top speed
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richduty455
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yea idk about 158.....although i did do 159 one time in a 99 trans am....159 is when the top speed limited kicks in....but that was a car with some mods and aerodymanice....not to mention about another 100hp...but that car struggled after 150....so 158...idk
WhoBeDaPlaya
Well-Known LVC Member
Naw. That was offered in the ub3r l33t package together with Mr. Fusion
I can believe that as a former f-body owner, but as you pointed out that is a much more areodynamic car with a TON of torque. With the 6 speed you could hold 5th gear and go forever. Maybe i'm wrong but i dont see the LS as a super aerodynamic car, especially at 100+ mph. I see the drag at those speeds a real obstacle. Again my main problems with his claim are not only that he actually hit 158, much less pegged out the speedo, but that he "walked" on another car from 140 to 158 mph. No way. The few on here that have posted the top speeds for the LS were in a controlled setting, with a complete straight and flat surface and what i would consider a heavily modified LS as compared to stock. No way he did 158 on a highway. He has yet to reply but unless he can show he has some decent mods to his 1st gen then this claim is totally bogus. Maybe he has some aftermarket wheels and tires and his speedo is way out of calculation. Hell, if i'm not mistaken an ES Lexus has a V6 which i doubt it alone could reach 140, so i'm still calling this a B.S. story.
zintkala
Active LVC Member
On a 45 degree or so morning at 3am last Febuary with no wind North of Charlotte on I77 I saw a GPS verifed 152 mph. The speedo was pegged. I backed out at that point. Pulled fairly good to 145 took a while after that. There might have been another few mph left but it was good enough for me. That was on a fresh set of plugs, new fuel filter, good gas, all new synthetics (motor, trans and rear end) and getting aggressive with the timing on ILLS Track Tune. Not a way I could run on the street on a daily basis. No pic as I was by myself and concentrating on driving. Scary to think of deer and other stray animals or road debris at that speed, let alone any parts or tire failures. Don't think I would try it again unless it was with a fully prepped car on a track or controlled roadway/event. Too many things can go wrong not to mention the police.
Reminds me of years ago when I topped my race prepped SCCA C/P mustang with a much hotter than legal motor out at 187mph on I90 in the middle of South Dakota on a quiet night. Funny how you think you are invincible when you are younger. A herd of Antelope alongside the Highway cured me of that nonsense. Scared the livin crap out of me! Except for that one night in Feb. I've never tried anything like that since.
Reminds me of years ago when I topped my race prepped SCCA C/P mustang with a much hotter than legal motor out at 187mph on I90 in the middle of South Dakota on a quiet night. Funny how you think you are invincible when you are younger. A herd of Antelope alongside the Highway cured me of that nonsense. Scared the livin crap out of me! Except for that one night in Feb. I've never tried anything like that since.
Ok, and you have what i would consider a fairly modified LS and a 2nd gen. I keep hearing about GPS speed verifications. Are GPS really that accurate when used in cars? Never used one personally. And you raise a point with one of my issues in that from 145 to 152 it took a while and i'm sure alot of road. I guess the 45 degrees also played a role. This guy is making this claim a few weeks ago and its fairly warm this time of year, i'm sure alot warmer than 45 degrees.
GPS is about as accurate as you can get without a radar/lidar gun. (depending on the GPS of course, most are good.)
Quik LS
Dedicated LVC Member
believe it or not - both cars have a drag coefficient of 0.32
zintkala
Active LVC Member
Yeah as far as 158mph in that kids car? I don't buy it. He very well could have been doing 140+ though if he has a Gen1 sport or a good tune, which would scare me to death if I were him and doing it in traffic too? Considering the state of tune the vast majority of cars on the road are in, those are potentially lethal speeds. Think about tire or parts failures! Just reinforces my opinion that 95% or more of the people on the road do not have the ability to safely control or understand the vehicles they own even at normal speeds. Probably watched "Fast and Furious" a few too many times.
My run was under pretty close to perfect conditions, car and weather. Might be a little more in her with narrower tires, lowering and a homemade splitter and rear diffuser, maybe a partial belly pan. It wouldn't be much though, wouldn't be as streetable and how often would you get to find out anyways? Who cares....it's my daily driver, not a dedicated track car.
