Closed Course Top Speed

[thstone]

Wow! 153mph in a base! The best that I've done is 137mph on a racetrack.

In a rollover, all of the protection is provided by the roll bars (hoops), the top (hard or soft) is pretty much irrelevant to crash safety.

[Idaho Red Rocket 3]

I have felt that light feeling a couple of times when driving alone. I usually do these runs with my wife in the car along with our protective gear (helmets, leather motorcycle coats and gloves) and I put about 50 lbs of ballast in the front trunk because the back truck has our luggage in it. The extra weight really smooths out the car. So with the top, wife, gear , luggage and ballast, I probably add 350 lbs to the car. I know it seems odd, but it works for us.

[The Radium King]

it's a known issue with the boxster that the speedo can read up to 10% higher than actual.

[ProjectM96]

I recently took out 25 lbs of junk out of my rear trunk and about 30lbs of junk out of my front trunk. I went out on the highway last night and got up to 80mph. The car felt very unstable. I felt more tire vibration in the front than usual. First time feeling it. Tires are still in good condition. Alignment seems good to me.

I have been up to 129 and it also felt very unstable with the wind and the feel of the front of the car lifting off the ground. I am looking for a longer straightaway to try to reach my top speed. Maybe Pocono Raceway. Summit Point's straightaway is too short in my opinion.

[stephen wilson]

I'd leave the ballast at home. 50# will only increase the weight on the front end by 4% (more like 3% with 2 people), and will be a detriment to handling and braking.

As far as unstability @ 80, 55# is only 2% of the cars empty weight, not nearly enough to notice.

[BYprodriver]

Originally Posted by stephen wilson

I'd leave the ballast at home. 50# will only increase the weight on the front end by 4% (more like 3% with 2 people), and will be a detriment to handling and braking.

As far as unstability @ 80, 55# is only 2% of the cars empty weight, not nearly enough to notice.

Always think twice before circumventing Porsche engineering that we have paid so dearly for.

[986_inquiry]

Originally Posted by ProjectM96

I recently took out 25 lbs of junk out of my rear trunk and about 30lbs of junk out of my front trunk. I went out on the highway last night and got up to 80mph. The car felt very unstable. I felt more tire vibration in the front than usual. First time feeling it. Tires are still in good condition. Alignment seems good to me.

I have been up to 129 and it also felt very unstable with the wind and the feel of the front of the car lifting off the ground. I am looking for a longer straightaway to try to reach my top speed. Maybe Pocono Raceway. Summit Point's straightaway is too short in my opinion.

Unstable at 129? That seems pretty low to feel unstable. I've had mine at 135 and it felt fine, same as 60

[MileHighBoxster]

Originally Posted by The Radium King

it's a known issue with the boxster that the speedo can read up to 10% higher than actual.

That, of course, depends on the speed you are doing. Mine is off 3 mph based on many GPS comparisons. At 50 mph - that's 6%, but at 100 mph it's only 3%. Since I'm generally between 80 & 85 mph on the highway, mine is therefore off .03529%. Certainly not enough to worry about.

[blue2000s]

Originally Posted by thstone

Wow! 153mph in a base! The best that I've done is 137mph on a racetrack.

In a rollover, all of the protection is provided by the roll bars (hoops), the top (hard or soft) is pretty much irrelevant to crash safety.

Try sliding along the pavement upside down. It brings a whole new appreciation of steel.