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Click above for a high-res gallery of the SPI Sledgehammer

Most stock components in a production car can only be pushed so far. Keep adding horsepower and torque, and eventually...well, something is going to break. Some people, however, are all about exploring the limits. Take Tym Switzer, for example. His tuning company, Switzer Performance Innovation of Oberlin, Ohio has come up with a bolt-on tuning package for the Porsche 997 911 Turbo that offers Bugatti Veyron aping performance. So, how much power can the stock internals in Stuttgart's 3.8-liter flat-6 take? Apparently, quite a lot.

The shop has recorded 850 horsepower and 727 lb-ft of torque on the rolling dyno, equating to over 1000 horsepower at the crank. Real world performance should be mind boggling, with the car reportedly reaching 60 miles-per-hour in the mid two second range, blowing through the 1/4 mile in just 9.79 seconds at 146 mph. Pricing looks to be just as fierce, with the Sledgehammer package retailing for $49,990. While that's a lot of coin for a suite of bolt-ons, the performance would appear to speak for itself. Videos of both the dyno run and the 1/4 mile pass can be viewed after the jump as well as SPI's official press release.

[Source: Switzer Performance Innovation]


Tym Switzer has been quietly running Switzer Performance Innovations (SPI) in Oberlin, Ohio for several years, building show-quality exhausts and bolt-on performance products for twin-turbo Porsche 996 and 997 models.

With his latest project, Tym and the crew at SPI wanted to test the limits of what would be possible with stock 997 internals. "When the customer first came to me with his 997, we talked a lot about about pushing the limits the new engine and what might be possible using stock internals. I had already been inside the 997 turbo engines, and felt that 700 wheel horsepower seemed well within reach on pump fuel, and that we might be able to go a bit further."

That "bit further" eventually led to what Switzer calls the SLEDGEHAMMER. Named after candid comment from an SPI tech, the SLEDGEHAMMER is a bolt-on performance package for 997 twin-turbo Porsches that delivers over 850 all-wheel horsepower on race fuel. That's over 1000 hp at the crank!

Getting Bugatti-baiting performance figures from a bolt-on prepared 997 is no easy task, though. Switzer explains he and his crew "have always prided ourselves on attention to detail and delivering exactly what we promise to our customers. We have a saying around here: performance, not excuses. So during the original SLEDGEHAMMER build we looked at every part of the system, constantly metering and testing every component, on our in-house chassis dyno."

A finished Switzer SLEDGEHAMMER is certainly an amazing car. Switzer reports that (despite backing off the throttle early) the first SLEDGEHAMMER (pictured) went almost 195 mph at the Texas mile. Additional performance figures read like the stuff of legend: consistent 0-60 times in the mid 2's, less than 5 seconds to go from 60-130 mph, and 9.8-second quarter mile elapsed times with trap speeds regularly in excess of 145 mph. "With performance like that, these cars really speak for themselves - I have another one on the dyno now, and expect to post the results of those runs shortly."

In addition to extensive ECU tuning, the SLEDGEHAMMER package includes SPI's in-house developed headers and sport exhaust, as well as SPI's MONSTER intercooler package (shown) and SPI-massaged GT30R turbos. More details on Switzer's SLEDGEHAMMER conversion can be found on SPI's website. The SLEDGEHAMMER package retails for 49990USD, and is available through SPI. Contact SPI for more information.

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    • 1 Second Ago
      • 6 Years Ago
      why not the LS2LS7?: Are you seriously trying to tell us you can somehow gauge the speed of a car by looking at it from the back in a video? Are you saying you think the trap time is faked? Have you ever seen a 911T at the drags? They don't spin the tires, they just GO.

      The 911's rear engine is ONLY useful at a standing start, ie drag racing. Everything else it can do is the result of 30 years of German engineers trying to make up for for their mistake while still saving face.

      There's a reason the Cayman is the better car in its very first incarnation.
        • 6 Years Ago
        I'm specifically referring to the 0-60. Do you see a 0-60 listing in that video? Me neither. So why do you say I'm disbelieving the figures in the video?

        Yes, I'm saying I disbelieve the "consistent 2 (.x) second 0-60" and I'm also saying likely that video isn't showing one of the 0-60 recordings anyway (you don't get 0-60 off a light tree).

        And I'm not saying I can tell you how fast a 0-60 is for a car from the video. But I'm saying I think that isn't a 2.x 0-60. Again, look at some of the Z06 drag launches. Those aren't 2.x second 0-60s either and yet they launch a lot better than that. I will back off saying that I don't think 1000HP is enough for consistent 2.x second 0-60s though.

        No, I have never see a 911T at drags.

        As to the rear engine only having advantages at drag races, you are wrong and frankly you're embarrassingly wrong. If you only learn one thing from what I'm posting here, learn that. We can argue about the rest of the stuff until we are blue in the face. However, the 911 has earned its stripes on the track, not at the strip.

        The rear engine is useful for braking (when the weight of the car shifts forward, it still has more weight on the rear so the rear brakes can do more braking). It is useful in tight turns, because as I said before, it moves the mass to the part of the car that moves the least. Look at a top down video of a car doing a slalom. Mark the center of the front axle, rear axle and center of the car, all along the left/right centerline. Note them as the car does a slalom. You will see the front of the car moves left and right a lot more than the rear. Thus, by moving the engine to the back, you don't have to move as much mass as far, and thus you can do so more quickly (given equip grip tires). This makes the car more darty. However, the lateral loads on the rear tires on a long sweeper will be higher, so it loses out on those turns and in fact can wear out its rear tires quickly in those kinds of tracks.

