Disi-MZResponse

Discussion in 'Mazdaspeed 3 Build Diaries' started by Enki, Feb 10, 2016.

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  1. Enki

    Enki Motorhead Platinum Member

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    ...Because they were installed upside down?
     
  2. SharksInSpace

    SharksInSpace Planets and shit. Greenie Member

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    but y tho
     
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  3. Enki

    Enki Motorhead Platinum Member

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    Wasn't on purpose.
     
  4. JohnnyTightlips

    JohnnyTightlips Platinum Member

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    Ok, that's what I was wondering. That sucks.
     
    JohnnyTightlips, via a mobile device, Oct 26, 2019
  5. Easter Bunny

    Easter Bunny Professional Engineer Silver Member

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    I still think a cam alignment plate could be made that will allow you to fix the manufacturing problem
     
    Easter Bunny, via a mobile device, Oct 26, 2019
  6. Enki

    Enki Motorhead Platinum Member

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    Probably could, but I'd still have to measure the cams to find out how off they are, and that likely requires at least some disassembly of the engine to do (timing wheel, etc).
     
  7. VTMongoose

    VTMongoose John/MD1032 Gold Member

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    OK then simply swap the cams and leave everything else as-is right?
     
    VTMongoose, via a mobile device, Oct 26, 2019
  8. Enki

    Enki Motorhead Platinum Member

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    I'll have to pull the motor to do that, and I really want to avoid that.

    In other news I went up to Phoenix for work yesterday and wound up using 11.5 gallons for 249.2 miles, totaling 21.6 MPG highway. I was babying it a bit, but would see speeds as high as 85, and traffic/accidents on the way home fucked me over pretty good. No boosting though, and this was a 15.5 targeted lean burn tune with full timing.

    Needless to say, I am *extremely* disappointed in this result, as the higher compression and smaller displacement should have increased this number significantly (I originally estimated about 28-30 MPG on full corn). This further indicates an issue with the setup.

    Oh well.
     
  9. Enki

    Enki Motorhead Platinum Member

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    From the other place:

    upload_2019-10-26_17-4-18.png

    Attachments show comparable lean burn (16.0 instead of 15.5) and slightly more aggressive timing than what I run now.

    Since the crank rotates clockwise and I know there's a little bit of slip that happened during tightening (the plate wouldn't go back in after) I'm going to test by modifying VVT during cruise and see if my MPG and power and whatnot all improve.
     
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  10. Easter Bunny

    Easter Bunny Professional Engineer Silver Member

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    Are you running corn or gas?

    On gas that mileage would be pretty bad in my opinion but I'm at sea level I don't know how much of a difference your elevation makes in fuel economy
     
    Easter Bunny, via a mobile device, Oct 27, 2019
  11. Enki

    Enki Motorhead Platinum Member

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    Full corn, and the altitude of the trip ranges from 3,000 to 500 ASL and back.
     
  12. Easter Bunny

    Easter Bunny Professional Engineer Silver Member

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    Its kinda right where I would expect
     
    Easter Bunny, via a mobile device, Oct 27, 2019
  13. Enki

    Enki Motorhead Platinum Member

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    ...Which is exactly why it's a problem.
     
  14. Enki

    Enki Motorhead Platinum Member

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    New map, 1 degree more timing, no vvt and less boost but more flow (could be temp related; 30 degrees boost temp delta).

    no vvt.jpg

    Overall, the curves (AFR, boost, etc) look a lot smoother than the last set so I think I'll just live with the ~700 RPM spool loss.
     
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  15. Enki

    Enki Motorhead Platinum Member

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    Been a while. Went back to e30 to prove tune issues out, was vindicated. Got about a dozen pulls on the same tune with a 2.0 load target and getting the finger from the tune in most situations.

    I've updated the tune for e30 (2.15 load target, revised WGDC base, pulled a couple degrees timing up top due to knock, etc) and I'll see where that gets me. Currently 1.1 seconds slower than my fastest 60-100 on the old engine/setup but in third gear (5.662 seconds). New tune should make a bit more torque, or blow up. I'm good either way.

    bleh.jpg
     

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  16. Everton992000

    Everton992000 Greenie Member

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    I've been following this thread for so long I forgot what your original goal was for this setup. Was it for road course racing?

    Sent from my GM1917 using Tapatalk
     
    Everton992000, via a mobile device, Jan 12, 2020
  17. Enki

    Enki Motorhead Platinum Member

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    Yep. I'm still confident the cams aren't good, because, well, I never got what I asked for in the first place.
     
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  18. Enki

    Enki Motorhead Platinum Member

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    Story time with uncle Enki. Aaron can sit on my lap and get his mullet pulled, the rest of you can gather around.

    Our story starts at the gas pump. Ran into a BMW owner that wasn't a dick filling up on his way to work; E33 manual mix. Talked a bit, he left (no I didn't get his number). Went to do a 3/9 mix; got the 3 in, but could only squeeze 7.5 of 91 in. Oops. Went to the local car eatery with the bros for shit talk and chicken tenders, started doing math. Turns out 3/9 isn't what I should be running anyways, and 3/7.5 is better than what I was running. +1 oops, -1 oops. For anyone that cares, I had been beating the shit out of it so only 17 MPG ish (though it wasn't topped off last fill up so that should be higher).

    So, moving to a 4/8 mix from here on out, and will be trying to finish the tune.

    This map I've been beating up on, however, had some changes. I pulled some timing to see if the up top knock would go away (it didnt), and redid the boost curve to throw more air at it (it's still the same map as in the prior VDyno though). Since fueling up tonight, it's been a whole different animal up top. It's leaned back out to 11.5s (still dialing 11.75 but 11.5 is better than 10.8), and I'm making obvious, felt power all the way to red:

    WOT 3rd 1-18.jpg


    Tonight, I hit 4.27v (currently registering as 400g/s flow, but that's wrong as I need a new MAFCAL) which is slightly higher than the voltage my stock engine hit 400 WHP at (on basically an identical intake / MAF housing)...Essentially, I'm down 33% on power per airflow and I'm not 100% sure why; cams and piston design are likely culprits, as is crankcase evac since I'm still stock PCV setup there, sorta. Pistons can be proven with aux but that takes money I'm not prepared to spend.

    There's also still the tuning issues which are making things painful to dial in load wise; still working with Steve on that though.

    60-100 is still in the 6 second range, which is balls for a 3rd gear pull, but I also need to do a pull in my usual spot to get a more accurate vdyno log.
     

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  19. Easter Bunny

    Easter Bunny Professional Engineer Silver Member

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    I feel like you have to suck it up and address the cam timing to really utilize the motor. Unless you have decided not to get into it and maximize the power with the way it is.
     
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  20. Enki

    Enki Motorhead Platinum Member

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    Swapping cams means pulling the motor again; really don't want to do that. Also, if I pull the motor, there are other things that will need to be fixed.

    I've also had another thought; the knock up top might have come down because when I did the pulls last night, I was low on oil (again); this would mean that crankcase evac is a higher priority on the list of shit to do (it's also probably the easiest, too, so there's that).
     
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