Sho's 2007 ms3 build

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

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  1. Sho

    Sho Platinum Member

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    Before, with the full 3" cold side, stock TB and stock ported mani, city driving sucked. I'm assuming the turbulence from going down from 3" to 2.5",then into a restrictive opening in the manifold and a restrictive manifold made it a chore to drive in traffic (I looked like a noob driving manual with the car lunging and jerking) and the car didn't like being below 2500rpm.

    Haven't driven in traffic yet with the CS TB, but with no other changes; low rpm is much smoother and responsive. Smoothness between shifts is good and Rev matching on downshift doesn't take as big a blip on the throttle as it used to.

    The only issues I really have from the initial experience is rpm hanging at 1500+ when going out of gear to a stop (which really doesn't bother me), And engine braking...as soon as the throttle closes the car jerks pretty bad (but only once).

    As discussed previously, it could be I need to tinker with the springs in my BOV, it could be a tuning adjustment needs made in the dfco tables if I decide to ditch Cobb and go VT, it could be because I'm on a super restricted manifold, or it's just something I have to deal with because of full 3" piping. We shall see

    Regarding driving with a 6 puck, I have one in both my speed and my mz3(lol). Other than the throttle response being total garbage in the mz3 (meaning it takes more throttle input on the pedal itself for the revs to go up), I don't really change the way I drive. It's been so long since I've driven on a normal clutch Idk what that experience is like anymore lol
     
    Last edited: Jan 15, 2018
    Sho, via a mobile device, Jan 15, 2018
  2. davychronic

    davychronic Greenie Member

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    If you have the tial q, do you know what lb spring or color you are running? I remember when i bought mine with the 11 psi spring that is tan or yellow and didnt come with other spring rates like my wastegate did. I got the 11 psi because it corresponded to my engine idle vacuum. Maybe if this tb raises or lowers your vacuum you very vell may need a different spring.

    Here ya go

    [​IMG]
     
    davychronic, via a mobile device, Jan 15, 2018
  3. Sho

    Sho Platinum Member

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    No idea what spring is in it now. I'll have to check and see if I still have the other springs or if I need to order them. I also need to find a mechanical boost gauge or something, my map sensors largest minimum value that displays on the AP is -8.98psi, but I know it's pulling more vacuum than that.
     
    Sho, via a mobile device, Jan 15, 2018
  4. davychronic

    davychronic Greenie Member

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    Jus go to your local autoparts store and pick you up a vacuum gauge for 10 bucks. Helps a ton when dialing in your map scalars. Although if you are on a 4 bar then i feel your pain, you wont be reading right in vacuum. Thats why i dropped down to a 3.5bar
     
    davychronic, via a mobile device, Jan 15, 2018
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  5. Realgib3

    Realgib3 Greenie Member

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    It works, I did it on my car and a couple other 75mm TB cars with success, via Mazda Edit. Beyond me why Cobb never release the tables, but hey, they kept a ton unreleased, so it is what it is.

    The BOV thing is a moot point on this too. The issue is fuel cutting before you're even into vacuum. I ran through about 100 logs on multiple cars to get it all right back in the day. The good news is, you can learn to drive around it most of the time and the benefits of having the bigger TB are fantastic at this level, so still worth it.
     
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  6. alexwlwsn

    alexwlwsn Silver Member

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    I ran an 11# spring + a couple large Home Depot washers in my Q.
     
  7. Sho

    Sho Platinum Member

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    Found a single runner jmf that's powder coated black and has never been installed. I'll be making a trip to Pittsburgh next month to pick it up since I know the guy. Looking forward to swapping everything over and getting this show on the road!
     
    Sho, via a mobile device, Jan 16, 2018
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  8. Sho

    Sho Platinum Member

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    So, took the car out for a spin Saturday. Wasn't warm enough to hook 4th gear, but I got a log. My maf is scaled quite a bit for aux fuel, so I can't give you a g/s increase from the CS TB itself, but you can see how lean I went in the 4-5krpm range.

    Tune will Def need adjustment once I get the jmf on Capture+_2018-01-22-17-01-32-1.png
     
    Sho, via a mobile device, Jan 22, 2018
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  9. davychronic

    davychronic Greenie Member

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    Wow you are at the top of your maf, 3.5”?
     
    davychronic, via a mobile device, Jan 22, 2018
  10. Sho

    Sho Platinum Member

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    Yep, 3.5" HTP
     
    Sho, via a mobile device, Jan 23, 2018
  11. Realgib3

    Realgib3 Greenie Member

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    Yeah he needs big boy intake pretty bad.
     
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  12. davychronic

    davychronic Greenie Member

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    Shiiiit, I had to go back and look at my old logs to see how close i got and i was at 4.5v at 30psi. We are both going to need some whale penis in our lives. I wish jbr made a 4" maf housing so i could make my own intake...
     
  13. Sho

    Sho Platinum Member

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    Might have you make me one if you're up for it! Lol
     
    Sho, via a mobile device, Jan 23, 2018
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  14. Sho

    Sho Platinum Member

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    Took the speed out today on my way to get my jmf.

    0218181437a.jpg 0218181444.jpg

    It was 41° outside, but I figured I'd try logging again with the CS TB on the stock manifold. 0218181532a.jpg

    Its not hitting boost targets down low due to IAT being below 68°. But you can see how much air this thing is flowing in the mid range where it goes lean to ~13.4 AFR and how high my maf voltage is up top. Time for a 4" intake !

    CS TB LOG IMAGE.jpg


    Surprisingly hooked 2-18-18 vehicle speed.jpg

    An obligatory vdyno. It's low on power obviously since it's not hitting all boost targets til way up top 2-18-18 4th gear.jpg
     
    Sho, via a mobile device, Feb 18, 2018
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  15. davychronic

    davychronic Greenie Member

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    Whats your wastegate spring pressure?
     
    davychronic, via a mobile device, Feb 18, 2018
  16. Sho

    Sho Platinum Member

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    Theres a 9psi spring in it now. Might up it to 14.5 this go round
     
    Sho, via a mobile device, Feb 18, 2018
  17. davychronic

    davychronic Greenie Member

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    Wow i guess you kind of need that for the lower gears. No plans to go port inj huh, the mani looks really nice. Cant wait to see what your tuner can do with the tb now.
     
    davychronic, via a mobile device, Feb 18, 2018
  18. Bigelow

    Bigelow Silver Member

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    is that the 75mm inlet on the jmf? if not while it's off the car find someone to make it or else that will become your next restriction. just a thought
     
    Bigelow, via a Samsung mobile device, Feb 19, 2018
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  19. Bigelow

    Bigelow Silver Member

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    sent jmf an email yesterday as im in the same spot with mine.they said the run the same size piping on a 60mm and a 75mm only difference being the flange. they can send you it for 70 or so shipped or can most likey bore is to a 72/75mm
     
    Bigelow, via a Samsung mobile device, Mar 2, 2018
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  20. anthony

    anthony Greenie Member

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    what ring gap did you use?
     
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