2018 turbos - Page 3

2018 turbos

This is a discussion on 2018 turbos within the F150 Ecoboost Performance forums, part of the F150 Ecoboost Garage category; Does anyone know if all 2018ís have different turbos or could early 2018s have 2017 turbos? Just curious since my 2018 was built in late ...

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  1. #21
    Ecoboost Sr Member F150STX's Avatar

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    Does anyone know if all 2018ís have different turbos or could early 2018s have 2017 turbos? Just curious since my 2018 was built in late 2017


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    Gold Supporting Member Blown F-150's Avatar
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    Quote Originally Posted by F150STX View Post
    Does anyone know if all 2018’s have different turbos or could early 2018s have 2017 turbos? Just curious since my 2018 was built in late 2017


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    Should be linked to the model year and not the build date.

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    Ecoboost Regular JoeKool315's Avatar

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    So they made the turbos "bigger" or put out more PSI from '17 to '18 but the HP/TRQ ratings stayed the same, even for the '19's? I know the 2nd gen 3.5 got a good boost from gen1 but if that added ~2lbs of boost via turbo improvements you'd think those numbers would show in a modest increase on their advertising & bragging rights for one of their "best in class" motor(s). I suppose they might have wanted to keep the 75hp gap between the 3.5 on the raptor and the other ... run-of-the-mill F150's LOL.

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  5. #24
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    Quote Originally Posted by JoeKool315 View Post
    So they made the turbos "bigger" or put out more PSI from '17 to '18 but the HP/TRQ ratings stayed the same, even for the '19's? I know the 2nd gen 3.5 got a good boost from gen1 but if that added ~2lbs of boost via turbo improvements you'd think those numbers would show in a modest increase on their advertising & bragging rights for one of their "best in class" motor(s). I suppose they might have wanted to keep the 75hp gap between the 3.5 on the raptor and the other ... run-of-the-mill F150's LOL.
    Remember PSI doesnít translate to air flow. So one turbo making 21 psi and another making 17 arenít necessarily relevant to one another and how much power they make.

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    Ecoboost Regular JoeKool315's Avatar

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    I get that and know you can max out cfm of the intake system feeding the motor but as long as you don't have a bottleneck somewhere and already at peak cfm with the current boot (which stock systems rarely if ever do) then a couple psi gain should have some modest output gains as well.

    On a built and tuned system that's peaked out on flow #'s already, you're absolutely right.

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  7. #26
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    Quote Originally Posted by JoeKool315 View Post
    I get that and know you can max out cfm of the intake system feeding the motor but as long as you don't have a bottleneck somewhere and already at peak cfm with the current boot (which stock systems rarely if ever do) then a couple psi gain should have some modest output gains as well.

    On a built and tuned system that's peaked out on flow #'s already, you're absolutely right.
    Itís all in the Tune. The PCM is commanding a certain HP and the motor obliges.

    I can see already that the 2019 Raptor turbos flow considerably more than the GTs. I know some of it is the head and chamber porting, but still, they can flow more.


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    Eco-Beast mass-hole's Avatar

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    Quote Originally Posted by RMB_Ryan View Post
    Remember PSI doesn’t translate to air flow. So one turbo making 21 psi and another making 17 aren’t necessarily relevant to one another and how much power they make.
    I do not understand how this is possible. Isnt the PSI created by the engines resistance to the air flow. So if you are flowing the same CFM then the pressure would need to be the same? Barring a different turbine being used of course, because that changes the resistance to flow.

    Genuinely curious how this works, I have heard this many times and it does not compute.
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  9. #28
    Ecoboost Regular mattr66's Avatar

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    Quote Originally Posted by mass-hole View Post
    I do not understand how this is possible. Isnt the PSI created by the engines resistance to the air flow. So if you are flowing the same CFM then the pressure would need to be the same? Barring a different turbine being used of course, because that changes the resistance to flow.

    Genuinely curious how this works, I have heard this many times and it does not compute.
    17 psi on EFRS is prob 50-75 hp more power (depending on head porting) than 17 psi with the stock turbos because of the extra exhaust flow.

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    Quote Originally Posted by mattr66 View Post
    17 psi on EFRS is prob 50-75 hp more power (depending on head porting) than 17 psi with the stock turbos because of the extra exhaust flow.

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    right but what about GT's. Same turbine as stock but bigger compressor, yet I have heard people say they will flow more at the same boost.
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    Gold Supporting Member Blown F-150's Avatar
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    Quote Originally Posted by mass-hole View Post
    right but what about GT's. Same turbine as stock but bigger compressor, yet I have heard people say they will flow more at the same boost.
    I don't know what kind of black magic is in those things, but yes 100% they do flow more at the same PSI. 18psi to 18psi with no other changes (other than accommodating tune) and the GT's flowed 5#/min more at the same RPM.

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