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GS 450h Performance increase!!!! Help Help!!!

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Old Feb 21, 2012 | 11:47 PM
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Exclamation GS 450h Performance increase!!!! Help Help!!!

Hi All,
I need your help!!!!! I have a GS 450h, 2009... I have been looking for performance products for it, GO FASTER BITS and I have not had any luck Can someone please help me out???

Thanks a ton!
Simon
slourensz@yahoo.com

Last edited by Simonl; Feb 21, 2012 at 11:50 PM. Reason: just to add more infomation
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Old Feb 22, 2012 | 05:57 AM
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Hey, welcome.

First off, don't bother thinking you can mod this thing much more than bolt-ons to the engine.
I've gone into as far as contacting Aisin, in regards to the hybrid drive.

Intake, exhaust, brakes, suspension is about it. The ECUs are locked down, and even a throttle controller wont work.

Know this. You are not really driving your car. When you hit the gas. You are basically putting a algorithm into the computer and then the car reacts. Put your car in neutral and punch it. The motor might kick on to charge the battery. Might not. But its not going to rev, you don't even know what redline is on that car

This is pretty much what you're dealing with.
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Old Feb 22, 2012 | 06:51 AM
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Hey,
Thank you.... Ok, then what can I do to the engine? Can you let me know the manufactures of parts?
Thank you ...
Simon
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Old Feb 22, 2012 | 07:12 AM
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Look at the 3GS DYI sticky. top of the main 3rd gen page.

There is also a search feature (Big Red Button) at the top of the page.
As far as what you can and cant do... you'll just have to read here.
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Old Feb 22, 2012 | 09:44 AM
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Originally Posted by Simonl
Hi All,
I need your help!!!!! I have a GS 450h, 2009... I have been looking for performance products for it, GO FASTER BITS and I have not had any luck Can someone please help me out???

Thanks a ton!
Simon
slourensz@yahoo.com
1st of all, you bought the wrong car if you are looking for performance. But if it is what you want, swap in the LS9 V8 from the Corvette ZR1, remove factory supercharger and bolt on twin turbos for 1200 hp.

Call Hennessey Performance, they can do that swap into any car

http://www.hennesseyperformance.com/

Other then that, your other option is trade in your 450h for a new M5 or E63 then reflash the ECU. Instant 600+ hp.

Last edited by BNR34; Feb 22, 2012 at 09:49 AM.
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Old Feb 22, 2012 | 09:48 AM
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Originally Posted by neurocity
Hey, welcome.

First off, don't bother thinking you can mod this thing much more than bolt-ons to the engine.
I've gone into as far as contacting Aisin, in regards to the hybrid drive.

Intake, exhaust, brakes, suspension is about it. The ECUs are locked down, and even a throttle controller wont work.

Know this. You are not really driving your car. When you hit the gas. You are basically putting a algorithm into the computer and then the car reacts. Put your car in neutral and punch it. The motor might kick on to charge the battery. Might not. But its not going to rev, you don't even know what redline is on that car

This is pretty much what you're dealing with.
Anything is possible, rip it all out and put in whatever your heart desire
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Old Feb 22, 2012 | 10:40 AM
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Originally Posted by BNR34
1st of all, you bought the wrong car if......

Other then that, your other option is trade in your 450h for a new M5 or E63 then reflash the ECU. Instant 600+ hp.
Originally Posted by BNR34
Anything is possible, rip it all out and put in whatever your heart desire
He's a new guy. He, like MANY other GSh owners never knew what the car really was about until owning it.

Swap a LS9?
Trade it for a M5 or E63?

Attachment 432278

Last edited by neurocity; Dec 18, 2025 at 09:32 AM.
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Old Feb 22, 2012 | 10:58 AM
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^^^^^^lollllllllll
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Old Feb 22, 2012 | 06:07 PM
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APEXi has a throttle controller for the GS450h. It won't add power but it should make your car more responsive. I don't believe anyone on here has tried this yet.

https://www.clublexus.com/forums/hyb...or-gs450h.html
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Old Feb 22, 2012 | 06:53 PM
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Originally Posted by adamz28
APEXi has a throttle controller for the GS450h. It won't add power but it should make your car more responsive. I don't believe anyone on here has tried this yet.

https://www.clublexus.com/forums/hyb...or-gs450h.html
i'm getting confused about this whole throttle controller thingy. on the one hand, apexi has an application for it and they say it should work. but when blitz/tom's throttle controller came out a couple of years ago, i was told that it won't work with GSh (see post #55 & #56 in the link below):

https://www.clublexus.com/forums/clu...and-is350.html

so what makes apexi work with GS450h when blitz/tom's don't?
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Old Feb 22, 2012 | 06:57 PM
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Originally Posted by Stormforge
i'm getting confused about this whole throttle controller thingy. on the one hand, apexi has an application for it and they say it should work. but when blitz/tom's throttle controller came out a couple of years ago, i was told that it won't work with GSh (see post #55 & #56 in the link below):

https://www.clublexus.com/forums/clu...and-is350.html

so what makes apexi work with GS450h when blitz/tom's don't?
It would be great if we could get an answer on this.
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Old Feb 22, 2012 | 07:19 PM
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and to answer simonl's question, i believe tom's hyper compressor is available for the GSh. if it's not available, they wouldn't show it at all. if someone wants to buy it badly enough, tom's will build it for you. it's all about "show me the money".

https://www.clublexus.com/forums/hyb...or-gs450h.html

on the flipside, you can always add nos. if you are going full throttle, the engine will run and nos should work.
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Old Feb 22, 2012 | 07:22 PM
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Originally Posted by neurocity
I've gone into as far as contacting Aisin, in regards to the hybrid drive.
for those of you who don't know what neurocity is talking about when he says aisin, see link below:

https://www.clublexus.com/forums/hyb...nsmission.html
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Old Feb 22, 2012 | 07:39 PM
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Trust that I am still on a quest to amp the hybrid drive.

If anyone wrecks or totals or knows where a totaled hybrid drive and battery is... I would be all over it. I know there is more power in that drive line. I know that Toyota cut back on what that trans will throw down. I know that with a code re-write you could improve percentage of power on take-off. Improve throttle response.

LEXUS, you hear me!
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Old Feb 22, 2012 | 07:51 PM
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Originally Posted by neurocity
Trust that I am still on a quest to amp the hybrid drive.

If anyone wrecks or totals or knows where a totaled hybrid drive and battery is... I would be all over it. I know there is more power in that drive line. I know that Toyota cut back on what that trans will throw down. I know that with a code re-write you could improve percentage of power on take-off. Improve throttle response.

LEXUS, you hear me!
if you start modding your GSh, let me know pronto! i've been looking hi and lo for hybrid performance modifications. maybe both of us need to ante up and hire a lexus engineer to do some hybrid tuning on the side for us?
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