Would I benifit from it? will it hurt cats or 02's? I put some in on top of my prem a while back and it seems there was more power but it could be in my head

 

It will help if your car can use the extra timing that race fuel will support over pump gas. If your car is already able to run full timing with no detonation or knock, race gas will not help.

 

If it's not tuned for it,you won't get the full benifit and probably not worth the price.It may help some if your present tune is off.

 

I run about three gallons mixed in a tank of gas once in a while
and have never had any problems with O2s or cats.

 

As long as the gas is UNLEADED, you wont have to worry about messin' up the o2's or the cat....But, if it is leaded gas, your hosed...heh

 

They make 100 octane unlead,he didn't say which it was.

 

you will see no benefit in a stock or near stock car. even on your h/c car, you just dont need it....

 

Whats your set up??????; I've got milled lt4 heads w/impy head gaskets and run 93oct. w/no detnotation, race gas is just a waste (unless you really need it)

 

It's Phillips66 Race fuel... I haven't showed any knock since I installed my LT4 Km and the car shows pretty agressive timing @ WOT but it does feel stronger with the race fuel ??? Maybe it's all in my head I dunno......Next time to the track I'm going to make some passes with and without to see if there is a diff...


----> I talked to guy about race fuel and he said imagine octane being like powder in dynamite the more/higher oct the more powerfull the punch. I always thought the only benefit was for high compression motors to keep them from knocking........

 

Absolutely incorrect.... the guy does not have the slightest idea what he is talking about. Octane can NOT be correlated to energy content or to burn speed.

Octane relates to the chemical compounds that the fuel in the combustion chamber breaks down into, as it is subjected to the heat and pressure of the compression stroke. Certain compounds (end gasses) will cause a second flame front to develop remote from the spark plug induced flame front, and when these two flame fronts collide, there is a huge pressure wave, and followup vibration (detonation). High octane fuels have chemical compositions that resist the formation of compounds that auto-ignite. Nothing to do with energy content, "power", or "punch".

Where you can get into trouble with higher octane fuels is in the "specific gravity" of the fuel. If a lot of "light end" hydrocarbons are used to resist formation of auto-ignition end gasses, the mass (~pounds) of fuel delivered by a fixed volume device like an injector can re reduced, reducing the total energy content of the fuel actually delivered.

 

CAM2=100 octane and unleaded

 

Yeah maybe he was trying to sell me that drum of fuel . It appears you have some knowledge of the petrolum industry. I work for a pertrolum pipeline and I have never heard the average person use terms like specific gravity and light ends.. We pump every finished product except race fuel so I don't know much about it. Also the gravity I can understand because all of our premium has a lower (heavier) gravity then the regular gas. Do you know about what the API Gravity is on Race fuel?

 

I use VP Fuels products. They list the specific gravity of most of their fuels on their website. Most of their fuels are "synthetic".

I had the opportunity to tune my engine on an engine dyno.... 381ci, 10.8:1, fairly mild 230/242 solid roller. We tuned it for 93-octane pump gas, then tried 94-octane pump gas (Sunoco Ultra), and picked up a few HP with timing and A/F ratio. Then we tried VP Fuels C-10 100-octane ([R+M]/2) unleaded, and were unable to pick up any additional HP, no matter what we did with timing or A/F ratio. Then to baseline it for the nitrous tuning, we switched the N/A motor directly to VP Fuels C-16, 117.5-octane leaded racing fuel, and the engine picked up 6HP. This appeared to be attributable to the slight difference in "specific energy content"... a reference to BTU/unit volume rather then BTU/Lb. The C-16 is a fairly dense fuel. Of course you wouldn't want to spend $7 a gallon for 6HP .

An excellent reference on gasoline:

http://www.faqs.org/faqs/autos/gasoline-faq/part1/

I worked for 13 years with a major oil company, both in engineering/plant design, including product blending, and in distribution.