reliability of modded Fiestas

Discussion in 'Fiesta ST Engine Upgrades' started by RevinRed302, Mar 31, 2015.

  1. RevinRed302

    RevinRed302 Member

    I'm considering starting to mod my car. Im looking into the Cobb stages primarily, because they seem to have a pretty good reputation. My '15 FiST is, and will continue to be my DD though, so I don't want to start going parts crazy before I make sure that I won't turn my car into a money pit. My biggest fear is that I will get to Cobb stage 2, and 15,000 miles later something will break and end up costing me a bunch of money/ down time. How reliable have your cars been since tuning/modding? Does any one daily their modded FiST without any drama whatsoever? How many miles do you have on your modded cars?
     
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  3. RevinRed302

    RevinRed302 Member

    I'm considering starting to mod my car. Im looking into the Cobb stages primarily, because they seem to have a pretty good reputation. My '15 FiST is, and will continue to be my DD though, so I don't want to start going parts crazy before I make sure that I won't turn my car into a money pit. My biggest fear is that I will get to Cobb stage 2, and 15,000 miles later something will break and end up costing me a bunch of money/ down time. How reliable have your cars been since tuning/modding? Does any one daily their modded FiST without any drama whatsoever? How many miles do you have on your modded cars?
     
  4. Cesso

    Cesso Member

    Now my car is stock and has less than 2,000 miles on it, so I can't speak on this matter personally, however these cars have exhibited none of the mechanical weaknesses that the Focus ST has (blowing ringlands). On the forums where problems are more apparent than in real life, motor trouble is very rare for modded Fiesta STs. The only failures that seem to occur are mostly limited to a few faulty transmissions from a few months of production, and one member broke an axle from launching hard at the dragstrip with far more than the stock power level. The Cobb stages are proven to work and should not cause any problems for you, their products are well thought out and thoroughly tested.
     
    Chuckable likes this.
  5. Chuckable

    Chuckable Member

    I'm sure you've already considered this, but I'll just state it again. Mountune is the only way to go to keep your warranty. That's not exactly the question you're asking, but it's related because if by chance the modding makes the car unreliable then at least you have a warranty to remedy the problem. With that said, I have the Mountune MP215, FMIC and charge pipes for a few thousand miles and no problems. I'm sure it's designed to operate within factory limits for warranty preservation sake. As to Cobb, it's an excellent company no doubt with great products. You'll probably never have any problems with them. One last thing, though, if you're going to judiciously use launch control and flat foot shifting as you get with the Cobb AP, I can't imagine your tranny is going to last too long!
     
    RevinRed302 likes this.
  6. Mr UFO

    Mr UFO Active Member

    14000 mi
    3 track days and 3 autox on cobb stage 1.
    2 track days and 1 autox on cobb stage 2.
    Only smiles so far!
     
    ISO100 and RevinRed302 like this.
  7. RevinRed302

    RevinRed302 Member

    Those are the stories I want to hear Mr UFO!
     
  8. Mr UFO

    Mr UFO Active Member

    I just switched to an etune Mountune map and I must say it is fantastic. Much smoother than the Cobb ots maps.
    If you're concerned about the warranty go with the Mountune 215 kit!
     
  9. ISO100

    ISO100 Member

    I'm getting etuned by Randy soon.
     
    Golfguy11800 and Mr UFO like this.
  10. RodMoe

    RodMoe Well-Known Member

    I do think COBB has two type of Launch control's one with and one without boost so I am not sure why you would stress your tranny anymore than any other type of driving ??
     
  11. Chuckable

    Chuckable Member

    RodMoe, that may well be true as I don't actively follow Cobb's products now that I've chosen to go with Mountune. I imagine that any clutch drop on launch control, whether on boost or not, and whether tuned or not, is going to stress the tranny (and clutch) more than everyday driving. Certainly a no boost launch control clutch drop wouldn't be as stressful as a high boost drop. Don't want to get too far off topic, though.
     
  12. RodMoe

    RodMoe Well-Known Member

    OK well I guess to me launch control is not just reving the motor and sidestepping the clutch any bozo can do that.
    But as ya said on topic if you are in the least worried about warranty go Mountune and enjoy what they have.. Anything else is a crap shoot whether it is covered or not..
     
  13. BostonDriver

    BostonDriver Member

    Both Cobb and mountune have quality parts. I think mountunes are the best you can get in terms of quality and engineering given their experience with the FiST. that's why I've gone full mountune. Their parts fit like factory, require zero irreversible modding of other components on install and they're so confident they've gone the extra mile to get them warranty friendly. Stage 2 isn't really much in terms of parts either... Intake, intercooler and a tune. My car is a daily driver and I haven't had one issue with my stage 2 mountune parts for the 7000 miles on them. I've got the mountune full intercooler pipe kit and cat waiting to be installed now. Just waiting for the catback so I can do it all at once.
     
    XR650R and Zormecteon like this.
  14. moshaholic2

    moshaholic2 Active Member

    Cobb stage one was installed by 500 miles. De-cat DP, mountune intake and hoses, FS Werks exhaust and custom Mountune tune by 3000 miles. 12500 miles now, no isuues.
     
    Leichtwork@gmail and RevinRed302 like this.
  15. koozy

    koozy Active Member

    Mountune uses Cobbs Accessport. Mountune needs Cobb. Cobb doesn't need Mountune. Mountune should create their own handheld tuner and be self reliant against it's competitors.
     
  16. golfhack

    golfhack Member

    Cobb stage 1 at around 1500 miles, downpipe and a Randy bespoke tune around 15k, FMIC and stage 3 at 23k. Just broke 29k and everything is good.
     
    Golfguy11800 and RevinRed302 like this.
  17. BRGT350

    BRGT350 Well-Known Member Staff Member

    Mountune and Cobb both make some of the highest quality and best engineered products, however, proper care, quality fuel, and driving habits will play largely to how well a modified car will last (true of a stock one as well). The biggest killer to modified Fiesta and Focus ST's seems to be from people running a very aggressive tune without the required bolt-on parts. For example, running a stage 2 tune on a stock intercooler.
     
    RevinRed302 likes this.
  18. horrorbiz

    horrorbiz Member

    My FiST is my daily driver. I'm running Cobb parts, stage 2.5 with a protune. I haven't had any issues and the car runs great. I also ran Cobb parts and a tune on my old WRX for 60k miles without any issues.
     

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