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General Supercharger Thread

Discussion in 'Performance and Tuning' started by snivilous, Mar 18, 2021.

  1. Mar 18, 2021 at 6:24 AM
    #1
    snivilous

    snivilous [OP] snivspeedshop.com

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    Supercharger Reference Information for the 3UR 5.7L

    This post will evolve over time and is meant to give quick and easy access for basic modifications and options.

    Basic Information: A supercharger works by spinning a pump that forces more air into the engine, more air means more fuel can be burned = more power. Unlike a turbocharger, the supercharger is directly coupled to the engine (in our case by the serpentine belt) so if the engine is spinning, there is the capability of making boost. This is why superchargers are often said to make instant power because there is no lag time due to the supercharger spinning with the engine at all times.

    Most "stock superchargers" for the 5.7 engine make around 7-9psi at sea level. At higher elevations that number is less. With larger injectors and smaller pulleys and other modifications, that number can (debatably) be reliably pushed to 10-12psi which is in the ~500whp (600+ at the crank) realm. Changing intakes, exhaust, throttle bodies, etc. can affect how well the engine flows air and make even more power at the same amount of boost as well. To keep the engine safe, the general consensus is the engine has to be run very rich, with the extra fuel being used to cool the pistons off. The 5.7 is known to have small ring gaps and high temperatures will cause the piston rings to run into each other and seize, destroying the engine. To prevent that, supercharged engines generally target in the 10-11 range for air to fuel ratio (AFR). More boost = larger injectors = happy engine. Larger injectors also mandate getting a custom tune for the truck, though this is recommended even for stock superchargers.

    Superchargers - There are four supercharger options ranging in size and performance. These are all "bolt on" applications and meant to be installed on a stock engine. All options allow for upgrades to increase their power output. There are pros and cons to each option.

    Magnuson 2650 (Released 2023) - 2.65L

    [​IMG]


    Harrop - 2.65L, twin intercooler brick

    [​IMG]


    Whipple - 2.9L

    [​IMG]

    TRD/Magnuson 1900 (same thing, different cosmetics) - 1.9L, single intercooler brick
    (CAD Model here: https://grabcad.com/library/2007-2021-tundra-magnuson-1900-supercharger-1)

    [​IMG]


    Supercharger Kit Details, Issues, Maintenance, etc.


    Magnuson 2650:


    Includes - 535cc injectors, intake with 4" MAF tube, upgraded fuel pump, spark plugs, basic tune

    Issues - Brass boost port plug on the left rear side of the unit is very tight and is easily stripped. It is recommended that it be removed and reinstalled prior to install of the whole unit to facilitate easier removal at a later time.


    Belts -

    "Stock" Gates Belt - 116.188" K081153

    Information on smaller belts: https://www.tundras.com/threads/general-supercharger-thread.85513/page-419#post-3428242

    Couplers -

    Rebuild -

    Harrop:

    Includes - All stages include 340LPH DW fuel pump, 51psi (without vacuum, 40psi with) fuel pressure regulator (https://www.tundras.com/threads/general-supercharger-thread.85513/page-423#post-3436747). Stage 1 includes 85mm modular pulley, stage 2 includes DW 650cc injectors and 80mm modular pulley, .

    Issues - Early Harrop's may have issue with the throttle body extension harness, resulting in a CEL regarding throttle body voltage. Harrop will supply a new harness if notified.


    "Stage 1 Harrops" REQUIRE larger injectors. Stock injectors max out at 5000rpm and the engine becomes dangerously underfueled. 535cc injectors minimum are recommended, ideally 650cc or larger if additional modifications are planned.

    "Stage 1 Harrops" should be tuned. The stock tune experiences knock, delayed fuel enrichment, and other issues.

