andale927's Full-Race EFR 7163 Build (Built Engine)

Discussion in 'Mazdaspeed 3 Build Diaries' started by andale927, Feb 24, 2019.

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  1. Enki

    Enki Motorhead Platinum Member

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    Was that EWG though? I don't recall, and that is a factor. I still think the FR DP is ~le bad though
     
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  2. andale927

    andale927 Greenie Member

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    Sorry maybe I exaggerated, it does increase slightly. But MAF V is the actual measure of airflow, since only the transfer function is modified in the ECU when you add the split second controller.

    Here is a little excerpt:
    upload_2019-9-5_18-47-31.png
     
  3. VashEXE

    VashEXE Silver Member

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    a .1 or .2 increase in MAF V up top is a humongous increase in air flow. That's not a linear increase from 0-5.
     
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  4. Enki

    Enki Motorhead Platinum Member

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    Correct; going from 4.15 to 4.16 is a greater increase than 4.14 to 4.15.
     
  5. andale927

    andale927 Greenie Member

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    Ah shit too many posts to keep up lol. Yeah, it is an exponential curve, but the increase is very small, like .01-.05v.

    Edit: Added an excerpt from 5500-6500 rpm above.

    Also notice that BATs increase pretty dramatically which shows that the turbo is likely at the edge of efficiency.
     
  6. VashEXE

    VashEXE Silver Member

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    You don't have much timing in that thing yet. You have cams right? I'll have to get a log of my flow numbers, but not all things are equal in that either with elevation differences and stuff.
     
  7. andale927

    andale927 Greenie Member

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    For sure, I'd love to see a datalog if you wouldn't mind sharing. I have stock cams, although it is on the list of next modifications. I'll be adding a bit more timing whenever I get a chance to log some more this week.
     
  8. Enki

    Enki Motorhead Platinum Member

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    Stock cams, no headwork? That's why the EFR ain't makin what it should be most likely.

    You can go bigger turbo, sure, but unless you increase the overall VE of the engine, well, you're still trying to run a horse through a doggie door.
     
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  9. andale927

    andale927 Greenie Member

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    Well shit, now I'm gonna have to overnight some cams and install them over the weekend rofl. Would there be much benefit to moderately aggressive cams without porting the exhaust side of the head?
     
  10. Enki

    Enki Motorhead Platinum Member

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    All the gains to be had are in the bowls, though it doesn't really hurt to hog out the hotside to match the gasket. Both Vash and myself have bowl work, no runner work and matched hotsides. Minimal work in the grand scheme.

    Cam it up and bring a fresh set of britches for your first drive.
     
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  11. VashEXE

    VashEXE Silver Member

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    Just remember that even with cams and headwork you're not gonna get to 600, but I'm assuming you already bought the 5558. I'm interested to see the flow/power difference with cams as the only difference. This is really validating my build for me lol.
     
    VashEXE, via a mobile device, Sep 5, 2019
  12. andale927

    andale927 Greenie Member

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    Yeah, I really wish I did the head work at the start. I think I will stick with my current path and just test out both turbos. I won't immediately sell the EFR kit or anything until I decide the route I want to go. I'll probably get the head ported and install cams over the winter when I wouldn't be driving the car anyway... Plenty of time with the long ass Chicago winters. Turbo swaps on the speed really don't take that long and I don't mind the work haha.

    I fucking love the speed platform so I'll do whatever it takes to make the setup perfect.
     
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  13. Enki

    Enki Motorhead Platinum Member

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    Make sure you test with the same spring pressure, though the EWG is already going to flow more up top.
     
  14. andale927

    andale927 Greenie Member

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    Yeah definitely, I really like running the lightest spring possible for the boost control anyway. Will eventually attempt switching to a 4-port MAC valve, even though supposedly people haven't had luck because of the switching frequency of the ECU.
     
  15. andale927

    andale927 Greenie Member

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    Only made 452whp / 434 lb-ft on a mustang dyno. About what I expected with the boost pressure dropping to ~27 psi at peak power, down to 25psi at 6500rpm, I think the turbo has only a little more in it if I add some spring pressure.



    upload_2019-9-7_11-59-51.png
    upload_2019-9-7_12-31-25.png

    My friend on a built motor speed 3 also got dynoed today, he made ~480whp on 36psi boost. I think I can convince him to drop the ATP hotside on his GTX35 now lol, I think he would have made close to 600whp if he swaps in a BNR S6 hotside.

    Here's a vid of his car:
     
    Last edited: Sep 7, 2019
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  16. JohnnyTightlips

    JohnnyTightlips Platinum Member

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    If you were looking for more top end why not do a 5862dbb? You would get the head room you want and I bet spool is very similar to the 5558dbb.
     
  17. alexwlwsn

    alexwlwsn Gold Member

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    Interesting question.
     
  18. Sho

    Sho Silver Member

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    Gen 2 5558dbb in green
    VS gen 1 5862 JB in yellow,
    In case you're curious. received_2404001796552467.jpeg

    Yellow was my ms3. Green is an ms6 on e50


    Power is way low on the 5558, but that may be an issue with that car itself
     
    Sho, via a mobile device, Sep 9, 2019
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  19. alexwlwsn

    alexwlwsn Gold Member

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    This is a pretty apples to tomatoes comparison though IMO since the two cars load up turbos totally differently.
     
  20. Easter Bunny

    Easter Bunny Professional Engineer Silver Member

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    im not clear, are you just swapping turbos and then getting into the headwork later? it would be nice to have a true back to back comparison but that is a bunch of extra work for you to tune twice
     
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