just wondering what kind of gas are you guys filling up with? what's recommended? track? street?

 

whatever the manual says to use, unless you've done compression or timing mods.

Do a search, the octane debate has popped up numerous times on every forum on honda-tech and just about everywhere else on the internet.

Please read: OCTANE DOES NOT= POWER.

 

Whatever is closest to the manufactures specs. I know for my dad's bike I was very surprised because all this time we were running nothing but premium which is rated at 92 and the manual says 87. So next time I filled up on plus which is 89 the bike definitely rode much smoother and the fuel was there longer.

P.S. I'd never put regular into anything I drive or ride. Just a preference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D4RE &raquo;</TD></TR><TR><TD CLASS="quote">

P.S. I'd never put regular into anything I drive or ride. Just a preference.</TD></TR></TABLE>

which is fine, if you dislike money, but it's not necessary to run any octane higher than what is necessary.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rdblckSV650S &raquo;</TD></TR><TR><TD CLASS="quote">

which is fine, if you dislike money, but it's not necessary to run any octane higher than what is necessary.</TD></TR></TABLE>

x2 but 91 in my bike and car cause thats whats recommended even my xr50 recommends 91

 

13:1 compression = 93 octane for me.

 

As high as I can find

 

Bike will run on 87

But I use 89 just to be on the safe side.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fatboy01 &raquo;</TD></TR><TR><TD CLASS="quote">13:1 compression = 93 octane for me.</TD></TR></TABLE>

my f4i had 12 somthing:1 compression and ran like a champ on 87.
Compression is only part of the equation. What does your manual recommend you run?

 

Anyone know offhand what a 99-02 R6 is supposed to run?

 

Whatever the manual says.

 

Running 87 on my 999 w/ 11.4:1 compression.

http://www.ducati.ms/forums/showthread.php?t=18855

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rdblckSV650S &raquo;</TD></TR><TR><TD CLASS="quote">

my f4i had 12 somthing:1 compression and ran like a champ on 87.
Compression is only part of the equation. What does your manual recommend you run?</TD></TR></TABLE>

Well it was 87, until the 637cc kit went in, upping compression to 13:1. Wiseco said to use 91+ octane with the new pistons. I've never tried 87, so I'm not sure if I'm wasting 50cents every time I fill up or not.

 

06 1000RR - Premium octane only (93 here)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fatboy01 &raquo;</TD></TR><TR><TD CLASS="quote">

Well it was 87, until the 637cc kit went in, upping compression to 13:1. Wiseco said to use 91+ octane with the new pistons. I've never tried 87, so I'm not sure if I'm wasting 50cents every time I fill up or not.</TD></TR></TABLE>

nice job on the motor. If wiseco says 91+ then i'd probably believe them too. Just wasn't sure if your 13:1 was from the factory or not.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rdblckSV650S &raquo;</TD></TR><TR><TD CLASS="quote">

my f4i had 12 somthing:1 compression and ran like a champ on 87.
Compression is only part of the equation. What does your manual recommend you run?</TD></TR></TABLE>

+1

its more then just compression ratio. size of the cylinder, what the valves are made of, the shape of the combustion chamber. I would just go with what the manufacturer says.

The lowest octane we have here is 95 next step up is 98 (we dont have a plus) but if you look around, you can find this stuff called "4 star" which is Leaded 98

too bad i dont have a 400hp something to take advantage of it...

 

I fill up with 94 octane and then put the Autozone Octane Booster in at every fill up




Or I just do what that manual says and put in 87

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 85 &raquo;</TD></TR><TR><TD CLASS="quote">

+1

its more then just compression ratio. size of the cylinder, what the valves are made of, the shape of the combustion chamber. I would just go with what the manufacturer says.

The lowest octane we have here is 95 next step up is 98 (we dont have a plus) but if you look around, you can find this stuff called "4 star" which is Leaded 98

too bad i dont have a 400hp something to take advantage of it... </TD></TR></TABLE>

i believe the europeans use RON rather than octane. They're pretty close to the octane equivalents we have here, they just use a different system for measuring.
So, 95 octane there isn't the same as 95 octane here.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rdblckSV650S &raquo;</TD></TR><TR><TD CLASS="quote">

i believe the europeans use RON rather than octane. They're pretty close to the octane equivalents we have here, they just use a different system for measuring.
So, 95 octane there isn't the same as 95 octane here.</TD></TR></TABLE>

Troof:

Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Because of the 8 to 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the US and Canada, would be 91-92 in Europe.

 

95 octane here, similar to your 91. Just because our 91 octane sucks and is know to damage the fuel system, 95 octane also costs $0.04 per gallon, so it doesnt matter much...

 

i use 87 in my Duc and it's recommended to use premium.

i also use 87 in my TL and it's recommended to use premium.

using too high of octace, even if recommended by the manufacturer will leave excessive carbon deposits in your motor which will eventually raise your compression.

running the lowest octane before detonation will increase performance in any vehicle. every engine builder and tuner knows that to get the most perfornance out of a motor is to tune lean next to detonation.


the only benefit of running higher octane is being able to run more agressive timing on whatever vehicle you put it in. if your bike runs perfectly on 87, you will see absolutely "NO" performance gains by using premium fuels "UNLESS" you remap the bike. You can even see a loss of performance because the vehicle will run rich, which will cause you to lose throttle response.

Of course after remapping a bike to use a specific fuel, you can no longer go back to 87 unless you have it remapped again or remove whatever aftermarket engine management system you have in your vehicle.

Losing 1-5hp difference in very hard to feel on your homemade @ssjet-dyno.

Engine tuning forums actually laugh when people say they can feel a performance gain on stock tuned cars/bikes when switching from 87 to premium fuels when most of the time it has the opposite effect.

There are also a lot of people that say they get bad performance for lower octane fuels but have found that the problem is where they buy fuel (Arco/Thrifty/etc.). They found that by switching to a better supplier (Chevron, Texaco, Shell) has remedied "most" of the bad performance from using low octane fuel.

There was an independed study done by a magazine (Turbo, Sport Compact, Import Tuner... I forget) 5-7 years ago, and they went and bought gas from 3 differenct Arco's, Chevron's, Shell, Texaco, and a small independent gas station. They found that Chevron gas runs the closest if not higher than its posted octane rating.

footnotes: Use 87 octane if you can in your motor. If you can't use 87 then try 89. If you can't use 89 then use premium. Don't use octane booster unless you "HAVE" to.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rdblckSV650S &raquo;</TD></TR><TR><TD CLASS="quote">

nice job on the motor. If wiseco says 91+ then i'd probably believe them too. Just wasn't sure if your 13:1 was from the factory or not. </TD></TR></TABLE>

Thanks mang, except I added some exhaust and a K&N recently without swappin the jets.... so I'm running lean which is probably not helping in the power department. Broke as hell so I'm waiting on a deal for a factory jet kit.

Anyones have a kit for a '98 f3

 

run the lowest octane you can without knocking

 

I only run my bike on the tears of baby orphan whales. Seems to work great.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EngineNoO9 &raquo;</TD></TR><TR><TD CLASS="quote">I only run my bike on the tears of baby orphan whales. Seems to work great.</TD></TR></TABLE>

HAHA. Holy crap, that just mdae my miserable day. If i had any room in my signature i'd put that in there.