Miata Turbo Forum - Boost cars, acquire cats.

Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   MSPNP (https://www.miataturbo.net/mspnp-55/)
-   -   Gut check - current tune (https://www.miataturbo.net/mspnp-55/gut-check-current-tune-99032/)

wherestheboost 01-16-2019 03:33 PM

Gut check - current tune
 
2 Attachment(s)
Car runs pretty decently at the moment. Would anyone care to look over my tune to see if there are any glaring oddities and/or mistakes etc? This car is a 1999 miata, naturally aspirated, MSPNP2. Thanks!

wherestheboost 01-17-2019 02:34 AM

Crap. Went to sequential fueling...idles like bleh. Stumbles when I blip the throttle during idle. Will retune some high load low rpm regions tomorrow. Worst case I go back to batch.

wherestheboost 01-17-2019 03:03 PM

Went back to batch for now and I think I realized something I may have fubar'd.

I was wondering why the cranking pulsewidth was "so" high - such that I lowered the number (along with ASE and WUE) down so much. Such that at ~65F, my cranking pulsewidth% was... 140. After reading the manuals more - it seems that this number is solely based on the REQ. I have NB2 injectors that flow tested at 282 cc/min at 43.5psi... BUT, at 60psi (I'm in an NB1) it would allegedly be 330 cc/min. I put into the calculator a value of 300 cc/min idiotically to change the VE tables more "conservatively."

Would it then follow...that the crankpulsewidth calculator (at baseline) was calculating based on a 300cc/min injector, but instead was cranking with a 330cc/min injector therefor causing me to lower the PW drastically?

I crank the car at 140% at 65F with an REQ of 10.1 - when it should technically be at 9.1... which means that IF I had it changed to the correct value of 9.1 - the cranking pulse would instead be 155% (140+ ~10%)?

In addition I would need to multiply the entire VE table by that same increase?

Edit: Brought down REQ to 9.1 (from 10.1). Added 11% to VE table. Added 11% to Crank Pulse. Switched to sequential. Turned off accel enrich (under 100 TPSdot). Car is doing well so far. Switched PID settings on closed-loop to "basic" - will dial that in later but it seems I have an oscillating idle and it's widening as time progresses (it narrows for a bit, but then expands). I guess I have a vacuum leak since I'm idling between 36-46 map. But usually right around 42.


All times are GMT -4. The time now is 05:39 PM.


© 2024 MH Sub I, LLC dba Internet Brands