I am trying to build a better ignition timing map for the FCON. I want to start somewhere in the factory range and go from there.

My OBDII scan tool at the shop updates to slow to get any good results.

I am curious if anyone could tell me where a 350z idles and where it is at full throttle. If you have a E-Manage in there dropping MAF signal voltage with your test results let me know so I can factor in the effect that has on ignition timing.

Thanks,
Charles

 

I have several runs from stock and mild N/A cars from 750-6600 RPM, using the consult II. Let me know if you want them, wont be till monday if you do. If you want anything more specific, let me know.

 

Vandyz: You have exactly what I am looking for... it would be much greatly appreciated if you would share that information with me!!!

-Charles

 

I dont have them logged phunk....becuase the logging software on my OBD II Lap Scanner thingy is terrible.

But in viewing the timing, I can tell that the base timing at WOT as redline approaches is roughly 20-24 degrees of advance....this is with my TT at 6psi. When I run 9psi, the base timing was more like 20-22 degress. The target for our application is around 14-16 degrees of total timing advance. So I can been subtracting about 6 degrees of advance at WOT with the emanage.

 

GQ - base timing is timing at idle, not at anywhere else in the rev range. 14-16 degrees is miniscule timing at WOT...causes unnecessarily high EGT's, which leads to broken rings

Phunk - it's a pretty typical NA curve from what my last log showed...base timing was 15 degress on my car, with a peak of 26 degrees at WOT.

Adam

 

Sorry, I must have used the wrong terminology. By "base" I meant the timing that the ECU spits out, rather than the eManage timing adjustment.

at WOT on my TT, I see 20-24 degress of total advance. When I subtract out the 6 degress by eManage is pulling, I get a net timing advnace of 14-18 degrees. It's not perfect, becuase the ECU timing fluctuates ever so slightly with F/I...due to the knock sensor. And Z1, TS targets about 16 degrees of timing at WOT...this is normal and safe with F/I...not miniscule. More than that with our high compression can mean boom!

At cruise, I am at 45degrees of timing advance. Timing is inversely proportional to engine load.

 

I gotcha....where did you see 16 being ideal with this motor? That is a very small amount of advance to have. You want to taper timing downward as a means of keeping detonation in check...but not to the point where your advance at WOT is the same as your base timing (timing at idle)....you are giving up boatloads of torque and netting (probably) higher than necessary EGT's.

You gotta get that fp gauge in there and do some more logging to see how everything is reacting together....better yet, get that MAF out of there, convert to MAP, and really start learning what you are leaving on the table

adam

 

It's what TS is using. It kinda makes sense. With an N/A car, I would probably be seeing about 25 degress of advance in WOT...maybe someone with OBDII scanner can confirm that.

TS errs on the side of caution, and I would agree..that with 10.3:1 I dont wanna take any chances. I dont know for certain if its ideal, but I do know my car will ping if I dont take out at least 5-6 degrees of advance....guaranteed...and that's at 11:1 A/F

 

I hear what you are saying..it works for sure....I just wonder what your EGT's are doing

I am telling you, get that fuel pressure gauge in there as well........

 

As soon as I get my car back...I have the gauge sitting on my shelf.

 

Sorry I forgot to get the info . . .will work on it today.

The 03's and 04's timing is different if anyone wants to know.

I have data on probably 5 or more cars (multiple runs each) somewhere. Stock, mild modified, TS N/A modified maps, and TS F/I maps. I will look this afternoon. Its all printed out on receipt paper from the consult in 75-100 rpm increments.

 

Would like to see! Having some A/F issues between 5800-6700 rpm's. At 5800 it dips to 10.9. At 6100 it is at 10.1. At 6500 it is at 10.8. At 6750 it is back up to 11.0. Max POWER = 324. Max TORQUE = 276.3.

Have the SS R4 Program. Albuquerque is at 5094 feet, so took Vortech suggested changing the "washer" in the FMU to #6 Vs #8. Big improvement! Don't know if going to #4 would help. Any other suggestions as to how to lean things out between 5800 - 6700 rpm's?

 

Stock / Mild Modified Stock 2003 350Z

idle 30+
2000-2350 21-22
2350-2763 23-25
2813-3738 26-27
3775-4200 25-26
4200-4300 24-25
4300-4750 22-23
4800-5075 24-25
5125-5763 22-23
5800-6075 24
6125-6375 26
6413-6575 28-29

I have the maps from my 10 or so ecu flashes. I dont want to post those for business reasons but if you have specific questions about what works and what does not work on N/A, I may be able to help you via PM. I also dont want to show the timing charts for the F/I flash without permission from Technosquare. You guys that have it already can post that if you want.

 

VandyZ: Thanks man... that will help me a lot when it comes to building a decent timing map to start with before I begin tuning the car on the FCON.

Thanks!!!

-Charles

 

No problem. Tomorrow I will scan the actual tape that has all the values and send you the pic. That may be even better for what you need.

 

Thats awesome...thanks for sharing Adam!

Looks to match up relatively closely with what I observed on OBD runs. I have a 2004, and running f/i, the ECU is using about one to two more degrees of retarding at 6psi.