Anyone use it ?
Never used it. I've always heard it's not good in a 2-stroke.
If you need it, it's a sign of another problem. Buy better gas or adjust timing.
never.
Your better off buying av gas.
not to spark the fuel debate, but for the nth time, pump fuel is fine. I just did a very spirited lunch ride on my TZR, and its just running 93 pump fuel, with a fresh motor and 145 psi compression readings between 7-9500 most of the 30 min ride.
:olaf: :gentleman:
I had a 320whp Saab viggen, ran torco for a bit, turned plugs orange, but it did help some when I lived in cali with crap ass 91 oct. Moved to Chicago where there is 93, prob solved when running 21 psi of boost.
If you read the VP container it says to use only enough to raise the octane 1.5-2 points otherwise it can leave a coating on engine parts and do damage.
Ran it it in my yz dirt bikes years ago, just wondering ...
Orange is from MTBE. Used for a while until new catalyst rules forbade it.(durability/poisoning) and ground water contamination
My old favorite was made in Flint,Mich. called Dura-Alt it was the second best octane booster at the time.
ANALINE.
cliff
what is octane? is it an additive the oil company adds to the fuel or is it already part of the fuel? if it is already part of the fuel i can't see how an additive can raise the octane level. i do know that at the gas station they actually only have high test and regular. if you want mid grade they blend the 2 together to get 89 or 91. correct me if i am wrong because i am a lot. :huh:
different octane ratings can be achieved by additives and usually just composition of the fuel.
octane the stability of fuel under pressure situations. the lower the octane rating, the less stable it is to combust under pressure. this is why high compression motors need higher octane fuel typically, to keep them from pre ignition under the increased pressures or a combustions chambers heat before the spark event. (pinging)
fwiw, the usa and europe use 2 different methods for measuring octane.
toluene and xylene were once common octane boosters, but they will def 'wash' lubricants from parts and are hazardous, bad, to humans.
:twocents:
great info. learn more everyday.
thanks,
Also, octane is a simple hydrocarbon of 8 atoms of carbon and 18 of hydrogen. This little bit of trivia made Organic Chemistry far more interesting for me, as did a young lady named Liz. Like some of our bike parts, Liz was made of unobtanium. Alas.
See that orange coloration on the exhaust turbine? That's from MTBE.
way over my head. the easy way for me is just hit the 93 button. :umm:
We don't even have a 93 button here. :rolleyes: Our crappy swill tops out at 91 (R+M/2). And it still costs $5/gal right now
yeah, cali, fla and texas are 'locale non grata' for me to live. ya'll can keep all that. :dawg:
I can understand Cali, but FL & TX?
ive been to fla enough to not want to be there, and texas is just weird
Quote from: m in sc on May 06, 2023, 07:44:10 AM
ive been to fla enough to not want to be there, and texas is just weird
I lived in Florida for 5-1/2 years. It was about 5-1/2 years too long.
I also just run straight pump gas in my TZ. I just buy the highest octane that is available wherever I happen to be. FWIW, with new rings my motor has 160 psi readings and the head still has the original design combustion chambers. I would not use octane booster either.
What it comes down to is whether there are signs of detonation. If not, pump gas is sufficient. I ran the phat trakka at 165-170psi on 91/93 octane with no problems. In a TZ or TD race motor that gets heat soaked at full power, 100 octane was more than enough to keep it safe.
You can mix two lots of gas with different octane ratings to get something between but it's not a straight average. Octane rating is simply a measure of resistance to detonation. Higher octane does not equate to more power until the motor is at the limit of detonation. On a street motor that's rare unless timing or jetting are way off. And if they are, fix it...
Quote from: teazer on May 07, 2023, 12:58:06 PM
What it comes down to is whether there are signs of detonation. If not, pump gas is sufficient. I ran the phat trakka at 165-170psi on 91/93 octane with no problems. In a TZ or TD race motor that gets heat soaked at full power, 100 octane was more than enough to keep it safe.
You can mix two lots of gas with different octane ratings to get something between but it's not a straight average. Octane rating is simply a measure of resistance to detonation. Higher octane does not equate to more power until the motor is at the limit of detonation. On a street motor that's rare unless timing or jetting are way off. And if they are, fix it...
exactly. ^ best explanation yet.
The only thing I ever used was toluene 10%. The commercial stuff is useless. Toluene is the most common major additive in most racing fuel. You can smell it. F1 spec fuel has been as high as 84% toluene which by itself has a MON of 121 octane.
I have no idea how a 2-stroke reacts to it. My cars always ran fine and stopped audibly pinging. I think I would want EGT sensors in place to experiment.
There is quite a bit of data online about the use of toluene as an additive in gasoline. Most of it is positive. It's not $3.99 a gallon anymore and not on the shelf at ACE hardware and Home Depot like it used to be.
This article is interesting:
https://nyet.org/cars/info/toluene.html
The author of the article made an error in calculation where he projects the expected octane numbers. According to an SAE whitepaper, the effect of toluene addition is not linear by %. The author assumed that it was.
IR8D8R