best fuel for stock gsxr600 motor?

[cdovego]

Sponsor says run c12 or a 50/50 blend of c12/pump gas.

Ecu is stock, motor stock, intake stock, exhaust is a slip on, no power commander.

My gut says pump gas based on my highly calibrated butt dyno through the years.

What do you think?

[GingahNinjah]

no power comander... stock motor etc pfft just run the 93 at the track pumps

[TheIglu]

Sponsor says

There you have your scientific reasoning.

Remember, finance is a science.

[cdovego]

That's the thing though, why?

[Jim]

cant mix fuels, so 50/50 of C12 isnt legal at NHMS.
C12 is designed for the old 2-stroke bikes. dont use it.

stock motor, use the 93 pump at NHMS.
thinned head gasket, with full exhaust and high flow air filter....run Sunoco GT 260

[cdovego]

4 stroke motard uses c12 - are we going down the rabbit hole with this topic?

[Kurlon]

To get any gain out of a higher octane fuel you need to do one or more of the following:

- Raise compression to take advantage of increased knock resistance
- Advance ignition timing to account for higher octane's typically slower burn rate
- Increase VE via porting/cam timing/etc or boost (turbo/supercharging) to raise combustion pressures
- Adjust fueling to match

To get any gain out of an oxygenated fuel, you need to adjust fueling to match otherwise you'll be running way lean and loose power.

You haven't done any of those, or anything to improve the bike's breathing overall significantly. Your bike will make the most power on the lowest octane pump gas it'll run on without knocking. If racing with LRRS that means pump 93 from the track. Anything else is pissing money and HP away.

[Jim]

4 stroke motard uses c12 - are we going down the rabbit hole with this topic?

C12 is a shitty fuel, but is one of the only leaded options allowed at LRRS.
your best bet is 93 pump, then GT 260 once you get some higher compression.

[Stromper]

Benzene

Toxic but more power

[cdovego]

To get any gain out of a higher octane fuel you need to do one or more of the following:

- Raise compression to take advantage of increased knock resistance
- Advance ignition timing to account for higher octane's typically slower burn rate
- Increase VE via porting/cam timing/etc or boost (turbo/supercharging) to raise combustion pressures
- Adjust fueling to match

To get any gain out of an oxygenated fuel, you need to adjust fueling to match otherwise you'll be running way lean and loose power.

You haven't done any of those, or anything to improve the bike's breathing overall significantly. Your bike will make the most power on the lowest octane pump gas it'll run on without knocking. If racing with LRRS that means pump 93 from the track. Anything else is pissing money and HP away.

I'm in complete agreeance and I guess was looking for some support to make sure I wasn't missing something.

Perfect explanation, thank you for taking the time to type it out.

[Jim]

tell your sponsor to pick up a rider than knows more about the 06-07 GSX-R 600

[cdovego]

tell your sponsor to pick up a rider than knows more about the 06-07 GSX-R 600

ha, make it worth their time and they will.

[The Snowman]

I'm in complete agreeance and I guess was looking for some support to make sure I wasn't missing something.

Perfect explanation, thank you for taking the time to type it out.

Agreeance? You've been hanging out with Smutty too long.

[Jim]

ha, make it worth their time and they will.

you mean my charming personality and handsome looks arent enough?


...wait, they sponsor smutty and he's ugly.

[OreoGaborio]

Agreeance? You've been hanging out with Smutty too long.

I concord.

[Pigman]

tell your sponsor to pick up a rider than knows more about the 06-07 GSX-R 600

You called????????????????????

[cdovego]

Agreeance? You've been hanging out with Smutty too long.

School me, I was originally an english major in college. Is agreement the word I was looking for? I'm pretty ocd about words.

- - - Updated - - -

you mean my charming personality and handsome looks arent enough?


...wait, they sponsor smutty and he's ugly.

We might need to get you an org. chart.

[The Snowman]

I concord.

[csmutty]

This thread sucks.

[Kurlon]

This thread sucks.

Doc hasn't been anywhere near it.

[CEO]

Kurlon is spot on. If the bike isn't tuned at all, it's likely set up from the factory to run optimally on 91 (not 93) in most cases. So if there are any race-legal 91 octane options, that's what you should run. If not then do the 93 at the track I guess.

[The Snowman]

It's probably also tuned out of the gate for gas that if corn-free. Unfortunately, NHMS's 93 pump has ethanol in it.

[cdovego]

It's probably also tuned out of the gate for gas that if corn-free. Unfortunately, NHMS's 93 pump has ethanol in it.

Great, more maintenance.

CSmutty - go back to work, the adults are talking.

[Jim]

NHMS has 4% ethanol, where most pumps down 106 will have up to 10%.

[Paul_E_D]

Diesel would be best for a gixxer...