[OBI_agent]

If it seems odd that John Hennessey, owner and founder of Hennessey Performance Engineering, is now also tuning Japanese cars, let us remind you that he got his start tweaking Mitsubishi 3000GTs nearly 20 years ago. And it was clear after driving the Hennessey GTR600 that he's still familiar with Japanese cars.

The first thing Hennessey worked on was on the twin-turbocharged V-6. The factory turbochargers were modified with new 47-mm compressor wheels, with boost set at 17 psi. There's also a long list of new parts (under the company's SUMO brand) that includes the exhaust system, ECU, intercooler piping and wastegate actuators. All this results in 642 bhp at 6400 rpm and 611 lb.-ft. of torque at 4500 using premium gasoline (Hennessey claims that it'll pump out 700 bhp with racing fuel and boost turned up to 21 psi)

And man, does this make a difference at the dragstrip. The launching system limited engine revs to just about 2700 rpm with VDC on or off. Take your foot off the brake pedal, and you could swear the GTR600 is about to go airborne as it leaves the line. The GTR600 hit 60 mph in a scant 2.9 seconds and reached 100 mph in 6.5. The quarter-mile mark goes by in10.8 sec. at 130.4 mph. Hard to believe, but this thing made the GT-R SpecV feel slow...With race gas and the boost turned up, the GTR600 hit 193.8 mph in the standing mile, said Hennessey, and it hit 150 mph in just 14.3 sec.

Hennessey GTR600
List price $118,090
Curb weight est 3900 lb.
Wheelbase 109.4 in.
Length 183.3 in.
Height 52.9 in.

ENGINE
Type twin turbo alum. block dohc V-6
Bore x stroke 95.5 x 88.4 mm
Horsepower 642 bhp @ 6400 rpm
Torque 611 lb.-ft. @ 4500 rpm
Redline 7500 rpm
Fuel injection elect. sequential port
Recommended fuel 100-octane race gas

CHASSIS & BODY
Layout front engine/awd
Body/frame unit steel
Brakes 15.0-in. vented discs
Wheels forged alloy, 20 x 9½ f, 10 x 10½ r
Tires Bridgestone Potenza P255/40RF-20 f, P285/35RF-20 r
Steering rack & pinion, vari pwr assist
Suspension upper & lower A-arms, coil springs, tube shocks, anti-roll bar/multilink, coil springs, tube shocks, anti-roll bar

PERFORMANCE
0-60 mph, sec. 2.9
0-100 mph, sec. 6.5
1/4 –mile, sec 10.8 @ 130.4
Braking, 60-0 mph 114 ft.
Braking, 80-0 mph 201 ft.
Speed thru 700-ft. slalom 73.2 mph
Skidpad, 200-ft. circle 0.97g

Tweaks

* SUMO Stainless Steel 88 mm Catback Exhaust System
* SUMO Stainless Steel Midpipe Exhaust
* SUMO Engine Management Computer Programmer (17 psi boost)
* SUMO Intercooler Piping Upgrade
* SUMO Inlet Piping Upgrade with Stainless Steel Blow-off Valves
* SUMO Sport Turbo Upgrade – Modified Factory Turbos with 47 mm Compressor Wheels (stock compressor wheels = 42 mm)
* SUMO Modified Factory Wastegate Actuators
* Professional Installation
* All Necessary Gaskets & Fluids
* Chassis Dyno Tuning & Engine Management Calibration
* Limited One Year Warranty
* Powered by Hennessey Custom Floor Mats
* Limited Edition GTR600 Plaque in Interior & Engine Compartment
* Factory Engine Cover in Red with black GTR600 Badges
* Hennessey & GTR600 Exterior Badges

GTR600 Upgrade -Total Installed Cost: $24,500

Options (prices include installation):

* SUMO Electronic Exhaust Cutout (75 mm): $1,500
* KW Variant 3 Adjustable Coilover Suspension Upgrade: $5,500
* HRE C91 Light Weight Alloy Wheel Upgrade (set of 4): $7,300


Total Cost of Options $14,300

Total Cost of GTR600 Upgrade & Options As Tested $38,800

Read the whole article
Roadandtrack

[c0nstant]

id like to see them take that in for service

[Garduna]

It was 2k for a regular service right? I'd give it an additional 2k if it really did go in for one :P

[vgame64]

Nice car, though I don't like the wheels.

Also, I was under the impression from the internet that Hennessey was not to be trusted as he would sell parts from peoples cars and do other scummy things.

[hottoddyo]

I'm not a big fan of the rear end of the GTR. I'd take one though!

[vAnt826]

Originally Posted by vgame64

Nice car, though I don't like the wheels.

Also, I was under the impression from the internet that Hennessey was not to be trusted as he would sell parts from peoples cars and do other scummy things.

That was years ago and since then he has been shown working hard to build back his rep.

[Spec 1]

I am a big fan of the Hennessey cars. Very classy and subtle design schemes and monsterous engine's coupled with racked-up suspensions.... I'd love to own one of his creations someday, though not the GTR.

[canucklion]

I've came across the same story, but could you elaborate on what happened in the past?

edit: fount this
http://www.sportbikes.net/archives/f...ad.php?t=62350

Originally Posted by vAnt826

That was years ago and since then he has been shown working hard to build back his rep.

[MJC///M3]

thats intense

[ragingclue]

That's kinda fast. Maybe now the GTR can outrun its ugliness?

[BoostedBMW]

That's just insane! Looks good too. Honestly though, after driving the GTR, I don't really care how much power it can crank out... it feels really disconnected overall IMO.

[Year's_End]

omg that's almost veyron territory.

btw, nice thread setting-upage.

[montreal red]

wow ... impressive.

[E82tt6]

Sweet, 131 MPH traps, that's on par with a stock ZR1!

This should have been the spec-v, in terms of power.

[Boost Gomez]

Interesting..

[OBI_agent]

Originally Posted by Bimmer Loyalist

omg that's almost veyron territory.

btw, nice thread setting-upage.

Lol bro....so you noticed.....you were my inspiration ....!

Originally Posted by E82tt6

Sweet, 131 MPH traps, that's on par with a stock ZR1!

This should have been the spec-v, in terms of power.

+1.....I totally agree....this should have been the specs for the upcoming spec -V....instead what do we get....a 130 pound lighter car with boost control for 80 seconds that only increases the torque

[PKumarM3]

GTR is a fail

[BForbes]

Originally Posted by PKumarM3

GTR is a fail

LOL...not anymore. They fixed that issue and its just as fast. Awesome video though.