My Cobb AP observations...

Discussion in 'Fiesta ST EcoBoost™ Tuning' started by pelotonracer2, Dec 26, 2013.

  1. pelotonracer2

    pelotonracer2 Active Member

    Finally got the Cobb AP installed this morning. I initially installed the 91 octane stage 1 map due to everyone saying it was better than the 93 map. Peak boost on the 91 map was 19.92 psi, but on average it is hitting 19.5-ish. The max boost run that produced that number was in 2nd gear. [​IMG] I was seeing 17-18 psi in first gear, but the gear run out is so short it's hard for me to visually read the gauge. I can't really tell on the butt-dyno if the engine is making any more power but I plan on doing a dyno test in a few weeks with all three maps (stock, 91 and 93) just so I can document the output differences on paper. I also tried the 93 octane stage 1 map and concur with others findings that it's not nearly as "responsive" as the 91 map. I have a feeling Cobb is going to want to go back to the drawing board in regards to the 93 map. I still think the 91 octane stage 1 map could be tweaked for a smidge more for a 93 octane car. Boost seems to taper down a bit too much as rpm climbs. I think I remember reading that the 93 map doesn't have quite the taper down and runs 1-2 psi higher at upper rpm. It just appears as if the A/F ratio targets are set too rich on the 93 map and that could be an issue. The engine seems a bit muffled compared to the 91. I was kind of hoping to see peak psi around at least 20.5 psi. Mine seems to be displaying peak boost numbers with nothing erratic showing up like others have. I only drove the FiST about 12 miles since I installed the 91 map. Wondering if all the short/long term fuel trims and speed density learning are erased with the reflash (I would think they would be). Overall I like the AP and can't wait for the Racer Access to be released.
     
  2. Register or Sign in

    Advertisement Sponsor

     
  3. McRib 1s Back

    McRib 1s Back Well-Known Member

    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! :)
     
    pelotonracer2 likes this.
  4. pelotonracer2

    pelotonracer2 Active Member

    Yeah, throttle tip in did seem better which would indicate more timing advance just off idle. However, what bothered me more was the muted exhaust at WOT. Either the knock sensors are encountering pinging and retarding the timing so much that it just runs like @ss at higher rpm OR it is running too rich. Boost targets were about the same (peak) on both tunes, although I think the boost taper down is more on the 91 map. The 91 map just "sounds" crisper through-out the range and seems to pull harder through the range.
     
  5. McRib 1s Back

    McRib 1s Back Well-Known Member

    Have you tried watching the knock sensors under load? Maybe turn on data logging -- that could be quite revealing!
     
  6. pelotonracer2

    pelotonracer2 Active Member

    That's next. :)
     
  7. pelotonracer2

    pelotonracer2 Active Member

    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 safely get out of the engine adjusting targets to 11.8:1 instead of 11:1 (at higher rpm) and changing the rpm to boost relationships just a small percentage while adding 1-2 psi from 2500-rpm to 4500 rpm.
     
    Last edited: Dec 26, 2013
  8. McRib 1s Back

    McRib 1s Back Well-Known Member

    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! ;)
     
    pelotonracer2 likes this.
  9. pelotonracer2

    pelotonracer2 Active Member

    Yeah, my bad... I meant to just type whp. lol.
     
  10. stuntdoogie

    stuntdoogie Active Member

    *Noob taking notes*

    Sent from my SPH-D710 using Tapatalk
     
  11. Mikeygti

    Mikeygti Active Member

    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 :rolleyes:
    Also what I'm really having difficulty with, is risking the mfgs warranty by installing this product :scared:
     
    pelotonracer2 likes this.
  12. stuntdoogie

    stuntdoogie Active Member

    I only tested for about 1hr on 91 and I think I like it....cant wait to get out of work to drive some more.

    Sent from my SPH-D710 using Tapatalk
     
    pelotonracer2 likes this.
  13. stuntdoogie

    stuntdoogie Active Member

    You can always revert back to stock map before taking your car to dealer.

    Sent from my SPH-D710 using Tapatalk
     
  14. McRib 1s Back

    McRib 1s Back Well-Known Member

    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.
     
  15. pelotonracer2

    pelotonracer2 Active Member

    It just gets better with more miles as the ECU relearns everything. I have about 100 miles on mine now and absolutely love it (the 91 stage one OTS map).
     
  16. Mayhem

    Mayhem Active Member

    Wait for one of their sales to pop up again.

    You can get 93 out here. As well as 94.

    Not all brands though. And I run 91 personally.

    As far as warranty.. I'm with you on that concern. I've had some pretty Nazi dealerships. Unfortunately it comes down to the dealership largely... You could consult your dealer and see what their stance is as far as tuner mods before taking the leap of faith.

    That said, there's nothing to say they won't be singing a different note, if they can in any way fault your mods for anything that could potentially cost money covering. And even if they don't find fault, they could refuse to do warranty work on a car they suspect to have had inappropriate mods.. (Depending what sort of dealer they are).. That is on the more extreme end of the spectrum. But a possibility none the less.

    And even then it's not just the dealer's discretion, as they have to photo & document the car and send it in to Ford to be approved for coverage..

    I've heard both the good and the bad stories.... So it's really up to you on whether or not to chance it unfortunately.

    Odd's seem to sway in favor of it not being an issue... But my luck never favors the odd's... lol So we'll see.
     
  17. Mikeygti

    Mikeygti Active Member

    So I take it you won't be installing one anytime soon ? lol
     
  18. Mayhem

    Mayhem Active Member

    I'll probably be going with wheels / exhaust / and some appearance mods before I get to the point where I need to make that decision :p AccessPorts not at the top of my list. It is on the radar, but not planning on it any time "soon".

    If I go with one though, I'll go the Cobb route.
     
  19. stuntdoogie

    stuntdoogie Active Member

    I love this tune! Just got home from 3 hrs of spirited driving on hwy and backroads and damn has she awoken....Gonna try 93 tune tonorrow filled up my tank with 93 BP Octane.

    Sent from my SPH-D710 using Tapatalk
     
    RodMoe likes this.
  20. joe@2j-racing

    joe@2j-racing Active Member

    I ran nearly straight 98oct and switched to the 93map and it was good for a couple laps, then tapered down to at or below the 91map performance. I am running only on the 91map till they get it sorted out. I do wish it would hit over 19psi. Never seems to crest that level no matter the gear.
     
  21. stuntdoogie

    stuntdoogie Active Member

    same here 19psi
     

Share This Page