pinging

[Bluevitz-rs]

The more timing advance you have in the ignition the higher grade of fuel you need. The 1NZ has a very conservative timing advance compared to the Civic SI and that's mostly why it needs high octane fuel.

If you were to run a stand alone EM and bump the timing up on a stock motor, you'd gain a bunch of power but you'd also require high grade gas.

[sg11]

Originally Posted by Bluevitz-rs

The more timing advance you have in the ignition the higher grade of fuel you need. The 1NZ has a very conservative timing advance compared to the Civic SI and that's mostly why it needs high octane fuel.

If you were to run a stand alone EM and bump the timing up on a stock motor, you'd gain a bunch of power but you'd also require high grade gas.

Good info. Thank you.

[why?]

Originally Posted by sg11

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?

Originally Posted by Bluevitz-rs

The more timing advance you have in the ignition the higher grade of fuel you need. The 1NZ has a very conservative timing advance compared to the Civic SI and that's mostly why it needs high octane fuel.

If you were to run a stand alone EM and bump the timing up on a stock motor, you'd gain a bunch of power but you'd also require high grade gas.

yup, he said it better.

And yes, i am almost positive none of the boosted guys have lowered compression.

[Focus_Sh1ft]

^ Garm and Parmas are the only ones.

I actually only run 89 now with no issues. It's incredibly unlikely the noise is actually pre-detonation.

[sg11]

Originally Posted by Focus_Sh1ft

^ Garm and Parmas are the only ones.

I actually only run 89 now with no issues. It's incredibly unlikely the noise is actually pre-detonation.

Well I haven't heard any pinging sounds since switching to 93. Would there be anything else that would make a pinging like sound that would improve by switching to a higher octane fuel? I'm wondering if the ethanol is having an affect on the octane rating?

[why?]

Originally Posted by sg11

Well I haven't heard any pinging sounds since switching to 93. Would there be anything else that would make a pinging like sound that would improve by switching to a higher octane fuel? I'm wondering if the ethanol is having an affect on the octane rating?

ethanol does have an effect on the octane rating, it makes it higher.

[sg11]

Originally Posted by why?

ethanol does have an effect on the octane rating, it makes it higher.

But less energy output?