleaner/filter from a real 1:1 car with a free flowing aftermarket unit? Did you hear a difference in the exhaust tone on your car?

This is not any different with our toy cars. The INS Box will reduce the intake sound and help to reduce the overall exhaust note of the car. Physics is Physics, it can’t be intelligently argued against.

Any slight reduction in overall noise levels of the “GT Open” class might be a good thing for this specific race we’re talking about; for the reasons I’ve stated before about the event location and the audio dynamics of the facility in question.

So please Pato, try to understand that we’re only talking about maybe using the INS in the “GT Open Class” at the Ipanema US GT event at this specific venue only.

The other alternative is putting restrictions on actual exhausts like ROAR, EFRA or IFMAR does and I personally don’t like that type of philosophy for our US GT racing event, ok. :nod:

Thanks for your input, experience and understanding of North American style of GT racing. ;)

Originally Posted by whipnet (Post 8969533)

GO BRUSHLESS!! (Sorry, had to) :)

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Originally Posted by spooky 1 (Post 8969385)

That looks like the Ofna cleaner, and yes we have been using those.

Originally Posted by Pit-racer (Post 8970064)

I know maybe someday soon. They are awesome.:nod:

Originally Posted by Tabushi (Post 8970028)

1:1 carb throats are way different in sound v/s rc ones,

Pato

Originally Posted by TommyBlazin (Post 8971103)

after thought of hearing about the boxes, i came up with 2 observations id like to share?

<1> Ins boxes in 1/8 onroad, the motors are sticking thru body therefore, the motor gets ampule amounts of air flow, inside the body when i put on a ins box, didnt look to promising,as in 1/8 onroad AND touring the motors are configured differently,sideways so the air can direct right ontop motor head and the ins box is next to it, NOT in front blocking air passage. but with the gt, the air filters are head on with any possible air flow.I think it might cause alot of grief w/overheating issues!


<2> dont you think the large bodies of the gt class by itself work as a ins box? if u think about it, the motor is "buried" in there, and the body is doing same purpose, im just more concerned with not getting proper airflow over head of motor, ESPECIALLY the guys <like me> who run .21 on road motors with the small heads...

i will take a pic tomorrow and show you what i mean if anyone doesn't understand with what im saying here.

food for thought:tire: