LC500 Modifications
Pit Crew
Joined: Oct 2022
Posts: 178
Likes: 83
From: Calif
I would have thought that since LEXUS decided to put out so many variations of the LC500, they would have a Type "R" or Type "F" available.
However, it would still be a pretty heavy sled.
However, it would still be a pretty heavy sled.
Last edited by Metal1; Mar 18, 2025 at 10:11 AM.
Pit Crew
Joined: Jun 2024
Posts: 226
Likes: 87
There we go. I think a flash + headers + catback + intake qualifies as “a lot more than a flash,” is more than ten times the price, and even with some generous marketing numbers they aren’t even claiming half of 100hp. They’re claiming half of 50hp.
I don’t want to hurt anybody’s feelings, but this is the wrong car if you’re not happy with the power out of the box. Don’t get me started with the cost/benefit of milling the engine block under an F1 engineer, or whatever. If you want to play with the sound you can spend the money to change around the intake and exhaust. I don’t judge anyone who does so any more than someone spending five figures on a body kit, or doing rims. (I’ll be honest in that I think most suspension mods are a mistake, because few people who do it really do the analysis as it’s more about “that looks good” and the car handles worse.) If it makes you enjoy your car even more, go for it. If you’re looking to make your car objectively better, I’d look elsewhere.
I don’t want to hurt anybody’s feelings, but this is the wrong car if you’re not happy with the power out of the box. Don’t get me started with the cost/benefit of milling the engine block under an F1 engineer, or whatever. If you want to play with the sound you can spend the money to change around the intake and exhaust. I don’t judge anyone who does so any more than someone spending five figures on a body kit, or doing rims. (I’ll be honest in that I think most suspension mods are a mistake, because few people who do it really do the analysis as it’s more about “that looks good” and the car handles worse.) If it makes you enjoy your car even more, go for it. If you’re looking to make your car objectively better, I’d look elsewhere.
I'm in the same camp which is where my scepticism comes from. Without some form of forced induction to play with, On the stock car, I don't see how you can boost performance (HP and torque) by simply getting into the ECU unless you're playing with fuel maps which often results in premature engine failure from running too lean or rich. I'd want to see some dyno runs. Plus, the whole process that is being described by "Tuned by Loi" implies headers and/or a supercharger is involved. So, not a simple ECU flash. From their Facebook page:
2021 Lexus LC500 in for a full E85 dyno pro-tune. Lexus LC500 coupe years 2018-2021 have full engine and transmission tuning support. Complete Remote E-Tune Kits are available for purchase. Please email to secure your kit. Very limited quantities are available.
Modifications:
PPE headers
Novel catback exhaust
blitz_japan_official intake system
Stock Tune Baseline: 391whp / 355ftlb tq 4TH gear. 91ACN + 23% ethanol content
Tuned by Loi Stage2: 417whp / 378ftlb tq 4TH gear. 91ACN + 23% ethanol content
Tuned by Loi Stage2 ethanol blend: 432whp / 390ftlb tq 4TH gear. 91ACN + 44% ethanol content
Tuned by Loi Stage2 ethanol FINAL: 451whp / 418ftlb tq 6TH gear. 91ACN + 44% ethanol content
So, there's a lot more going on here than just a simple ECU flash.
2021 Lexus LC500 in for a full E85 dyno pro-tune. Lexus LC500 coupe years 2018-2021 have full engine and transmission tuning support. Complete Remote E-Tune Kits are available for purchase. Please email to secure your kit. Very limited quantities are available.
Modifications:
PPE headers
Novel catback exhaust
blitz_japan_official intake system
Stock Tune Baseline: 391whp / 355ftlb tq 4TH gear. 91ACN + 23% ethanol content
Tuned by Loi Stage2: 417whp / 378ftlb tq 4TH gear. 91ACN + 23% ethanol content
Tuned by Loi Stage2 ethanol blend: 432whp / 390ftlb tq 4TH gear. 91ACN + 44% ethanol content
Tuned by Loi Stage2 ethanol FINAL: 451whp / 418ftlb tq 6TH gear. 91ACN + 44% ethanol content
So, there's a lot more going on here than just a simple ECU flash.
Pit Crew
Joined: Sep 2024
Posts: 124
Likes: 72
From: Ontario
And I come back to swapping the differential as the best bang for the buck if you're trying to improve 0-60 times but at reduced top speed. Now, if someone could truly open the ECU code and change the RPM limit in 10th gear (which I understand is the culprit in reduced top speed) then you could have the best of both worlds.
