Ptuning sent me a AEM EMS series 2 base map to start the car and get to the tuner. The tuner is 270 miles away. In the mean time, I read everything I can find about the AEM software. Studied other maps I found at the AEM forums. Offered to buy a map from ptuning, but they don't have a 91oct map. Only 93oct. They won't take my $350. So I went for a ride on the basemap monitoring AF. The Ptuning fuel map and timing map was spot on giving me 14.7 at cruise and 12's on low boost below 5000rpm. Partial throttle was smooth.

Besides the fuel map and timing map, everything was at default values based off the AEM S2000 basemap. Had to choose the correct O2 sensor and O2 feed back control in the setup Wizard. Also made sure all of the settings were correct in the Wizard. Also turn on knock sensor feedback and set to 2volts.

Idle was rough. Used the info at http://forums.evolutionm.net/aem-ems...e-aem-ecu.html to get a good idle down to 900rpm. Add some fuel values to the fuel map to the low rpm area to keep the engine from dying when the SPAL fan kicks in. When it kicks in, everything browns out.

Coolant temp was high up in the 200-210 and the SPAL fan was always on. Used the calibrated values from https://www.s2ki.com/s2000/topic/184...-calibrations/ for the AIT and Coolant temp calibration. Now the car coolant temp runs at 180F and IAT in the 80-100F at cruise. The SPAL fan now turns on only when the coolant temp reaches 200F. It comes on only during idle and for about 10-20secs. Turns off once the coolant temp drops below 200.







I'm using two O2 sensors. Had to make sure I am not working with a faulty O2 sensor. AEM Wideband AF UEGO 4100 is wired to the AEM EMS. Found a 10yr old LM-1 stashed in a old box. The LM-1 and O2 sensor still works and matches exactly to the AEM wideband. No grounding issued found. I wired the AEM wideband ground straight to the battery and the readings on the gauge matches the software.

The Laptop holder works well. It bounces around during bumpy roads, but is stable enough to stay in place. http://www.newegg.com/Product/Produc...82E16882021069

First thing I did was run off the 7psi wastegate spring. Did a couple WOT passes to 5000rpms. Car ran a rich AF at WOT. Routed the MAC Boost Valve per the instructions and turned on boost control. Set to run wastegate boost. Holy crap boost creep. I am on the 2.25 regulating disc BTW. AF in the 10's. The basemap runs rich. Knock volts below 1volt.



Subtracted wot fuel cells to run leaner and set the boost at 11psi. AF looks okay.



Boost seems to come on so late compared to ptuning's dyno graph. Theirs is a GT3076R and AP2? Haven't found another AP1 and GTX3076R dyno to compare.



So today, I decided to put in the 2.5 regulating disc and do a wot run. Holy crap, boost creeps to 13's (Green line). So I decided to set my max boost to 12.9 and reduce timing up top. I'm still on 91oct btw. Had someone driving while I was logging so he was only comfortable revving to 8K rpm.



Comparison between 2.25 regulating disc and 2.5 regulating disc vs. boost. Boost comes on a tad quicker. With the Ptuning 3" dual exhaust on the 2.25 regulating disc, drone was so bad, I contemplated everyday to go back to the stock exhaust. I went so far to pad the doors, trunk, dashboard to eliminate rattles and drone. It worked somewhat. So today, experimenting with the 2.5 regulating disc, I noticed that the drone was a little less and tolerable. Maybe I'm deaf now. Even my friend noticed when we went for a wot test. So here I'm at 13psi with the 2.5 regulating disc on 91oct. So far knock voltage has been good.



The dyno was generated by logging engine load, engine speed, O2#1, and Throttle on WOT run in 3rd gear. The runs were done on the same stretch of road. Software used from: http://www.bradbarnhill.com/projects/VirtualDyno/

 

Nice Numbers. Where did you get that laptop stand?

 

http://www.newegg.com/Product/Produc...9&Tpk=RMS-A520

 

Looks good, keep up the effort and you will be an expert before you know. If you are looking for an ETune, which will help you verify the timing and some of the other advanced features, call Jeff Evans @ Evans Tuning.

 

Keep up the great work indi00, let us know if we can help you with anything else.

Glad to see another PTUNING S2k roaming the streets.

Drew

 

Nice work! Two things on comparing your spool with some results form PTuning: the PTuning dyno chart is from an AP2, so the extra 10% displacement means an automatic ~10% reduction in lag. Also, 93 octane vs. 91 octane. 93 octane should allow more timing in the spool-up region making more torque.

 

Why didint u use the 93 octane tune and just pull some timing?

Either way great work on ur tune.

 

i love your laptop stand. you made me want to get one too. lol. good tune work!

 

i like the laptop stand. sounds like you will be having fun this summer.

 

93 octane is not available at the pump. I was hesitant to boost past 10 due to the gas, but looks like 13psi is okay. I don't see any spikes in the knock volts.

So driving to work with dead traffic on this cold Saturday morning , I launched with a soft second gear rolling to third gear WOT. I nearly shit in my pants. On a full tread 255 40 17 tires, I could feel the tires breaking ever so slightly while I hold steady onto the steering wheels, trying to keep it going straight. It was scary.

The laptop stand can be easily dismounted for a passenger. FYI.

I'm still figuring how to optimize the timing table on a street tune...