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10-14-10, 10:09 AM
#19
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Most of my 0-60 on the drag were 4.8ish stock, but lowered rear PSI, 1/4 gas, no spare and traction control off. Times later improved to around 4.6ish with an intake and exhaust mod. The tempeture was probably low 80's and DA from 1,200 to 2,000. This was calculated on the 1/8 drag, using an iPhone dyno app, and numbers reconilced with the time slip. No idea on stock with stock rear 38 PSI as I didn't clock my numbers when I first started.
I wouldn't other launching on street tires. After looking at my slips, higher 2,500 launches gave me wheel spin, and 1,000ish launches was basically the same thing as slamming the throttle as the engine revs up to 1,000ish before any power hits the wheels anyways.
Revving your car at a stand, do you mean a burnout? Revving your engine doesn't do anything as you can be in park or nuetral to do this. Burning out means turning off traction control, and slowly giving it gas while slowly releasing the brakes to let the rear tires lose traction. Are burnouts bad for tread? On a street tire, absolutely, as they are not designed to heat up or burn out. I think I lost about 1/3 of my tread when I got new tires in July, and my valve recall service a month ago when they also checked my thread.
Edit: 1/3 of my tread in 60 or so drag runs, 50 of them with burnouts, and I have driven only 2,000 miles since I first got them; these are supposed to be 20k+ mile tires too, stock from the dealer.
Revving your car at a stand, do you mean a burnout? Revving your engine doesn't do anything as you can be in park or nuetral to do this. Burning out means turning off traction control, and slowly giving it gas while slowly releasing the brakes to let the rear tires lose traction. Are burnouts bad for tread? On a street tire, absolutely, as they are not designed to heat up or burn out. I think I lost about 1/3 of my tread when I got new tires in July, and my valve recall service a month ago when they also checked my thread.
Edit: 1/3 of my tread in 60 or so drag runs, 50 of them with burnouts, and I have driven only 2,000 miles since I first got them; these are supposed to be 20k+ mile tires too, stock from the dealer.
Last edited by Raralith; 10-14-10 at 10:16 AM.
10-14-10, 02:47 PM
#25
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Posted this in another thread and wanted to post it here also incase people miss it:
Here's a question about the 3IS.
Will Lexus increase the Horsepower and Torque on both models?
I ask, because Infiniti increased the power for their G35/37 from 300 to 330. They even have a G25 with 220hp.
Also with BMW, they have their 335is with 320hp, and their 328i has 230hp.
^Both of them are obviously competing with the IS250/350, but their cars have more power and torque.
So, will Lexus increase the power of the 3IS also?
I'd love to see an IS250 pushing 230-250hp, and an IS350 pushing 320-340hp, both stock. That would be amazing. But will they/are they, gonna do it?
Here's a question about the 3IS.
Will Lexus increase the Horsepower and Torque on both models?
I ask, because Infiniti increased the power for their G35/37 from 300 to 330. They even have a G25 with 220hp.
Also with BMW, they have their 335is with 320hp, and their 328i has 230hp.
^Both of them are obviously competing with the IS250/350, but their cars have more power and torque.
So, will Lexus increase the power of the 3IS also?
I'd love to see an IS250 pushing 230-250hp, and an IS350 pushing 320-340hp, both stock. That would be amazing. But will they/are they, gonna do it?
10-14-10, 03:12 PM
#26
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I really don't see the IS 350 pushing 320HP at the crank in stock form out of a naturally aspirated 3.5 liter engine; very few cars can push 100HP per liter. G37's can push a bit more with a tiny bit bigger engine, and the 335i's have turbos so that's not really apples to apples. I don't really see us getting forced induction either due to compression ratio on our cars, and also that you can buy an IS F for basically the same price the aftermarket charges. No idea on the IS 250, but that seems to be a different market segment.
10-14-10, 03:58 PM
#27
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0-100 in 8.8 and a standing qtr in 12.4 at 122mph on 100 shot nitrous. 8min 10 seconds for a bridge to gantry lap of the 'ring.
Here she is in action with no nitrous onboard.
http://vimeo.com/11100503
Here she is in action with no nitrous onboard.
http://vimeo.com/11100503
10-14-10, 04:15 PM
#28
The IS350 already pushes out almost 320 HP at the crank bone stock.
