nope, no lead....ive been in auzi land before. not quite NZ but im glad to be here cause i saw some OUTRAGOUS prices "across the pond"

 

why would hiher octane make th einjectors stay clean? We have shell Vpower (I never use it though) gas that actually cleans injectors as you drive, you guys have anything like that? And just because w ehave killer 7Liter corvette Z06s making 505bhp doesn't mean we blow all of our cars up on cheaper gas. 98 is just getting you to spend more and you really shouldn't need it till, heavy mods, or racing engines Otherwise all 400+ cars here would be in junkyards from detonation.


and our highest octane from pump gas isn't 91 it's 93, not too bad for the aplications we run.

 

leaded gas is better at preventing detonation IIRC.
edit and im not shure your gas is on the same scale.

 

Did JDM and USDM have different redlines? Perhaps due to having ~100 octance fuel in Japan and only ~90 in the US?

Cause my imported S5 hard redlines at 7,750, taco goes to 8.

 

Your Research Octane of 98 is about 84 or 95 (R+M)/2 octane in the states.
Although it's a little higher than the typical 91 - 92 -93 octane available at most pump stations, it's not a big deal for the extra 2 octane.

There are pumps that can fill 100 (R+M)/2 octane sometimes.


What does octane have to do with dirty injectors?
Lead was banned back in the 1980's.


-Ted

 

yeah here in TN we have 93 octane and some gas stations sell 100! havent tried that though. would that be a bad idea?

 

OOPS!
That's should be *94* or 95 (R+M)/2 octane! :P


-Ted

 

not if you have some mods and want to run higher boost

 

I forget where I read this at, but there was an article printed on the octane rating of fuel and the differences between different parts of the world. I know it was in there somewhere that a higher rating (something like 98 or 100) in Japan, was just as good as the 93 octane in the states. Something about a different formula for calculating ron and mon.


EDIT: Found this.

http://en.wikipedia.org/wiki/Octane_rating

Incase your too lazy... :-D

Borrowed from Wikipedia

"Measurement methods
The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel through a specific test engine with a variable compression ratio under controlled conditions, and comparing these results with those for mixtures of isooctane and n-heptane.

There is another type of octane rating, called Motor Octane Number (MON), which is a better measure of how the fuel behaves when under load. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON.

In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in the United States and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "normal" gasoline in the US and Canada, would be 91 in Europe.

The octane rating may also be a "trade name", with the actual figure being higher than the nominal rating.

It is possible for a fuel to have a RON greater than 100, because isooctane is not the most knock-resistant substance available. Racing fuels, straight ethanol, Avgas and liquified petroleum gas (LPG) typically have octane ratings of 110 or significantly higher. Typical "octane booster" additives include tetra-ethyl lead and toluene. Tetra-ethyl lead is easily decomposed to its component radicals, which react with the radicals from the fuel and oxygen that would start the combustion, thereby delaying ignition."

 

So that explains why the octane is so high in Europe. I guess that makes sense, though. As for us in Texas, we get 93 for premium at most places. I think the only 91 I've seen was at some 7-11's.

 

Oh yeah, i bet the original responder doesn't have any idea what the hell he's talking about. I asked the difference was not a thing mentioned about revving higher than stock. My question was answered b4 u even posted. But I forgot, since your the mighty Ted, the rest of us are noobs compared to you. You assume far too much, you can't read my mind cuz if you could you'd knwo how much of an *** I'd think you were for posting like this. You're the only 7 owner on here that immediately assumes the question is simple and everyone else is dumb. I just wanted to know the difference and all the other answers were logical except yours. So get the "logs" out your mouth and start making sense. I already have my answers so this thread can be closed for all I care. Thanks to those of you that answered well/ stood up for me.

 

Drop the trash talking.
If you got a problem with me, I'd be happy to take it in PM.
This doesn't do jack for your thread.


-Ted

 

And since you're a newbie who has no clue what the FAQ is...

It's all here...

https://www.rx7club.com/faq.php?faq=...nduct_faq_item


-Ted

 

or dont be an *******, hey thats too simple of a solution right? You help when you want, but i dont think its necessary for the thread slamming.

 

You have a problem reading?
What does your reply have anything to do contributing to this thread?
Send me a PM.


-Ted

 

So take it in a PM then...why even make the first response public...

IBTL...

 

wasn't this thread about redline

 

Are you talking about my first reponse?

If so...

The original poster happened to drop the original post / question and then disappear for a couple days(?).
This makes for a really disjointed discussion, and the thread got sidetracked.
If the original poster had just clarified what exactly what they were looking for, we wouldn't have this long, drawn-out discussion, and the thread would've have degraded to the point where people are calling each other names.

Since the clarification was made later, the original question has been answered over and over and over and over...you get the point.
A proper search would've easily uncovered the answer, and this would've all been avoided.
Like most newbies, people are lazy to do proper searches.
Hell, I think the answer to this question might be even in the FAQ stickies?

So, I wasn't assuming the original poster was asking such a basic question.
I assumed it was to somehow modify the car / engine / ECU to rev higher.
This is why I replied the way I did.

To be blasting me in here like that is just a blatant disregard of the rules, as I have pointed out in the FAQ.
You got a problem with me, send me a PM.
No matter how much you dislike what I typed or if you have a personal beef with me, there is no excuse for such a derogatory reply like that.
Got a problem with that?
Read the FAQ.


-Ted

 

new gas station opened around the corner from my house and they sell 100+ octane. I heard it was like 5 bux a gallon tho.hmm i wonder if that would be a good idea to use when u go for smog testing