stantaur

Requesting help from someone with a fairly stock S2000 (stock ECU) please. I need to ride along with you with an OBD2-Bluetooth connector feeding RPM & ignition timing data to my phone running the Torque app. Non-invasive, read-only, provides the data seen in text / gauges here: https://youtu.be/UQemAnnBABs

Reason is, I have an S2000 with Hondata FlashPro & what's otherwise a nice, conservative Evans autocross tune. It runs 29-30 degrees ignition advance on average at 60 MPH, flat road constant load, indicating 14-16 inches vacuum and 13-15 degrees throttle position.

That said, the FlashPro setup's highway MPG has been lower than pre-flash (bone stock) though. MPG used to be 28 highway bone-stock, now is 24-25 in same conditions.

Theory is if stock ignition timing is actually a few degrees more than 30-ish, I can easily "smooth in" the stock ignition timing in cruise for that table (and iteratively ensure same air/fuel which has been 14.7-ish) and gain back some highway cruise range. I ran 36-ish in the 9.5:1 turbo car at cruise, but that was a different compression, cams & gearing.

I'm located near Tigard/Beaverton area & glad to meet you at your convenience. Or, if someone has a stock S2000 and has already hooked an OBD2 to log their ECU data, I'd welcome your observed ignition timing at 55 MPH, constant load, flat road...

Thanks,
Stanford

Sabre

If I still had my Ap1, I'd kill a Saturday to head up there to let you do it, but the Ap2 has a reflash for the kraftwerks.
Hopefully someone will offer up.

Ken1997tl

I have an '06 and use Torque connected via bluetooth.

I can do a run this weekend and let you know!

stantaur

Thank you both, and I welcome your insights / observations. I test drove a stock '04 today and plugged the OBD2- Torque app in and saw 35-ish degrees ignition advance, around 3100-3400 RPM and light load.

I smoothed in about 4.5 degrees into the 3D curve for my current FlashPro tune (so it hits 35-ish at those same load points) and this seems the right direction:
1 - There's no increase in knock at those RPM/load bands
2 - Looks like 1-2% less throttle position to hold a given speed vs. prior baseline log at 30 degrees advance.

Still, I welcome more info from you guys to help me solidify my confidence with this cruising map. Thanks again...

#172CR

Ken would be a great candidate Stanford!

Ken1997tl

Update: Going to do a run this afternoon and report back my findings.

I apologize for the delay. Work and in-laws will do that.

Ken1997tl

At 55 mph, flat surface with no a/c running and top down, the ignition was advanced 30.5 degrees. I tried this multiple times and it was very consistent.

#172CR

JumpDriver

you guys get 28mpg? I'm jealous lol im usually around 24-25mpg

Ken1997tl

Long trips with the top up and the A/C not on too high at 70 mph, I can get 27 or 28 mpg.