Hey guys, I've been doing a lot of thinking...

One thing, is that I want to keep my car N/A, at least for as long as possible, and I want to make it as fast N/A as possible as well.

But besides all that, I have been thinking about tuning the car with the EMS. I know that people say the car has room for improvement in the a/f area, but I'm wondering about something more important, and a bigger power adder, called timing. Is the timing already maximized for performance? Or could we advance it a little more? The EMS will log knock right? Assuming the S has a knock sensor.

Sorry if I don't sound to smart, I come from a 99 Eclipse and had a standalone in it...I know what a difference adding timing made for it, and it was more than the difference of getting the correct a/f ratio, however...tunning a turbo car on 91oct pump gas is much different than on an N/A car. I know that too much timing and boost would create knock, which was also logged...and I tuned the car for 0 to very very little knock.

Can we do this with the S? Have people tried before? Once it starts to knock, we could always add some 110 octane gas in there to keep it safe again. I'm just interested in seeing how much power I can make N/A, and how fast we can make the S go N/A.

Thanx guys, I'm not only interested in straightline speed, even though thats what I'm talking about here

 

Basic tuning principles apply for any car you tune. If you are tuning on a dyno like a dynapack, it'd be easy for you to keep increasing timing (assuming A/F ratio is correct) till you see no increase in torque.

 

Timing and AFR ratio have nothing to do with each other....You will have to monitor your knock sensor output to ensure that it does not pick up any knock noise when you advance timing.... The basic method of timing tuning is as follows (easier said than done).
1. Fill car up with high octane gas....
2. Advance timing as much as possible till the knock sensor picks up knock.... This step is done to distinguish between engine noise and knock... This is critical because every engine produces different noises. it is impossible to know what is noise and what is a knock if this step is not taken. The crude method that many tuner use is a voltage cutoff level, this level is basically determined using experience and knowledge of the engine they are tuning. Once again, this method is not the correct way but it will get the tuning pretty close to what is desired if you have n experienced tuner.
3. Put the car on a dyno and adjust timing such that HP is up and knock is 0.

 

it really depends on the tuning camp you belong too. A lot of people think that knock sensors are useless once you start changing the dynamics of the car. Monitoring your A/F ratio properly and playing with timing while increasing torque is the proper way to tune a vehicle.

 

Ok...damn, I was tired when I wrote my first post

Basically I guess my initial question was, is there much power to be had in the S2k by increasing timing (I've seen that just a VAFC with only fuel tuning has yeilded as much as 7-8hp throughout the powerband).

And this is just for increasing timing on pump gas. Has anybody tried this? Can we get say 5 more degrees on pump gas...because 5 degrees should be a "substantial" difference