1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Switchable Supercharger!

Discussion in '4 Cylinder' started by drew02a, May 13, 2009.

  1. May 13, 2009 at 7:59 AM
    #1
    drew02a

    drew02a [OP] Rocking your mom's world Since 1997

    Joined:
    Jan 26, 2009
    Member:
    #13005
    Messages:
    3,179
    Gender:
    Male
    San Antonio, TX
    Vehicle:
    2006 Regular Cab 2.7L 4x4
    I've been contemplating installing a Turbo or Supercharger in my 2.7L Tacoma, but keep weighing the benefits of added power against lost fuel economy. If only there were a supercharger that could be switched on and off so I'd get good fuel economy but could ramp up the power on demand. Until today, the only switchable units I'd found were shite electric ones, but...

    It turns out that Toyota made a switchable belt one for the Previa in '94 which had the 2.4 L 2TZ-FE I4. The supercharger was controlled by the ECU and was switched on when more power was needed. It also integrated an air-to-air intercooler.

    Think I could install it in my Tacoma and just run a switch into the cab?

    If so, I'd get the best of both worlds. Daily fuel efficiency and power on Demand!
     
  2. May 13, 2009 at 8:31 AM
    #2
    drew02a

    drew02a [OP] Rocking your mom's world Since 1997

    Joined:
    Jan 26, 2009
    Member:
    #13005
    Messages:
    3,179
    Gender:
    Male
    San Antonio, TX
    Vehicle:
    2006 Regular Cab 2.7L 4x4
    Would finally be a reason to make that hood scoop functional!
     
  3. May 13, 2009 at 8:45 AM
    #3
    MacTaco

    MacTaco Mustache May

    Joined:
    Sep 17, 2008
    Member:
    #9314
    Messages:
    548
    Gender:
    Male
    Pensacola, Florida
    Vehicle:
    06 Indigo, Lifted, Flowmaster
    Skyjacker 3" Lift, 285/75/R16 Toyo M/T tires/ Eagle Alloy Wheels, Flowmaster 50 Series, Pioneer Din Head Unit, Viper Alarm/Remote Start System, Debadged, DT Headers, True Flow Intake
    There really isn't any way to make the hood scoop functional. Air rolls over the hood instead of being in a streamlined path. If you wanted a functional hood scoop, then it would have to be a scoop like the subarus have.

    But I'm not sure about a controllable S/C. Could be fun to look into.
     
  4. May 13, 2009 at 8:46 AM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,158
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    FWIW, modern Superchargers have a "Bypass" feature. It alows the engine to run normally, as if the SC wasnt there, and draws vacumme for near stock fuel eccon. The boost is applied in relation to the loss of vacumme. Also, a Modern SC doesnt add nearly the parasitic drag you may think.
     
  5. May 13, 2009 at 8:50 AM
    #5
    lsocoee

    lsocoee My hair is all natural Moderator

    Joined:
    Feb 9, 2007
    Member:
    #872
    Messages:
    10,165
    First Name:
    Hotdog
    Vehicle:
    2007 PreRunner SR5 Double Cab
    Wet Okole Underwear
    I also have a feeling that knowing you have the supercharger has a tendency to degrade fuel economy.
     
  6. May 13, 2009 at 9:01 AM
    #6
    drew02a

    drew02a [OP] Rocking your mom's world Since 1997

    Joined:
    Jan 26, 2009
    Member:
    #13005
    Messages:
    3,179
    Gender:
    Male
    San Antonio, TX
    Vehicle:
    2006 Regular Cab 2.7L 4x4
    I'm pretty sure the vacuum controlled bypass on modern superchargers simply keeps it from trying to force air into the engine at idle. As soon as you step on the throttle that think is back on again.
     
  7. May 13, 2009 at 9:19 AM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,158
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    Thats what I said in my post.....As vacumme decreases, boost is applid to the engine. Even when cruiseing, the by pass prevents boost from being fed to the engine, giveing mear stock mpg. My SC'ed 2000 Tacoma mpg only dropped .5 mpg after the SC install. For the most part, every SC I have installed, when driven normally, the mpg were not that affected. Worst has been a 1 mpg drop. BUT, once the foot is put down, and boost is applied, all bets are off.
     
  8. May 13, 2009 at 9:21 AM
    #8
    drew02a

    drew02a [OP] Rocking your mom's world Since 1997

    Joined:
    Jan 26, 2009
    Member:
    #13005
    Messages:
    3,179
    Gender:
    Male
    San Antonio, TX
    Vehicle:
    2006 Regular Cab 2.7L 4x4
    Meaning it would destroy your gas mileage in stop and go traffic?
     
  9. May 13, 2009 at 9:23 AM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,158
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    No. As long as its not under boost conditions, the engine will be just like NA. I was saying "Put foot down" as in WOT, or heavey acceleration. Stop and go driveing wont affect it, provided your not heavy on the throttle.
     
  10. May 13, 2009 at 9:26 AM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,158
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
  11. May 13, 2009 at 9:30 AM
    #11
    drew02a

    drew02a [OP] Rocking your mom's world Since 1997

    Joined:
    Jan 26, 2009
    Member:
    #13005
    Messages:
    3,179
    Gender:
    Male
    San Antonio, TX
    Vehicle:
    2006 Regular Cab 2.7L 4x4
    I think I'd still like to totally disable the Supercharger for daily driving.
     
