I've been trying to do a lot of research on Race fuel, but still haven't found my answers. I don't want opinions but facts. Im currently on a Fully Build B16A Dart sleeves, 82mm stoke stroke, pistons/rods/built head etc. Made 440hp on 93 octane. I was curious as to what kind of gains i would get if i ran some Q16/vp fuel for a retune.

When i was researching all i can gather from higher octane fuel, is that it helps the chance of detonation/pinging. But How exactly does it help it make more power or will it? Does it burn faster/cleaner? etc..

What about if i went to E85? I know E85 raises the duty cycle on the injectors but what makes E85 on a tune, make more power?..

Thanks in advance..

 

Being able to tun more timing. E 85 resists ping a lot better than 93 gas. More timing=more power

 

Simple. the fuel's energy can resist knock. more knock resistance means more timing can be used in the ignition of the fuel. More ignition means more ability to increase boost which equals more power

 

I agree the ethanol is the safe way to go... q16 will yield 6% more power over c16 though I have tested it.

 

e85 is the way to go man, but you will need a pump gas tune as well we have been seeing some wierd rubber build up in the injectors and the only thing we have seen work to get it out was just to run pump gas through the injectors and it disipates

other than that we have loved it well along with the price of the stuff

 

What about if i went to E85? I know E85 raises the duty cycle on the injectors but what makes E85 on a tune, make more power?..

Thanks in advance..[/QUOTE]

E85 burns cooler and has a higher octane rating (105) you need more fuel than 91 to reach the same power. The duty cycle raises because you need more fuel to create the sa.me power. About 30%

 

Again, because of the alcohol (ethanol) content, it raises the ability to resist knock...etc

 

look at my numbers in my signature. i ran into some boost control issues on the dyno and wasnt able to raise the boost on the racegas like i wanted to.

the pump gas is 93 sunoco
the race gas was only vp c12, im certain c16/q16 will get even better gains.

with the c12 i was able to run 5-6 degrees more ignition timing and about .5 afr point leaner as determined from how my engine was making power/how the plugs looked.

the benefits of higher octane and how it allows for more power has already been stated

 

Thanks for the replies guys! I'm glad to hear actual experience and testing, not some " i heard this or that bullshit."

I've been reading somethings about e85 can be corrosive or corrode overtime...So Q16 seems to make better power over C16?

 

Before you make your final decision look at prices.....e85<$4/gal.....isn't c16 like over 20/gal

 

Im also making the switch to E85 this is some great Info thanks you guys

 

e85 for 3 years now, and never seen any carosiveness

there is some rubber build up in the injectors after time, but as stated before run pump gas in it from time to time and it will dissapear

 

oh and e85 is $2.45 here

 

hmm...i guess im worried about how much power i will make with e85 if its even that much more? but maybe I'm underestimating?

 

pump e85 has been known to make 800+ man

if you are worried about consistancy then they sell 5 dollar test tubes lol

i have never seen or had an issue with it yet though

 

E85 > Race fuel It's cheeeap compared to race fuel. (At least in TN it's $2.60/gal)


I guess this really depends on availability... I have 3 stations within 15 miles of my home.

 

lol i wanna try and make 500hp ill probably be behind that goal. but i guess its worth a shot ha

 

500 is pretty easy to do man i did it on a stock long block gsr, and a .66mm turbo in fact it was 590ish@28psi

 

E85 will eat up the rubber in the fuel system, that is most likely what you are seeing.

 

actually no everything is still dam near mint we have seen this on 3 differant cars, and cant figure it out yet. but if i have to replace a 60 dollar peice of hose thats to ez lol.

and where is the research you read that says it eats rubber so i can go read it????

 

gotta love that huh? Im sure you have to fuel up alot more but its nice having 105 octane gas at pump gas prices

 

i dont daily drive my chit anymore man i think it is to hard on the build, and leads to failure so the track is it for now

 

What do you mean its hard on the build? are you talking about the amount of boost your running or the E85?

 

i think that driving a fully built car on the street is hard on it, and will help in it eventually failing.

e85 to me is the best thing to happen to fuel in a long time

 

ohhhh thats what I thought you were saying haha I drive mine every chance I get!

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