Noticed the hp output was rated lower on the gs460 than the ls460 with the same motor and trans? Surprised I cant find any tuning flashes for this car,does it help much to run large open K&N cone intake filters,Gut or remove the cats, the stock exhaust looks pathetically small for a v8

 

We will know the answers when Designo goes to the dyno. Until then, nobody has any info on this.

 

Search is you're best friend on this forum, It has something to do with fuel ratio, here is the thread for it https://www.clublexus.com/forums/gs-...the-abyss.html

 

thanks for the link,i did search but didnt come up with that thread. Really wish there were some easy plug and play tuners like the sct for lexus cars

 

Maybe, maybe not. That is on the middle eastern cars.

There is a thread around here somewhere about the difference in the intake. I think there are several small changes that bring the GS down on power.

 

I'm in the same boat, so I'll sub to this thread to see if anyone updates it.

Looking into getting a GS460, but really upset about the lack of power as compared to the LS460. I'm sure its a tuning issue more than an intake issue though. Coming from a background of cars with tuneable ECU's (Subaru, EVO, etc... So mostly jap cars) it would seem that there would be some way to re-flash the ECU and retrieve the lost HP. Larger (or dual intake like the LS) is mostly a precaution rather than a reason for the higher HP of the LS. Intake volume doesnt become an issue until you're pumping some pretty generous numbers (and usually with Forced Induction).

I've been searching through the forums and google to see if anyone has anything on this, but the results are limited and normally not helpful. The A/F ratio thread is def nice and I'll be following it for sure, but there has to be an easier way. Hell, even Ford trucks you can just chip em and get some more ponies. Kinda surprised that this hasnt been researched more, the GS460 has been out for quite a few years now.

 

Yes I think Lexus has been doing some emu encryption which makes it difficult to just chip the car. From a manufacturer perspective this chipping business is just going to cause an increase in powertrain warranty costs and so they try to avoid that.

 

I didn’t see an answer what happened?
I have the no cat exhaust and a k&N air filter and can say I get horrible gas mileage. (Previous owner)
some of which I think is from my throttle body needing cleaned. But is a chip on an 08 gs460 doable?

 

Instead of a chip, its better to get it dyno tuned by someone who has knowledge in accessing lexus ecu's.

 

The ECU encryption has definitely been cracked already
Still would need to check first with your tuner whether they can tune your GS
Would love for someone to post some numbers on what power they got out of their GS460

 

The output is lower because of the GS having single intake and LS having true dual intake and dual exhaust.

 

How is the GS460 lacking power when it's clearly quicker than the LS? Also, I never understood the mentality of some people. Buy one thing only to struggle in order to transform it into something different. If you want a very fast car, buy the ISF. Don't buy sport sedan that you will be dissatisfied with and feel the need to mess with under the hood.

 

Yes the 1UR sedans can be tuned, there are a few out there. Anyone that can tune lexus can do it.

Once I get my new drivers side header installed I'm scheduling the dyno on my GS460 with PPE headers, invidia midpipe, S7 tune, 91 octane. I'm around 400bhp/400ftlbs hopefully around 330whp/wt.
I still have an intake and dual exhaust to install, and room to retune for some E85, 350whp is definitely possible.

I've never understood this ^ mentality. You can get a GS460 for 1/2 the price of an ISF and 1/4 the price of GSF. With $5k in mods I run similar numbers to stock GSFs, I have just a bit less HP than an ISF, and a bit more torque at a similar weight and the same trans. The GS460 is a great car to transform into a sleeper. Better than any other non F lexus imo.

 

That makes less of a difference (maybe few hp) than the real reason: It runs 9:1 AFR on peak load, has different headers, all to keep it from being much faster than the LS which is heavier. Intake won't really be a restriction for this power level.
When you fix those things to LS spec via tune and headers it makes same or more power than the LS (due to stock factory careful parameters vs individual tune).

 

Thats still taking something and forcing it into something else out of it that it wasn't intended for. You want a luxury car, but it to be fast, but also for it to be cheap.. If you want cheap speed, there are more practical alternatives. But my main point is people getting a car and off the bat not being satisfied with it. Like the people who bought GS300s and then realized they were slow and slowly poured money into upgrades to make it almost as fast as a 430. Which they couldve bought in the first place, and for less overall money and headache.