[McRib 1s Back]

Fun! Nice post, and good to get more data points on the 93 octane map. I'm still going to try it with 96/97 octane to see if is just a bit too aggressive on 93. I'm optimistic!

 

[McRib 1s Back]

Have you tried watching the knock sensors under load? Maybe turn on data logging -- that could be quite revealing!

 

[McRib 1s Back]

I had the same issue with ALL the OTS Cobb maps on my MS3 EXCEPT the "stock" 93 octane stage 0 map which worked the best, even with modifications. Some tweaking of the map turned a very good map into an amazing map. I think 10.8: 1 AFR is way too rich... even on a turbo car. It's amazing how much more you can get for setting targets to 11.8:1 (at higher rpm) and changing the rpm to boost relationships just a small percentage.

That makes sense to me. Even the more aggressive settings (over stock) are situational; I can see where the local test area might have called for a richer AFR due to heat/humidity, etc. It's great to be able to tweak to our own preferences and tolerances for safety.

My most recent WRX had an exhaust and CAI along with a Cobb map. It felt awesome from day one, with no need to tweak. I can already tell I'll never be done playing with this new toy.

Oh yeah, I understood your use of "MS3" to mean "MazdaSpeed 3". Is that right? If so, why did you use "RWHP"? MS3s are very FWD and the torque-steer champions!

 

[McRib 1s Back]

So are those that purchased this product for 500.00 or so, happy with the gains on the 91 oct map(s) ?
I live in Canada where 93 is not available
Also what I'm really having difficulty with, is risking the mfgs warranty by installing this product :scared:

The 91 octane map is great fun. Most of us aren't too worried about problems with Ford -- especially if you keep it mildly tuned. The AP with a 91 octane map isn't a big deal for most dealerships.