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3.4L supercharger

Discussion in '1st Gen. Tacomas (1995-2004)' started by CHMM, Sep 14, 2019.

  1. Nov 7, 2019 at 3:23 PM
    #881
    Shortman5

    Shortman5 Well-Known Member

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    CHMM [OP] and 1997tacomav6 like this.
  2. Nov 7, 2019 at 3:27 PM
    #882
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth

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    97 reg cab, v6 5sp 300hp supercharged, Methonal Injection, 600,001 plus miles, Original Owner
    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Hella H4 German Rated Headlights HID 55 watt bulbs (MUST DO) 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    That’s a 2” pulley
     
  3. Nov 7, 2019 at 3:39 PM
    #883
    BlackSportD

    BlackSportD Well-Known Member

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    Icon/TC Mid travel, TRD S/C, PNP Greddy EMU, 625cc injectors, 2.2 pulley, Hayden tranny cooler, AEM wideband, TRD boost gauge.
    Yeah the formula is weird like that. For me its to get the worth out of the turbo. Its just optimal. Twin charge makes a lot of sense:
    - lower intake temps
    - way less parasitic drag on the crank as @Shortman5 points out

    If keeping it compound, the S/C is taxing that crank hard, super heating your charge air all for nothing as the T/C will have no problem to make equivalent boost by itself, running through the intercooler, not literally tied down to your crank sucking up HP/Tq. The only thing the S/C has going for it (besides CARB) is the instant nature of the boost. I would go big on the pulley though (diameter, not boost rating). I think pulleyboys still makes a 5psi for us. I just want the instant low-end and let the turbo do all the rest. Lots of low gear PSI will just be tuned out with pulled timing and lots of fuel anyhow- at least on my pingy 5vz. 5lb pulley would make much less heat and much less air to be bypassed by the OEM bypass when the T/C kicks on.

    @1997tacomav6 yep there are a number of compound (or maybe twin charged?) Tacoma setups out there, IMO for the reason I mention- WHY THE HECK NOT?! The TRD S/C lends itself to it.

    I feel you @Shortman5 , CXracing isn't the benchmark of quality. But at the time I had dealer pricing and I was 110% SURE it was going to be a short lived kit so I pounced on getting one when it was in stock. Many years later and low'n'behold its still on their site, so I was dead wrong there. But still, just sitting there for when I get a big dose of stupid and make a perfectly working daily a mess.

    ** Edit pulley boys makes two underdrive pulleys, 5psi and 4psi. Perfect for that semi hammer drop (you all with the auto know what I'm talking about, when not WOT and the trans doesn't want to kick down and you get low gear/high boost), full boost low gear, minimal timing pulled and then the T/C spools, drop the S/C off. Just talking about this is making me want to do this project again...
     
    Last edited: Nov 7, 2019 at 3:50 PM
  4. Nov 7, 2019 at 7:18 PM
    #884
    Shortman5

    Shortman5 Well-Known Member

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    What’s your reasoning behind being able to bypass the S/C? IMO it would just be making it overly complicated for no reason.
    EDIT: never mind. I actually read your response instead of glazing over.


    I really want to do this as well. But funds don’t allow at the moment.

    *I still need to add a traction bar to beef up the rear
    *factory height in rear and .5” lower up front.
    *get smaller tires. Hopefully saving 15-18lbs on each tire/wheel will help get
    some power back.
    *JBA Headers/Better exhaust hopefully freeing up back pressure and dropping boost. Then adding a 2.1.


    I’ve also been wondering how much gain you’d get by tapping the manifold after the rotors and spraying water/meth. I’ve been told it’s more efficient at bringing down temps that way

    EDIT: I’m also curious what makes heat and a Roots Supercharger inefficient. The PSI or the speed the rotors are spinning?
     
  5. Nov 7, 2019 at 7:22 PM
    #885
    Dalandser

    Dalandser ¡Me Gustan Las Taco-mas!

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    The unit heats up and can’t send cool dense air into the engine. But maybe you’re asking why it heats up - it’s rpm dependent so added friction.
     
  6. Nov 7, 2019 at 7:50 PM
    #886
    JasonLee

    JasonLee Hello? I'm a truck.

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    it sounds like you don’t know how open/closed loop works.

    I recommend reading the two URD guides several times from the depths of your rabbit hole. Then you’ll have a better handle of how to move forward with digging your hole deeper and continuing to race minivans while holding your Starbucks.


    supercharger doesn’t know about open loop or closed loop. That’s all on the ECU.
     
    kigmob likes this.
  7. Nov 7, 2019 at 8:00 PM
    #887
    eon_blue

    eon_blue Well-Known Member

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    Yes the supercharger has no say on open/closed loop, from my understanding the ECU stays in closed loop until the a certain throttle position or RPM range is achieved. Which is why part throttle usually results in continued closed loop operation unless it's held for a certain amount of time and then the ECU transitions into open loop.
    WOT is almost instantly open loop which is why the AFR will show richer readings right away.

