GS400/430 comparison
07-20-06, 09:06 PM
#2
98-00 GS400 used Drive-by-Throttle cable system. The cable from the pedel is directly connected to the throttle housing.
01+ GS4300 uses the Drive-by-wire system. The throttle is electronically controlled. Step on the pedal and your car will read how much pedal travel you have applied, so it tells the throttle to open up accordningly. This system lags because the time it takes for the computer to work isn't instantaneous.
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1999 Lexus GS400
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01+ GS4300 uses the Drive-by-wire system. The throttle is electronically controlled. Step on the pedal and your car will read how much pedal travel you have applied, so it tells the throttle to open up accordningly. This system lags because the time it takes for the computer to work isn't instantaneous.
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1999 Lexus GS400
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07-20-06, 10:11 PM
#5
Originally Posted by GSteg
98-00 GS400 used Drive-by-Throttle cable system. The cable from the pedel is directly connected to the throttle housing.
01+ GS4300 uses the Drive-by-wire system. The throttle is electronically controlled. Step on the pedal and your car will read how much pedal travel you have applied, so it tells the throttle to open up accordningly. This system lags because the time it takes for the computer to work isn't instantaneous.
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1999 Lexus GS400
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01+ GS4300 uses the Drive-by-wire system. The throttle is electronically controlled. Step on the pedal and your car will read how much pedal travel you have applied, so it tells the throttle to open up accordningly. This system lags because the time it takes for the computer to work isn't instantaneous.
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1999 Lexus GS400
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true that the gs430 is a full drive by wire system, but i think it has more to do with how lexus change the ecu for 01+ and how they change the throttle mapping, so making it more "weird" on the gas.
i gues what i am saying is that the computers are just as fast (you wouldn't think the vsc acts slow right?), but it's how the throttle mapping is done.
the 01-03 ls430 has pretty weak throttle too, just like the 01-05 gs430 and the 02-05 sc430. but the 04+ ls430 (same engine) with 6 speed tranny, the whole ecu was updated and the throttle was so much more responsive. same with the 06+ sc430 from what i read
07-20-06, 10:18 PM
#6
Hrm..interesting. I drove a DBW and DBTC s2k and they one with the DBW did seem a bit laggy, but not as significant.
Maybe its just the pedal feel. lol I hate how whenever I drive my mom's honda odyssey through a turn and then gas it a bit on the exit, the engine seems to not rev until a split second later
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1999 Lexus GS400
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Maybe its just the pedal feel. lol I hate how whenever I drive my mom's honda odyssey through a turn and then gas it a bit on the exit, the engine seems to not rev until a split second later
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1999 Lexus GS400
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07-20-06, 10:49 PM
#7
Originally Posted by GSteg
Hrm..interesting. I drove a DBW and DBTC s2k and they one with the DBW did seem a bit laggy, but not as significant.
Maybe its just the pedal feel. lol I hate how whenever I drive my mom's honda odyssey through a turn and then gas it a bit on the exit, the engine seems to not rev until a split second later
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1999 Lexus GS400
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Maybe its just the pedal feel. lol I hate how whenever I drive my mom's honda odyssey through a turn and then gas it a bit on the exit, the engine seems to not rev until a split second later
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1999 Lexus GS400
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it's indeed something i complain since long long time ago (back in 02) after i drove the gs430. i felt the car being very slow... compared to my gs400
but after we got our sc430 and now i am used to driving that car, once you know how to get a hold of it, it's still the same fast. just a learning curve i guess?
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07-21-06, 05:12 AM
#8
What I don't understand is why they would up the displacement from 4.0 to 4.3 to add 15 lb/ft of torque. They could have at least increased the hp by that much as well. I always thought that was pointless but I'm sure they have some highly technical explanation as to why they did it.
07-21-06, 05:49 AM
#9
I would attribute lack of horsepower increase to the poor exhaust header design of the GS430. 
The GS400 has a better exhaust header design ( still not optimum by any stretch, but better than the GS430 ) and this is why I believe the 400 and 430 have the same horsepower.
Having said that, installing the S&S headers on my GS430 made a significant difference in mid-range power and response ( certainly more noticeable than the SRT Intake and Carson Tuned exhaust ). When you see the stock GS430 exhaust headers you'll understand what I'm referring to.
The GS400 has a better exhaust header design ( still not optimum by any stretch, but better than the GS430 ) and this is why I believe the 400 and 430 have the same horsepower. Having said that, installing the S&S headers on my GS430 made a significant difference in mid-range power and response ( certainly more noticeable than the SRT Intake and Carson Tuned exhaust ). When you see the stock GS430 exhaust headers you'll understand what I'm referring to.
07-21-06, 06:25 AM
#10
Lexus Fanatic
I have driven both and own a 430 and I say it's a myth.
the GS430 is as fast or faster than the 400. it's all in the driver.
do you really think that the motor with same hp, higher displacement and more torque is slower?
the GS430 is as fast or faster than the 400. it's all in the driver.
do you really think that the motor with same hp, higher displacement and more torque is slower?
07-21-06, 09:12 AM
#12
Originally Posted by GSteg
I dont think anyone is saying the GS430 is slower. It just feels different i guess? 
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1999 Lexus GS400
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1999 Lexus GS400
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07-21-06, 04:13 PM
#14
Lexus Test Driver
Originally Posted by chuckb
I have driven both and own a 430 and I say it's a myth.
the GS430 is as fast or faster than the 400. it's all in the driver.
do you really think that the motor with same hp, higher displacement and more torque is slower?
the GS430 is as fast or faster than the 400. it's all in the driver.
do you really think that the motor with same hp, higher displacement and more torque is slower?
07-21-06, 05:07 PM
#15
Well, the GS430 gained some weight compared to the GS400. According to Motortrend.com the 2000 GS400 tips the scale at 3,697lbs while the 2004 GS430 weighs in at 3,715. Not much, but im pretty sure that it MIGHT make a SLIGHT difference. But then again... it's only 18 lbs.