[QUOTE=NFRs2000NYC,May 8 2005, 05:37 PM] 100 octane will disengage VTEC in a stock ECU s2000.

 

DOES ANYONE GOGGLE ??????

My though on this is just this: High octane fuel will cause not damage to your car, will not cause you car to not go over 6k. High octane fuel will cause less knock dentination, meaning less retarded timing, thats all OH! and a few bucks more at the pump.Stay with what your owners manual says.

For the one that was running 100 and not going past 6k was it unleaded or leaded race gas?


READ THIS LINK: http://www.ftc.gov/bcp/conline/pubs/autos/octane.htm

 

DUDE you need to Goggle

 

here is yet another link that I goggled

http://www.choice.com.au/viewarticleasonep...&tid=100008&p=1

 

and another

http://www.bajajusa.com/Who%20Needs%20High...tane%20Fuel.htm

 

You will not get detonation with 87 octane because the ECU will retard the timing so you do not get knock.

I guess you did not understand my post. The ideal octane is the one that will not introduce knock, causing the ECU to retard the timing. I would venture that this is not 91 octane, but more likely 93 or so.

What are your credentials, that you make your statements with such certaintude?

 

What you stated was a paradox.

In order for the ECU to retard the timing it must first detect knocking. So if you put in 87, you're going to get knocking, which will then be solved temporarily by the ECU by retarding ignition timing. This will also cause a loss in power.

However, you seem to want to go against what honda engineers said in the manual, which is a minimum of 91 octane. You want to say that it's 93 or so. Well, if you feel you know more than honda engineering, I guess I'd ask for your credentials as well?

On that note also, I've had 92 octane in my car plenty of times and never had a problem. When I had an untuned VAFC2 I even at one point had put in 91 octane from down in illinois, and never got any detonation at least according to the VAFC2 (which can tell you if you're getting any detonation or not). But regardless, if you feel you know more than honda engineering, please be my guest by showing proof of such a statement.

 

Credentials? I think he posted what he read in the manual. Good enough for me.

 

Hey Wisconsin,
His credentials are google...you know, the internet? That's why he's so smart. He read it on the internet.
Under certain circumstances, I presume that the right person at the right time could very well get the S2000 to knock with 91 octane fuel. Since some communities may not offer higher octane than 91, Honda could have decided to use that as their baseline. I am lucky enough to not have to go lower, and I can not afford to go higher. This thread is useful to me as providing information only. It's just too bad that people have to keep clarifying their posts (which I may have to do later ).

 

^ Yup.

And dont pay the "obsene" amount of money for the 100 octane unless you have a full day of autocross ahead of you