Harrop Supercharger Stage 1 - LX 570 Drivetrain Reliability ? (3 Viewers)

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I installed the Harrop on mine, its extremely easy and took 2 days. Save yourself the $3k in labor! You just need some basic tools, a friend would be helpful, and a little patience. Both Maggie and Harrop designed their SC to be as DIY friendly as possible and as far as a tune really is not needed but I highly recommend it.
The new Maggie looks like it comes with a tune. I wonder if it’ll work with the lx.
 
The new Maggie looks like it comes with a tune. I wonder if it’ll work with the lx.
Here is what they sent me:


ADKq_Na_vxCwNUqHOlQYjio-jb5VDuAr2akLuaG_CuDeYvyS2fcs9EIwYHSv6UV9kZU9IlxFtgrUrAfYdLgrZMNeonulvLQHCUqANNVxN3ylUQWZsMx21ukEeG_mlkLKvyHp8b0=s0-d-e1-ft
Kevin Woodruff (MagnusonSupercharger)
Dec 29, 2023, 09:18 EST
Brett,
Thank you for contacting Magnuson Products.
Yes, the Toyota Tundra TVS2650 Supercharger System will work on the Lexus platform with modifications to the low temp radiator bracketry. We have only released the TVS1900 Lexus Supercharger System, please reference the following product link: TVS1900 Toyota Land Cruiser/ Lexus LX570 Supercharger System - https://magnusonsuperchargers.com/collections/lexus/products/01-19-57-123-bl and you can drill down into the Instruction Manuals for comparisons under for both Supercharger Systems under the Manuals, Documents and Calibration Tabs under the Product Pages.
Kind regards,
Kevin @ Magnuson Sales Support
 
Unfortunately it won't, the maggie tune is for 08-15 LC/LX's. They use/ include HPTuners which has no desire to unlock 16+ ecus.
Which totally sucks for us '16+ owners. How totally lame! I want a bolt on supercharger system with a tune that's CARB EO certified...
 
Which totally sucks for us '16+ owners. How totally lame! I want a bolt on supercharger system with a tune that's CARB EO certified...
Brother no need to be down because that's exactly what my tuner and I have accomplished finally!

Here's my thread with info to get our 2016+ LC/LX ecu's cracked and tunable now using VFTuner.

I supercharged my truck this past June and for about 6 months I waited patiently for VFTuner to crack our ecu and release a calibration, and as of a few weeks ago it is now possible to have our models tuned and be able to run safely. In other words it don't matter whether you pick out the Maggie or Harrop s/c kit, just find a reputable VFtuner calibrator local to you or I can provide you with my tuner's info and he should be able to provide remote tuning for you.
 
Don't I have to send my ECU to Korea for it to be cracked? The tune also won't be CARB EO certified, which is an issue in a state like mine that does follow CARB rules. That's why I want the kit to come with it from Magnusson
 
Don't I have to send my ECU to Korea for it to be cracked? The tune also won't be CARB EO certified, which is an issue in a state like mine that does follow CARB rules. That's why I want the kit to come with it from Magnusson
That’s why I bought a spare ECU and shipped to Korea. Not cheap.
 
That’s why I bought a spare ECU and shipped to Korea. Not cheap.
Yeah, that's just a no go for me. Either Magnusson does a tune for the 16+ or I just don't buy the kit.
 
Is the tune for all 16+, including 18-21? My understanding is that there were some changes in 18, but I could be totally wrong.

Do the Magnuson and Harrop kits both come with injectors to take advantage of the tune.
 
The tune should be available soon for ecu's with the calibration ID of "360T11" which I believe is for 2016, 2017 and 2018. Best way to check if your ecu is compatible is to use an obd scanner which will tell you which cal ID your ecu is.

As of now unfortunately yes you do have to send your ecu out, but imo at least us 2016+ guys at least have an option for tuning... its either this or to buy a full standalone which is a basket case in itself too.
 