    Belts -

    "Stock" Continental Belt - 117.7" 4081177

    "Stock" Gates Belt - 117.7" K081177

    Gates HD - 117.7" K081177HD

    Couplers -

    Rebuild -

    Whipple:

    Includes - 650cc injectors, 340LPH DW Fuel Pump, modular pulley


    Issues - TBD


    Belts -

    "Stock" Gates Micro V Belt -120" K081196

    Gates HD - 120” K081196HD

    Couplers -

    Rebuild -

    TRD/Magnuson:

    Includes - 535cc injectors, intake with 4" MAF tube, upgraded fuel pump, spark plugs, basic tune

    Issues - A aftermarket tune is highly recommended. The stock Magnuson/TRD tune is known to have knock issues. The Magnuson otherwise has no inherent issues.

    Belts - Belts can stretch over time, and a smaller pulley can require a smaller belt to prevent belt slip.

    "Stock" Magnuson belt - 112.6" Dayco 5081125

    Smaller belts - 112.4" both Continental 4081124/Gates K081124HD (recommended for smaller pulleys)

    Couplers - Couplers wear out over time, and will sound like sand in the intake as the coupler slaps back and forth. They require the nose cone to be removed.

    The Superchargers online coupler kit (includes o-rings) for $150, made from PEEK: https://superchargersonline.com/product/toyota-trd-magnuson-tunder-coupler-replacement-kit-updated/
    ZZP Black Replacement Coupler for $10, OEM replacement, appears to be delrin: https://zzperformance.com/products/replacement-supercharger-coupler?_pos=1&_sid=bd3e6a0af&_ss=r
    ZZP Green Replacement Coupler for $20, "oil impregnated polymer upgrade": https://zzperformance.com/products/zzp-supercharger-coupler?_pos=2&_sid=bd3e6a0af&_ss=r

    Coupler Replacement Guide: https://superchargersonline.com/202...uson-supercharger-for-the-5-7l-toyota-tundra/


    Rebuild -

    Superchargers Online does inhouse rebuilds. A basic rebuild costs $1350 and the supercharger is stripped down, cleaned, new bearings and lubrication, and inspected. If new rotors are required, they are an additional $1250.



    Basic Supporting Modifications


    These list just a couple of the common modifications to support the supercharger and are highly recommended.


    Fuel Pumps - The stock fuel pump cannot keep up with the supercharger, often even in stock supercharger form. An upgraded pump provides more fuel flow to prevent leaning out. The pump requires the gas tank to be dropped, and the new pump connection to be spliced into the stock connection inside the tank, and the new pump to be mounted to the fuel catch can inside the tank.

    Installation Instructions from Prospeed: https://cdn.shopify.com/s/files/1/0...EED_TUNDRA_FUEL_PUMP_UPGRADE.pdf?v=1602272845

    DW 340 - Does not require modifications to run

    Walbro 450Ti - $200 for the install kit, flows enough fuel for 750+ injectors, may require wiring modifications to supply enough power to the pump

    URD Fuel Pump Kits - Lots of options, includes some extras, none flow much but are more than the stock pump

    Fancy fuel pump install: https://www.tundras.com/threads/general-supercharger-thread.85513/page-181#post-3070380

    Spark Plugs

    IKH22 (stock for Magnuson)
    IKH24 (colder version of the above)
    Ruthenium HX forced induction specific plugs (other alternative used by Tacoma guys)

    Gapping:



    Fuel Injectors - The two common fuel upgrades are the fuel pump, and then injectors. With a higher flowing pump, a higher flowing injector will soon be needed to inject more fuel into the combustion chamber. A larger injector can supply more fuel, but tuning fidelity may suffer as the injector gets larger. A rule of thumb is you want 80% injector duty cycle at WOT, so there is a 20% reserve capability of the injector. Once at 100% duty cycle the injector physically cannot move more fuel and the engine will begin to lean out. Injector duty cycle information linked at bottom of this post.

    Stock Tan - 372cc

    TRD Green Injectors/Magnuson - 535cc (44% bump over stock)

    DeatschWerks 650cc (75% bump over stock, 22% bump over TRD Greens)

    Prospeed 750/725cc (95% bump over stock, 36% bump over TRD Greens)

    Five-O 750cc (95% bump over stock, 36% bump over TRD Greens)

    Prospeed 1000cc (169% bump over stock, 87% bump over TRD Greens)


    Stock (left) vs TRD (right). Some injectors have different sizes and shapes.
    [​IMG]

    Tuning - A tune can make or break a vehicle. A good tune will increase horsepower and torque and drivability, a bad tune will destroy an engine. There are multiple software options to tune the Tundra, and multiple tuning companies that can provide a tune, either remotely via email or with a dyno locally.


