1NZ port & polish

[ChinoCharles]

My concern is this.

I get my head ported next week and go to the dyno. We dyno the new head and everything is whacked out. I lost 5 HP throughout and the ECU is now running a 9.5 AFR. In other words, my main concern is that the stock ECU isn't even going to know where to start.

If this is the case, so be it... the P&P just has to wait until I have a piggyback.

If not, I'll do the P&P first.

What ends up happening is I am literally loading my car like a slingshot right now. With every mod I do, I'm getting power earlier, although I'm not necessarily getting more of it. The engine is running richer and richer. The power also comes on sooner.

Then I get a piggyback and it is the proverbial launch of the slingshot. All of the sudden AFR is where it ought to be, the HP curve doesn't flatten out at 5000 RPM anymore and my car literally nets 25 HP in one day... at least I hope.

If it does, it proves my theory that there is power in this engine and that kid on Scionlife spent all the right money on all the wrong shit. If not, I'll probably be the last person to mod a 1NZ.

[Dragonacc]

Originally Posted by ChinoCharles

My concern is this.

I get my head ported next week and go to the dyno. We dyno the new head and everything is whacked out. I lost 5 HP throughout and the ECU is now running a 9.5 AFR. In other words, my main concern is that the stock ECU isn't even going to know where to start.

If this is the case, so be it... the P&P just has to wait until I have a piggyback.

If not, I'll do the P&P first.

What ends up happening is I am literally loading my car like a slingshot right now. With every mod I do, I'm getting power earlier, although I'm not necessarily getting more of it. The engine is running richer and richer. The power also comes on sooner.

Then I get a piggyback and it is the proverbial launch of the slingshot. All of the sudden AFR is where it ought to be, the HP curve doesn't flatten out at 5000 RPM anymore and my car literally nets 25 HP in one day... at least I hope.

If it does, it proves my theory that there is power in this engine and that kid on Scionlife spent all the right money on all the wrong shit. If not, I'll probably be the last person to mod a 1NZ.

Normally I'd expect an engine to lean out as more airflow mods are added, if yours isn't it makes me think the ECU is "learning" and trying to keep inside some kind of stock parameters. If that's the case the P&P will probably be more of the same.