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Sledgehammer question.

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Old Apr 26, 2010 | 03:06 PM
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Default Sledgehammer question.

I was looking up info about the Sledgehammer and some of the performance numbers caught my attention. Nearly 900 horsepower and 780 ft/lbs torque, but the 0-60 is only 4 seconds, with a 1/4 time of 10.6? It seems like it should be faster than that running those numbers. Maybe the gearing was more for the top speed?
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Old Apr 26, 2010 | 03:09 PM
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Gearing for sure, and I'm sure it wasn't easy getting traction in the 1/4 mile.
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Old Apr 26, 2010 | 03:21 PM
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Originally Posted by shakedown067
Gearing for sure, and I'm sure it wasn't easy getting traction in the 1/4 mile.
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Old Apr 26, 2010 | 04:22 PM
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Yeah, it's all about putting the power down. John Meaney's 91 with over 1000hp ran a low 11 1/4 mile...at 154mph though!
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Old Apr 26, 2010 | 04:35 PM
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Originally Posted by ks5shooter
With the

For the most part, when you purpose build a car, you focus on your goal. And for the Sledgehammer it was to be a car that can go 250mph+ and still be a daily driver! Plus, back then the technology was different and Im sure the budget was a significant factor. Today the Bugatti Veyron is a good example of the high tech version of the sledgehammer with a blazing top speed, quarter mile, and 0-60!
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Old Apr 26, 2010 | 04:41 PM
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Are there any specs on what exactly they did to the sledgehammer to give it those power numbers? Tire width, etc. Curious, for perhaps a later in life goal.
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Old Apr 26, 2010 | 05:05 PM
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Originally Posted by Azriel
Are there any specs on what exactly they did to the sledgehammer to give it those power numbers? Tire width, etc. Curious, for perhaps a later in life goal.
This is a great video, check it out! Really sums up their project!

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Old Apr 26, 2010 | 05:20 PM
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Originally Posted by dogfish246
This is a great video, check it out! Really sums up their project!

Cool vid. Good info!
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Old Apr 26, 2010 | 06:13 PM
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Originally Posted by Azriel
Are there any specs on what exactly they did to the sledgehammer to give it those power numbers? Tire width, etc. Curious, for perhaps a later in life goal.
Start with a 6k tpi corvette... Add turbo then.... i donno lol
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Old Apr 26, 2010 | 06:19 PM
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It's real easy to over rev a turbo engine in first gear. It's often best to get it rolling and then go for second gear. The turbo takes over in the higher gears.
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Old Apr 26, 2010 | 06:29 PM
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Originally Posted by dogfish246
This is a great video, check it out! Really sums up their project!

love that video
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Old Apr 26, 2010 | 06:38 PM
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10.6 for a street car that they drove to the track and then went 250 MPH with is amazing if you ask me.
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Old Apr 26, 2010 | 06:40 PM
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Originally Posted by floridamale
10.6 for a street car that they drove to the track and then went 250 MPH with is amazing if you ask me.
Absolutely amazing, no doubt. Makes the Veyron look less impressive if you ask me, I just personally thought the quarter time seemed low.
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Old Apr 26, 2010 | 11:22 PM
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My only question to the whole sledgehammer project was if it was so great of a car why was only '1' made and why did callaway instead mass-produce the much slower aerobody TT car?

We didnt have the internet to discuss mods so this kind of performance was more 'mysterious' and difficult for us backyard mechanics to figure out and achieve. Especially the computer re-tuning part of it. I wouldnt have known where to start back then.

Callaway claims they offered to build another one, at a cost of 300k or 400k (cant remember). In 1988, people were plucking 400k on slower-performing ferrari f40's that were supposed to retail for 250k. So people had the money and would have paid it for that kind of unbelievable streetable performance (think cats, A/C).

The fact that I, a diehard corvette guy, never heard of this car until 1991 is evidence that it was not marketed properly. Had it been marketed properly, especially in the boom-time economy of the late 80s, seems like they could have sold hundreds. Look at the Bugatti Veyron. Ballers, professional sports figures, entertainers, actors, executives, etc. idolize those and have the means to get one.

