Last post on May 28, 2013 at 9:28 AM
You are in the Lexus GS 450h
What is this discussion about?
Lexus GS 450h, Performance Mods, Sedan
#1 of 24 Lexus GS 450h: Accessories & Modifications
by PFFlyer@Edmunds HOST
Jul 13, 2006 (3:30 pm)
Doing some aftermarket changes to your 450h? Talk about them here!
#2 of 24 Remote Starter
Jun 03, 2006 (7:47 pm)
With the new Smart Key, is there any way that a remote car starter can be installed? I like to get into a warm car and I like to have the AC run a while before I get into the black interior. Any thoughts?
#3 of 24 Unlocking the DVD player for use while in motion
Jul 18, 2006 (8:13 am)
Anyone with info regarding how to unlock the DVD player so that it can be viewed while the car is in motion (for my children, not me while driving!? I'm interested if it's a relatively simple modification.
#4 of 24 Can we improve fuel economy
Aug 01, 2006 (4:37 pm)
The key to this car’s performance is the fact that the batteries must remain fully charged to give the “pilot” the ability to mash the peddle and rocket to 60 mph (or faster). So the car is designed to keep the battery charge as full as possible to be ready for the launch. It is evident in the worse city mpg compared to highway.
Most hybrids have better city mpg because of the use of regenerative braking to charge the battery. But to really take advantage of regenerative breaking you need to let the battery drain down some until you can charge it back by slowing the car. Much of the (relatively) poor city mpg of the 450h is due to the bias toward keeping the batteries fully charged and ready for action. Another significant reason for the (relatively) poor city mpg is that the electric motors are very powerful and will drain more on the battery than say the motors used in the Pirus.
So how could we improve the gas mileage of the 450h without making any mechanical changes? Can we find a software hack out there willing to play with the program that controls this engine? If we can, I think we could make some changes that could really improve fuel economy. Here are some ideas for a potential hack out there. (I am sure people will pay you for the changes – I will!)
Idea 1: reduce the power used by the electric motors. Since you can’t disengage some of windings in the motors without a mechanical change, how do you reduce the power used by the motors? One relatively simple way is to disconnect one motor. In “economy” mode, the 450h would only use one of the electric motors to propel the car.
Idea 2: change the timing of when the combustion engine engages. If the batteries are allowed to discharge more, the combustion engine would be needed less. In economy mode the car would rely more on the electric motors and less on the combustion engine.
Idea 3: change the electronic timing in the combustion engine so that it runs on three cylinders. Actually I think this change would require some mechanical changes inside the engine but if it could be done you could improve not only city mpg but highway also.
All of these changes should be able to be turned on and off with a switch because the real reason for buying the 450h is not for fuel savings. But the average guy would love to be able to see how far he can go on a tank. I know that I hate stopping for gas so I would use the “economy” switch on my normal daily commute.
Is anyone out there capable of hacking for us?
#5 of 24 Bluetooth & Treo 650
Aug 02, 2006 (9:51 am)
I've posted earlier about the difficulty in using Bluetooth with a Treo 650 in the GS450h. I had to get a new 650, so had to go through the hassles again. I believe I now know the solution.
The Treo sees the car as a headset and prompts for input of the security code. After entering the code, the phone thinks it is connected, but the car just waits with a message saying to "enter the security code in your phone". It doesn't recognize that the phone has connected already.
The solution appears to simply be to make a phone call while the car is still in the waiting mode (i.e. before it times out with a connection error). When you make the phone call, it must send a bluetooth signal to the car, which results in the connection being recognized. From that point on, it works fine.
#6 of 24 Low beam adjustment?
Aug 02, 2006 (9:56 am)
Speaking of modifications...
Is there any way to improve the quality of the low beam HID's? Nice and bright, but not much help given that they're practically pointed down to the road. Consumer Reports indicated this as a problem with other GS models (and numerous other vehicles as well). What's the point of bright xenon lights if they're not pointed up the road?
By the way, I've yet to notice the benefits of the lights adjusting into a curve.
#7 of 24 Re: Unlocking the DVD player for use while in motion [bmwconvert]
Oct 19, 2006 (10:23 am)
Did you ever get this question answered? I too would like to be able to view DVD's while moving.
#8 of 24 Re: Unlocking the DVD player for use while in motion [simoparv]
Oct 19, 2006 (10:26 am)
Unfortunately no. It's not unique to this car, but I haven't seen anything about doing so in any other forums or publications.
#9 of 24 Lexus Now Says Sirius Will Not Be Available
Dec 07, 2006 (6:58 pm)
I ordered (and paid for) Sirius when I purchased my vehicle back in May. Dealer said Sirius would be available by summer. Then it became "next year". Word now is that they will not make Sirius available in the GS. I settled for the XM.
While the installation was well done by the technician, I was disappointed to see that a small black antenna was glued to the top of the right rear panel, just next to the trunk, and a wire comes out from the seam at the trunk. It looks like any after market installation (albeit a professionally executed one). Hard to believe this is how Lexus planned for satellite radio in this vehicle, given that most if not all other manufacturers have a more integrated solution. Dealer told me that shark fin antennas are now used, but it wasn't available on mine. I guess a 2007 model car wasn't new enough.
#10 of 24 Re: Lexus Now Says Sirius Will Not Be Available [bmwconvert]
Dec 07, 2006 (9:43 pm)
Call the 800 Lexus number, and complain. It should have been a roof mount, or the small button antenna they now place on the front dash.