Guessing HP on GS460 and GS350
12-14-05 | 12:43 PM
#16
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Originally Posted by XeroK00L
. . . On the other hand, they can also drop the 4.6L in all of the LS, GS and SC at the same time to reduce production cost. Who knows.
OTOH, the SC430 may last one more year since the 2007 model year may be the last model year before it's completely redesigned.
12-14-05 | 12:43 PM
#17
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Originally Posted by AmethySC
, it's the GS, & it always have higher hp than the LS . . .
The GS usually has a 10 hp advantage over the LS.
I have a feeling though that the 2007 LS460 will have the same hp as the GS460.
12-15-05 | 03:38 PM
#19
I was watching the press release for the GS450h a few minutes ago, and I forget the guys name who was doing the presentation but he commented that the "2007 GS 450h would join the GS 430 and GS 300 next spring." So...I'm going to guess that means that we're at least not getting the new engines until the 2008 model year.
12-15-05 | 03:51 PM
#20
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GS 350 306hp, maybe 310hp with some squeezing.
GS 450h, 330hp maybe even 340hp (according to the Euro mags)
GS 460, I made the BOLD prediction some time ago, 400hp. I stick with that.
The GS 460 is still displacement wise, way behind the Germans. The E will get the new 5.5 liter V-8, thus becoming E 550 like the new S550. Crazy, since the old AMG car is a AMG 55, as in 5. 5liters. This engine makes 378 hp I think (please correct if I am wrong)
The new BMW 550 makes 360hp I believe (again, correct me if I am wrong).
Lexus is SQUARLY AIMED at the GERMANS, I just cannot see them making a new V-8 under the Germans in power, ESPECIALLY since the new V-6 is tops in class.
And mind, you we are talking about PEAK horsepower which 98% oft he people on the internet with no clue like to argue about. All these engines are AWESOME with low end torque as well as as having ADVANCED transmissions.
The GS 400 of 1998 really made a bold move with it's 300hp. The GS 430 of 2001 and 2006 didn't do that. I expect the new engine to really SIZZLE things up to 400hp.
I am not the guy to endorse having the most peak hp, but I would say to wait all this time to see a bump from 300 to 350 would be disapointing, as that is not even a 20% increase.
GS 450h, 330hp maybe even 340hp (according to the Euro mags)
GS 460, I made the BOLD prediction some time ago, 400hp. I stick with that.
The GS 460 is still displacement wise, way behind the Germans. The E will get the new 5.5 liter V-8, thus becoming E 550 like the new S550. Crazy, since the old AMG car is a AMG 55, as in 5. 5liters. This engine makes 378 hp I think (please correct if I am wrong)
The new BMW 550 makes 360hp I believe (again, correct me if I am wrong).
Lexus is SQUARLY AIMED at the GERMANS, I just cannot see them making a new V-8 under the Germans in power, ESPECIALLY since the new V-6 is tops in class.
And mind, you we are talking about PEAK horsepower which 98% oft he people on the internet with no clue like to argue about. All these engines are AWESOME with low end torque as well as as having ADVANCED transmissions.
The GS 400 of 1998 really made a bold move with it's 300hp. The GS 430 of 2001 and 2006 didn't do that. I expect the new engine to really SIZZLE things up to 400hp.
I am not the guy to endorse having the most peak hp, but I would say to wait all this time to see a bump from 300 to 350 would be disapointing, as that is not even a 20% increase.
12-15-05 | 10:51 PM
#22
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The 5.4L in the S550 makes 382 hp.
The 4.6L is not really "way" behind the Germans displacement wise.
The base Mercedes V8 is a 4.6L making 335 hp (S450 and GL450, and eventually E450 and CLS450). The 5.4L is a step up option.
The 550i uses a 4.8L, not that much bigger than a 4.6L.
So,
MB: 4.6L, 335 hp
Lexus: 4.6L, 350 hp (my prediction)
BMW: 4.8L, 360 hp
The 4.6L is not really "way" behind the Germans displacement wise.
The base Mercedes V8 is a 4.6L making 335 hp (S450 and GL450, and eventually E450 and CLS450). The 5.4L is a step up option.
The 550i uses a 4.8L, not that much bigger than a 4.6L.
So,
MB: 4.6L, 335 hp
Lexus: 4.6L, 350 hp (my prediction)
BMW: 4.8L, 360 hp
12-16-05 | 12:21 AM
#23
to me the gs350 will be 300hp, the gs450h wil lbe about 340hp (rating), and the gs460 will be about 360 to 370hp
400hp? leave that to the 500 engine
400hp? leave that to the 500 engine
Last edited by rominl; 12-16-05 at 01:01 AM.
12-16-05 | 12:44 AM
#24
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Originally Posted by rominl
to me the gs350 will be 330hp,
Chu...
12-16-05 | 01:01 AM
#25
Originally Posted by ChuH
I think 330HP is too much. Based on Japan Lexus website the IS350 produces 318PS and the GS350 produces 315PS. Using a simple conversion I estimate the Japan IS350's 318PS as 306HP (US) and Japan GS350's 315PS as 303HP (US).
Chu...
Chu...