Yes?
Yes?
Pit Crew
Joined: Mar 2024
Posts: 212
Likes: 94
Yes, If you are not happy with the car and want to make it yours do it. As already stated you need to pick a different car if you want easy high output mods. YOU can lower the car, glue, stick, and screw all of the carbon fiber you can possibly fit on this car and make it yours. You can change the rear end and get to the next stop light 3 tenths of a seconds quicker. I do find myself cruising at 165 plus wishing I could go little faster. The point is do it for you not for what others think or you think they will like. All of the different people and opinions is what make this forum work. Some will never post pictures because they don't care what others think, nor do they want there opinion. Keep posting but don't get your feelings hurt when someone has an opposing opinion or viewpoint.
Last edited by kirkd1; Mar 19, 2025 at 02:50 PM.
Pit Crew
Joined: Jun 2024
Posts: 226
Likes: 87
And I come back to swapping the differential as the best bang for the buck if you're trying to improve 0-60 times but at reduced top speed. Now, if someone could truly open the ECU code and change the RPM limit in 10th gear (which I understand is the culprit in reduced top speed) then you could have the best of both worlds.
Yes?
Yes?
Pit Crew
Joined: Oct 2019
Posts: 121
Likes: 130
From: AZ
And I come back to swapping the differential as the best bang for the buck if you're trying to improve 0-60 times but at reduced top speed. Now, if someone could truly open the ECU code and change the RPM limit in 10th gear (which I understand is the culprit in reduced top speed) then you could have the best of both worlds.
Yes?
Yes?
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Who's tune are you running? Loi or Reflash.RD? was it worth the price?
Pit Crew
Joined: Oct 2019
Posts: 121
Likes: 130
From: AZ
Running oem tune but i deleted out some codes from the tune for the exhaust valves being unplugged. I just happened to have the software in 2021 before Loi and Reflash offered tunes. I paid 450 for a stage 2 tune when Loi first started but now i think his prices are 1200+ so id say not worth it if you have 91 acn fuel. At that price you’re half way there to the rear differential price and not risking your engine.
Advanced
Joined: Dec 2024
Posts: 664
Likes: 477
From: MI
Running oem tune but i deleted out some codes from the tune for the exhaust valves being unplugged. I just happened to have the software in 2021 before Loi and Reflash offered tunes. I paid 450 for a stage 2 tune when Loi first started but now i think his prices are 1200+ so id say not worth it if you have 91 acn fuel. At that price you’re half way there to the rear differential price and not risking your engine.
Lead Lap
Joined: Aug 2013
Posts: 4,867
Likes: 1,421
From: GA
Wow, there are a lot of modifications both inside and out.
And we're off to the pick-up point.Today we prepared this wonderful Lexus LC 500 car. And let's briefly run through what we are here for. We installed the kit
Wide Body extensions from the company Artisan. Japanese body kit manufacturer tuning for japanese cars. We have here
there are carbon elements. This is the front lip, carbon fiber expanders inserts on the front fenders, rear expanders, carbon splitter.
On the back of the car we have there is a carbon spoiler for convertible tops, also carbon inserts on the expanders and the rear
Wide Body extensions from the company Artisan. Japanese body kit manufacturer tuning for japanese cars. We have here
there are carbon elements. This is the front lip, carbon fiber expanders inserts on the front fenders, rear expanders, carbon splitter.
On the back of the car we have there is a carbon spoiler for convertible tops, also carbon inserts on the expanders and the rear
Well, of course, we couldn't do without interior. We completely re-upholstered the entiresalon designed by Philip Plane. Here at
We had the floor completely sewn, now it's sewed leather instead of pile
carpets and all interior elements, including seat belts.
The steering wheel has also undergone changes.
Here we made a carbon top and bottom there were enough places
gear shift paddles from
Artisan companies are also in carbon. But this,
Of course, not everything. We also sewed
The trunk is also leather.
We had the floor completely sewn, now it's sewed leather instead of pile
carpets and all interior elements, including seat belts.
The steering wheel has also undergone changes.
Here we made a carbon top and bottom there were enough places
gear shift paddles from
Artisan companies are also in carbon. But this,
Of course, not everything. We also sewed
The trunk is also leather.
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