        The Cayman is a good performer. But just because it is a good performer all around, even if it is a better performer all around than a 911, doesn't mean the rear engine layout doesn't have some advantages of its own on the track. It might mean those advantages don't outweigh the disadvantages though.
        • 6 Years Ago
        I just want to know why he has to reply like 7 times.
      • 6 Years Ago
      50k is a bargain. MTM charges the same for the RS4/R8 supercharger.
      • 6 Years Ago
      I love the sound of the turbos around 50 seconds into the dyno test vid. They sound completely evil as they howl like banshees.

      I gotta get me one of these cars, someway, somehow.
      • 6 Years Ago
      dude, i think i just filled the cup.
      • 6 Years Ago
      Lemme get this straight, you can get 1000...thats ONE THOUSAND horsepower from a 911T with only 50,000 dollars?!! That's gotto be the best deal I've ever heard. It's ridiculous that you can have Bugatti-esque performance with 1/4th the money. Dont give me crap about Bugs 240mph top speed. apparently you can only hit that VW test track. This car is much more usable.
        • 6 Years Ago
        Well i can only assume parking a veyron is a bitch and when the time come for a service and parts replacement, it's going to be a whore. So i guess it'll be 100% more useful than a veyron.
        • 6 Years Ago
        I take it you never parked a supercar by the roadside? It's not how easy to park it, it's what would've been done to it AFTER you parked it. If some asswipe keyed your car, i bet the paintwork on a 911 is waaay cheaper than veyron's.
        And if you want to talk about dimensions, a 911 is shorter than a Prius and veyron is the size of white house.
        • 6 Years Ago
        Then again, in all fairness, one tire for a Veyron costs something like $10,000. I can't imagine how expensive simple replacement engine internals would cost. At that kind of expense, buying a couple whole new 911 turbo motor for $60,000 doesn't sound so bad.
        • 6 Years Ago
        Porsche's engine reliability record is spotty at best, bolting a bunch of warranty voiders on it is not going to make it more usable.
        • 6 Years Ago
        I have a feeling that the Veyron will not only drive better, but the engine will actually handle the power it has and last much longer. Still id like to see how long that Porsche does last with that much power, because its one hell of a beast.
      • 6 Years Ago
      I have a very hard time believing that the engine or trans would last much more than a few launches or minutes of hard driving at that kind of power with fully stock guts. I don't doubt it is a great factory setup, but there is no way it was designed to take anywhere near that..
      • 6 Years Ago
      I wonder how long the engine will last.
      • 6 Years Ago
      I can't see how they got that car to 60 in 2.x s. Especially with how poorly it hooks up in the video.

      Don't get me wrong, once it gets up to speed it is VERY VERY vast.

      But it doesn't seem that impressive off the line. And you don't get to 60 in 2.x seconds (let alone consistently) by being not impressive off the line.

      Go watch some of the videos that got linked to on this site of Z06's launching. In those vids when it launches, you think "wow, that launched like a real drag racer". This doesn't look anything like that. So I don't get the numbers.
        • 6 Years Ago
        That's what traction off the line due to the rear engine placement looks like. It's the 911's only party trick, and the trade off is having to worry about it killing you every time you turn the wheel, go over any bumps or try to brake.
        • 6 Years Ago
        I'm not sure either of you read my post.

        It doesn't get going quickly. It doesn't hook up well (or bogs). How do you do 2.xs 0-60 when you don't get going quickly?
        Also, I would say the 911's primary party trick is that moving the engine to the back reduces the amount of mass that has to move with the front wheels, reducing front wheel loading and making the car very darty. This is useful on the track, whereas off the line grip isn't so much since it only functions from a standing start, which is rare in racing.

        I guess what I'm saying is I don't believe it from this video. I'd love to see a video where the car does turn a 2.x 0-60. Frankly, I'm skeptical, 1000HP doesn't seem like enough to turn consistent 2.x 0-60s.
      • 6 Years Ago
      18 comments, and NO ONE notices the number of the beast on the godzilla macheen??!!

      C'mon! Who cares about a 1000hp deathtrap. There's comedy fodder there!
      • 6 Years Ago
      And I jizzed in my pants.

      Ridonkulously sexy sounding.
        • 6 Years Ago
        Unfortunately, without the extra radiators, adequate tires, strengthened frame, aerodynamics and brakes, it will never reach speeds like the Veyron, let alone 200 mph.
        • 6 Years Ago
        yes!!! indeed!!!

        Vote for autoblog!!!

        • 6 Years Ago

        If this can do 230-240mph without flipping over then pigs really can
        fly. The 9ff is as different from this thing as a Carrera GT is.
        • 6 Years Ago

        9ff has more cars than the radical GT9 and GT9R

        9ff V400 is a normal shaped 911 (996)
        topspeed (tested) 388km/h (242mph)

        9ff T6 (911 convertible)
        topspeed tested 380km/h (237mph)
        worldrecord fastest streetlegal convertible

        Sportec SPR1 (997 Turbo)
        topspeed (tested) 378.4km/h (236mph)
        • 6 Years Ago

        this car should have no problems to reach 235-240mph and with aerodynamic improvments even more, that are speeds similar powerfull Porsche reach in europen topspeed tests.

        In 2004 9ff reached with the 9ff V400 388km/h (242mph) at the Nardo test track. This Porsche was equipped with a 838hp flat6.

        Pretty sure this tuned 1000hp 911 Turbo can reach 390km/h
      • 6 Years Ago
      It's only a matter of time before something breaks. Nice car though.
      • 6 Years Ago
      I don't like them stealing the callaway corvettes name.
      Million names out there, they should of used something original.

        • 6 Years Ago
        Also they stole the name of a tool used to fix race cars.
        • 6 Years Ago
        Unfortunately, human language has only so many words.
        • 6 Years Ago
        Human language?

        Maybe you mean the English language.

        There are at least 60 useful human languages to work from. There are plenty of words left to apply to a car that haven't been used yet.
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