    HP Tuners Software - Requires purchasing 4x Credits and their MPVI device and having a laptop. $600 just to unlock the vehicle and buy the device. Allows for control of the transmission shifting, engine parameters, CEL codes, torque limits, etc. This thread has information on HPT. HPT has its own dedicated forum as well, with a thread called "Toyota Repository" that has indepth information as well.

    VF Tuner Software - Requires purchasing credits and their OBD interface and having a laptop. Allows for control of the transmission, engine, and other parameters. Perhaps more advanced than HP Tuners, albeit less information and perhaps more difficult to tune with. This thread has information on VFT. VFT has its own forum as well.

    Tuning Companies - HPT and VFT are stand alone software. Other companies use those, and other proprietary software, to create tunes so you dont have to learn and mess with anything. Prices vary wildly, but here are a few options: Prospeed, D3, DAP, YotaWerx, OTT, etc.

    Intakes - The intake has two main functions, resizing of the diameter where the MAF sensor sits, and flowing cool air into the engine. As more air flows, the tube diameter where the MAF sits will have to increase. The MAF can only measure so much air, and a larger tube will decrease the air velocity so the MAF will read lower. More air = larger diameter = happy MAF. When the tube size is changed, the tune must be adjusted accordingly.

    Stock Intake - 3.5" diameter cold air intake

    Magnuson Intake - 4.0" diameter cold air intake

    Prospeed Intake - 4.5" diameter pseudo cold air (the box is not sealed from the engine bay)

    Numerous home built intakes exist as well.

    Gauges - A wideband air fuel ratio sensor is highly recommended. The stock sensor can only read down to 11.9 AFR, which is not rich enough for a boosted engine. When the stock gauge reads 11.9 you may be at 11.8 or at 9.8 and have no way of knowing. A wideband sensor will read the full range of fueling and help with tuning and monitoring the engines health.

    Innovate PSB-1 - $320, reads both AFR and boost, has multiple display and programming options.

    Innovate Datalogging Variables for HPT: https://www.tundras.com/threads/general-supercharger-thread.85513/page-227#post-3130290

    AEM Wideband - $240 (multiple options though), reads AFR, has OBD2 pass through for datalogging

    Scan Gauge Settings: https://www.tundras.com/threads/general-supercharger-thread.85513/page-375#post-3371567

    Knock Correct Learned Value (Degrees)
    TXD: 07E021BA
    RXF: 432180000000
    RXD: 2810
    MTH: 000A0020D800
    NAME: KCLV

    Knock Feedback Value (Degrees)
    TXD: 07E021BA
    RXF: 432180000000
    RXD: 3810
    MTH: 000A0020D800
    NAME: KFV


    Pulleys

    There are many modifications that exist beyond the scope of this post. The most basic modification is to decrease the pulley size, this will make the supercharger spin faster and create more power.

    [​IMG]

    TRD/Magnuson 1900 Pulleys - The stock pulley is 2.45" and is pressed on. There are options down to 2.0" with further details in this thread, however the pulley must be removed and the new one pressed on. The stock design is NOT modular. Different options listed in this thread: https://www.tundras.com/threads/pulleys-for-magnuson-trd-supercharger.114871/


    (Aftermarket modular pulley shown below)
    [​IMG]

    Harrop - The stock pulley is 85mm, the stage 2 pulley is 80mm, Harrop also offers a 77.5mm and 75mm pulley. The pulley is modular.

    77.5mm Pulley Harrop created for the forum: https://www.harrop-usa.com/harrop-8pk-supercharger-pulley-19.8-offset-99-PLY16309-GT/p104

    [​IMG]

    Whipple - Stock pulley is 3.625" and is a modular design

    [​IMG]

    Magnuson 2650 - Stock pulley is 86mm to the outside of belt and a modular design similar to the Harrop. Aftermarket options down to 70mm.

