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03-10-2010 01:29 AM  8 years agoPost 1
Mike545

rrVeteran

gettysburg, pa

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what would happen if id run race gas (110) octane in my gassers? not looking for performance just better smell. I know it has a lower flash point. should be ok.

"always feel thankful..... never entitled"

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03-10-2010 01:39 AM  8 years agoPost 2
Wingman77

rrProfessor

Pulaski Tennessee

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not looking for performance just better smell.
LOL!
A bit more seriously, running higher octane will reduce power slightly, and could also foul out your plug.

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03-10-2010 01:57 AM  8 years agoPost 3
Mike545

rrVeteran

gettysburg, pa

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maybe ill try the coleman fuel

"always feel thankful..... never entitled"

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03-10-2010 02:31 AM  8 years agoPost 4
pphil611

rrApprentice

South Dakota

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fuel
mike have you ever run coleman? Smell is nice but price here $8.36

Spectra-G, MAH, CSM

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03-10-2010 02:53 AM  8 years agoPost 5
Justin Stuart (RIP)

rrMaster

Plano, Texas

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You can buy race fuel such as some from Sunoco for about $10 a gallon that is 93 octane, doesn't decompose over time (turn to jelly), and doesn't smell bad. They make many kinds of racing fuel, and I think the Sunoco 260-GTX is the closest you can get to premium gasoline in an odor free non-leaded race fuel.

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03-10-2010 03:53 AM  8 years agoPost 6
rbort

rrProfessor

Franklin, MA - USA

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Power loss
You will lose power if you go higher octane at the top end and the motor won't run as well. I tested that and can attest to it.

Furthermore, going the other way might mean more power (coleman at 55 octane) but I have no test experience to back it up.

-=>Raja.

MA 1005 Hanson 280, 4220 flts
Spectra 27 3DMax, 3310 flts
Whiplash V1-2 Hanson 300, 1618 flts
Whiplash V2 Hanson 300, 473 flts

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03-10-2010 03:57 AM  8 years agoPost 7
Against Gravity

rrVeteran

Pottstown PA

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Vp Raceing
VP also has a 94 with simalar specs. I think it is also around $10 a gallon.

AG

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03-10-2010 04:24 AM  8 years agoPost 8
Dr. Fibinotchi

rrKey Veteran

Sioux Falls SD

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it depends
The higher the compression and the lower the squash on your motor the more you will be NEEDING a higher octane fuel. You will not lose power in this situation running higher octane.

Are you talking about a non high compression motor running 91 octane Raja with your statement? I hope you are...

-C

If you want others to be happy, practice compassion. If you want to be happy, practice compassion.

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03-10-2010 10:53 AM  8 years agoPost 9
Mike545

rrVeteran

gettysburg, pa

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just a stocker

"always feel thankful..... never entitled"

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03-10-2010 07:16 PM  8 years agoPost 10
4 stroke flyer

rrApprentice

Dowagiac,MI

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The higher the compression and the lower the squash on your motor the more you will be NEEDING a higher octane fuel. You will not lose power in this situation running higher octane
Thanks you for setting that straight. some don't understand this.

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03-10-2010 07:27 PM  8 years agoPost 11
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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WTF is a "squash"

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03-10-2010 07:33 PM  8 years agoPost 12
Mike545

rrVeteran

gettysburg, pa

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piston to head space cr: ratio

"always feel thankful..... never entitled"

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03-10-2010 08:13 PM  8 years agoPost 13
Sean Bosse

rrApprentice

Germantown, MD.

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Carey Shurley, I think by "squash" he means QUENCH AREA, or the total volume of the combustion chamber with the piston at top dead center.

Sean

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03-10-2010 08:38 PM  8 years agoPost 14
C.A.P.

rrApprentice

custer park IL.

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The idea that you will lose power with higher octane, Is some one who does no know anything about gas octane, (Read up on gas octane and it's affects), Think about this, Every race car, Every high performance car, every motorcycle, Every full size Heli & Airplane. Every any type of GASOLINE fuel burning high compression engine runs on higher then 87 octane gas,Period, Do you think any of these engine makers even BMW. has not tested this, And I mean really tested with engineers not Ally mechanics, It is so wrong I can't understand the reasoning behind this, the fact that lower octane has a lower flash point and can cause pinging do to firing to soon because of it's lower flash point, Is known to or should be known to everyone, Higher octane burns slower giving an even burn, less carbon, Do to NO hot spots in the cylinder, The higher compression (that's over 8:1) You should burn a higher octane, The engine will run on lower octane, ,, but it's running better and smoother. needles are easier to work with on higher octane, The gas burns cleaner, and burns almost all of it, meaning less carbon and longer live, Why in the world do you think some warranties, can be lost on you car if you do not run the right octane, Your car maker tells you to run a type of octane to use, like BMW, This just plain fact,On every high compression engines you are shorting the live of your engine, "Fact" higher octane does not make your engine run hotter either, it's the opposite ,the even burn stops the hot spots, Read up on it, Wally

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03-10-2010 08:40 PM  8 years agoPost 15
C.A.P.

rrApprentice

custer park IL.

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Carey, he means the distance between the top of the cylinder and the top of the piston at TDC, Wally

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03-10-2010 08:44 PM  8 years agoPost 16
Justin Stuart (RIP)

rrMaster

Plano, Texas

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What is the compression ratio of these Zenoah engines? How can you recognize "pinging" or "detonation" in a 2 stroke engine? What is the ideal octane rating which will produce the best HP/performance in a Zenoah engine?

I have been told before that lower octane engines will actually produce more power in a smaller engine running at higher RPM because the explosion is "faster". For example, I think the boat guys are running Coleman fuel in their 14,000rpm Zenoahs because the higher octane fuels take too long to ignite.

Any truth to this?

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03-10-2010 08:45 PM  8 years agoPost 17
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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piston to head space cr: ratio
properly known as the sqUIsh or sqUIsh band

squash is a game or a plant

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03-10-2010 08:55 PM  8 years agoPost 18
rc3po

rrVeteran

Danville, Illinois

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Or what I do to those little eight legged creatures that try and invade my presence...
SQUASH EM....But I don't Squish em...

Happay Happay Happay...

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03-10-2010 09:10 PM  8 years agoPost 19
Sean Bosse

rrApprentice

Germantown, MD.

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C.A.P., I'm not sure I agree with you on that. My reason being that the need for a higher octane is detonation resistance. The higher the octane rating, the higher the resistance to detonation or uncontrolled combustion, i.e. the slower the flame front travels through the combustion chamber. When the compression is increased in a given combustion chamber, the flame front travels faster than at a lower compression, hence the need to either retard the ignition timing or increase the octane rating.

Now, on a lower compression engine, where the ignition timing is fixed, increasing the octane rating (slower flame travel) can effect performance because the flame travel is slowed. In our case, with fixed timing, the only option to compensate for this is to lean the motor, which can be a gamble.

This is not to say that an engine will run poorly on a higher octane than what is needed, but it is unnecessary.

I could be wrong as I am not an engineer, but I do have experience with this.

Sean

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03-10-2010 09:25 PM  8 years agoPost 20
Solow1

rrNovice

Gilbertsville,Pa. usa

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fuel
I have been running coleman fuel, 4 years,no problems. I was told years ago that the more octane used, more heat produced.

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