Alfa,. can you make the equipment to make a SS achieve 180 MPH?

I am pretty sure you couldn't get a sling to do 180 down hill with a jet engine bolted to the rear deck.
If you could get over 150 you would most likely tear the nose off!

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Wow... Like everyone has stated. Just not possible aerodynamically speaking in stock form. 184mph at redline on a Dyno alone proves it. No resistance either from the wind or even the front tires.

Some people scare me.

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I don't want to come across as a freaking know-it-all, but if you're going to retain the Polaris ecu (even with Bob's tune) the ecu sets a maximum speed setting at 160 mph. As Rabtech stated, there's no way the stock body could be stable enough or have enough power to overcome the massive wind resistance this has.Unless Bob gas been able to access that part of the ecu, it's going to stay that way. (Not sure even if he could, he would probably not want the liability to set that max speed any higher)

Quote from funinthesun

I don't want to come across as a freaking know-it-all, but if you're going to retain the Polaris ecu (even with Bob's tune) the ecu sets a maximum speed setting at 160 mph. As Rabtech stated, there's no way the stock body could be stable enough or have enough power to overcome the massive wind resistance this has.Unless Bob gas been able to access that part of the ecu, it's going to stay that way. (Not sure even if he could, he would probably not want the liability to set that max speed any higher)

I may be a little crazy - but not crazy enough to drive anything that unstable at that speed.

just because it does 180 on a dyno does that mean on the street it will do that? I'm guessing not because of aerodynamics, wind resistance, weight and traction issues.

Quote from rabtech

I hate to say this. But you couldn't push it out of an airplane and get it to fall at 180mph!

You might strip all the plastics off and fashion some sort of a beak to cut through the wind. But at that point it wouldnt be a slingshot. It would be a rail job with a nose cone.

And that wouldn't be to hard to push into the 170 180 range. But who the hell would dare put one of these twitchy things over 150mph?

I have pushed mine up to 135 and it was still pulling very hard in 5th gear. But it gets really squirrely at those speeds... so I back out every time.

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I'm always afraid anything north of 120 is going to cause the fenders to fly off. When we were stock, it was a struggle to get to 105. Now supercharged 100 happens almost every trip at some time. I must agree with @rabtech that these things are as aerodynamic as a brick. I have no idea what top speed is with this Alpha Supercharger on here at anything over 100, I'm too busy looking at the road to see the gauges!

Quote from funinthesun

I don't want to come across as a freaking know-it-all, but if you're going to retain the Polaris ecu (even with Bob's tune) the ecu sets a maximum speed setting at 160 mph. As Rabtech stated, there's no way the stock body could be stable enough or have enough power to overcome the massive wind resistance this has.Unless Bob gas been able to access that part of the ecu, it's going to stay that way. (Not sure even if he could, he would probably not want the liability to set that max speed any higher)

That speed is listed in the ECM, but it is under an odd parameter. There is still a debate on what it actually does. It could possibly be a setting limit on where the cruise cannot be set anymore. Cruise disables over 160...?

Or it is an actual speed limiter and the ones going over 180mph on the dyno weren't limited because only the rear was spinning.

It can be changed in the ECM, but there probably isn't a good reason to do so...

Even in a car that speed is scary ...just remember you don't have air bags..and technically there isn't even anything close to a bumper out there..and the crumple zone probably goes from the head lights right past the rear view camera...

Quote from rabtech

I hate to say this. But you couldn't push it out of an airplane and get it to fall at 180mph!

Terminal velocity varies with drag but it should be around 122 mph falling from an airplane.

Top speed on a sling is so silly. That's the one question I get asked allot when strangers see a slingshot "how fast does it go/whats the top speed" I truly don't get why so many are infatuated with top speed. The sling is aerodynamically challenged and feels like it will lift off at 120+ not to mention the fenders are huge parachutes

I'm going to jump in here on this, I have had my SS over 150mph a few times, handled great! You can call BS, I don't care. We have some great Tollways here and at night they are empty, only trouble I have is reading the Speedo after 140 as the numbers are closer together and that's really not what I am looking at, at those speeds, if anything I look at the RPM's and that's only for a second. I also have better than stock tires on it for safety... I also have my fenders Zip ties underneath to keep all the flexing out.

This is before SC but ECM flashed, 130plus in 4th not even close to redline......