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Old 02-17-2012, 04:53 AM   #31
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Thanks for info guys
Need alot of stuff to get ready
Will call igthobbies
What about the ins box still don't know where
Thanks
I got my INS box from Serpent America.
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Old 02-24-2012, 09:34 AM   #32
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Got my tickets
Will there be practices on Sat early morning? Couldnt get friday off from work
Will there be parts and fuel for sale at the hobby shop or at the track?
What fuel do onroad racers use now? Im used to 30% power master for offroad but I have read somewhere the onroad guys are using 20%

Getting ready for this and am excited
I race offroad and jumping to onroad this race
This will be fun
Thanks
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Old 02-24-2012, 11:10 AM   #33
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well done
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Old 02-24-2012, 11:39 AM   #34
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Got my tickets
Will there be practices on Sat early morning? Couldnt get friday off from work
Will there be parts and fuel for sale at the hobby shop or at the track?
What fuel do onroad racers use now? Im used to 30% power master for offroad but I have read somewhere the onroad guys are using 20%

Getting ready for this and am excited
I race offroad and jumping to onroad this race
This will be fun
Thanks
Yes, there should be a little bit of practice time on Saturday, but not much.
Yes, this is fuel and parts, depending on the cars you are driving, in the hobbyshop.
Sedan uses 16%.
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Old 02-24-2012, 12:49 PM   #35
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Yes, there should be a little bit of practice time on Saturday, but not much.
Yes, this is fuel and parts, depending on the cars you are driving, in the hobbyshop.
Sedan uses 16%.
why 16% are the motors so powerful that it doesnt need more nitro?
Thanks
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Old 02-24-2012, 02:50 PM   #36
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you can run a higher nitro content but you will not make run time with the newer motors! They are made to run 16%, Same with 1/8th scale i use to run nothing but 30% nitro but i now run 25% for the fuel mileage and their is not that big of a difference in power! Some people may not agree but these are my findings through testing different stuff from carb inserts to headers, pipes, carbs just about everything you can test!
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Old 02-24-2012, 03:43 PM   #37
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What effect does the INS box have on tuning. I have never run one before and if they are required , I want to know what to expect. I found I need to run lower nitro at lower altitudes, and colder plugs.
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Old 02-24-2012, 04:43 PM   #38
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this is what I have read about ins box, came from serpent website

Noise problems
Noise is an issue in almost any country, and if it is not yet today, it will be tomorrow. Race tracks have already closed down, or are under threat because of noise problems.
In 1995 IFMAR, the World organization for RC racing, asked the manufacturers to come up with solutions to reduce the noise-level of 1/8 scale gas powered racing cars. Serpent took up the challenge and in close co-operation with the University of Delft, developed the universal Induction Noise Silencing Box, the INS-BOX. In combination with an effective (*) exhaust silencer, the INS-BOX is able to reduce the overall sound level with up to 4 decibels. If 10 cars would be using the INS-BOX at the same time, like in a race, the overall noise-level would drop with 5 to 6 decibels!

Decibels
Noise is measured in decibels. The decibel scale is not linear but logarithmic.
For instance, total silence would be 0 dB, a silent room 45 dB, a person speaking 60-65 dB, a car 80 dB, an airplane 90 dB. From a silent room to an airplane is only doubling the amount of decibels, but what you hear is much more than double the noise.
There are different scales used with decibels. This depends on the type of sound and the environment it is produced in. For noise-level measurements used to set acceptable standards for the human ear, the "A scale" is used.
The noise level depends on the distance between the noise source and the point of measuring. The closer by, the higher the noise level. The standard distance for measuring noise levels of cars and machines is 10 mtrs. The universal norm for industrial noise levels has been set at 80dB(A) at 10 mtrs.
A noise level of 83dB(A) compared to 80 dB(A) is experienced as double the noise by the human ear!

Noise levels
Current 1/8 scale gas powered cars, using IFMAR homologated exhaust pipes are measured at 89-90 dB(A). This high noise level depends very much on the engine rpm. With the ever increasing rpm's, the noise level went up from 84 dB(A) in the early 80-ties, till 90 dB(A) at this moment as engines are now capable of running well in excess of 40.000 RPM.

IFMAR and EFRA
In 1995 IFMAR set a target of 85 dB(A) at 10 mtrs. to be achieved by 1997. With the use of the INS-BOX this can be achieved, providing an effective exhaust silencer is used. Models 082, 089 and the 053 have been found to be effective.
EFRA has asked all the manufacturers of exhaust silencers to issue their exhaust pipes for re-homologation and will publish a new list of silencers that can be used from June 1998 onwards. It is expected that EFRA and a number of their member countries will make the use of an induction noise silencer like the INS-BOX, in combination with a homologated exhaust silencer, mandatory in 1998.

The principle of INS-BOX
RC cars have 2 sources of noise, the exhaust system and the inlet system. With the use of homologated silencers, the exhaust noise has been effectively reduced to 84/85dB(A). The induction noise however, has no silencing device and with the ever increasing rpm's, the induction noise has gone up to close to 88 dB(A).

