Power Mist Race Fuel?

MightyDuc Racing · March 22, 2003, 06:07:25 PM

What do you guys know about this company? I sent a resume a while back (probably found them on the net) and they returned to me an acceptance with a discount sheet. It seems that they sell a wide variety of fuels and I'm not sure which one I would need. Anybody???

Steviebee · March 22, 2003, 08:13:11 PM

ask SuperDave .. he'll know

Super Dave · March 23, 2003, 04:03:02 AM

Yeah, there are tons of products! LOL!

How much compression are you running?

T111 is ALWAYS good. Accelerates nice. Clean cool burn.

What are you using now, too? That might give me some ideas. Tell me more...

MightyDuc Racing · March 23, 2003, 05:25:32 AM

Had 11:1 when it blew and was running pump gas. However, since it's getting new cylinders and pistons and a complete rebuild next week, I was thinking of going back to the original 12:1 and race fuel. I just don't want to have to spend a fortune on fuel now that I've had to spend a large part of my budget repairing this motor. They gave me level three pricing as a racer support program. Which one should I go with and can you sell it to me for less? Please let me know.

Thanks!

Super Dave · March 23, 2003, 06:28:59 PM

That's world wide race support pricing.

When Muzzy won the World Superbike championship with Russell...

When Lawson won the Daytona 200 on the Yamaha over Russe...

Same prices for them too...

Shipping cost is the tricky part. You just have to watch that, but Rick is set up for the best discounts with shippers for different parts of the country.

T111 would be really good. You could do T112. It's a bit more expensive. Rick might think that would be the way to go. I do really, really love T111.

I use some of the oxygenated stuff myself. TO137, TO72, TO99, M80, T113, RFG...I've tried everything for an edge, research etc.

To dial it in, it's good to know what you were using before. Do you know?

MightyDuc Racing · March 24, 2003, 04:41:43 AM

I think they were running the race gas sold at the track before, not sure which octane.

Super Dave · March 25, 2003, 04:05:56 AM

Well, what were YOU using?

Fuel is stupid; it goes in through jets. But if you make it lean, it will all go boom. And the specific gravity is relevent here to that.

What fuel do they sell at the track?

MightyDuc Racing · March 25, 2003, 04:26:53 AM

I was using 93 octane pump gas from Mobil.

Super Dave · March 25, 2003, 04:44:51 AM

Ok, so lets say the guy before was using something else like VP C11. It's specific gravity is .710 and has no oxygen in it.

You put in street gas, which has a specific gravity of .755 or so. It's heavier, so fewer hydrocarbons actually enter the engine with the same jet size. If we were talking about a Busch race car, the difference in jet sized for those two fuels could be four to five jet sizes.

Additionally, street gas has an oxygenate in it. So, it leans it out even more. And the oxygenate's correct burn ratio is lower (likes to be richer) And it's unleaded, so the combusion isn't as complete. Maybe that was the potential piston problem? Not sure...

MightyDuc Racing · March 25, 2003, 05:24:01 AM

I had also switched the main jet from a 175 to a 165 per BCM. I did that before racing at Homestead, however, and had no apparent problems until the end of the day at Moroso Saturday. Should I change it back?

tzracer · March 25, 2003, 08:18:15 AM

QuoteOk, so lets say the guy before was using something else like VP C11. It's specific gravity is .710 and has no oxygen in it.

You put in street gas, which has a specific gravity of .755 or so. It's heavier, so fewer hydrocarbons actually enter the engine with the same jet size. If we were talking about a Busch race car, the difference in jet sized for those two fuels could be four to five jet sizes.

Are you sure Dave?

If you use fuel of higher specific gravity, more mass of fuel will flow through the jet (jets are numbered by volume flow, fuel has about the same viscosity, so volume through the jet should be the same - higher SG means more mass, lower SG means less mass - chemical equations work by mass). This should cause the jetting to become richer, so one would have to lean the jetting when going to higher SG fuel. (not including any changes due to different oxygen content)

Super Dave · March 25, 2003, 04:06:08 PM

QuoteI had also switched the main jet from a 175 to a 165 per BCM. I did that before racing at Homestead, however, and had no apparent problems until the end of the day at Moroso Saturday. Should I change it back?

Let's start at the beginning.

What did the bike come with when you got it? You don't have much of an idea on what fuel they used other than "race gas" from the track? Who told you to make the change and why?

News:

Power Mist Race Fuel?

Steviebee