  12. May 13, 2009 at 10:48 AM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,158
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    Well, Me and some friends were working on useing an AC clutch to allow for the disableing of the SC, but it was WAY too much of a project, and the benifits (if any) didnt justify the work.
     
  13. May 13, 2009 at 10:50 AM
    #13
    drew02a

    drew02a [OP] Rocking your mom's world Since 1997

    Joined:
    Jan 26, 2009
    Member:
    #13005
    Messages:
    3,179
    Gender:
    Male
    San Antonio, TX
    Vehicle:
    2006 Regular Cab 2.7L 4x4
    That's why using a modified Previa Supercharger is so appealing. The disable mechanism is already built in.
     
  14. May 13, 2009 at 3:13 PM
    #14
    dually

    dually Low and slow

    Joined:
    Jul 29, 2008
    Member:
    #8205
    Messages:
    3,113
    Gender:
    Male
    Interstate underpass
    Vehicle:
    05 Indigo 4wd Longbed
    Not as many as the 98..
    Its as easy as staying out of boost... Just keep a light foot.
     
  15. May 13, 2009 at 4:32 PM
    #15
    Brunes

    Brunes abides.

    Joined:
    May 31, 2008
    Member:
    #7011
    Messages:
    17,641
    Gender:
    Male
    First Name:
    Rotorhead
    DC or New Jersey - Depends on the day....
    Vehicle:
    08 Red/Graphite and Satin Black
    Inside: Tint, Wet Okole 1/2 Piped Red/Black Covers, Black Weathertech Digital Fit Mats, URD Short Throw w/ TWM Weighted Knob, USA Spec iPod adapter. Outside: 4300K Retro w/ Angel Eyes and Red Shrouds, 5000K Blazer Fog Light Retrofit, Debadge, Bed Locking Handle, Satin Black Rims Performance: TRD/Steigmeier Blower w/ 2.7 Pulley. 668 Injectors and 320 LPH AEM Fuel pump. URD UCON and 7th Injector. DTLT Headers, URD Y-Pipe, Wicked Flow Muffler. Suspension: Both: OME Shocks Front: 886X's and TC UCAs Rear: Dakars Armor: Relentless Front Bumper Relentless High Clearance Rear w/ Tire/Rotopax Swing Out Relentless Front, Mid, and TCase skids BAMF Diff Skid Recovery and Spares: Fullsize Spare Tire 2x2 gal Rotopax 1x1 gal Rotopax 1x1 gal Water Rotopax Warn 9.5XP-S Winch Hi-Lift Extreme 60" Ironman Off-Road Recovery Kit
    Yeah....I had a S/C'd V8 that got better fuel milage than my Tacoma gets right now when I behaved myself...Slow acceleration- not WOT to brakes to WOT transitions or anything crazy like that.

    It's not going to kill your gas mileage all by it self...
     
  16. May 13, 2009 at 4:42 PM
    #16
    dually

    dually Low and slow

    Joined:
    Jul 29, 2008
    Member:
    #8205
    Messages:
    3,113
    Gender:
    Male
    Interstate underpass
    Vehicle:
    05 Indigo 4wd Longbed
    Not as many as the 98..
    Boost happy kills mileage. I improved my mileage after a tune by 12mpg @ 55mph.
     
  17. Sep 1, 2009 at 7:31 PM
    #17
    TheInvisibleMan

    TheInvisibleMan TacomaWorld's Ghost

    Joined:
    Apr 27, 2009
    Member:
    #16510
    Messages:
    25
    Gender:
    Male
    CT
    Vehicle:
    96 Tacoma
    guys, the reason this can't be done are for several reasons:

    1) the IM bolt patterns are different, you need to do a full head swap
    2) you're not going to run properly without a tune, or a manual (if you're 5 speed) ecu from japan from an estima emina
    3) you're not going to have much luck sourcing that ecu
     
  18. Sep 1, 2009 at 7:37 PM
    #18
    lookylookitzadam

    lookylookitzadam Retrofit Club!

    Joined:
    Jul 16, 2009
    Member:
    #19777
    Messages:
    713
    Gender:
    Male
    First Name:
    Adam
    San Diego
    Vehicle:
    07 DC OffRoad
    If you have ever driven a boosted car, be it turbo or supercharged, you will see that it is very easy to keep it in vacuum (out of boost).

    So in effect, turning the boost on and off is controlled by your foot.
     
  19. Sep 1, 2009 at 8:00 PM
    #19
    08pretaco

    08pretaco Almost there

    Joined:
    Sep 26, 2008
    Member:
    #9502
    Messages:
    9,059
    Gender:
    Male
    First Name:
    Oliver
    az
    Vehicle:
    2014 Tundra 4x4 CM 5.7L SR5
    AFE pro dry s, Husky X-act Contour
    stupid question here: whats the difference between the pre 05 2.7 and the one now that wouldnt allow that supercharger to be used with out 05+ tacos?
     
  20. Sep 1, 2009 at 8:34 PM
    #20
    drew02a

    drew02a [OP] Rocking your mom's world Since 1997

    Joined:
    Jan 26, 2009
    Member:
    #13005
    Messages:
    3,179
    Gender:
    Male
    San Antonio, TX
    Vehicle:
    2006 Regular Cab 2.7L 4x4
    The blocks are different, but I think you could use the supercharger with either one, it would just be a matter of custom fabbing a mounting system and tunning the boost.

    I think now I'll just wait until URD releases a supercharger for the 2.7L 2TR-FE.
     
To Top