pinging

[why?]

because the computer system has been adjusted for the 87 octane. But if you experience pinging on a regular basis I think you really need to find a better quality gas. I haven't ever experienced it and i only run 87.

If you want to try a higher octane, that is your choice, but you should keep track of everything while you do to see if you really gain anything for it. A Scanguage would be a great tool to help keep track of everything.

[sg11]

Originally Posted by why?

because the computer system has been adjusted for the 87 octane. But if you experience pinging on a regular basis I think you really need to find a better quality gas. I haven't ever experienced it and i only run 87.

If you want to try a higher octane, that is your choice, but you should keep track of everything while you do to see if you really gain anything for it. A Scanguage would be a great tool to help keep track of everything.

Hmmm. I wonder why Honda didn't adjust the computer on the Si for 87 octane?

[why?]

Originally Posted by sg11

Hmmm. I wonder why Honda didn't adjust the computer on the Si for 87 octane?

Because they want the Si to have more power. Compression Ratio is only one small puzzle piece to what goes into an engine. With today's modern technology engines can both be monitored much more closely, and controlled much more easily.

A real way to know how reliable these cars is to go into the forced induction section and find out how many of those peep's have lowered their compression ratio.

That was something that used to be an absolutely must do.

[sg11]

Originally Posted by why?

Because they want the Si to have more power. Compression Ratio is only one small puzzle piece to what goes into an engine. With today's modern technology engines can both be monitored much more closely, and controlled much more easily.

A real way to know how reliable these cars is to go into the forced induction section and find out how many of those peep's have lowered their compression ratio.

That was something that used to be an absolutely must do.

Hmmm. I thought it was because it HAD to run on premium due to the higher compression and that the more you compress the air and gas the more likely it is to pre- ignite thus requiring a fuel with a higher ignition point?

And as far as reliability and forced induction, did you mean to say they haven't lowered their compression ratio?