racing fuel?

i tried a ratio of 2:1 (2 parts 91 octane to one part 100 octane fuel... effective 94 octane) in my stradale. i think i could feel the difference, but it was not a BIG difference. when i'm in a good mood i'll treat myself to a little 100 octane just for fun the last time i bought the 100 octane gas it was $4.99 a gallon.

 

I have a couple of 55 gallon drums of 104 Octane racing fuels in my garage (delivery). The reason I need it is because my Supercharged BMW needs it in order for engine to avoid "pinging" at high RPM.

Anyhow, I have mix the 104 with regular gas and use on my 2 Ducati 996s & my 360. Bikes/Car did run a little leaner & a tiny bit faster or its my imagination.

 

76 union has numerous gas stations that offer 100 octane race fuel.
you can call 1-800-345-0076 and they will help you find a station near you.

the two 76 gas stations closest to me that sell 100 octane are:

76 station
intersection of arroyo parkway and Glenarm
pasadena, ca
626-441-3392

76 station
2390 huntington drive
san marino, ca
626-286-6030

 

Unless your engine has the need for an octane level that high
you are just throwing your money in the wind.
A 360 is designed to run on premium pump gas.

 

I mix it all the time but more like 30 to 70% mix. It is about $4.20/gallon locally in the Bay area. Here's a chart that helps you figure out what works for you. It goes to waste if you mix more than necessary. I have file that shows the mixing chart of 91-100 to get what ever octane in between. File if a bit too large to post. PM me and I will send it to you.

 

there's some tables at
/www.76.com/Products/76racing.asp

 

I go to that 76 station on Glenarm for the 100 octane unleaded - mix it about 5 gallons to 17 premium for the SL (Euro compression). I can tell the difference.

Cheers
Kevin

 

what does that mean? i used to be able to buy 92 octane, but now i can only get 91 octane. some people live in areas where they can buy 93 octane. why not juice up (2 to 1) our puny 91 octane here in LA with some 100 octane to end up with 94 octane? or do you recommend that those who live in areas that sell 93 octane actually dilute down with regular gas to reach 91 octane? my butt dyno thinks it can tell a modest difference in my stradale between 91 octane and 94 octane not a big difference, but a difference. things just seem a little more "crisp" with 94 octane

 

If your buttometer can tell a difference, then do what you need to do.
All I'm saying is that the higher the octane the harder it is to burn.
And if your car is running fine and not pinging on the grade you use now,
then why pay for a higher octane fuel designed to stop the detonation your not suffering.
But if your car runs bad, and pings on the grade of pump gas you use,
by all means up the octane to the appropriate level to prevent detonation.

 

That's the one. I mix it to about 94 Octane and can tell a difference.

 

You would not even hear or feel the pinging in a modern engine. As soon as knock is detected by the ECU the timing gets retarded to avoid the pinging or knock; hence, lower HP.

 

It is not that easy – the engine is designed to run on EU 95 octane, which is roughly US 92 octane, but this means that the engine runs into knock control especially if it is hot > 80F and full acceleration from low speed (air intake temperature max.)

using > US 94 octane avoids that the knock control engages (which because of the mechanism causes a delay in responsiveness) and adds 5HP at max RPM according to my dyno testing – I can feel the former and not the later; I also find that the engine sounds smoother during acceleration

I use US 100 octane for the track to make it easier for the engine but go with US 92 octane for normal driving - you can get racing gas at every good motor sports supplier

 

Makes absolutely no difference. At most you make one maybe two extra hp. On my 355 Challenge car I ran 93 up to 115 (leaded race gas). Made no noticeable difference in lap times nor on a dynometer.

The difference between 93 and 115 was 2 hp.

The only benefit of race gas in a street car with OBII.....is that is smells good !

Regards,

Jon P. Kofod
www.flatoutracing.net

 

Remember, leaded fuel will degrade O2 sensors (slowly) and cats (quickly).

 

Canyon Service & detail in Santa Monica on Channel Road sells hi-octane gas. They are not pumping at the moment but will probably start up again soon.
I also just had two family members car's detailed there, being a detail freak myself, they did an excellent job, clay and all.

 

Remember that the factory has alot of engineering that they can rely upon so that you get maximum benefit from "pump gas". The only real way to see if octane makes more power is to dyno the car with the only variable being the fuel. There is a huge science behind blending of fuels, I know this for a fact as I used to blend my own fuel for my race cars over 10 years ago and the things available today that can verify the different blends are much more precise that when I was doing it. Yes my blends did make a difference but required weeks of "bench testing" then real world testing on cars and trucks. Back then I did have the use of a wheel dyno and the latest emission equipment which was used to measure the emissions coming out the tailpipe. We did the standard EPA tests and then we used our own WOT load tests to simulate different conditions. The most important thing to realize in all of this is that your test conditions must be standardized. If you don't have a baseline all your tests are useless as you have no base to start with. It amazes me that Ferrari can still use high compression engines and pump gas but then I didn't have computerized FI to work with either. That is one thing I will say about computers, they can adjust things on the fly whereas years ago we had to do time trials and then hope that the setup you picked worked.

 

High octane producing more power is a myth. High octane actually produces less power, it is less volatile than low octane. Octane is an additive to cause the fuel to be detonate less readily in higher compression engines and avoid pinging. You should use the lowest octane possible that doesn't produce a ping.

 

We should be thankful that they don't also put an energy content rating on street fuels -- it would be just another set of numbers adding to the fog

 

No cats, no O2 censor on a 355 C !

Jon

 

It won't make any difference on a street car. In the summer, when it's hot, I do put leaded race gas in my Ducati street bike and it runs a little smoother and a little more powerful but I doesn't run any different with unleaded 100 octane so I think that it's the lubricating qualities of the lead. Now, I have tried a 100 unleaded in my Ferrari (OBDII) and it makes absolutely no difference. So I put 91 in there now.