12-16-05 | 08:57 PM
#27
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From: Canada
Originally Posted by TwiBlueG35
I don't want to do the calculations.......let me just guess:
01-08-06 | 10:07 PM
#28
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From: The Bay Area, CA, USA
Originally Posted by XeroK00L
HP per cylinder?? 
Sorry but that ratio really doesn't mean much if anything at all.
Here's my calculation for the GS460's horsepower (no need to guess GS350's since it's officially published on lexus.jp already albeit in the unit of ps):
ASSUMPTIONS
1. The 4.6L engine will be based on the same UZ engine block used in the current SC430.
2. The 4.6L engine will have the direct fuel injection technology.
3. The 4.6L engine will have the Dual VVT-i technology.
4. Horsepower output is linearly proportional to engine displacement given the same set of engine technologies.
5. The effect of horsepower increase from each contributing technology is linear.
6. The new SAE ratings are more accurate than the old SAE ratings and should be the choice of calculation bases.
7. The horsepower contribution from the Dual VVT-i technology has to be calculated based on engines of two different families but with otherwise similar technologies. (Not a good assumption but so far the Dual VVT-i technology has been applied to the new GR-series engine only and we simply do not have a GR-series engine with the traditional VVT-i technology for direct comparison.)
FACTS
1. The current SC430 is rated at 288hp.
2. The current Avalon without the direct fuel injection technology is rated at 268hp.
3. The current IS250 with the direct fuel injection technology is rated at 204hp.
4. The last-gen Avalon, with the same engine as the current Camry V6, is rated at 190hp.
CALCULATIONS
1. The current Avalon has an hp/L ratio of 268hp / 3.5L = 76.57 hp/L
2. The current IS250 has an hp/L ratio of 204hp / 2.5L = 81.6 hp/L
3. The last-gen Avalon has an hp/L ratio of 190hp / 3.0L = 63.33 hp/L
4. From 1. and 2., the horsepower contribution factor of the direct fuel injection technology is therefore 81.6 / 76.57 x 100% = 106.57%
5. From 1. and 3., the horsepower contribution factor of the Dual VVT-i technology is therefore 76.57 / 63.33 x 100% = 120.91%
6. The current 4.3L V8 if bored to 4.6L will have 288hp x 4.6L / 4.3L = 308.09hp
7. From 4., 5. and 6., the new GS460 will have 308.09hp x 106.57% x 120.91% =~ 397hp
Then again, the assumption #7 is a wild one and ignores the advancements in other areas of the GR engine vs the old MZ engine, so the actual horsepower contribution from the Dual VVT-i technology may be less and therefore the final output of the GS460 may be somewhat less than 397hp as well.
Sorry but that ratio really doesn't mean much if anything at all. Here's my calculation for the GS460's horsepower (no need to guess GS350's since it's officially published on lexus.jp already albeit in the unit of ps):
ASSUMPTIONS
1. The 4.6L engine will be based on the same UZ engine block used in the current SC430.
2. The 4.6L engine will have the direct fuel injection technology.
3. The 4.6L engine will have the Dual VVT-i technology.
4. Horsepower output is linearly proportional to engine displacement given the same set of engine technologies.
5. The effect of horsepower increase from each contributing technology is linear.
6. The new SAE ratings are more accurate than the old SAE ratings and should be the choice of calculation bases.
7. The horsepower contribution from the Dual VVT-i technology has to be calculated based on engines of two different families but with otherwise similar technologies. (Not a good assumption but so far the Dual VVT-i technology has been applied to the new GR-series engine only and we simply do not have a GR-series engine with the traditional VVT-i technology for direct comparison.)
FACTS
1. The current SC430 is rated at 288hp.
2. The current Avalon without the direct fuel injection technology is rated at 268hp.
3. The current IS250 with the direct fuel injection technology is rated at 204hp.
4. The last-gen Avalon, with the same engine as the current Camry V6, is rated at 190hp.
CALCULATIONS
1. The current Avalon has an hp/L ratio of 268hp / 3.5L = 76.57 hp/L
2. The current IS250 has an hp/L ratio of 204hp / 2.5L = 81.6 hp/L
3. The last-gen Avalon has an hp/L ratio of 190hp / 3.0L = 63.33 hp/L
4. From 1. and 2., the horsepower contribution factor of the direct fuel injection technology is therefore 81.6 / 76.57 x 100% = 106.57%
5. From 1. and 3., the horsepower contribution factor of the Dual VVT-i technology is therefore 76.57 / 63.33 x 100% = 120.91%
6. The current 4.3L V8 if bored to 4.6L will have 288hp x 4.6L / 4.3L = 308.09hp
7. From 4., 5. and 6., the new GS460 will have 308.09hp x 106.57% x 120.91% =~ 397hp
Then again, the assumption #7 is a wild one and ignores the advancements in other areas of the GR engine vs the old MZ engine, so the actual horsepower contribution from the Dual VVT-i technology may be less and therefore the final output of the GS460 may be somewhat less than 397hp as well.
Last edited by XeroK00L; 01-09-06 at 02:31 AM.
01-08-06 | 11:48 PM
#29
Originally Posted by XeroK00L
Now that we know by fact that the new 4.6L puts out 480hp in the LS460, there's still a slight chance that the GS460 gets tuned more aggressively and therefore produces closer to the 397hp predicted by my "pointless" calculations.
480hp would be quite a feat.