Planet Minis

mx571 · 03-01-2008, 08:53 PM

what gas, i mean octane are you guys running in your pitsters? i have a 08 x4r and it definitely runs better on half pump gas and half race gas.

dood · 03-01-2008, 09:06 PM

If your bike is running better with half race gas mix, your jetting is off.
High octane doesn't make more power, it actually takes away hp because of it's slow burning characteristics.
Run the lowest octane you can with out detonation.
I know plenty of engines out there running 89 octane.

Travisfab · 03-01-2008, 09:14 PM

I run premium grade (91 octane) pump gas in my GPX.

chiro972b · 03-01-2008, 10:13 PM

Quote:

Originally Posted by dood

If your bike is running better with half race gas mix, your jetting is off.
High octane doesn't make more power, it actually takes away hp because of it's slow burning characteristics.
Run the lowest octane you can with out detonation.
I know plenty of engines out there running 89 octane.

Ditto. The whole octane thing is one of the most misunderstood topics in the motoring world.

crwclev · 03-01-2008, 10:46 PM

We're running Trak Tech 110...working for 2 out of 3 bikes so far.

Zachmotox179 · 03-01-2008, 11:17 PM

anyone using the torco race fuel?

paunchy · 03-01-2008, 11:25 PM

Here we go again with another lame high-octane thread...

dood · 03-02-2008, 12:00 AM

Quote:

Originally Posted by crwclev

We're running Trak Tech 110...working for 2 out of 3 bikes so far.

Like I said...

mx571 · 03-02-2008, 11:24 AM

ok if my jetting is off then how come if i put race gas in the bike it comes alive. its faster throughout the whole rpm range with the race gas. its a big difference.by the way my pilot jet is 27.5 and my main is 112 and the needle is in the middle position and the air screw is about 1 turn out. just dont understand help me out guys!

keith42 · 03-02-2008, 12:31 PM

Octane is only part of the equation, the quality and consistancy of gas today is terrible. Your bike might be jetted correctly but for what formula of gas, 10% ethanol, winter blend, different blends for high population areas, different elevations with different evaporation rates, etc. Race gas is a consistant high quality gas that allows you to jet on the edge. Plus each gas company puts in their own additive package which is a different issue.

Really it shouldn't be looked at as race gas but as high quality gas. The bottom line is these motors only run better on race gas if the quality of gas your comparing it to is lacking.

dood · 03-02-2008, 12:58 PM

very true.
Most people idea of race gas is 110 octane stuff they buy down at the local gas station that sells the stuff out of their in ground containers.
You don't see any of the factory guys buying fuel that way.
True race fuels have additives and excellerants to make more power, like Propylene Oxide and other oxygen bearing chemicals.
Also the properties of race fuels can be different like specific gravity.
All this stuff will make a difference in the way your engine runs and or carburates.
Most race gases are lightly oxygenated or their fuels have a lighter gravity in which case you will need to richin up your mixture to compensate for this.
If your bike runs better on the "race fuel", it's probrobly jetted to rich in the first place.
I always tell people if that you run pump fuel. Make sure it's fresh stuff from a frequently visited gas station ( like one next to a freeway on ramp) vs out in the middle of podunk trying to save some $$.
Real race fuels that actually make power are going to be expensive and are high maintinence. The stuff I run is $32. a gal but it's worth every bit of that if you are building championship winning engines.

dood · 03-02-2008, 06:49 PM

Quote:

Originally Posted by ROBINSONDB22

what fuel do you run, nitro methane?

close, jk
The fuel that I run is gasoline based.

dood · 03-02-2008, 08:28 PM

Quote:

Originally Posted by ROBINSONDB22

i just can't believe there is a gasoline based fuel that is $32 a gallon and why aren't you saying what is is?

There are ton's of fuels out there that are stupidly expensive but they are expensive for a reason.
All the factory teams run their own version of fuels to get the most out of their engines
Try pricing out VP MR10 or R-tech PRO V-1.
Yoshimura's F&L fuel goes for over $200 a gallon.

keith42 · 03-02-2008, 08:48 PM

For years F-1 cars ran their own blends of fuel with heavy metals and all kinds of strange stuff. That was in the days of 1300-1500hp turbcharged 4 cylinder motors with powerbands of 1500rpm. I remember Ron Dennis (F1 team manager) saying it cost over $700 dollars a gallon to blend that stuff.

MiniMoto004 · 03-02-2008, 09:01 PM

and we though pump prices were high

dood · 03-02-2008, 09:14 PM

Quote:

Originally Posted by MiniMoto004

and we though pump prices were high

haha true, but with a pitbike engine only being able to hold just over a gallon a gas, it aint so bad.
My gas bill for my roadracers just for a weekend race is $450. My tire bill is twice that much and that is just for 2 sprint races.

keith42 · 03-02-2008, 09:38 PM

dood what do you race?

dood · 03-02-2008, 09:44 PM

Quote:

Originally Posted by keith42

dood what do you race?

ZX6R this year and maybe a GSXR750 if I have time to build it.

