LX 570 Harrop Supercharger Stage 1 and 2 Impressions (1 Viewer)
- Thread starter boringdriver
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Dunbar
SILVER Star
Pints at a local craft house? Or at Prospeed on Cutten road.
Is there a requirement for premium fuel with the supercharger?
Also, did you go stage 1 or stage 2?
Also curious about your mileage?
Understood that the LC200 is not a Prius but I like the 19mpg I'm getting now and wouldn't want to lose 20%.
Also, did you go stage 1 or stage 2?
Also curious about your mileage?
Understood that the LC200 is not a Prius but I like the 19mpg I'm getting now and wouldn't want to lose 20%.
- Thread starter
- #25
Premium is a requirement. Costco here is $2.77 for 93 octane. Gas mileage stayed the same.
- Thread starter
- #27
Oops, stage 1.
Stage 2 is less “bolt on” and requires a few more mods to make the whole thing work.
Stage 1 is what I’m ordering. It’s bonkers enough for me in a 3 ton SUV.
I saw the difference in the pic between stage 1 and 2 seem to be new injectors. I wonder what else it requires?
I'm excited to see more progress with force induction on this platform.
Anyone run one with a wideband? Would be interesting to know if there's enough fueling for the Stage 1 HP level. As a previous tuner, I suspect it may need at least a rising rate fuel pressure riser to provide enough fueling with stock injectors.
Anyone run one with a wideband? Would be interesting to know if there's enough fueling for the Stage 1 HP level. As a previous tuner, I suspect it may need at least a rising rate fuel pressure riser to provide enough fueling with stock injectors.
It doesn't mention a reg in the kit, just a pump. Seems like from the video, the Stage 1 is running just fine.
Hopefully they've done their research and this is true. From my days of tuning for forced induction, I wouldn't assume, and I have my suspicions that what's provided in the kit doesn't create enough fuel capacity to support the added airflow. Pump only goes so far. Actually, the fuel system is likely at a disadvantage with boost and the setup is relying on fuel trims to cover.
It'll probably run great and fine for the typical enthusiast that does short pulls here and there. Given the wrong variables, perhaps with load, on an extended pull up a mountain, on a cold day with max boost, and things may just go too lean and fall apart. The engine will feel great, just until it doesn't.
Short of wide-bands, perhaps the OP can monitor fuel trims. It'll be some indication, but still won't provide the whole picture with full throttle and open loop.
Sounds like this Houston meet is growing... Should we do the Texas thing and select a Buc-ees somewhere (IYKYK)...
- Thread starter
- #36
This stage 1 kit includes an upgraded DeatchWerks 340LPH fuel pump to be installed, as well as a jig to modify the factory fuel pressure regulator to increase fuel pressure.
I have confirmed that a tune is available for the 2015 LX 570 via HP Tuners. This is technically unofficial, as HP Tuners does not list ANY Lexus vehicles in their support list. The vehicle does register ok and shows a tune is support when plugged in. Confirmed with several tuners.
I ordered an HP Tuners MPVI2+ (latest model) so that I can take plenty of logs to see just how well this Stage 1 setup is. In the future, I will be upgrading a few components. I have ordered the American Racing Headers 1-3/4" x 3" Long Tube Headers w/ High Flow Cats. I will be upgrading my fuel injectors with either DW 650cc injectors or 750cc Bosch injectors from Prospeed. The DW 340lph included with the stage 1 kit will likely need to be upgraded to a 450lph unit. The modified fuel pressure regulator will need to be swapped back for an unmodifed unit; luckily these run pretty cheap at $49 online. Contemplating getting an AFE intake or perhaps a Magnuson air box lid. Not sure. This will require a tune of course!
bloc
SILVER Star
Not to mention optimizing timing for FI, in a way other than waiting for it to knock and adjust spark trims by itself. But OP seems to be headed down a good path with HPTuners.
I’m very interested in HPTuners implementation on the 200 platform.. would really appreciate any tech posts you can put together on this.
Also are you familiar with Toyota’s method of fuel flow management via stepping down the pump voltage at lower required flow rates? They have done this a couple different ways over decades of stock vehicles, much longer than most manufacturers which started doing it more recently.
Figuring this out may be necessary with such a high flow pump and a stock-ish regulator.
Name a place and I'll try and make it. I am south of Houston but game to come up, there's always an errand that needs running in the city.
Good stuff! That's the nugget that I was looking for that they did have modifications to the regulator.
Dunbar
SILVER Star
From what I see it is neutral to your current driving habits. If you have a heavy foot, you will drink more than normal. If you use cruise control you will get better mileage. I vote for heavy foot.