    [​IMG]

    Magnuson 1900 Parts List from SCOL

    [​IMG]

    [​IMG]

    Spreadsheets/Helpful Posts:

    Peformance: https://docs.google.com/spreadsheets/d/1M-2ZiJxq8NnDB6I2Pviy_f-1IaWsm7EuInWyQr79LuI/edit#gid=0

    Extended Crank Issues: https://docs.google.com/spreadsheets/d/1cJw7hhV-SC4FpPol4kti4dsJp1vhWqyJ/edit#gid=1474561400


    Injector Duty cycle information: https://www.tundras.com/threads/general-supercharger-thread.85513/page-518#post-3583989
     
    Last edited: May 16, 2024
  2. Mar 18, 2021 at 7:14 AM
    #2
    Davetheplumber321

    Davetheplumber321 New Member

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    This is the install file I was sent as well I figured it was an appropriate place to put it.
     

    Attached Files:

    wicked35 likes this.
  3. Mar 18, 2021 at 7:30 AM
    #3
    Saltyhero13

    Saltyhero13 Throbbing Member

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    Fuel delete mod Cup holder upgrade
    My understanding is Stage 1 does not require a tune. Fuel quality is the only constraint on getting their numbers.

    I ordered one for my 2020, I won't have it installed until late spring/early summer. When I reached out to Harrop asking about support for the 2020s this was their reply:

    Thanks for your interest in our products. This kit as stage 1 is available for 2020 Tundra. Our stage 1 kit uses the factory calibration as we've modified parts of the fuel system to suit our supercharger. I've attached a tech article that better explains this, please review it and let me know if you have any questions.

    I've attached the file they supplied as well. Edit: I had to remove the file due to the "Commercial in Confidence" markings. If you reach out to Harrop USA they will provide you the document I wanted to share.

    Hope this helps
     
    Last edited: Mar 18, 2021
  4. Apr 8, 2021 at 10:49 AM
    #4
    Downytide

    Downytide New Member

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    A thought on that statement from Harrop, if stage 1 requires no tune, wouldn't technically Magnuson's kit work on 2020+ trucks as well? consider TVS1900 pushes less air, thus less likely to run lean?
     
  5. Apr 8, 2021 at 12:25 PM
    #5
    Saltyhero13

    Saltyhero13 Throbbing Member

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    Fuel delete mod Cup holder upgrade
    Good question since they are both TVS type blowers.
     
  6. Apr 19, 2021 at 2:13 PM
    #6
    Platinum714

    Platinum714 A--A

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    I called up a performance shop in orange, CA to see if they would install a Harrop supercharger. They stated they have done a bunch of magnuson tundras and feel comfortable doing it. They double checked to see whether the ecu for my year was available or not (2019 isn’t yet) and stated that without a tune it wasn’t appropriate for Harrop to sell it that way. It sounded like I will have to wait until the ecu is available before they would install and they would be more comfortable with their work warranty also. The CARB EO states no tune is required but would shops be willing to take that risk installing without a tune. And then if I do get a tune, then I void the CARB EO??!!!
     
  7. Apr 19, 2021 at 4:42 PM
    #7
    Saltyhero13

    Saltyhero13 Throbbing Member

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    Fuel delete mod Cup holder upgrade
    @Platinum714 If you want a blower with a tune someone posted their install and some pulls over on reddit with the Maggie installed on their 2019. The installer used OV Tune for the calibration.

    If you reach out to Harrop they'll send you their tech guide. They recommend a tune in their documentation but explain why it isn't necessary for their Stage 1 kit.

    "To summarize, Harrop recognise a tuned option would be best. Where one does not exist, Harrop opted to test the operation of the stock tune with the Supercharger and are content that the modest boost upgrade of the Stage 1 kit works within the limits of the factory tune. The parameters of the stock tune extend satisfactorily to within the increased airflow of the upgrade as is evident by timing and knock control when combined with 98RON (93 AKI) fuel, component enrichment protection, increased shift torque reduction and the absence of modification induced MIL light from increased air flow.
    Very recently, tuning has become available on some 3UR-FE ECUs so further analysis of higher output and the respective limits became possible. The results were that re-calibration of 3UR-FE Vehicles was not advantageous for the Stage 1 kit (Ø85mm pulley), as long as the Harrop Supercharger kit is Installed as supplied, completely and without further modifications."


