i was just wondering if anybody used race fuel before and what are the pros and cons?

Race fuel pros: If you are tuned for it, especially with forced induction, you can run more aggressive timing and not get deto
Cons: no gains for stock or nearly stock cars, expensive, limited availability

i would reccomend you using it only if your car is built or highly modded

will i know if u running high compression u use hi octane i was just wondering about the fuel i dont plan on using it no time soon thanks

btw as of gain i HERAD that u do get a small gain, i was on streetfire.net and watch a vid with a 370z with 93 octane vs race fuel not sure what octane and it made 14whp im not sure if its ture but thats on a dyno check it out and u judge it for yourself.

Dont forget about it melting O2 sensors and killing the inside of your cat(s)

i did not know that

it burns much hotter, so be careful.

My buddy ran some 100 through his SRT-4 un tuned and it was def more responsive and seemed to pull harder but it wasn't worth the $6.75 a gallon for it. The Sunoco by the skatepark I go to has 100 un leaded and 110 leaded(I think they still have this).

i did not know that

I think its only the leaded race gas that does it btw

Race fuel is not friendly to your emissions controls. It is toxic stuff, too. As well as expensive. Especially for the street. I had some guys run it when I was working motocross and, for the slight advantage it gave them, they would have been better off simply working on their riding technique.

do it burn slower? then ur avenger fuel?

do it burn slower? then ur avenger fuel?

What do you mean slower? It will burn at the same rate but burns much hotter and more thorough.

i think what he is implying is that since its got more "oct" what he see is that its more like "super concentrated" so you dont "need" as much gas cuz its higher rating

Dont forget about it melting O2 sensors and killing the inside of your cat(s)

Do tell everyone how that could possibly happen.
I would think the heat needed to melt an O2 sensor a couple of feet from the cylinder head would do number on the exhaust manifold or header as well. Not to mention the spark plugs.
Do you possibly mean fouling an O2 sensor with leaded fuel?
Most of the readily available race fuel today tends to be of the unleaded variety. Sunoco, for example, makes five blends of unleaded.

if its higher octane you are looking for then run e85 thats 100-105 depending on who made it .that is environment friendly but the car will throw a Cel with a lean code.since it is mostly alcohol it will burn cooler but it isn't good for motor.

^^^As you stated:
"since it is mostly alcohol it will burn cooler but it isn't good for motor"
I'm not sure why you even suggested running E85.

There are several things (hoses/fittings/etc) in the fuel system that would need to be changed.
It would also need to be tuned properly for it.

zetec101;
Just don't get so hung up on such a high compression ratio, and you won't have to worry about the octane. [;)]

k thanks for the info i just wanted to know about race fuel thanks guys.

DON'T YOU DARE RUN E85
E85 is 85% alcohol and 15% gas and to burn a proper amount for your car to run you have to run A 10.5 :1 air fuel ratio which is a terrible for your motor
with normal gas your car runs a 14.7:1 A.F.R. and 12:1 at wide open throttle or cold warm ups

Um, the higher the octane the slower the burn, thus allowing for more timing to be added, this in turn helps to COOL the cylinder. You get better throttle response w/ 87 vrs. 93. Since the fuel burns slower, it prevents predetonation due to compression being too high. the same is for race fuel, it burns even slower than 93. also, if its leaded, it will foul out ur o2 sensors. Higher compression gives you better throttle response, not the fuel. ur computer may be sensing that it can advance the timing, this may feel like better throttle response, but in reality, when properly tuned, you can get the same from 87, especially w/ a quicker burn rate.

so just because I'm the slow kid it seems...
Is is safe in terms of blowing something up or otherwise making the car not work in any form or fashion, to run say half a tank of 97-100 octane race fuel in an svtf, with the other half being regular old 93 octane?

Alls the higher octane does is gives a larger safety margin against detonation, especially at high rpm's and allows a bit more timing.
Anytime that I've raced lately I run the tank below 1/4 and add 2-3 gallons of 110 race fuel.
If you're not f/i or built, theres no need for it.
Most all race gas I've found in my area is leaded. so watch what your getting. Leaded fuel is not friendly to cats and o2 sensors and will destroy them after awhile.
Not to mention the expense of race fuel. I pay 7$ a gal. for 110. and 48$ for o2 sensors...

One other thing I see many here failing to realize, It's illegal to run race fuel off track. There's no highway tax on it (ever notice the pinkish color race fuel has?)

As far as e85, the car will have to be tuned for it.
There should be nothing in our systems it'll effect or harm. We'll see after mines done.

The track near me has 97 and 100 octane unleaded, I was only planing on using it on track days, just not without making sure its alright for my fofo.

Higher octane fuel does NOT run any hotter then 87-93 , it burns at a slower rate lowering the chance of deto/spk knock , the slower burn rate has little to nothing to do with the performance it seld but cal allow for more timing and if the engine can use the higher timing can make more tq/hp

It will effext the o2 over time but I run pure leaded fuel most of the time and still get about a year from an o2

Only down side to higher octane fuel is its cost but in my opinion if you going to the track it at some point will save you from hurting an engine so to me it is money well
spent

Tom

at uti, we built stock spec chevy 350's in t-buckets and dynoed them with various heads, cams, rockers, intakes, n20, ect. after we played with them my groups motor put 502whp down on 93. after that we put some jungle juice in it, i dont remember the numbers but it was substantialy higher than 502. but keep in mind that was a dyno motor with no emissions and is torn back down after 3 weeks.

awesome, thanks for the input sir.

On the street I run 93.... when I'm at the track/road course its pure race gas.

Pro's ... safer to run, more power potential

Cons... costs more

i have a ? about nitrous with race gas. wat would be the difference between having a nitrous tune and not running race gas, or running just race gas wit no tune..??
from reading a few threads like when people ask about 75 shot jets on a stock svt motor
i always see race gas pop up or nitrous tune...

for ex: on the lasted nitrous thread- nitrous on the svt.. tom had this quote
-- Only way to keep your engine safe it a tune or run 105 octane (over half tank) when doing nitrous

my ? is wat would b the diffecnce between the tune and or using race gas??

Tune
Safer all the time
adjust timing and a few other things for the engines safety with nitrous why still giving you everything else the tune offers
ability to add fuel if needed
user adjustability with the tune (xcal)

105 octane and NO tune
gives an added safety from spk knock why on nitrous , the more high octane the safer

Tom

now thats the answer in looking for..