    I think what it sounds like we're after is getting the ECU to go into open loop more quickly during part throttle, or at least get the 7th injector/meth system/larger injectors to add fuel regardless to enrichen the AFR even in closed loop.

    But like someone else said earlier, even if you add fuel in closed loop the ECU will see it and fight to adjust it back to 14.7 or close to it. I know for a fact that is where my pinging issues still are - closed loop/part throttle boost
     
    CHMM [OP] and 1997tacomav6 like this.
  8. Nov 7, 2019 at 8:01 PM
    #888
    Shortman5

    Shortman5 Well-Known Member

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    the URD guides are fine but take some of the tuning stuff with a grain of salt. Not only did they not help me they made things worse. Not that they’re wrong but they don’t go into enough detail and omit some information that can you confused.
     
    kigmob likes this.
  9. Nov 7, 2019 at 8:12 PM
    #889
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth

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    97 reg cab, v6 5sp 300hp supercharged, Methonal Injection, 600,001 plus miles, Original Owner
    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Hella H4 German Rated Headlights HID 55 watt bulbs (MUST DO) 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    I’m well aware of that
     
  10. Nov 7, 2019 at 8:16 PM
    #890
    Shortman5

    Shortman5 Well-Known Member

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    To answer your question there’s nothing on the market that can make it switch to open loop. Split Second did something like that early on but it must have had some issues because it hasn’t been available for some time.
     
    CHMM [OP] and eon_blue like this.
  11. Nov 7, 2019 at 8:49 PM
    #891
    JasonLee

    JasonLee Hello? I'm a truck.

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    Yes there is. Standalone ECU.
     
    TMFF and BlackSportD like this.
  12. Nov 7, 2019 at 8:51 PM
    #892
    Shortman5

    Shortman5 Well-Known Member

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    I was going to mention that but more along the lines of “not road legal, cost thousands”
     
    JasonLee likes this.
  13. Nov 7, 2019 at 9:39 PM
    #893
    CHMM

    CHMM [OP] GTO

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    Sounds like we gotta keep the RPMs up enough, downshift and floor it. It’s not passenger friendly but it is my work truck. And it can be driven “normal” in closed loop.
     
    eon_blue likes this.
  14. Nov 8, 2019 at 4:03 AM
    #894
    Shortman5

    Shortman5 Well-Known Member

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    If you have to floor it and keep the RPMs up at all you can not drive normal in closed loop.

    Point is your going to have to drive around that area we’ve been talking about all this time. The area you NEED part throttle enrichment for.
     
    1997tacomav6 likes this.
  15. Nov 8, 2019 at 7:52 AM
    #895
    BlackSportD

    BlackSportD Well-Known Member

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    Icon/TC Mid travel, TRD S/C, PNP Greddy EMU, 625cc injectors, 2.2 pulley, Hayden tranny cooler, AEM wideband, TRD boost gauge.
    Yeah, I'm not known for having an economy of words haha.

    I really thought some custom arduino setup would be required, but with the EMU I think I can pull off the transitional setup without added electronics.

    Currently I use the on/off type setup now for mountain passes where just keeping up with traffic puts the truck in partial throttle boost, which in turn richens the fuel (I have the split second in conjunction with the EMU to enrichen closed loop boost) and also pulls timing- so MPGs is just crapping out the tailpipe and EGTs going up for no good reason. I have a pic somewhere from another thread where I got a custom switch that has "S/C Bypass" on it. I think only one other member has followed suit and setup the bypass on their setup too, I think so that they can run 87 octane when they want to.
     
  16. Nov 8, 2019 at 8:42 AM
    #896
    Shortman5

    Shortman5 Well-Known Member

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    I was watching some “supercharger sound” videos on YouTube last night. Now I want a V8 so I can run a ported M112.
     
    BlackSportD and cruiserguy like this.
  17. Nov 8, 2019 at 9:00 AM
    #897
    cruiserguy

    cruiserguy Well-Known Member

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    :rofl::rofl:ain't that the truth!
     
  18. Nov 8, 2019 at 11:10 AM
    #898
    mechanicjon

    mechanicjon They call me "Jonny Stubs"

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    Just a thought. The ECU adjust fuel by engine temps. What would happen if you placed a resistor to ground on the water temp connection. Eliminate the water temp sensor and trick the ecu to thinking the temps are 100 degrees.
     
  19. Nov 8, 2019 at 11:12 AM
    #899
    mechanicjon

    mechanicjon They call me "Jonny Stubs"

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    I have an URD AFR calibrator to run on mine. We'll see how that does.
     
    1997tacomav6 and CHMM [OP] like this.
  20. Nov 8, 2019 at 11:52 AM
    #900
    Shortman5

    Shortman5 Well-Known Member

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    this works quite well. But in my experience it won’t do much for ping in closed loop. For me it’s almost entirely timing related.
     
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