My thoughts. If the ZR1 only comes out at 620 horsepower, why not just make some adjustments to the current 427, get the horsepower over 600 and voila, we still get to have 3100 pounds instead of 3350.
My car dyno'd at 483 RWHP with a tune and no filter. I'm guessing that with a cam and a few other mods, the 427 is easily 600+ at the motor.
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Performin' Norman
My thoughts. If the ZR1 only comes out at 620 horsepower, why not just make some adjustments to the current 427, get the horsepower over 600 and voila, we still get to have 3100 pounds instead of 3350.
My car dyno'd at 483 RWHP with a tune and no filter. I'm guessing that with a cam and a few other mods, the 427 is easily 600+ at the motor.
For the same reason people went nuts over the C6 Z06 even though the C5 Z06 could be modded, for less money, to match performance. Factory warranty, bigger tires, bigger brakes, and bragging rights that you drive an exclusive $100k+ Corvette (if that matters to anyone).
I guess it's worth it to some people. So I take it you're no longer interested in the ZR-1, Norman?
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I think they went with the 6.2L to give themselves room for growth. That way they can progressively increase liter size and get much more hp down the road.
can your modified motor (ie, "I'm guessing that with a cam and a few other mods, the 427 is easily 600+ at the motor.") pass, at the least, these requirements?
Quote:
The LS9 won't be getting its final certification until about March, but so far GM has put over 6,800 dyno hours on the new engine. They have run an engine for 100 hours continuously at wide open throttle and done both simulated and real 24-hour track cycles similar to what the GT1 C6.Rs run on the dyno and in the car.
i suppose if it doesn't, then it's not your fault, but GM's for not making an engine robust enough, right?
For the same reason people went nuts over the C6 Z06 even though the C5 Z06 could be modded, for less money, to match performance. Factory warranty, bigger tires, bigger brakes, and bragging rights that you drive an exclusive $100k+ Corvette (if that matters to anyone).
I guess it's worth it to some people. So I take it you're no longer interested in the ZR-1, Norman?
No, you misunderstand. I was talking about Chevrolet doing this on production cars, not me modding my own car. In an effort to keep the weight down, they could have accomplished the same performance by just modding the existing 427.
Sorry for the confusion.
To answer your question. I am less interested since the info came out. I am number one on the dealers list at the largest Corvette dealership in kc. Only time will tell.
they could have accomplished the same performance by just modding the existing 427.
It wouldn't have been possible given the cylinder wall thickness and spacing as Tony Skarbic alluded to. In addition, emission and durability standards would also be impacted.
Ask Katech, the people who build the C6R engines, what more GM could have done to the LS7, but still kept it 50 state legal.
GM didn't leave much on the table with the LS7. Although a tune can unlock some more power, it's at the risk of increased cylinder head temps (due to leaning the AFR), among other things.
As I've said before, fewer cubic inches and forced induction is the wave of the future. The LS9 is just the start. We already know most of the future LSx engines outlined thus far are slated for supercharging. It's the only way to get the horsepower and still meet future C.A.F.E. and emissions standards.
It wouldn't have been possible given the cylinder wall thickness and spacing as Tony Skarbic alluded to. In addition, emission and durability standards would also be impacted.
Ask Katech, the people who build the C6R engines, what more GM could have done to the LS7, but still kept it 50 state legal.
GM didn't leave much on the table with the LS7. Although a tune can unlock some more power, it's at the risk of increased cylinder head temps (due to leaning the AFR), among other things.
As I've said before, fewer cubic inches and forced induction is the wave of the future. The LS9 is just the start. We already know most of the future LSx engines outlined thus far are slated for supercharging. It's the only way to get the horsepower and still meet future C.A.F.E. and emissions standards.
still though....GM could have just put a cam in the LS7 and get 100 more hp and call it day, obviously....i mean, nevermind r&d, testing, driveability, etc....i just like to talk out of my ass is all.
It wouldn't have been possible given the cylinder wall thickness and spacing as Tony Skarbic alluded to. In addition, emission and durability standards would also be impacted.
Ask Katech, the people who build the C6R engines, what more GM could have done to the LS7, but still kept it 50 state legal.
GM didn't leave much on the table with the LS7. Although a tune can unlock some more power, it's at the risk of increased cylinder head temps (due to leaning the AFR), among other things.
As I've said before, fewer cubic inches and forced induction is the wave of the future. The LS9 is just the start. We already know most of the future LSx engines outlined thus far are slated for supercharging. It's the only way to get the horsepower and still meet future C.A.F.E. and emissions standards.
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I know I've always revered the rule "no replacement for displacement"..but there's method to the madness. With a 6.2L motor...smaller cubes, they can twist this motor higher into the RPM range. Coupled w/the supercharger which makes the power band that much broader..so another words..w/the roots type supercharger, she's making power down low..Hence the "axle's on a more horizontal plane and steep 1st gear to launch the car" as they stated. Then twisting the hell outta the smaller cube'd motor, means she's still pulling hard up top....where most roots type superchargers will start to loose some efficencey..
Make no mistake..aside from some cosmetic differences and a stupid name...
THIS CAR WILL BE A PERFORMER!!!!
I'm sure the "power guys" at GM have pushed the limits w/pulley changes etc. etc..this LS9 has already seen 800HP!!! I gaurantee it...
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Last edited by SonOfaDragRacer : 12-21-2007 at 09:57 PM.
still though....GM could have just put a cam in the LS7 and get 100 more hp and call it day, obviously....i mean, nevermind r&d, testing, driveability, etc....
.... and never mind all the things that have nothing to with power, but still help it be a faster car, like better suspension, brakes that won't fade after a few laps, and so on. There's a word for what happens when you just add power and nothing else: Mustang. And there's nothing I love more than watching little 190 HP Elises eat 500 HP Mustangs for breakfast on sheer handling ability alone.
("But, but, but, .... the Mustang has more HP! It *must* be better!")
I think GM could have achieved more horse power from the 427, however as I recall, at 505HP they were having problems meeting the government fuel mileage standard set for the car.
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And there's nothing I love more than watching little 190 HP Elises eat 500 HP Mustangs for breakfast on sheer handling ability alone.
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