My run was under pretty close to perfect conditions, car and weather. Might be a little more in her with narrower tires, lowering and a homemade splitter and rear diffuser, maybe a partial belly pan. It wouldn't be much though, wouldn't be as streetable and how often would you get to find out anyways? Who cares....it's my daily driver, not a dedicated track car.
JWerner2
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zintkala
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Nope, it was on the 19's. They are pretty light though, not that much more than the stockers. It was on different tires though. Nitto 555's 245 fronts and 275 rears. The Nitto's are relatively light weight. Don't know about you guys but ambient temp makes a big difference in how my car performs. No way I could do that at 75 degrees or warmer. At those speeds wind makes a big difference too. A little head or side wind can knock off more mph than you would think.
JWerner2
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I got it above 150 once after my 19's. I thought it was odd. It was probably the one time I ever took it over 80.
I think its just the wheel size throwing off the calibration on the speedo like Quick said, at least for us cause I only had the intake ( adapter only at the time ) and exhaust kit.
I think its just the wheel size throwing off the calibration on the speedo like Quick said, at least for us cause I only had the intake ( adapter only at the time ) and exhaust kit.
Not too long ago a state trooper in a police package Camaro SS went after two cars racing, he had a tire shred apart at high speed and he flew off the road and got killed, and most law enforcement vehicles have above average maintenance records. I dont know what speed rating most of you are using, but i wouldnt trust my car doing 140+ mph, anything happens and your dead. I've already had two of my fairly expensive Bridgstones have defects and one of them had about a 12 inch chunk fly off while at highway speed, i posted some pics back when it happened. Something like that happens during a 100+ mph run and bad things happen.
So why hasnt this guy posted back? Maybe my quote thats in Quiks signature is true??
zintkala
Active LVC Member
Had nothing to do with the speedo being off because of the different tire sizes than stock. Read the whole thread, read it off my GPS. The speedo was pegged. If anything the shorter tires helped a little bit as it made for a slightly but noticable lower gear, all about optimizing the max torque/rpm/air resistance ratios.
A good example of this was that my 87 Stang was signifigantly faster on the top end in 4th than in 5th gear when it was close to stock on 3.08's. The gearing was much better optimized in 4th with the torque curve of the motor allowing me to run up to redline. Can't remember exactly where it would stop in 5th but was somewhere around 4k and about 10mph slower.
In racing we would continuously change gear ratio's in the trans and rear end to allow us to hit target rpm/speed points at the end of certain straights or turns to maximize the top speed attainable over a given distance or to balance top speed versus acceleration and/or fuel mileage trade offs. Too tall of a gear and you run out of torqe before hitting the potential top speed, too short and you run out of rpm. It's all a balancing act that from the factory is not a consideration of the engineers at all for 99% of the cars out there. They are more concerned with comfortable cruise rpm's in targeted speed zones such as the fact that most cars are at right around 2k at 65 mph which is where most engines operate most efficiently at part throttle.
A good example of this was that my 87 Stang was signifigantly faster on the top end in 4th than in 5th gear when it was close to stock on 3.08's. The gearing was much better optimized in 4th with the torque curve of the motor allowing me to run up to redline. Can't remember exactly where it would stop in 5th but was somewhere around 4k and about 10mph slower.
In racing we would continuously change gear ratio's in the trans and rear end to allow us to hit target rpm/speed points at the end of certain straights or turns to maximize the top speed attainable over a given distance or to balance top speed versus acceleration and/or fuel mileage trade offs. Too tall of a gear and you run out of torqe before hitting the potential top speed, too short and you run out of rpm. It's all a balancing act that from the factory is not a consideration of the engineers at all for 99% of the cars out there. They are more concerned with comfortable cruise rpm's in targeted speed zones such as the fact that most cars are at right around 2k at 65 mph which is where most engines operate most efficiently at part throttle.
richduty455
Dedicated LVC Member
does your GPS read over 100??? my girlfriend's GPS won't read after 100....I know this for a fact 