    Maybe someone with experience like @ViktorG can explain if and why a tune is required for the base Harrop Stage 1 and how safe it is without one.
     
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  8. Apr 20, 2021 at 9:06 AM
    #8
    nobodyintexas

    nobodyintexas What?

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    Whatever this forum told me to do
    I'm getting the Stage 1 Harrop installed in the next 2 weeks.

    I'll let y'all know if I blow up.
     
  9. Apr 20, 2021 at 10:01 AM
    #9
    Saltyhero13

    Saltyhero13 Throbbing Member

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    Fuel delete mod Cup holder upgrade
    Me too. Dropping off May 1st. Should get it back by the end of the week.
     
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  10. Apr 29, 2021 at 5:28 PM
    #10
    Platinum714

    Platinum714 A--A

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    Will you guys be getting the ovtune after supercharging? Will the tune be similar between TRD and Harrop?
     
  11. Apr 29, 2021 at 5:44 PM
    #11
    Saltyhero13

    Saltyhero13 Throbbing Member

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    Fuel delete mod Cup holder upgrade
    Nope. I’ll never put any OVtune product on any of my vehicles. If the blower doesn’t run properly it goes back on the shelf until another tuner company cracks the 2020 ECU.

    As to your second question I doubt they are interchangeable tunes. I’ve not heard of people putting Maggie tune profiles on their Harrop builds. If it were possible the Harrops for 2019s would be supported; Harrop could just copy the Maggie tune
     
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  12. Apr 29, 2021 at 5:51 PM
    #12
    Platinum714

    Platinum714 A--A

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    That’s interesting to know. Have you had a bad experience with Ovtune?

    Yeah I wasn’t sure when I saw that they offered tunes for supercharger that maybe they could be used for the Harrop. Glad I asked.

    i just got my fuel pump recall completed so getting it ready for install. Pretty soon mine should be shipping soon!
     
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  13. Apr 29, 2021 at 8:00 PM
    #13
    Saltyhero13

    Saltyhero13 Throbbing Member

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    Fuel delete mod Cup holder upgrade
    Keep in mind most folks (from what we can see) seem happy with OV. Ask your installer. Unless you are tuning it yourself it is their opinion that matters.

    I didn't get that far. When I was shopping for blowers and an installer several of the shops I talked to strongly recommended against using the product.

    As to not appear like I'm talking ship about one of the beloved vendors here, there is a big OV tune development thread you can read through. If they didn't nuke all the negative comments and exchanges you'll see why I won't do business with them. Same thing over on the Taco forums. There are some folks over on reddit that have used them for their Maggie install on a 2019 Tundra, you can ask for their second opinions if you like (there are two Tundra subreddits).

    I really don't know the answer for sure. I'm have an electronics and computer background, I've cross trained into some mechanical work but by no means an expert in tuning.

    I'm not sure why Harrop doesn't support their blower with OV Tuner; Magnuson switched shortly after they cracked the 2019s (their 2018s and below use HP Tuner). So I don't know for sure if they are interchangeable or not. Performance wise the Maggie is about the same as the Stage 1 Harrop but I'm sure there are some nuanced differences besides the volume they can push. I know there was a video comparison of the two bolt on systems exploring build quality and other aspects.

    I'm stoked for you! If all goes well I'll be joining you in the S/C club by next Friday.
     
  14. Apr 29, 2021 at 8:39 PM
    #14
    AZTundra

    AZTundra No Longer a New Member

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    Almost 12k miles on my Magnuson and still brings smiles.

    20200221_175057.jpg
     
  15. Apr 30, 2021 at 4:35 AM
    #15
    nobodyintexas

    nobodyintexas What?