The 2 noise sources together produce the measured overall noise-level of close to 90 dB(A). It is obvious that reducing the exhaust noise level further would not affect the overall noise level.
Only reducing the induction noise would be effective in terms of overall noise reduction. This is what the INS-BOX does. The box is designed to filter out the 700Hz frequencies and its harmonics. These frequencies are 'weighed' very heavily in the 'A" scale used for measuring the 'industrial noise levels' such as cars. The INS-BOX was designed using complex acoustic formula's to calculate the volumes and shapes of the 2 chambers and the size and length of the holes (pipes) which connect the 2 chambers.

Performance
Because of the optimized design, the INS-BOX unit does hardly affect the performance of the engine, it only reduces the induction noise. The performance was measured in various ways: by taking lap-times (no difference), by using data-logger technology (no difference), and on the test bench (approx. 3% difference). What can be felt is a very little loss of throttle response at low speed. But this will be the same for everybody of course. Running the car with or without the INS-BOX has no influence on the setting of the carburetor, which is proof that the air-flow is not restricted.
Using the INS-BOX has no effect on the engine temperature as it
does not restrict the airflow and the engine is not running leaner.


Usage
The INS-BOX is equipped with a high quality and effective foam filter to clean the air before it enters the engine. Insert the foam filter from the top in the lower case, the rubber filter-grommet must snap between the lips. This provides a firm and positive fixation of the filter. Do not use glue for this purpose too.
The foam filter must be treated with the special filter oil which is included in the set. The INS-BOX is designed for this foam filter. Other foam filters may not fit and should therefore not be used.

The box itself works as an additional protection against dust and can also be used in rainy conditions. It does not provide full protection against heavy water under all circumstances, the foam filter may still get soaked.

Tie the INS-BOX down to the carburetor by wrapping a tie-wrap around the rubber part which fits over the carburetor. After installation on the engine, the top-part of the INS-BOX box can easily be removed by squeezing the lower case slightly, thereby freeing up the upper part. To re-install, gently press the upper part back in the lower case until it snaps into the groove of the lower case.
Do not modify any part of the box as it will have no effect on performance but it will disturb the proper silencing function of the unit and the noise level will go up again.

Loud is Out
Serpent has developed the INS-BOX for all RC racers, independent of the brand of car or engine used. This product is not marketed as a Serpent product, and therefore you will not find our brand name on the INS-BOX.
IFMAR, EFRA and other organizations have already recognized and approved the INS-BOX as an effective noise reduction device. We at Serpent hope that you will appreciate our efforts to reduce the noise level of 1/8 scale racing cars and that you will start using this device, even voluntarily. This is our contribution to a better 'gas on-road' world.


now will read up on the fuel and setups of IGT
thanks for the info guys
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Old 02-25-2012, 04:51 AM   #39
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Originally Posted by spooky 1 View Post
What effect does the INS box have on tuning. I have never run one before and if they are required , I want to know what to expect. I found I need to run lower nitro at lower altitudes, and colder plugs.
You will need to lean the engine more with the ins box on.
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Old 02-25-2012, 07:55 AM   #40
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Oh boy, all the fast 1/8 GT guys are coming, sweet
I'm not fast but I'll be there also.
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Old 02-26-2012, 08:58 PM   #41
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RCPRO National rules for 1/8 GT class had been released:


1/8th IGT Rules:
These rules pertain to the 1/8 off-road based vehicles that feature on-road passenger and road racing body shells.

•IGT cars must be based on current production buggy/truck chassis, drivetrain and suspension components.
•Shaft drive only.
•Non-adjustable centrifugal clutches only – no Centax or adjustable clutches.
•Rubber tires only, no foam tires. Tires cannot extend beyond the body and fender flares may not be added to accommodate larger tires.
•No dish wheels – a minimum of 50-percent of the wheel face must be open.
•17mm hex hubs only – no quick-change hubs.
•Any commercially available “GT/GTP” racecar style/type body. The engine’s cooling head fins can not be exposed from top or sides of body. Rear wing and/or spoiler/flap must be attached to the actual body. (No chassis mounted or “Buggy/Truggy” type wing mounts).
•Maximum of two mechanical disc brakes, which must be mounted to the center. driveshafts/outdrives. No pressurized or electronic braking systems are permitted.
•Maximum of two-speeds – centrifugal, automatic transmissions only.
•Any nitro engine is allowed up to and including .28 engines.
•150cc fuel tank limit.
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Old 02-28-2012, 01:18 PM   #42
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Thanks for the INS info. I have it on the car now and I'll be there to mix it up and have some fun.
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Old 02-28-2012, 01:25 PM   #43
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Default RCPRO SERIES SIGNUP

COME GUYS GET SIGNED UP ON RCSIGN UP. LETS GET THE ENTRY NUMBERS IN.
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Old 02-28-2012, 09:11 PM   #44
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Originally Posted by spooky 1 View Post
Thanks for the INS info. I have it on the car now and I'll be there to mix it up and have some fun.
Where did you get it an what brand

Getting ready for this big race
Now stocking up on tires and foams
Will there be a sportsman class or even lower I might have to be in that
Trying to get into onroad

Thanks for info bassman
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Old 02-29-2012, 10:46 AM   #45
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I ordered my INS box from Serpent America. Weather hasn't let me run with it yet, but that's why I'm heading for Texas next month.
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