0 to 60 times in IS350 FSport? I'm getting 6.3-7 secs...
11-29-14, 01:21 PM
#16
Your numbers looks too fast to be true - maybe the iPhone app is not correct?
11-29-14, 05:58 PM
#17
Pole Position
11-29-14, 08:03 PM
#19
Lexus Test Driver
lol. 3650 curb weight. Fill it with gas and put a grown man (200lbs) in it. And guess what....it's almost 4000lbs... Smh
11-30-14, 03:12 PM
#26
I am confused on why the 2 IS is faster than the 3 IS. If you do the math on both cars, trans. gears to rear gears the 3 IS is actually a very small bit better as far as the acceleration side. I know the 3 IS is a little heavier so that should put them about equal. My only thoughts are that maybe the 8 speed tranny is not as efficient as the older 6 speed. Anyone??
11-30-14, 03:17 PM
#27
Pole Position
I am confused on why the 2 IS is faster than the 3 IS. If you do the math on both cars, trans. gears to rear gears the 3 IS is actually a very small bit better as far as the acceleration side. I know the 3 IS is a little heavier so that should put them about equal. My only thoughts are that maybe the 8 speed tranny is not as efficient as the older 6 speed. Anyone??
11-30-14, 04:45 PM
#28
I am confused on why the 2 IS is faster than the 3 IS. If you do the math on both cars, trans. gears to rear gears the 3 IS is actually a very small bit better as far as the acceleration side. I know the 3 IS is a little heavier so that should put them about equal. My only thoughts are that maybe the 8 speed tranny is not as efficient as the older 6 speed. Anyone??
Yes it has been well documented that the 2IS 350 is considerably quicker than the 3IS in the 1/4 mile and especially 0-60mph
The weight isn't the main reason as the 3IS weighs only a mere 40kg more than the 2IS. From my experience behind the wheel it is apparent to me that the gearing of the 8-speed on the 3IS is just not as aggressive as the 6-speed setup of the 2IS, when doing a 0-60mph pull I feel the 3IS has to shift through too many gears before hitting 60mph and also it doesn't rev as hard & easily as the 2IS does (due to much longer diff ratio), also the old suspended pedal of the 2IS was more sensitive than the floor hinged pedal of the 3IS.
So all in all Lexus probably intentionally tuned the 3IS to be less responsive / slower than the 2IS for MPG purposes to compensate for the added weight.
Lexus pretty much took the transmission and gearing of the 5.0L ISF and dropped it into the 3IS. The issue is that the setup is good for the V8, but the V6 needs much more aggressive gearing like the 2IS had if you want good performance.
The weight isn't the main reason as the 3IS weighs only a mere 40kg more than the 2IS. From my experience behind the wheel it is apparent to me that the gearing of the 8-speed on the 3IS is just not as aggressive as the 6-speed setup of the 2IS, when doing a 0-60mph pull I feel the 3IS has to shift through too many gears before hitting 60mph and also it doesn't rev as hard & easily as the 2IS does (due to much longer diff ratio), also the old suspended pedal of the 2IS was more sensitive than the floor hinged pedal of the 3IS.
So all in all Lexus probably intentionally tuned the 3IS to be less responsive / slower than the 2IS for MPG purposes to compensate for the added weight.
Lexus pretty much took the transmission and gearing of the 5.0L ISF and dropped it into the 3IS. The issue is that the setup is good for the V8, but the V6 needs much more aggressive gearing like the 2IS had if you want good performance.
11-30-14, 04:57 PM
#29
Please look up the gear ratios for tranny and rear diff. for the 2IS and 3IS. Now do the math. It is geared as aggressively as the 2IS. I don't care if they did take it from the V8 it still is geared as well as the 2IS for acceleration so there is no good excuse.
11-30-14, 05:27 PM
#30
Driver School Candidate
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I am confused on why the 2 IS is faster than the 3 IS. If you do the math on both cars, trans. gears to rear gears the 3 IS is actually a very small bit better as far as the acceleration side. I know the 3 IS is a little heavier so that should put them about equal. My only thoughts are that maybe the 8 speed tranny is not as efficient as the older 6 speed. Anyone??