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    Whatever this forum told me to do
    I'm skipping the tune on my Harrop stage 1 because of the following from Harrop:


    To summarize, Harrop recognise a tuned option would be best. Where one does not exist, Harrop opted to test the operation of the stock tune with the Supercharger and are content that the modest boost upgrade of the Stage 1 kit works within the limits of the factory tune. The parameters of the stock tune extend satisfactorily to within the increased airflow of the upgrade as is evident by timing and knock control when combined with 98RON (93 AKI) fuel, component enrichment protection, increased shift torque reduction and the absence of modification induced MIL light from increased air flow.

    Very recently, tuning has become available on some 3UR-FE ECUs so further analysis of higher output and the respective limits became possible. The results were that re-calibration of 3UR-FE Vehicles was not advantageous for the Stage 1 kit (Ø85mm pulley), as long as the Harrop Supercharger kit is Installed as supplied, completely and without further modifications.

    So, in late May....I'll enjoy forced induction. That is until 2020 ECU's can be accessed by HPTuners, and then Stage 2 will find a welcome home.

    How much should I budget for rear tires? <smiling like a jackass eating bed-slats>
     
  16. May 12, 2021 at 4:28 AM
    #16
    nobodyintexas

    nobodyintexas What?

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    Whatever this forum told me to do
    just pondering here....

    from reading Harrop's whitepaper....

    can one add HP to a stage 1 Harrop by increasing the octane?

    Stage 1, on 93 octane, appears to knock less than a NA 5.7 on 87 octane

    so would 95 octane knock even less and allow more timing advance?
     
  17. May 12, 2021 at 8:38 AM
    #17
    Saltyhero13

    Saltyhero13 Throbbing Member

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    Fuel delete mod Cup holder upgrade
    I wouldn't expect a large amount of additional HP by switching to 95 from 93 but its possible the 5.7 is more responsive to the change in fuel. Im interested in hearing what the pros think.
     
  18. May 12, 2021 at 9:04 AM
    #18
    armyoffoo

    armyoffoo Member

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    The ECU won't advance the timing due to better fuel, but it will retard timing less with better fuel.
     
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  19. May 19, 2021 at 4:36 PM
    #19
    HonorNotInner

    HonorNotInner I speak the 3rd most eyetalian

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    Added money to it.
    @Saltyhero13 did you get your stage 1 installed?

    @nobodyintexas I assume you're in Tejas? What shop are you having do the install?
     
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  20. May 19, 2021 at 4:50 PM
    #20
    Saltyhero13

    Saltyhero13 Throbbing Member

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    Yep! Barring any issues I pick up this weekend!
     
  21. May 19, 2021 at 5:04 PM
    #21
    Vizsla

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  22. May 19, 2021 at 5:38 PM
    #22
    Downytide

    Downytide New Member

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    #51715
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    1,671
    Gender:
    Male
    GTA
    Vehicle:
    Lunar Rock with trail boxes
    This forum is seriously full of temptations.

    Ordering day: "oh gosh, I'll just do tires since it has decent suspension, yes, makes sense, I will not do anymore mods"
    First week: "hey intake is on sale"
    Second week: "hey, look at those cool trail boxes"
    third week: "look at those cool tie downs"
    1 month after: "hmmmmm headers...."
    2 months: "I need to re-gear, yes, to tow the trailer better, yes, I need the transmission cooler kit too"
    now: "stupid neighbor with that TRX, I can build my own Tundra version, its just widebody and 700hp right"
     
  23. May 19, 2021 at 5:39 PM
    #23
    Platinum714

    Platinum714 A--A

    Joined:
    Oct 19, 2019
    Member:
    #37577
    Messages:
    200
    Gender:
    Male
    First Name:
    Ken
    Orange County, CA
    Vehicle:
    2019 platinum 4x4 magnetic gray
    I have my Harrop appointment for early July!
     
    Saltyhero13 likes this.
  24. May 20, 2021 at 3:27 AM
    #24
    nobodyintexas

    nobodyintexas What?

    Joined:
    Jun 22, 2020
    Member:
    #48303
    Messages:
    4,524
    South of Houston
    Vehicle:
    S/C'd 2020 White 1794 Tundra
    Whatever this forum told me to do

    Harrop recommended Peitz Performance. I should be scheduling next week.
     
