ATP Turbo Upgrade Testing 13.6 1/4 mile ET 103 mph

Discussion in 'Fiesta ST Engine Upgrades' started by RodMoe, Apr 8, 2014.

  1. wash

    wash Active Member

    In the Mustang GT500 and supercharged Cobras, cold air intakes and large throttle bodies make power, especially when the supercharger is upgraded.

    While a positive displacement blower and a turbo are not the same, I think its probably not correct to say intake restriction doesn't matter on our engine.

    I think that idea keeps getting passed around because its easier to crank up the boost than make a free flowing intake.
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  3. moshaholic2

    moshaholic2 Active Member

    I think some of it is also our small engine displacement doesnt necessarily move or need massive volumes of air (relative to turbo size).

    1.6l is pretty damn small. Especially compared to a 5.0L mustang engine (for those that cant visualize it.... Our engine is only 3/4 of a single 2L soda bottle vs a mustang which equals 2 1/2 two liter bottles)
  4. raamaudio

    raamaudio Active Member

    Just make sure to consider how much air is being forced into an engine, it is the same as an effective increase in displacement;)
  5. moshaholic2

    moshaholic2 Active Member

    Correct. But, thats a direct corellation to our turbo size. Which when stock is small. Bigger turbos will need more air. But, ATP has illustrated that we are good atleast to 300hp with the next size turbo. Beyond that, we'll just have to wait and see :)
  6. raamaudio

    raamaudio Active Member

    I like the looks of the dyno chart for the GT25 as it has a nice linear power curve which means very drivable and 300 HP in these cars will be fast, especially if the whole car is sorted out in balance and then remove a bit of weight....

    Moving to the next level up in turbo size may yield more peak power but if you give up bottom end you are giving up power where you need it the most for day to day driving which often times leads to a slower car in many situations where instant power may save your bacon. Having somebody about to run up your arse, t-bone you, etc, I would rather jump out of the way instead of sitting waiting for a turbo to spool up.

    Since teh stock turbo does not increase HP much with mods but torque goes up considerably, there is still an increase in displacement over the same size NA engine and then some to gain so it is still effectively larger than 1.6, maybe a 2.8 or so, I will let others do the math if they so choose:)

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