Lifted07Sierra

Are there no dyno numbers yet? Or have there been some already and I just missed it?
Im surprised we don't have dyno tuned numbers yet with exhaust and CAI

talon90

C7's are on the road with GM executives and development drivers with captured test fleet vehicles. These are not private owner cars.

Lifted07Sierra

I see, I know its somewhere on here but when does delivery to public take place?

C7pimp

Give it a few weeks and we will be seeing all of this. We will see dyno #s in the 440-450whp with a few bolt ons and a retune.

Lifted07Sierra

I may have to venture back towards a vette next year if a tune, full exhaust and intake can get this car to 500rwhp and then throw some E85 mix in there and hope to see 530rwhp?

z51vett

Look at vin numbers these cars will more than likely be used for crash testing and such.
Doubt they will make it as used company cars to be sold.
z51vett
Doug

michaelinmech

500rwhp would require a 100hp or more increase over stock. Doing so with a tune, exhaust and intake is probably not realistic.

As to the E85, it does not always increase horse power, so 530rwhp on E85 is even less realistic, imho.

Why is your minimum requirement 500 to 530 rwhp to consider a Corvette next year?

SCM_Crash

Um... What?

E85 DOES increase power as long as the car is tuned for it. E85 is more explosive than E10 and E0. It also burns cooler which means means there can be more timing. There's also 20-25% more fuel used, also increasing the amount of explosion in the chamber.

michaelinmech

I was responding the OP's words "then throw some E85 mix in there" - and my point was that simply by using E85 you are not guaranteed a HP increase - the engine management system must be 'tuned' for it to make a difference . . . .

SCM_Crash

OH! OK...

Yeah, without proper tuning, you're going to have a bad time.

dcbingaman

You guys may be forgetting about the mass flow limits of the stock DI fuel system....at 2000 psi this is not trivial. To get just the same heat release of E85 vs. regular gasoline, the mass flow capability of the fuel system has to increase by a factor of 1.6. To get MORE HP, it goes up from there. My guess is, that capacity ain't there now.

Getting significantly more power out of the DI motor will probably require a significant modification to the fuel system, or possible a hybrid DI / port fuel injection scheme. It won't be trivial.

Same for forced induction - the fuel mass flow has to increase at least as fast as the airflow or no more power. This is the elephant in the room for Callaway, Lingenfelter, Hennessey and everyone else. It is certainly possible, but it ain't gonna be cheap.

RocketGuy3

There's more fuel used because ethanol has a lower energy density than petrol. From my understanding, you may be able to get more power from a comparable E85 motor, but you'll be going through a lot more government-subsidized gas doing it.

JerriVette

I'd imagine a increased capacity for fuel would be available from the higher performance model about to be shown this January in Detroit...

Hopefully if needed on a modded c7 z51 ......taking a look in gm s parts bin should do the tricks...

If increasing fuel supply becomes necessary for heavily modded c7 s...

dcbingaman

I hope you are right - if you can buy an entire OEM system to replace the current one, it should be a lot cheaper and more reliable than an aftermarket system. ANY gasoline leak in a 2000 psi system could be a REAL mess in a hot engine compartment.

On the other hand an Eaton 2300 blower on this thing should be pretty straight forward. I'd rather buy mine from Lingenfelter, but if Hennessey can offer 600 HP for $12K and warrantee the thing for three years, that sounds like a pretty good deal to me.

Of course, what the Hell I would do with 600 HP when the thing is apparently an animal with the stock motor, I don't know. I don't intend to track the car, but in the words of the great philosopher Mick Jagger (Rolling Stones), "Too much is never enough !!"

SCM_Crash

There's a difference between power density and energy density. You can have more power density and less energy density. The two are mutually exclusive (for the most part) and always depending on the medium.

Meaning, E85 carries less energy than gasoline, but the power density it has during ignition is higher. E85 has a far more violent explosion than gasoline.

As far as the "government-subsidized" gas thing, that's not the point, nor does it matter... Unless you were just adding that in for a cheap shot.

In any case, if you knew you were going to run on E85 only, you could build the motor to use just as much fuel as a E0 motor to move the car the same distance. We don't because we don't have the infrastructure for E85 so one of the fuel types has to suffer. But the reality is that E85, when used in a motor specially designed for it, will burn just as much fuel as gasoline to do the same work. The only difference is that the E85 engine will do it with a smaller C02 footprint.

z51vett

While you argue about the e85 why did the corvette race team running e85 request and get a larger fuel tank to off set the loss of mpg?????
z51vett
Doug

Mike Mercury

because it takes more alcohol to get proper combustion - than gasoline.

the Stoich AFR of 100% gasoline is 14.7:1

the Stoich AFR of 100% alcohol is 9.0:1

ChucksZ06

I like how engineer types never admit they were wrong but just introduce more extraneous info into the discussion. The car won't hook up with 500whp anyway and 90% of the weenies who post on here never go over a 100mph anyway. It is just an expensive tape measure for insecure guys.

C7pimp

The thrill of a high horsepower car is something everybody enjoys. I've had people that ride in my car become an instant fan of speed once they taste what a 550hp 11 second car feels like. Before that, they couldn't care less.

"small-*****" individuals like to have an extremely powerful car because it's fun and exhilarating, not because they necessarily like to show off or feel the need to shadow some sense of personal inadequacy.


I drive fast cars because I like it, not because I want to impress people.


And lol @ you for saying that when you drive a Z06.

Lifted07Sierra

I'm in car driving home but reason I'd want 500rwhp is because my 335i is roughly around that with a ton of torque down low.
My 2000 Vette got up to 428/415 roughly but that took heads and mild cam.
I know 500 may be a stretch without a cam but I see them getting to 475rwhp with full bolt ons