  25. May 20, 2021 at 3:28 AM
    #25
    nobodyintexas

    nobodyintexas What?

    Joined:
    Jun 22, 2020
    Member:
    #48303
    Messages:
    4,524
    South of Houston
    Vehicle:
    S/C'd 2020 White 1794 Tundra
    Whatever this forum told me to do
    details...we will need the gory details.
     
  26. May 20, 2021 at 12:18 PM
    #26
    OhEmmBee

    OhEmmBee Rick

    Joined:
    Aug 25, 2020
    Member:
    #51331
    Messages:
    364
    Gender:
    Male
    First Name:
    Richard
    Denver
    Vehicle:
    18' Toyota Tundra MGM Crewmax (Saibot)
    Toyota Tundra Pro Grill Lace On Steering Wheel Cover Garmin Tandem and Mini Dash Cam. Center Console Safe Compustar Remote Start with DM ESP Rear under storage VLED Front & Rear foot well LED Lights Sound Deadened Cab Toytec Boss Alumna lift at 2 inches C4 Hybrid Front Bumper with four sets of Baja Designs. AlphaRex Novas Valhalla's Skid Plates Switch Pro-9100 SPC Upper Control Arms 35" tires on RRW Agressive BMC/CMC to fit larger tires. Minor bumper and fender liner trimming.
    Following. so far I only know 2 (only one with a 2020 Tundra) people with Harrop SC and it'son my list to get one. One guy in Denver runnin4tacos has one installed on their 2020 Tundra. Should give them a call or email about one
     
  27. May 21, 2021 at 5:28 AM
    #27
    HonorNotInner

    HonorNotInner I speak the 3rd most eyetalian

    Joined:
    Mar 2, 2021
    Member:
    #59861
    Messages:
    186
    Gender:
    Male
    First Name:
    Alex
    Fort Worth
    Vehicle:
    2020 1794
    Added money to it.
    Are there any dyno numbers for a stage 1 that has no tune? Because I feel like all the ones I’ve seen people or harrop post still had HP tune. (I think) if not, one of you guys should dyno just to see where the power level is at without a tune.
     
    InsaneAuto86 likes this.
  28. May 21, 2021 at 5:35 AM
    #28
    Saltyhero13

    Saltyhero13 Throbbing Member

    Joined:
    Aug 12, 2020
    Member:
    #50704
    Messages:
    4,743
    Fuel delete mod Cup holder upgrade
    I'll post the before and after #s when I get that information. I expect the numbers will be close to the Maggie
     
    Last edited: May 21, 2021
  29. May 21, 2021 at 5:38 AM
    #29
    Jbehredt

    Jbehredt Burgeoning member

    Joined:
    Nov 30, 2019
    Member:
    #39342
    Messages:
    683
    Gender:
    Male
    First Name:
    Jason
    Westminster, CO
    Vehicle:
    2020 TRD Pro DC White
    They’re off 70th and Washington. The tundra is parked out front during business hours. I take the long way home to avoid seeing it every day. Too much temptation.
     
  30. May 21, 2021 at 5:49 AM
    #30
    armyoffoo

    armyoffoo Member

    Joined:
    Jun 4, 2018
    Member:
    #15876
    Messages:
    870
    Gender:
    Male
    First Name:
    Bryan
    Cypress, TX
    Vehicle:
    2018 Black TRD Sport CrewMax
    Supercharged with all the trimmings
    Stock with no SC: 310/377

    The 2650 gets it to 492/475 on a stock 2018, their stage 2 kit gets it up to 513/514 at 8.6psi

    Stock tune:
    https://www.youtube.com/watch?v=UBfW3qqxgjY

    HP Tuners tuned Stage 2:
    https://www.youtube.com/watch?v=Oo8d1e-1yJQ

    My Truck, 2650 with 85mm pulley, upgraded fuel system, larger intake, full exhaust, custom HP Tuners tuned
    upload_2021-5-21_7-45-46.jpg
     
    Last edited: May 21, 2021

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