Cadillac hot rod pushed to 220 mph

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Texas tuner John Hennessey's work on big Detroit iron has its acolytes and detractors, but the man knows how to show off his wares. To highlight the top-speed performance of some of his big rigs, Texas authorities let him take a full-speed blast down the state's newest toll road outside Austin that opened today, one that features an 85-mph speed limit. It's just long enough for the 1,200-hp, twin-turbo Cadillac CTS-V coupe to hit 220.5 mph. :wacko:

Hennessey told Jalopnik that the stunt came about after a conversation with state officials and an offer to test out a toll tag system to see if it could accurately report fines at triple-digit speeds. In addition to his 1,200-hp CTS-V coupe, Hennessey also brought a 707-hp Chevy Camaro ZL1 that managed to hit 203.9 mph along the same strip, with an even better sound. Hennessey says the CTS-V might have done 230 mph had he been granted another mile of tarmac.

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Great idea! Neat way to advertise both for the car and new ticketing system.

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Richard C.

707bhp just to go 203 mph? Cars with 500bhp have done 217mph :p

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you have to remember, these are american cars, lot of power for smaller performance increase

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That's a little bit faster than I'd like to go.

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  • 6 years later...

This same system is in use in a lot of the US - it was originated in Canada (ETC407, to be specific).  We use it in Maryland (MD200 - the state's first all-electronic tolling facility) as well.  That it can hold up at the upper limit simply creates more uses for toll facilities.

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Jim K

Holy necro Bat-man



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