How does it create an incomplete combustion cycle?
The sensors will compensate the AFR to 14.7

Most tuners only tune the WOT areas in your map anyways.
So while cruising or driving normally, you're on stock values.

 

I don't think this is 100% correct. I haven't found any evidence saying that octane is related to burn speed, as 87, 89 and 91 octane all have the same energy (assuming you're not mixing extra crap like ethanol in there). Octane purely relates to resistant against knock. Using a higher octane than needed is just pissing money away, it change the performance characteristics of the car.

 

most gas stations i see have little stickers on them that say they "may" contain up to 10% ethanol...and everyone should knows alcohols are a high octane, slow burning fuel...but regardless, it's the fact that it's burning slower that it's reducing the likelihood of knock occuring...

 

Do you have a source for that? Everything I've read so far suggests otherwise, namely that the fuels burn just as fast. It makes sense to me that it would burn slower but who knows. The problem with ethanol is it also reduces the energy content of the fuel.

 

http://www.stockcarracing.com/techar...l/viewall.html

This would suggest that octane rating has nothing to do with burn speed. It is purely an indication of resistance to knock. If you have no knock, the burn speed is the same. If you get knock though, this speeds up the burn because you get flame fronts from multiple sites.

 

i've just always heard that, and not from randoms, like mechanics, and guys that build engines for a living...and even the source you posted doesn't actually say for sure that it doesn't, but that there's no conclusive evidence that it does... they just go one to say that it for sure is more resistant to heat and pressure...i checked a few other sources, inluding this random google search and they say similar things, not that it for sure doesn't burn slower, but there's no solid evidence...they only say what they know for sure, which is quite common knowledge (temperature/pressure resistance)...but then the say stuff like, "burn rate is a function of several variables, and the two are completely independent, although there is generally a correlation between octane ratings and burn rates."
this is confusing, it's like saying "high octane fuel doesn't burn slower, but generally higher octane fuels tend to burn slower"...it's like nobody even knows for sure.

 

Regardless, for the OP's purposes, higher octane is a waste of money.

 

http://forum.ih8mud.com/80-series-te...cts-myths.html

 

oh for sure, non-turbo, stock compression and tune, high octane is like like burning money cause it feels better than burning newspaper...

 

I'd like to see someone log their stock Lancer on 87 octane and see if it doesnt knock...

 

i run 87 in my 03 ES...it's bone stock...i don't datalog anything because it's stock...but what open source software can i use to log knock sum? I have an openport 2.0 cable that i use for tuning my Ralliart...

 

I use mitsulogger with the tactrix 1.3U.

I've always wanted to log my car when it was stock, but the technology didnt exist back then

It'd be interesting to see

 

87 on a stock lancer