MY 350 is getting slower now :(
#17
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that's probably because you get used to PWR...i tried that once, i switched back to normal during the work week and on the weekend i put it back to PWR and holy crap the difference! then i started getting used to PWR again...i wish there was a PWR PWR button somewhere
#19
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Weather conditions (atmospheric pressure, humidity, temp.) have a major affect on times. It is amazing how big of a difference one day to another makes. Sometimes without that much of difference in conditions. There are days where you are not going to get good times for no apparent reason. If after a couple visits, you come up with the same lower results you need to look back at what may have changed. I do not think the mileage had anything to do with the times.
Koz
Koz
#20
Lexus Champion
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I'm with gern on this one also. It probably took at least 4-5K miles on the odo before my rears started breaking loose while in first gear. It never did that before.
With that said, after the initial break-in when the engine does get a little stronger, you will start to lose power as the engine wears. This shouldn't really happen until you get up there in miles (20-40K depending on the engine and maintenance.) The only engine that doesn't follow this is the Wankel powered Mazdas, which continue to get stronger as you rack up the miles.
With that said, after the initial break-in when the engine does get a little stronger, you will start to lose power as the engine wears. This shouldn't really happen until you get up there in miles (20-40K depending on the engine and maintenance.) The only engine that doesn't follow this is the Wankel powered Mazdas, which continue to get stronger as you rack up the miles.
#25
Tech Info Resource
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iTrader: (2)
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Resetting the ECM will only change the A/F to the initial factory settings for a very short while.
The learning mode for the transmission will not affect WOT runs, only part throttle shift points based on your driving habits. Besides, the transmission shift points will only affect ET, not trap speed. Trap speed is your best indicator for horsepower. You can change gearing all you want and change your ET, but your trap speed will be pretty constant regardless of your gearing. Low traps mean low power. High traps mean high power. It's the easiest way to compare two "identical" stock cars. The one with the higher trap speed has the better engine. Period, end of story, no real driver skill required.
#26
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I think Rasengan’s comments could be worth considering, because after driving in a less aggressive manner during the last few months, due to snow tires and winter road conditions, my IS350 was feeling a bit sluggish. Just during the last week, with my summer rubber on and resuming my regular driving habits, she is performing back to normal.
#28
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Maybe it's the weather over the whole country right now. Huge Low pressure systems. I'm going back to the track tonight with the new Tanabe exhaust and I'll let you know if it's still running consistent or not. Barometric pressure right now sucks at 29.80 and dropping.
Have you guys seen this Altitude Density calculator? http://users.erols.com/srweiss/calcda.htm You may want to start using it and plugging in weather conditions and compare which nights are better for the car. Combfilter, most likely you just had some weather variable against you.
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#29
Tech Info Resource
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That's even more depressing. The density altitude the night I went to the track was -712 ft. Getting less than 82 mph in the 1/8 at this density altitude means my engine is weak. Really weak. I may have to remedy that soon.
If you want to find a very local weather station with historical statistics, click here. They have everything you need to calculate altitude density for literally thousands of locations across the country, not just the airports, but even the neighborhood stations.
If you want to find a very local weather station with historical statistics, click here. They have everything you need to calculate altitude density for literally thousands of locations across the country, not just the airports, but even the neighborhood stations.