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The 2.5L discussion thread

This is a discussion on The 2.5L discussion thread within the Focus RS Performance forums, part of the Focus RS Garage category; Originally Posted by gte Does Pablo = ScoobaSteve? Negatory good buddy. Scoobasteve = Dan M.. Sorry, Very long story....

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Thread: The 2.5L discussion thread

  1. #21
    RS Member Scoobasteve's Avatar
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    Quote Originally Posted by gte View Post
    Does Pablo = ScoobaSteve?
    Negatory good buddy. Scoobasteve = Dan M.. Sorry, Very long story.
    gte likes this.
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    Quote Originally Posted by MN_RS View Post
    I have been following Pablo's progress at speed perf6rmanc3 and might go this route when the time comes. I trust them as well as DHM.


    https://www.facebook.com/SpeedPerf6r...2800116262885/
    Cool video!
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  3. #23
    RS Pro DeltaT's Avatar
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    Quote Originally Posted by Kingkalukan View Post
    Haha. Well the 2.5 block is a 2.3 that is modified. A 2.0 block can also be modified to 2.5 or you can simply run it in 2.3 by just dropping our crankshaft in. The 2.0 block is stout, really thick metals.
    What block mods need to be done to stuff the 2.0 block into the RS successfully? Machining for the PTU?
    - "We’re joined by plenty of exotic metal, including a 997 Porsche 911 GT3 RS, a Ferrari 458 Italia, an Audi R8 and two Porsche Cayman GT4s – all cars that should wipe the floor with the Focus RS. But they don’t." - Autocar
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  5. #24
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    Quote Originally Posted by DeltaT View Post
    What block mods need to be done to stuff the 2.0 block into the RS successfully? Machining for the PTU?
    That is what I was originally told. But I conferred with scoobasteve, who already has the 2.3l 2.0 block in his car and he said no machining was necessary even for the PTU. Everything just transferred right over.


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    RS Member Tempest's Avatar
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    Can't wait to get my engine from DHM! Woot!

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    Quote Originally Posted by Kingkalukan View Post
    That is what I was originally told. But I conferred with scoobasteve, who already has the 2.3l 2.0 block in his car and he said no machining was necessary even for the PTU. Everything just transferred right over.


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    Makes me wonder why everyone doesn't just do this instead of screwing around with the RS/MEB block...

    Is it really a freaking drop-in, just like that? Sleeve and stroke the 2.0 and call it a day. Aren't those blocks super cheap, to boot?

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    The 2.5L discussion thread

    Quote Originally Posted by Hoon Dog View Post
    Makes me wonder why everyone doesn't just do this instead of screwing around with the RS/MEB block...

    Is it really a freaking drop-in, just like that? Sleeve and stroke the 2.0 and call it a day. Aren't those blocks super cheap, to boot?
    Yep. Just need to use the correct head gasket and you are good to go. Why doesn't everyone do it? Probably because they just started figuring out that it works. Most of the ecoboost tuners I've talked to all have this in the works, just aren't completely finished. Now we have 2 companies with this build complete: speed performance and DHM. It's just the new to the scene guys that are trying to weld support the 2.3 block.

    Remember Adams picture of the welded block was not to reinforce it. It was to add material for larger head studs in order to prevent head lift on a high horsepower build.


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  9. #28
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    I would have done this had I known about it.


    Quote Originally Posted by Hoon Dog View Post
    Makes me wonder why everyone doesn't just do this instead of screwing around with the RS/MEB block...

    Is it really a freaking drop-in, just like that? Sleeve and stroke the 2.0 and call it a day. Aren't those blocks super cheap, to boot?
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    Quote Originally Posted by Kingkalukan View Post
    Yep. Just need to use the correct head gasket and you are good to go. Why doesn't everyone do it? Probably because they just started figuring out that it works. Most of the ecoboost tuners I've talked to all have this in the works, just aren't completely finished. Now we have 2 companies with this build complete: speed performance and DHM. It's just the new to the scene guys that are trying to weld support the 2.3 block.

    Remember Adams picture of the welded block was not to reinforce it. It was to add material for larger head studs in order to prevent head lift on a high horsepower build.


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    Makes sense!

    And yeah, metallurgical property changes aside, welding on the block never seemed like the "right" solution, regardless of who was doing it (I know others besides Adam were offering it). Easier/better to just start on a more appropriate platform and go from there, than "reverse engineer" (if you can call it that) something subpar.

    I personally am very excited about this, since I seem to have the benefit of Murphy's law when it comes to performance mods.

    Noob question, but I'm new to the Forced Induction world. Would increasing displacement to 2.5L subsequently increase low-end torque the same way it would on an NA motor? Or does that have too many variables with a boosted engine, depending on turbo setup and myriad other parts? Asking because this is still my DD and I want to have streetable power, not just a ton of power at 5000+ RPM. I know I've seen insane HP figures on a big turbo, but that usually comes at the expense of a "streetable" torque curve.

    I know, I know, I probably don't NEED a built motor for a daily driver and weekend track car, but whatever. I'd rather be overbuilt and confident in the motor instead of always worried in the back of my mind.
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    The 2.5L discussion thread

    Quote Originally Posted by Hoon Dog View Post
    Makes sense!

    And yeah, metallurgical property changes aside, welding on the block never seemed like the "right" solution, regardless of who was doing it (I know others besides Adam were offering it). Easier/better to just start on a more appropriate platform and go from there, than "reverse engineer" (if you can call it that) something subpar.

    I personally am very excited about this, since I seem to have the benefit of Murphy's law when it comes to performance mods.

    Noob question, but I'm new to the Forced Induction world. Would increasing displacement to 2.5L subsequently increase low-end torque the same way it would on an NA motor? Or does that have too many variables with a boosted engine, depending on turbo setup and myriad other parts? Asking because this is still my DD and I want to have streetable power, not just a ton of power at 5000+ RPM. I know I've seen insane HP figures on a big turbo, but that usually comes at the expense of a "streetable" torque curve.

    I know, I know, I probably don't NEED a built motor for a daily driver and weekend track car, but whatever. I'd rather be overbuilt and confident in the motor instead of always worried in the back of my mind.
    I would like to add a couple things and then I will also answer your question to the best of my ability.

    I have a built motor going into my RS this week. It is through Adam. It is NOT a 2.0 block and I do not believe it will crack. I really do think that the cracks that have happened are due to poor casting done as we have yet to see a single engine crack that has a build date outside of the suspected dates to have poor casting.

    I do think a 2.0 block is clearly superior to the 2.3 but I didn't want to wait on those new builds. Adam can absolutely do a 2.0 block 2.3l build, but he said I would have to wait a few months and I want to enjoy my build for this summer track season.

    About the 2.5:
    I am not sure if adding .2 of a liter will really have any major effect on your low end torque. I have a feeling it may increase it, but I don't think it will be significant enough to be worth the money. It's an interesting thing to do for fun, but I can't see it being cost effective.


    About your horsepower and torque targets while keeping the vehicle streetable. I recommend following me, sometime in the next 2 weeks I will have my built motor in the car and a Vargas stage 2+ turbo on it. We are hoping for 475-550 whp on ethanol with only a 300-500rpm lag compared to stock, which would absolutely retain its streetability. I'll make sure to make a post with details once it's complete, good or bad


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    Last edited by Kingkalukan; 05-19-2017 at 01:18 PM.
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