there was a thread about this a while ago but i couldn't find it.........
why is it exactly that racing gas in a stock engine will do nothing but possibly make u lose power?

 

bercerse the higher octane, all it does is resist detonation.

thats the only differance. its not filtered more or anything. thats why high compression motors need it. otherwise they would detonate and die.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkRiBLaH &raquo;</TD></TR><TR><TD CLASS="quote">bercerse the higher octane, all it does is resist detonation.

thats the only differance. its not filtered more or anything. thats why high compression motors need it. otherwise they would detonate and die.</TD></TR></TABLE>

so does that mean in a stock engine racing gas would take longer to detonate therefore by the time you've reached redline the gas hasent detonated enough for the pistons to make peak power?

 

bump if anyone knows

 

i dont know if this helps and i'm not trying to flame if thats what you think, but performance is gas isnt needed in stock motors and i dont think it would do anything. I think it is just for the detonation issue. I could be wrong though. I'm still learning to.

 

High octane gas is simply more resistant to combustion. High compresion motors have extremely high cylinder pressure high cylinder pressure places the motor in a volatile state with lower octane fuel. Becasue lower octane fuel does not resist combustion as well high cylinder pressure coupled with increased heat can combust the mixture earlier than desired in a given pistons travel. This what breaks stuff.

On a stock motor using very high octane fuel you will discover harder starts and potentially a loss of power becasue you do not have enough energy to completely combust the entire mixture.