Had Callaway mass-produced this vehicle, their sales would have continued strong instead of fizzling out as the c4 zr-1 hit the market.
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Old Apr 26, 2010 | 11:26 PM
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Originally Posted by dizwiz24
My only question to the whole sledgehammer project was if it was so great of a car why was only '1' made and why did callaway instead mass-produce the much slower aerobody TT car?

We didnt have the internet to discuss mods so this kind of performance was more 'mysterious' and difficult for us backyard mechanics to figure out and achieve. Especially the computer re-tuning part of it. I wouldnt have known where to start back then.

Callaway claims they offered to build another one, at a cost of 300k or 400k (cant remember). In 1988, people were plucking 400k on slower-performing ferrari f40's that were supposed to retail for 250k. So people had the money and would have paid it for that kind of unbelievable streetable performance (think cats, A/C).

The fact that I, a diehard corvette guy, never heard of this car until 1991 is evidence that it was not marketed properly. Had it been marketed properly, especially in the boom-time economy of the late 80s, seems like they could have sold hundreds. Look at the Bugatti Veyron. Ballers, professional sports figures, entertainers, actors, executives, etc. idolize those and have the means to get one.

Had Callaway mass-produced this vehicle, their sales would have continued strong instead of fizzling out as the c4 zr-1 hit the market.
I think it was because nobody wanted to pay that for a corvette.
And it is a tpi vette so its only worth 6k like all the others's lmao
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Old Apr 26, 2010 | 11:36 PM
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I know the look has been copied, but has the performance?
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Old Apr 26, 2010 | 11:51 PM
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Originally Posted by Hokies83
And it is a tpi vette so its only worth 6k like all the others's lmao
Dude... you have some sort of tpi inferiority thing don't you?
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Old Apr 27, 2010 | 12:00 AM
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Originally Posted by dizwiz24
My only question to the whole sledgehammer project was if it was so great of a car why was only '1' made and why did callaway instead mass-produce the much slower aerobody TT car?

We didnt have the internet to discuss mods so this kind of performance was more 'mysterious' and difficult for us backyard mechanics to figure out and achieve. Especially the computer re-tuning part of it. I wouldnt have known where to start back then.

Callaway claims they offered to build another one, at a cost of 300k or 400k (cant remember). In 1988, people were plucking 400k on slower-performing ferrari f40's that were supposed to retail for 250k. So people had the money and would have paid it for that kind of unbelievable streetable performance (think cats, A/C).

The fact that I, a diehard corvette guy, never heard of this car until 1991 is evidence that it was not marketed properly. Had it been marketed properly, especially in the boom-time economy of the late 80s, seems like they could have sold hundreds. Look at the Bugatti Veyron. Ballers, professional sports figures, entertainers, actors, executives, etc. idolize those and have the means to get one.

Had Callaway mass-produced this vehicle, their sales would have continued strong instead of fizzling out as the c4 zr-1 hit the market.
Ive seen you beat this "poor marketing" drum to death and you honestly have no idea what youre talking about. Even the slower B2k Aerobody TT was still close in top speed to the F40 for $330k+ less money. 191 vs 200mph

You must not have been reading magazines back then. That car was EVERYWHERE.

Are we forgetting the stock market crashed in 87...not exactly boom time. Sell hundreds of $400k cars? Right.

Exactly how does a very small company that builds 100 cars a year market against billion dollar GM? Funny to even think about especially considering they were both selling Corvettes. Go surf eBay a little and look at all the magazine ads and dealer brochures that were available around 1988. Considering the size of the company they did very well.

Callaway cars were and are built to order. Yes they will build a car and use it as a marketing tool, but what private business owner in their right mind would build a bunch of unsold $400k cars and hope they sell? Oh I can think of a big name builder that did......they are out of business now.

Last edited by SurfnSun; Apr 27, 2010 at 07:36 AM.
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Old Apr 27, 2010 | 01:01 AM
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Originally Posted by RedLS1GTO
Dude... you have some sort of tpi inferiority thing don't you?
I agree. I personally love my TPI L98. Value is in the eye of the owner. If he's all pissy he doesn't have an LS1 in his C4, that's his issue. All C4s have engines with pros and cons.
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Old Apr 27, 2010 | 06:40 AM
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Originally Posted by RedLS1GTO
Dude... you have some sort of tpi inferiority thing don't you?
Mine is a tpi im just being an ***.
Because everybody seems to think the value of all tpi vettes are 6k
No matter what shape there in.
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