LX 570 Harrop Supercharger Stage 1 and 2 Impressions
- Thread starter boringdriver
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bloc
SILVER Star
- Thread starter
- #83
Thanks, updated
You show a 1 second improvement in 0-60 and that carried through the 1/4 mile. I would think there is a bit of meat left on the table. Is it banging the limiter at the top of 2nd? Look at Viktor G YouTube channel. He explains some stuff about HP tuners in Tundras with the same power train. I think you could be into mid 12’s with a little more work on that tune.
- Thread starter
- #85
You’re right, there are improvements that can be made with the shifts, particular the 1-2 shift, very slow.
The HP tuners forum has some helpful info too. Toyota Repository - https://forum.hptuners.com/showthread.php?81934-Toyota-Repository. I have no first hand experience with HP Tuners but there are some out there who really know their stuff. The WHP gains you show are very impressive. I look forward to seeing you in the 12’s real soon.
Increasing the tube size is a viable strategy to increase metering bandwidth. Make sure it's scaled in the tune. Otherwise it's a hack that can backfire as it causes the ECU to believe there's less air. Causing things to potentially run leaner with more timing.
Jason Andrews
Modaholic
looking at other dyno #’s of loss of power thru drivetrain that’s ~630hp at the crank. Does that seem about right? Either way pretty impressive.
Last spoke to prospeed in Houston a month or two ago and the answer was no. And they reiterated “no tune needed”.
They did say that they might “take a crack at it” or something salesy sounding that didnt win me over.
They are reputable though from what I know.
bloc
SILVER Star
I vaguely remember there may be a substantive difference between 16/17 and 18+ with regard to encryption and tuning ability. A few other things changed in 18 so a software/firmware change as well is plausible.
Also note that HPTuners says some Toyotas work when same year Lexus doesn’t.. (2013 specifically) which may point to things not working for a late model LX (Mal) but a cruiser being an option (maybe).
Personally I’d get on the phone with different shops to explain what you are looking for and see what they say. Tuners are constantly evolving their craft and what wasn’t an option last week could turn into one today.
The idea is trying to make these flexy school busses fast is wild to me.
Its called stuntin son. Lol.
Im just trying to replicate a G63 though at the end of the day. And those don’t drive nearly as comfortably as the LX. Im holding off until a tune is out for me, and even then i may just not.
But the idea of having it all without too much worry is more possible here than anywhere else IMO. And im comforted by the fact even T did it at one point.
There is an escalade V out now too. I would be lying if i wasn’t drooling at those. Its
though.It is all wild at the end of the day like you said.
One day I'm gonna get someone to make a huge NA engine and drop it in a 200 series. I like having options on the road. Being stuck on a country two lane behind a train of cars gets old
Jason Andrews
Modaholic
Agreed. My wife sold her GX470 and has a AMG GLE63S. It’s crazy fast! Trying to match that seems insane. Maybe a stage 2 and re-gear will get it there.Its called stuntin son. Lol.
Im just trying to replicate a G63 though at the end of the day. And those don’t drive nearly as comfortably as the LX. Im holding off until a tune is out for me, and even then i may just not.
But the idea of having it all without too much worry is more possible here than anywhere else IMO. And im comforted by the fact even T did it at one point.
There is an escalade V out now too. I would be lying if i wasn’t drooling at those. Its
It is all wild at the end of the day like you said.
I took my ‘18 to a local Denver shop to try to pull a file and it was no-go. They said they actually work with Prospeed and have a car they send back and forth and work on/race together.
I may end up having a shop weld in a bung into the exhaust and put a sensor in it and throw it on a dyno to make sure it’s staying in a safe A/F ratio. Of course testing at 5,280 and then me regularly driving at 10,000ft+ and towing 8k# is another story. Nothing is ever 100% without a tune, but it’s insurance and life is short. No ragrets
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Great to know. This is an LC right?
Thats what prospeed was telling me, they may be able to read it. Glad i didnt get too excited.
bloc
SILVER Star
I'd run EGT as well personally.
Since timing is another critical part of tuning for forced induction, and any maps the stock ECU tries to adhere to will be based on NA spark tables, you're already at a disadvantage even if the fuel can sort itself out.
But I'd also not run a SC when a real tuning option isn't available. Call me conservative. Then again that's also why I drive a J-series.
Moby
GOLD Star
Harrop has a good description of their approach to tuning in the tech guide on their site. The fueling approach seems very robust. Timing is another issue. They tested with 98 RON which I believe is ~93 Octane. I can't get 93 regularly.
I agree with bloc. There's simply no way I'd ever run forced induction without a proper tune. I could care less what Harrop says, they've got a direct conflict of interest. The stock ECU has no idea you're jamming down a whole bunch more air and it simply can't compensate properly on the fuel/timing maps. It might be able to compensate on the fueling using the MAF, but that'll hit its upper limits and then the ECU won't know how much more fuel to add from there.
Even on my cars that have factory forced induction, once I've changed something major, like going to larger turbos, they needed a completely new tune. To take an engine that's NA, add forced induction and not add a tune to make it run properly is just insanity.
Even on my cars that have factory forced induction, once I've changed something major, like going to larger turbos, they needed a completely new tune. To take an engine that's NA, add forced induction and not add a tune to make it run properly is just insanity.
bloc
SILVER Star
Agreed. And even if it doesn't run up against MAF limitations it will not use A/F ratios appropriate for boost because without a tune it doesn't know it needs to. This is also my issue with their strategy for spark tune.
What harrop does is not a tune.. it's a band-aid.
