jsonnen

Is it my mind or do I feel a noticeable difference in power with going from 91 to 96 octane? god my car loves the new stuff Guru 18 psi chip kit- test pipe-Tial 46mm-Evo diverter......= friggin fast I love these cars so much, they have to be the performance bargain of the century!

Long live the 951....

hosrom_951

Just a question, i know that there is a difference between Octane and Ron fuel right? I mean, here in Dubai, we do not have Octane rated fuel, we have RON. So 96 Octane makes how much RON?

Mikeaagesen

Well in my owners manual it listed ron as just 1 or 2 points higher then the recommended octane, so i think its just a different way of measureing the fuel grade?

theedge

I think 96RON is about 93 or 94 octane... If it is 94, I get that everytime I gas up Now this is assuming he didnt just get 96 octane race fuel or something from a track

eclou

I run 25-50% 104 octane at the race track, and there is a very noticeable difference in power. I assume it is because the computer can advance the timing more since less knocking is sensed.

jsonnen

Ya I got the 96 octane at the track.........it made a difference for sure!

hosrom_951

Well, we have two types of RON ratings here, 96 and 99. Both unleaded, the manual recommends a MINIMUM of 95RON, i just use 99RON. What does 99RON mean in octane?104?

jsonnen

I think 99 RON is 96 Octane...anyone?

Bri Bro

Octane rating is a rating of the ability of the fuel to prevent knock.
http://www.truckpulls.com/fuel_octane_faq.htm

For details look at this.
http://blizzard.rwic.und.edu/~nordli.../gasoline.html

hosrom_951

Hmm.........is there a formula to calculate from RON to Ocatane?

MildMax951

Ok here goes...

What the guys in the USA call octane is PON or pump octane number it is calculated as follows
PON = (RON + MON) / 2
where RON is research octane number and MON is motor octane number

The rest of the World tends to use just RON on it's own, generally speaking to get from RON to USA Octane no (or PON) just subtract 5, so 99 RON in Dubai is roughly equivelent to 94 Octane in the USA

HTH

hosrom_951

Then add 5 to get from Octane to RON

hosrom_951

So 104 octane would be 109 RON, DAMN! that WOULD give you an increase in power

DanR 1201

Go to http://www.btinternet.com/~madmole/R...RONMONPON.html for a comprehensive explanation of the distinctions.

toddk911

Octane does not give horespower, it meerly allows the engine to run more advance, compression, boost, etc. without knock.

If you feel or make more power with higher octane (assuming you do not turn up the boost or advance timing) there is something wrong and the computer has been pulling back timing.

IRRC, the computer doesn't advane timing on it's own due to having a higher octane fuel. You CAN advance the timing with the higher octane, but I do not think the computer will do this automatically.

Anyone else know for sure???