Hi

Has anyone try this in your car?

Everyone with a turbo engine get very good results from Vp racing fuel and I want to try it in the dyno and the track to see the difference.

I know that we can only use unleaded fuel but I dont know wich one is better for our engines and how many octane would safe to use without damaging the wideband and O2 sensor and the catalytic.

.

 

hey i just red your signature....are you seriously running only 14.6 quarter with all your mods??? 211WHP and 233WTQ?? isnt that a bit to slow for the weight that our cars have?

 

You are completly right that my time at the track because the nearest track that I have is a piece of Sh** and it doesnt have a good grip.
I am suppose to be around 13.5 -13.8

In that track my car wheels spin in 1st, 2nd and 3rd gear .

I have raced with a mustang s/c that runs 13.4 and I stayed next to each other also a GTi MKV that ran 14.5 @ 103 and I won by a couple of cars. Also some Sti's and M3 E46.

 

my point exactly, i just transitioned from E46 M3 ( school ) , but i have friends that still have these cars, so now with gutted air box, larger IC and octane booster, im giving them a run for their money up about 100 , then i just run out of air. Today i installed Stratmosphere exhaust, and hopefully right before spring ill have either GIAC software or somebody elses, and then ill definitely should spank some of my friends M3s, its funny how they look at me whenever they think they will pull away, and im right behind them LOL

 

Thats the best!!!!!

Also another problem I have is that I live in Puerto Rico and we got a hot weathe imagine that right know we are in "winter" with 85 degrees during the day and 75 at night.

 

What kills cats and o2 sensors is the Lead so as high octane you can find without lead would be best. I think the highest unleaded is 104 octane but don't quote me on that. The tune should change a bit the higher in octane you go...

 

I've ran 100oct. before

 

I run my MCS on VP Racing 103 (99 octane).. much smoother than our regular pump gas.. faster too (or so says my butt-dyno).

 

If your ECU is not "tuned" to take advantage of the higher octane you're just wasting money. Sure it might feel like it runs better, but that might just be subjective.

Your computer has a pre-built map in it to adjust timing, etc. over a set range. Running high octane race gas just takes the adjustments to the max in the map table, which is the same max as running premium fuel.

 

Here in Europe I always use Super Plus 98 octane.. in some petrolstations there is 100 octane available... didn't feel a difference at all..

 

I don't think you'll see much of a difference between 98 and 100 octane, but in my case I feel a big difference (more smooth running than speed) on VP Racing (99 octane) than pump gas (93 octane).

 

i can tell yah . the ethenol blended gas we get down here in florida sucks. its only a 10% blend and your milage will drop about 2mpg . also our govenor wants to run this blend year round . he should drink some. i put some 104 octane booster in my last tank and it helped a lil . i would love to have some of the good stuff you guys can get . it would seem to keep the engine cleaner and your tail pipes less sooty.

 

I totally agree with you.


To ENGINE 58

I would try to stay away from those octane booster because they usally get your sparks plugs dirty very quick.

 

ive got about 54000 miles on my lil road dog almost all highway miles from my comuting to miami. it will be used up in one trip to work and back. but i will take note , it would seem the ethenol gas would dirty up more than anything else will. any word on ethenol gas?

 

A gasoline's octane rating is simply a measure of its ability to resist knocking. Using a gasoline with a higher than necessary octane rating offers zero benefit at a higher cost to you, the industry, and the environment. An modern engine's anti knock sensor may reduce performance to prevent engine damage when using a low grade fuel. When the proper fuel (i.e. sufficient octane rating) is used the anti knock sensor does not reduce performance, thereby giving a perceived power boost, but additional octane rating will not prevent a knock that doesn't occur, nor will it add performance. Be informed.

http://www.api.org/aboutoilgas/gasol...ine-octane.cfm

American Petroleum Institute http://www.factsonfuel.org/gasoline/index.html#top

http://www.oregon.gov/ODA/MSD/docs/p...tane_guide.pdf

Many additional resources can be found for those interested.

 

I found in my experience with FSAE that you can actually lose performance using higher octane "racing" fuels depending on the way the fuel company boosts the octane. My team found that Sunoco was using about 13% ethanol in the gasoline to boost their octane rating. Ethanol has about half the energy per unit mass of gasoline (~27,000 kJ/kg vs. ~45,000 kJ/kg) so our 100 octane racing fuel only had about 95% the energy that regular gasoline would have had. After our competition we decided to verify and found that we got a 2.5hp boost running 93 octane right of the bat on our 100 octane fuel map.

Don't bother with a higher octane fuel than your combustion chamber is designed for. You will see no actual gains.

 

So whats the optimum octane level for our cars?

 

The R56 MCS is designed to run 91 octane, that would be the optimum octane. If you can't get 91, use the next highest octane you can.