Just be sure to change the plugs if you tune and avoid my mistake, the RR14YS sit deeper in the chamber, so the have a slight effect of advancing ignition, which is perfectly fine on stock software but not suitable for the added heat of a tune, change to RR14S if you run a tune or OE plugs work also. Brisk RR14YS plugs (noticeable increase in response and smooth operation). If you don't want to tune, I found (before I tuned) that a really good combination on the stock software is the following:ģ. Any one of the 4 above are great choices and all have stellar track records for reliability. Lets not forget Ford Performance, who also has a very respectable tune but also allows you to keep the factory warranty (at reduced mileage of 36k vs. Livernois can be used on a bone stock car, I'm not sure about Tune+ or Lund, but I"m sure they have stock hardware options as well. If you go with a tune from Livernois, Tune+, Lund or another highly reputable and knowledgeable tuner you will have a very different experience. If you do a search for blown Focus ST engines, you'll find a list on a forum and a very sizable portion of those blown engines were running Cobb Stage 3. I am going to knock Cobb a bit, their track record suggests they do not understand the Ecoboost architecture as well as say Tune+, Livernois, Lund or other tuners which specialize in ecoboost engines and other domestic brews (Chevy and Dodge also). That being said, Cobb does not specialize in domestic cars, they specialize in imports and their bred and butter are Boxer engine's used in Subaru's (which interestingly enough are not the most robust engine despite propaganda, a quick search for blown WRX engine will reveal many pages worth on all sorts of forums stock and modified). You need both to be optimized to the make the most of the energy contained in the fuel. It is not more important than hardware, but just as important. PCM software plays a HUGE role in any modern engine's performance. I'm also reluctant to toss a solid tune at it now that people aren popping their motors,Seems like the more and more I own this car,the more things I find to dislike about it.Are these cars just fragile and finicky or are people blowing them up for other reasons,Having a hard time pulling the trigger on more parts if these things are junk. I haven't had Adam send me a tune file yet do to the lack of an intercooler,but regardless of the tune am I expected to loose all that nice throttle response from stock,Or does adams tune keep the car nice and torquey with the oem throttle response or more,It really seems like the stage 1 tune takes way longer to spool in both modes,Personally I think the tune stinks. Does anyone else feel the stg 1 91 octane tune feels soggy in Drive and sport mode compared to the stock Ford tune,Seems like the trans shift points are way softer in drive mode but do shift later,Ive noticed the stock tune feels crisp and engaged in tip in power in every gear,I do feel the cobb tune pulls a tad harder in the mid range and top end but seems like it takes way more throttle input to get the car moving.
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