Hennessy Introduces ZR700 Package for ZR1 'Vette

If you're a highly imbalanced individual who owns a ZR1 Corvette, there's good news!  Since 638 horsepower and 604 lb-ft of torque in a 3400lb car clearly isn't enough, Texas tuner extraordinaire Hennessey Motorsports has come out with two new tuning kits for the supercharged LS9 'Vette.

The kit  includes the basic upgrades for a supercharged engine.  The 4-lobe Eaton supercharger is cranked from 11 psi to 14psi via a smaller-diameter drive pulley (which increases the speed of the blower) as well as a reworked intake duct for better flow.

Heat is battled with a larger air-to-water intercooler core, and exhaust gases exit through free-flowing 1 7/8" stainless mandrel-bent headers, midpipes and high-flow catalysts.  Hennessey also recalibrates the ECU to accommodate the changes, and fits a K&N air filter for good measure.  (Come on, Hennessey - we all know those don't do anything.)

The bottom line on this basic bolt-on kit: 705 crank horsepower and 717 lb-ft of torque.  Hennessey says the car will top out at 212 mph, and run the quarter mile in 11.03 seconds @ 136 miles an hour. That's the kind of speed that will get you thrown off a drag strip if you don't have a roll cage installed - with basic bolt-ons on a mostly stock, production car with a warranty.  Insane.

Now, I know what you're thinking: "Prove it!"  Well, to you Hennessey says:

these simple bolt-ons produce a gain of 51 horsepower at the wheels, which is pretty impressive.

Hennessey has also released various videos of the ZR700 upgrade, which are awesome enough to embed them here.  Here's the 707-horsepower Hennessey on the rollers, showing all those Hondas that one camshaft is more than enough to lay the power down.

and here's the ZR700, ripping off that aforementioned 11.03@136 run.  Jesus, that's fast.

If that's not enough (search your heart, you know it's true), there's a "ZR750" package that's coming out after the basic package.  On top of the ZR700 upgrades, this kit also includes a stronger gasket for the blower, further ECU revisions that bump the rev limit up to 6600 rpm (200 higher than stock) for a wider powerband, gas-flowed and ported cylinder heads, and to top things off, a high-lift, long-duration camshaft.  Hennessey claims this motor makes an astounding 755 horsepower as well as 730 lb-ft of torque - nearly 1000Nm.

No pricing has been announced on these monster Chevy's yet, but considering a ZR1 starts north of $100,000 here in the US, don't look for a lot of change back from $150,000.  The kits can be installed by HPE  in their facility in Texas, or mail-ordered for self installation (if you're up to that kind of thing), although you'd miss out on HPE's custom dyno tuning that comes with the kit.