Highest Octane For Stock ECU??

Originally Posted by Driftomodachi

I'm sure Nissan considered all this when they put parameters on the ecu so that it could be a world car.

So can a z34 run "100 octane" or whatever it's called from the local 76 station pump here in So Cal and will it improve performance?

When I had my 240sx with an sr swap it ran ok on 91 but felt much livelier when I put in 100 but the vq is a different motor. Sorry for the noob question just trying to learn. It's funny google actually pulls up better results than the forum but I haven't found a thread that confirmed anything

Originally Posted by DEpointfive0

I doubt it. And you'd probably "gain" only if you reset your ECU too

Originally Posted by Jordo!

Basically, if it wasn't running full advance, it would be more likely to do so on higher octane fuel.

And I say "more likely" rather than definitely because other sensor data affects how much advance it runs (e.g., oil temp).

Of course, you could always fill it up with a full tank of >100 AKI, and with Uprev try and dial in more advance, then save it as a "track day/High Octane" tune...