Rules for saw

[PHM Racing]

Is there any rules on power adders for nitro or gas motors

 

[PHM Racing]

sorry about the two ads we werent sure that it went on the first time

Mike

 

[_laxmasta2039]

power adders? :blink:

 

[Flyin Rat Sass]

Is that like leaning forward for speed?

 

[PHM Racing]

What i mean is can you do what ever you want tothe motor to make power or is there rules on what you can.

In drag racing there is a outlaw class / run what you brung are the rules like this

Mike :wacko:

 

[apache5056]

In gas, as long as the engine does not exceed the OEM bore and stroke, I do believe anything else goes.

I do know you must use pump fuel, no aviation, cam2, etc.. That and you can not use any type of octane booster or alcohol additives either.

I have no idea what you can and can not do with glow.... <_<

 

[Preston_Hall]

To answer your question, I guess there is no limitation.

IMPBA RULES

Large Scale Gasoline

General Engine Rules for the “LS” Engine classes:

1. The intent of this class is to utilize commercially manufactured gasoline powered 2 and 4 cycle engines.

2. These engines must be equipped with a recoil starter and this starter must be the primary means of starting the engine. Clutches are not mandatory, but those engines not equipped with a clutch must be stopped completely with transmitter controls.

3. Internal and external modifications may be made to the engines major and or minor parts. However, the cylinder and head assembly must be a single unit. No removable heads and /or head buttons allowed.

4. The engine must use a spark plug type ignition. No glow plug or compression induced combustion allowed. All engines must have a positive off‑on switch, or in lieu of this switch, the primary ignition lead must be removed from the spark plug except when in the pits, out of the spectator area, or in preparation for racing.

5. Any size or brand name of carburetor may be used. All engines must be normally aspirated and have a piston ported or reed valve fuel induction system.

6. All engines must have a canister muffler, custom exhaust system or tuned pipe.

Engine classes

Classes Cubic inch Displacement Cubic Centimeter

Displacement

LS27 Up to 1.647cid maximum 27.0cc maximum

LS36 1.648 thru 2.196cid maximum 36.0cc Maximum

Formulas CC x .61 = CID CID divided by .061 = CC

General Engine Rules for the “XLS” Engine Classes

1. The intent of this class is to utilize gasoline powered 2 and 4 cycle engines that do not meet the LS class engine rules, and were designed and built for model boat racing.

2. These engines may be started with a recoil, pull or electric starter. Clutches are not mandatory but those engines not equipped with a clutch must be able to be completely stopped with the transmitter controls.

3. Any and all modifications may be made to the engine. The cylinder and head may be a multi piece assembly and head buttons are allowed.

4. The engine must use a spark plug type ignition, no glow plug or compression induced combustion allowed. All engines must have a positive on‑off switch, or in lieu of this switch, the primary ignition lead must be removed from the spark plug except when in the pits, out of the spectator area, or in preparation for racing.

5. Any size or brand name carburetor may be used. Fuel induction may be piston ported, reed valve, rotor valve, etc.

6. All engines must have a canister muffler, custom exhaust system or tuned pipe installed with an external muffling device installed.

Engine classes

Classes Cubic inch Displacement Cubic Centimeter Displacement

XLS27 Up to 1.647cid maximum 27.0cc maximum

XLS36 1.648 thru 2.196cid maximum 36.0cc Maximum

Formulas CC x .61 = CID CID divided by .061 = CC

Engine/Motor Definitions and Classifications (Basically meaning nitro)

1. Displacement

The cubic inch displacement of a power plant shall be the sum total of the displacement of all cylinders in the power plant. The cubic inch displacement of multi-cylinder engines, two or more engines driving attached together and two or more engines driving separate propellers will be added together to determine the total displacement and thus the class the power will run in. To determine engine class, read calculated engine displacement to three decimal places, drop all remaining figures.

2. Internal Combustion Engine Classes

Class Cubic Inch Displacement Metric Class

A 0.000 thru 0.129 2.1 CC

B 0.130 thru 0.219 3.5 CC

C 0.220 thru 0.300 4.9 CC

D 0.301 thru 0.458 7.5 CC

E 0.459 thru 0.670 11.0 CC

F 0.671 thru 1.830 30.0 CC

Formulas: CC X .061 = CID, CID divided by .061 = CC

Note: For Large Scale Gasoline engine classes see section “I”, Large Scale Gasoline

Fuel restrictions

The use of Tetra Nitro Methane or Hydrazine is illegal in all phases of model boating controlled by IMPBA. Any member found using these would be banned from IMPBA for one year. In addition, he will have to reimburse to IMPBA the entire fuel analyzing costs prior to being allowed to rejoin this organization.

 

[Bob Kensill]

IMPBA requires the use of "pump gasoline" in the gas classes. This allows all racing gasolines that are "pumped" into your container. Additives,including those already in some racing gas,are prohibited,but I have never seen anyone test fuel at a race. Most "good" fuel additives will have a noticeable smell when they burn,so it would be hard to sneak them in. I can,off the record, tell you of one additive that can not be detected with the fuel testing meters,but does give a great boost. Klotz Performance Products makes a product called Coxoc,that is an "oxygen getter" that will improve combustion. I used to use it in my full scale OPC tunnel and it was good for about 2000rpm. It has properties with gasoline fuel similar to those that propylene oxide has with nitro fuel. If you are looking for nitro fuel power increases,post the question and i'm sure you will get bombarded with information.

Bob Kensill

 

[PHM Racing]

Thanks for the info so far preston & bob it's been very helpfull

Mike

 

[Preston_Hall]

I had thought you were talking about turbo or superchargers of sorts. As far as fuel additives go I have only heard of using propylene oxide in the nitro engines. However it doesn't seem to do anything in warmer temperatures.

Now if you convert a gas engine to run metanol or nitro then you can enter it in the non-gas classes.

 

[PHM Racing]

Preston

Is there any rules on superchargers or turbo's in the gas or nitro class

Mike

 

[Preston_Hall]

Not that I can read.

Basically nitro classes are non pump gasoline classes. Any engine goes and it's only classified by size.

Gas classes are pump gas spark ignited basically. They are only separated by size and construction.

 

[Mike]

THanks for the info Preston every little bit helps!!! B)

Mike

 

[PHM Racing]

Sorry forgot to log in.

Mike

 

[lohring]

IN NAMBA or IMPBA is there any reason gas engines can't run with nitro engines? My NAMBA rule book doesn't mention any fuel limitations except in the gasoline classes.

Lohring Miller

 

[Lake S.P.O.R.T.]

All kinds of things you can do with $$$$$. About 20 years ago when there were several people actively chasing the outboard world speed record, this one guy twin turbo charged a V-6 Mecury racing engine. At full boost it put out 520 horsepower. As much as I love unrestricted racing, I would still not want to see turbo charged RC boats for heat racing. This stuff is geting expensive enough.

Mark