Just ran into this. It's on the hennessey website. That is a nice *** tq curve.

http://www.hennesseyperformance.com/...Pic4.php?id=52

Stock #'s are 515.1rwhp and 481.2rwtq. Not bad. Nowhere the 560rwhp that was rumored awhile back, but nice nonethelss. This is also one car/test. Numbers could be below average, average, or above average for all i know. Anyone else seen other stock figures?

 

835 miles on the odo... I'm sure it could improve quite a bit with some miles. But not 45rwhp that it'd need to match those #s.

What about the new Z06, what did it dyno at again?

 

515 RWHP is ~565-575 at the flywheel.

 

Right but from what I gathered, he's saying people were saying 560 rwhp.

 

That was the rumor that was flying around a year or so ago. Rumor was that Roush or someone dyno-tested one and got like 550-560rwhp. This was before production started though and so it could have been a pre-production model. Either way, that was the rumor flying around a year or so ago.

Engine is still relatively new and going through the break-in process and so it should still have a few more ponies to gain, but nothing significant like you already mentioned.

Either way, the #'s are pretty solid.

 

3150 lbs. I have a pull out from a mag when they ran a story on it.

I think the Ford GT is like 3500 or so.

 

A guy here from Bahrain ordered one. I was at the pier when he picked it up. We both looked it over and I must say it's a work of art. You cant imagine what he paid for it.

 

"But what if it had a pulley..."



I'm the funniest guy I know...

Nice showing from the blue oval camp though.

 

Naw more like 3200 to 3300 lbs, there is only about a tenth difference in the power to weight ratio of Z06 and a Ford GT with the Z06 being the better of the two and with better aero and less weight, ergo it is the faster car.

In the GT's defense it wasn't about being the best, rather it was about generating excitement, however since it is an expensive rolling advert for Ford (unfortunately a flawed one), it had to post the numbers.

Interestingly The orginal GT's (GT40 being a nick name derived from its then measured height of 40 inches) had aero problems too, They would get light in the tail and spin out IIRC, until a ducktail was added to generate down force, but the GT did what it need to do back then and that was put the smackdown on Ferrari and claim a manufacturers racing cup. These cars were very sucsessful and lived a long long life in racing until Porsche came along with its two ton gorilla. If anybody thinks that the Ford GT's predecessors are insignificant, go and check out the used car market for the GT40.

 

so true on both accounts..

 

That's a monster. Good job Ford for having the b@lls to put out a car with so much hp/tq stock.

I hope the jaggy curve is a function of the dyno used, and not the engine. Maybe they didn't use smoothing on the dynojet.

I'm a fan of making a lighter car, and not needing quite as much HP to get the same performance. The handling is better that way, all else equal.

Dan

 

Ford GT - 3,489 lbs
Z06 - 3,147 lbs

 

Using the numbers above, and a weight of 3150 for the Z06 and 3500 for the GT, you get the following:

GT: 3500 lbs / 515 RWHP = 6.80 lb/HP
Z06: 3150 lbs / 445 RWHP = 7.08 lb/HP

I haven't seen drag coefficients for each, so I can't comment on the aero. However, GM claims a drag limited 198 mph for the Z06, and from C&D about the GT: "The projections in Dearborn are for more than 200 mph. Considering how mightily it was accelerating at 170 mph (it got there in only 23.0 seconds), we'd have to say Ford is right."

It would be interesting to hear if anybody had actually gone out and found the top speed limits of each.

 

I would think the if both cars were involved in a raw top speed battle, that the GT has it on the Vette, due to its higher raw power rating. How much does power-to-weight actually affect your ability to accelerate at those kind of extreme speeds?

The C6's coefficient of drag is .286, but I believe the z06's is .34, due to the wider tires and body work to keep the car planted and such. I have no idea what the Ford GT's coefficient of drag is though, although I thought I remembered reading a long time ago it was .38, but that was a long time ago, so I would highly suspect it got brought down quite a bit from that.

 

These are the numbers from the automobile mag article BTW. They had the Viper at 3454 just for comparison's sake.

GM really nailed the total package w/ the power, weight, and gearing w/ the Z06. It oughta get it's assed kicked by the GT on paper even w/ the weight, yet it appears to at least hold it's own... Quite impressive.