Improved performance and hp from 2 degree timing advance?

[sudden urge]

I just find it hard to understand why Nissan wouldn't have advanced the timing 2 degrees if it improves response and hp, especially if you can still run 87 octane. What possibly could be their reasoning for that?

[P's Titan]

Originally Posted by sudden urge

I just find it hard to understand why Nissan wouldn't have advanced the timing 2 degrees if it improves response and hp, especially if you can still run 87 octane. What possibly could be their reasoning for that?

I thought you had to use 91 for that ? Someone had told me that or I read it on here

[sudden urge]

Many people at the other forum, starts with a C, have stated this many times. I just wanted to get opinions from here.

[P's Titan]

Originally Posted by sudden urge

Many people at the other forum, starts with a C, have stated this many times. I just wanted to get opinions from here.

about the 87 or 91 ? I think a mechanic at the dealer told me about the 2% timing thing but premium is a must. Good luck and I am sure this will be a big topic.

[m95roadster]

If you advance your timing and not use premium then you're wasting your time. The knock sensor will pull back timing when it senses pinging. By using 91 octane it reduces the chances of detonation, thus making use of the increased advance.

[RB's Titan]

I run 87 most of the time with +2 adjustment from the Cipher software and have never had a pinging issue. As a matter of fact the ONLY time I had a ping was when I had the Unichip on aggresive and the engine was and cold outside and I floored it and I heard 8-10pings and then gone after immediate deaccel. Granted please note that I'm at sea level.

I've been wanting to hear the ping again just to see if it will do it and to see how quick I'll notice it. My dad's 01 suburban with 48K pings and my father in laws 22K 03 ranger pings easily. So I feel prety confident that we got a non pinger.

Are many of you getting pings?

[m95roadster]

Originally Posted by RB's Titan

I run 87 most of the time with +2 adjustment from the Cipher software and have never had a pinging issue. As a matter of fact the ONLY time I had a ping was when I had the Unichip on aggresive and the engine was and cold outside and I floored it and I heard 8-10pings and then gone after immediate deaccel. Granted please note that I'm at sea level.

I've been wanting to hear the ping again just to see if it will do it and to see how quick I'll notice it. My dad's 01 suburban with 48K pings and my father in laws 22K 03 ranger pings easily. So I feel prety confident that we got a non pinger.

Are many of you getting pings?

RB, the Titan has a knock sensing ignition. You shouldn't be able to hear the ping.

[Hazertmed]

Many people have had the timing advance including myself and use just 87. I Have not noticed any changes in engine performance negative wise. Most have noticed that the timing is not retarding back during regular driving (those who have software to tell).

[sudden urge]

I found two paragraphs from others after reading up on this; I have to agree with their statements.

Regardless of where you set your initial timing, your ECU is going to continually adjust you engine timing in response to engine demand and performance. Initial timing shouldn't make any noticeable difference, UNLESS the initial timing was way off to begin with, say 10 degrees rather than 15. Your initial timing just keeps the motor from pinging at idle, especially in cold climates, and from dieseling when you shut it off. Once you step on the gas, the ECU takes over and controls timing based on engine demand and performance.

There is a difference between the initial timing and the timing curve. Initial timing basically only effects start up, idle, and shut down. The ECU has a programed timing curve that advances ignition timing to predetermined points based upon engine demand. (RPM, throttle position, emissions, etc). It would be the programing of these predetermined points on the timing curve that make the difference in the more powerful QX56, motor. That motor probably is programed to run on higher octane fuel, also. Thus, the difference in power.

[pi3yeargrad]

Doesnt our computer already change and make up for us who use the 91 octane fuel? If not is there a way to chage our system like the QX56 since we use the "better" gas anyway??

[sudden urge]

The ECU has a programed timing curve that advances ignition timing to predetermined points based upon engine demand. I understand that to mean is our ECU is preprogramed and that software is different than the Armada's and QX56's because of the base octane recommended.

[m95roadster]

Originally Posted by Hazertmed

Most have noticed that the timing is not retarding back during regular driving (those who have software to tell).

Under normal driving the timing will more than likely not need to be pulled back. It's when the motor is under load.

[Titan1219]

one things for sure, its not worth the hassle. if you could do it yourself, sure, experiment, but having to have it done at the dealer....forget it. its not a huge difference (if any) and not worth paying to have done

[smschulz]

I also agree with RB .. I have been running 87 and haven't had any PING issues with the 2 degree advance.

[SoBeGraphics]

I had mine done and dynoed. It showed a 5hp increase but honestly you cannot tell any difference while driving.