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boost vs boost/vac gauge?

Discussion in '1st Gen. Tacomas (1995-2004)' started by 1HItaco, Oct 18, 2017.

  1. Oct 18, 2017 at 3:11 AM
    #1
    1HItaco

    1HItaco [OP] Well-Known Member

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    doing a supercharger install on my 3.4 soon and trying to decide on a boost gauge.

    definitley going with speedhut but wondering if i should do boost only gauge or boost/vac gauge?

    can anyone chime in on why a boost/vac would be better than just the boost only gauge.

    going to pull the trigger just need some input from actual users of boost gauges.
     
  2. Oct 18, 2017 at 3:20 AM
    #2
    Hilborn

    Hilborn Adventure First. Safety Second.

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    ADD W1 Oil Catch Can. AFE Magnum FORCE Stage-2 Si Cold Air Intake System. AlphaRex Black Pro-Series Headlights w/ LASFit Bulbs. Anderson Engineering Solutions Manifold Spacer. ARK Splash Guards. AVS Door Sill Protectors. BAMF Bolt-On Rock Sliders. BAMF CMC Plates. BedRug. Brute Force HC Rear Bumper. C4 Engine Skid. C4 Transmission Skid. C4 Transfer Case Skid. C4 Fuel Tank Skid. C4 Rear Diff Skid. Cooper Discoverer ST Maxx LT285/70R-17. Dirt King Ball Joint Upper Control Arms. Dirt King Lower Control Arms. Dirt King Spindle Gussets. Doug Thorley Y-Pipe. DRT Fabrication Shackle Hanger Kit. Eaton Detroit Trutrac Rear Differential. ECGS Bushing. Expedition Essentials Bedside ARB Air Compressor Mount. Garmin Overlander GPS. Genesis Gen 3 Dual Battery System w/ G Screen. HCF Delete. Husky Floor Liners. Hypertech In-Line Speedometer Calibrator (@1.038). IGGY Switch Panel. Ironman4x4 Foam Cell Pro Struts and Shocks. KPOffroad Alignment Cam Upgrade Kit. Leer 100XQ. Magnaflow Overland Series Cat-Back Exhaust w/ 10416 Muffler. Method Vex Titanium 17x8.5. Yukon 4.56 Gears. Odyssey Performance Group 34 Batteries (2). OME 886x Coil Springs. OME Carrier Bearing Spacers. OME CS047R Dakar Leaf Springs w/ D29XL. Overland Torque Tune. Pakrax Tailgate Panel. Pinch Weld Mod. Pop n' Lock. Power Stop Z36 Truck and Tow Brake Pads. rcbs204 Illumited 4x4 Switch. Rear Differential Breather Relocation. Rexing V1 Dash Cam. Scanguage 2 w/ TFT. Stahlbus Oil Drain Plug. Stoptech Cryo-Treated Rotors. Sway Bar Delete. Total Chaos Bed Stiffeners. Toyota 70mm Throttle Body. ToyTec Axle Degree Shims. URD 170° Thermostat.* URD 65 to 70mm Throttle Body Adapter. URD Exhaust Cam Gears. USA Spec IPod Interface. Voltage Booster Pro. Wheeler's Brake Lines. Wheeler's Front SuperBumps with 3/8" Spacers. Wheeler's U-Bolt Flip Kit w/ SuperBumps.
    Boost only - supercharger
    Boost/vac - turbo
     
  3. Oct 18, 2017 at 3:30 AM
    #3
    Indy

    Indy Master of all I survey.

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    Vacuum gauges are most useful as either indictators of engine wear or helping you get better mpg. The higher your vacuum, the better your mpg.

    Boost gauges, basically tell you that you're not over boosting and damaging your engine. Besides that it's just a little needle that wiggles around and distracts you because you should be looking out the windshield.

    Your mpg is going to suck with the sc, especially in the beginning. It's going to be 99% your fault with very little to do with the sc itself.


    If you go with a combo you get a little more information, if you go boost only would bet more dramatic sweeps if the needle when you're on the throttle. Just driving around you won't really be seeing any boost except when you're accelerating or otherwise feeding a lot of throttle.


    My dd is twin turbo, I don't have a gauge at all. Well it does but it reads as mpg and not vacuum directly. I considered adding a boost gauge for giggles but decided it wasn't worth it.

    My diesel turbo didn't have one but I did add one to it when I started tampering with the factory waste gate. Once the new wore off I really only glanced at it when I was pulling hard uphill tows. I monitored egt though as melted pistons make for a bad day.

    If I was towing and only had room for 1 gauge, given the choice between vac and vac/boost I'd choose an egt.

    Not towing but looking for best mpg, vacuum and skip the sc entirely.

    SC and going to be driving with a heavy foot, it doesn't really matter :laugh: mpg will suck and it will be pretty obvious if your sc stops making boost. Then it's just personal preferences if I want a needle moving around.
     
    Last edited: Oct 18, 2017

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