Yeah, that's just a no go for me. Either Magnusson does a tune for the 16+ or I just don't buy the kit.
I can see this for monetary reasons, but personally I'd trust a custom tune over a "canned" tune even if it's from Magnuson. The tuner I used is who Slee trusted to tune their Harrop supecharged LX. From what I understand he leans heavily into the conservative side when tuning. I've heard from a local 3ur Tundra that his Maggie 2650 tune (at 7,000ft in Avon, CO) was running 11.4 AFR at WOT. Also heard that the Toyota rings like things richer to stay happy so having a custom tune to put ARF in the mid 10's may be considered safer. I put my trust in the tuners hands.
Huge if true. But sadly it seems the only option for 2016+ ECU is to ship to Korea for unit by unit cracking.
I have a 2018 LX and I have mine tuned locally in Denver without sending out to Matt in Korea. I have the 360T11 ecu calibration id. Tuners who use VF tuner, previously OV tuner I believe, should be able to tune the 16-18's.

Thanks for the information, I'm assuming if I bump up injectors it'll need a tune, even with the larger pulley? What is your setup?

I've been talking with Prospeed, but I'm in Denver so maybe I should reach out to Figs. I was planning on doing the install myself, need need a tuner, etc.
Yea, if you changed anything from the stock kit provided I wouldn't even drive it across town for a tune. Stock injectors, pulley, intake you are fine to drive it. I have the Harrop w/ stock 85mm pulley, the DW 340lph fuel pump that came with it, 775cc injectors, and 1 step colder (ikh22) NGK plugs. Still yet to install the smaller 77.5mm pulley. So I have all the required additional mods for stage 2 just haven't done it yet.

Did toyota japan design the SC Tundra? or was that a TRD project?

I'm not saying it can't be - or isn't - reliable.. I'm saying it will impact drivetrain reliability compared to a stock vehicle.. which seems obvious to me.
Good point, no idea. Yes, I agree. From my experience with Land Cruisers the reason people tend to upgrade isn't typically because of powertrain issues. It's just because it seems "old" and they want the newer creature comforts that a more modern vehicle offers. I guess I'm willing to take the calculated risk and higher level of maintenance.
 
Thanks for the info, who did you have tune? I'm in Denver..
 
Thanks for the info, who did you have tune? I'm in Denver..
Ben from Slee referred me to Mike, the owner of Figs Engineering. Great guy with tons of experience and knowledge.
 
I was looking through the FSM today and noticed that 16+ lists an "Air Fuel Ratio Sensor" ahead of the cats and a "Heated Oxygen Sensor" after the cats. A little web searching suggests that the "A/F Sensor" is another name for a wideband O2.

My question is - does anyone know if this A/F Sensor really is a wideband O2? The reason that I ask here is because the "self tuning" approach of the Harrop is going to be influenced by the accuracy of the stock system's ability to judge the A/F ratio, which is going to be much more accurate with a wideband. If the 16+ have a wideband O2 it makes me feel more confident in the approach.
 
I was looking through the FSM today and noticed that 16+ lists an "Air Fuel Ratio Sensor" ahead of the cats and a "Heated Oxygen Sensor" after the cats. A little web searching suggests that the "A/F Sensor" is another name for a wideband O2.

My question is - does anyone know if this A/F Sensor really is a wideband O2? The reason that I ask here is because the "self tuning" approach of the Harrop is going to be influenced by the accuracy of the stock system's ability to judge the A/F ratio, which is going to be much more accurate with a wideband. If the 16+ have a wideband O2 it makes me feel more confident in the approach.

Generally on OBDII vehicles the first oxygen sensor is considered an A/F ratio sensor, with the second oxygen sensor simply being there to check primary catalyst efficiency. The second sensors monitoring the cats is what allows our OBD system to report to emissions inspection systems that everything is working correctly. Point is, this design is nothing special.

And even if it is wideband the fuel and spark tables will only be designed to adjust within certain ranges, and it is extremely unlikely toyota planned ahead for parameters that would be appropriate for forced induction.
 
Thanks. Yup, I realize that pre and post cat O2 has been standard for many years to account for the condition of the cats, and that all fuel and spark tables have limits. It would still be interesting to understand, even with appropriately tuned fuel and spark tables, if the A/F Ratio Sensor is a wideband.
 
Thanks. Yup, I realize that pre and post cat O2 has been standard for many years to account for the condition of the cats, and that all fuel and spark tables have limits. It would still be interesting to understand, even with appropriately tuned fuel and spark tables, if the A/F Ratio Sensor is a wideband.
100% speculation here but I doubt it. These things being durable will be really high on the priority list, and that extra complexity would seem to reduce lifespan.

I actually changed mine as PM at about 190k miles, just figured they had to be getting tired and this could be impacting mileage and tuning. So far, zero change to drivability or fuel efficiency. I’m really impressed.
 

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