GM makes better engines than toyota. ?
09-23-09, 01:41 PM
#46
Those are not the top of the line V8's. BMW S65 makes 414hp out of 4L. MB's C63 AMG makes 452hp out of 6.2L while Toyota/Lexus is making 415hp out of 5L on ISF. All normally aspirated so no forced induction distortions. BMW is making the most specific HP while MB is clearly gone torque/displacement happy and Lexus engine is doing nothing in between.
09-23-09, 01:51 PM
#48
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Posts: n/a
Those are not the top of the line V8's. BMW S65 makes 414hp out of 4L. MB's C63 AMG makes 452hp out of 6.2L while Toyota/Lexus is making 415hp out of 5L on ISF. All normally aspirated so no forced induction distortions. BMW is making the most specific HP while MB is clearly gone torque/displacement happy and Lexus engine is doing nothing in between. And for original topic's sake, LS7 from GM is making same kind of specific HP/TQ that AMG is making. 505hp out of 7L V8. Clearly LS7 >> 5L V8 from ISF
I compared one class of engines. You help prove my point, showing how they have MORE displacement and MORE power. Lexus does more with less.
Yes the BMW M3 makes 414hp to the IS-F 416hp with less displacement, but it has 295lbs of torque to the IS-Fs 376lbs of torque. THe M3 is a higher revving motor, the IS-F don't sing as high.
Again, I am not arguing one is better than the other. I am saying traditionally Lexus does more with less displacement.
09-23-09, 03:23 PM
#54
How is Lexus doing more with less in that V8? You could make a case BMW is doing more with less since it's making most specific HP. You could make a case C63 or even LS7 is doing more - certainly not with less - b/c it's making more HP and more TQ. Lexus is just doing it halfway.
Max TQ is generally correlated to the displacement so it's no surprise LS7 with 7L makes most TQ and BMW make the least with 4L while MB #2 and Lexus #3 which lines up exactly. Yet in HP it's 414 BMW, 415 ISF, 451 MB, and 505 LS7. Among those 4, ISF is clearly bring up the rear.
You help prove my point, showing how they have MORE displacement and MORE power. Lexus does more with less.
Yes the BMW M3 makes 414hp to the IS-F 416hp with less displacement, but it has 295lbs of torque to the IS-Fs 376lbs of torque. THe M3 is a higher revving motor, the IS-F don't sing as high.
Again, I am not arguing one is better than the other. I am saying traditionally Lexus does more with less displacement.
Max TQ is generally correlated to the displacement so it's no surprise LS7 with 7L makes most TQ and BMW make the least with 4L while MB #2 and Lexus #3 which lines up exactly. Yet in HP it's 414 BMW, 415 ISF, 451 MB, and 505 LS7. Among those 4, ISF is clearly bring up the rear.
You help prove my point, showing how they have MORE displacement and MORE power. Lexus does more with less.
Yes the BMW M3 makes 414hp to the IS-F 416hp with less displacement, but it has 295lbs of torque to the IS-Fs 376lbs of torque. THe M3 is a higher revving motor, the IS-F don't sing as high.
Again, I am not arguing one is better than the other. I am saying traditionally Lexus does more with less displacement.
09-23-09, 03:24 PM
#55
Guest
Posts: n/a
SPRINKLE ME BABY!!! The Acura 3.7 engine makes 300 or 306hp. The Lexus 3.5 makes 280, 303 or 306hp. The Lexus engines are faster, more efficient and award winning. The Nissan 3.7 makes 330hp and what 350hp with the Nismo Z?
09-23-09, 03:31 PM
#57
How is Lexus doing more with less in that V8? You could make a case BMW is doing more with less since it's making most specific HP. You could make a case C63 or even LS7 is doing more - certainly not with less - b/c it's making more HP and more TQ. Lexus is just doing it halfway.
Max TQ is generally correlated to the displacement so it's no surprise LS7 with 7L makes most TQ and BMW make the least with 4L while MB #2 and Lexus #3 which lines up exactly. Yet in HP it's 414 BMW, 415 ISF, 451 MB, and 505 LS7. Among those 4, ISF is clearly bring up the rear.
Max TQ is generally correlated to the displacement so it's no surprise LS7 with 7L makes most TQ and BMW make the least with 4L while MB #2 and Lexus #3 which lines up exactly. Yet in HP it's 414 BMW, 415 ISF, 451 MB, and 505 LS7. Among those 4, ISF is clearly bring up the rear.
Sure fuel economy doesn't matter as much in these applications, but it's still something.
09-23-09, 03:51 PM
#58
Lexus Fanatic
Are you letting the oil pressure and oil temperature come up a little by letting it idle for 30 seconds or so on a cold start before you drive off? (longer, of course, in cold weather). And are you also using the correct recommended oil viscosity for your car? Too-thick oil will not start flowing when cold as fast as thinner oil does. And do you keep the RPM down (below about 3000 or so) when cold.....cold being defined as an engine temperature of less than 140 degrees, when the needle on the temperature gauge is at the low end of normal? If so, and you are still getting knocking sounds when cold, that could indicate any one of a number of problems from an oil leak to worn lifters to piston slap. Piston slap, though, is usually minor, and generally does not hurt the engine. It occurs when there is slightly more than enough clearance between the pistons and cylinder walls when cold, and the pistons literally rattle as they go up and down. As they warm up, of course, the pistons expand, fill in the gaps, and stop rattling. Boxer-type engines on Subarus and Porsches used to have that problem, but it has been worked out of the newer ones.
09-23-09, 03:59 PM
#59
Are you letting the oil pressure and oil temperature come up a little by letting it idle for 30 seconds or so on a cold start before you drive off? (longer, of course, in cold weather). And are you also using the correct viscosity?......too-thick oil will not start flowing when cold as fast as thinner oil does. and do you keep the RPM down (below about 3000 or so) when cold.....cold being defined as an engine temperature of less than 140 degrees, when the needle on the temperature gauge is at the low end of normal? If so, and you are still getting knocking sounds when cold, that could indicate any one of a number of problems from an oil leak to worn lifters to piston slap. Piston slap, though, is usually minor, and generally does not hurt the engine. It occurs when there is slightly more than enough clearance between the pistons and cylinder walls when cold, and the pistons literally rattle as they go up and down. As they warm up, of course, the pistons expand, fill in the gaps, and stop rattling. Boxer-type engines on Subarus and Porsches used to have that problem, but it has been worked out of the newer ones.
The car is always warmed up at least a minute in warm weather and much longer in cold weather.I'm in the winter 10 minute warm up club and low RPMs till the temp gauge needle is moving toward Normal.
I went with dealer changes every 5K miles and just switched over to Amsoil 0w30 to see if that would quiet things down and I still have the knocking.Might go with Amsoil 5w30 and see if that helps.
Of course the dealer says it's normal.I'll go with that for just a little while longer.