MiniMoto004 · 03-02-2008, 09:46 PM

Quote:

Originally Posted by dood

haha true, but with a pitbike engine only being able to hold just over a gallon a gas, it aint so bad.
My gas bill for my roadracers just for a weekend race is $450. My tire bill is twice that much and that is just for 2 sprint races.

thats crazy.. i guess i got the wrong job.

keith42 · 03-02-2008, 09:48 PM

My brother Mike is the Michelin tire rep at the races for wa, id, ut he has the black 44ft trailer at the races.

03-01-2008, 08:53 PM	#1 (permalink)
mx571 1st Gear Member Join Date: Nov 2006 Location: montgomery,al Posts: 234	gas? what gas, i mean octane are you guys running in your pitsters? i have a 08 x4r and it definitely runs better on half pump gas and half race gas.

03-01-2008, 09:06 PM	#2 (permalink)
dood 3rd Gear Member Join Date: Sep 2006 Location: Washington Posts: 3,055	Re: gas? If your bike is running better with half race gas mix, your jetting is off. High octane doesn't make more power, it actually takes away hp because of it's slow burning characteristics. Run the lowest octane you can with out detonation. I know plenty of engines out there running 89 octane.

03-01-2008, 09:14 PM	#3 (permalink)
Travisfab 2nd Gear Member Join Date: Dec 2003 Location: San Diego Posts: 435	Re: gas? I run premium grade (91 octane) pump gas in my GPX.

03-01-2008, 10:46 PM	#5 (permalink)
crwclev 2nd Gear Member Join Date: Feb 2007 Location: Raymore, Missouri Posts: 450 My Mood:	Re: gas? We're running Trak Tech 110...working for 2 out of 3 bikes so far.

03-01-2008, 11:17 PM	#6 (permalink)
Zachmotox179 3rd Gear Member Join Date: Jan 2007 Location: NH 03051 Posts: 3,073	Re: gas? anyone using the torco race fuel?

03-01-2008, 11:25 PM	#7 (permalink)
paunchy 1st Gear Member Join Date: Aug 2007 Location: Oakland, CA Posts: 176	Re: gas? Here we go again with another lame high-octane thread...

03-02-2008, 11:24 AM	#9 (permalink)
mx571 1st Gear Member Join Date: Nov 2006 Location: montgomery,al Posts: 234	Re: gas? ok if my jetting is off then how come if i put race gas in the bike it comes alive. its faster throughout the whole rpm range with the race gas. its a big difference.by the way my pilot jet is 27.5 and my main is 112 and the needle is in the middle position and the air screw is about 1 turn out. just dont understand help me out guys!

03-02-2008, 12:31 PM	#10 (permalink)
keith42 2nd Gear Member Join Date: Nov 2007 Location: sumner, wa Posts: 461	Re: gas? Octane is only part of the equation, the quality and consistancy of gas today is terrible. Your bike might be jetted correctly but for what formula of gas, 10% ethanol, winter blend, different blends for high population areas, different elevations with different evaporation rates, etc. Race gas is a consistant high quality gas that allows you to jet on the edge. Plus each gas company puts in their own additive package which is a different issue. Really it shouldn't be looked at as race gas but as high quality gas. The bottom line is these motors only run better on race gas if the quality of gas your comparing it to is lacking.

03-02-2008, 12:58 PM	#11 (permalink)
dood 3rd Gear Member Join Date: Sep 2006 Location: Washington Posts: 3,055	Re: gas? very true. Most people idea of race gas is 110 octane stuff they buy down at the local gas station that sells the stuff out of their in ground containers. You don't see any of the factory guys buying fuel that way. True race fuels have additives and excellerants to make more power, like Propylene Oxide and other oxygen bearing chemicals. Also the properties of race fuels can be different like specific gravity. All this stuff will make a difference in the way your engine runs and or carburates. Most race gases are lightly oxygenated or their fuels have a lighter gravity in which case you will need to richin up your mixture to compensate for this. If your bike runs better on the "race fuel", it's probrobly jetted to rich in the first place. I always tell people if that you run pump fuel. Make sure it's fresh stuff from a frequently visited gas station ( like one next to a freeway on ramp) vs out in the middle of podunk trying to save some $$. Real race fuels that actually make power are going to be expensive and are high maintinence. The stuff I run is $32. a gal but it's worth every bit of that if you are building championship winning engines.

03-02-2008, 08:48 PM	#14 (permalink)
keith42 2nd Gear Member Join Date: Nov 2007 Location: sumner, wa Posts: 461	Re: gas? For years F-1 cars ran their own blends of fuel with heavy metals and all kinds of strange stuff. That was in the days of 1300-1500hp turbcharged 4 cylinder motors with powerbands of 1500rpm. I remember Ron Dennis (F1 team manager) saying it cost over $700 dollars a gallon to blend that stuff.

03-02-2008, 09:01 PM	#15 (permalink)
MiniMoto004 1st Gear Member Join Date: Jan 2008 Location: Michigan Posts: 144	Re: gas? and we though pump prices were high

03-02-2008, 09:38 PM	#17 (permalink)
keith42 2nd Gear Member Join Date: Nov 2007 Location: sumner, wa Posts: 461	Re: gas? dood what do you race?

03-02-2008, 09:48 PM	#20 (permalink)
keith42 2nd Gear Member Join Date: Nov 2007 Location: sumner, wa Posts: 461	Re: gas? My brother Mike is the Michelin tire rep at the races for wa, id, ut he has the black 44ft trailer at the races.

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