Lexus' claim of "306" is arbitrarily reduced by 10 from what the engine is rated at out of factory. The engine is technically rated at 316 HP (crank) from the factory - 4 off from that 320 range you are wishing for.
This is consistent with the fact that - assuming the typical 15% drivetrain loss - stock IS350s dyno around 268 whp (which is equivalent to 316 crank HP).
The BMW 335i cranks out more like 325 - 330 HP - not the "300" that BMW claims. BMW understated the engine by 25-30 because "300" is a nice, round number that lends to catchy advertising, probably.
The G37's horsepower increase to 330 at the crank is useless because the G37 is a slower car than the '08 G35. That increase in peak horsepower was mitigated by the G37's increase in weight.
The fact of the matter is the G37 (marketed at 330 HP) is slower than both the IS350 (marketed at 306 HP) and the 335i (marketed at 300 HP) partly because the IS350 and 335i are underrated, partly because the G37's weight also increased relative to the G35, partly because the IS350 has 4.08 gears stock compared to a less aggressive (for low end acceleration) final drive ratio in the G37, and mostly because the G37 has lower net area under the horsepower/torque curve as a function of RPM within the power band.
Lexus' claim of "306" is arbitrarily reduced by 10 from what the engine is rated at out of factory. The engine is technically rated at 316 HP (crank) from the factory - 4 off from that 320 range you are wishing for.
This is consistent with the fact that - assuming the typical 15% drivetrain loss - stock IS350s dyno around 268 whp (which is equivalent to 316 crank HP).
The BMW 335i cranks out more like 325 - 330 HP - not the "300" that BMW claims. BMW understated the engine by 25-30 because "300" is a nice, round number that lends to catchy advertising, probably.
The G37's horsepower increase to 330 at the crank is useless because the G37 is a slower car than the '08 G35. That increase in peak horsepower was mitigated by the G37's increase in weight.
The fact of the matter is the G37 (marketed at 330 HP) is slower than both the IS350 (marketed at 306 HP) and the 335i (marketed at 300 HP) partly because the IS350 and 335i are underrated, partly because the G37's weight also increased relative to the G35, partly because the IS350 has 4.08 gears stock compared to a less aggressive (for low end acceleration) final drive ratio in the G37, and mostly because the G37 has lower net area under the horsepower/torque curve as a function of RPM within the power band.
10-14-10, 04:19 PM
#29
Oh, the 335iS does not compete with the IS350. Are you kidding me?
Do you know how much a loaded 335iS costs? $60,000. You heard right, $60,000 for a loaded "320 HP" (probably understated) 335iS.
Do you know how much a base BMW M3 sedan costs, brand new? $55,000. A partially-equipped 400 HP+ M3 sedan costs as much as a loaded 335iS.
The 335iS competes with the M3, ISF, RS4 - not the IS350, G37, etc. This is blatantly evident by the price differential.
In my opinion, the 335iS is an utterly useless product. To me, the only options that make sense are the 335i and the M3. Why would you want to pay M3 money for a car that has 80 less horsepower? The only thing the 335iS has over the M3 is it's probably more forgiving as a daily driver than the M3.
For my money though, I'll suck up the relatively greater harshness of the M3 for that extra performance.
Do you know how much a loaded 335iS costs? $60,000. You heard right, $60,000 for a loaded "320 HP" (probably understated) 335iS.
Do you know how much a base BMW M3 sedan costs, brand new? $55,000. A partially-equipped 400 HP+ M3 sedan costs as much as a loaded 335iS.
The 335iS competes with the M3, ISF, RS4 - not the IS350, G37, etc. This is blatantly evident by the price differential.
In my opinion, the 335iS is an utterly useless product. To me, the only options that make sense are the 335i and the M3. Why would you want to pay M3 money for a car that has 80 less horsepower? The only thing the 335iS has over the M3 is it's probably more forgiving as a daily driver than the M3.
For my money though, I'll suck up the relatively greater harshness of the M3 for that extra performance.
10-14-10, 07:40 PM
#30
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0-100 in 8.8 and a standing qtr in 12.4 at 122mph on 100 shot nitrous. 8min 10 seconds for a bridge to gantry lap of the 'ring.
Here she is in action with no nitrous onboard.
http://vimeo.com/11100503
Here she is in action with no nitrous onboard.
http://vimeo.com/11100503