Quote:
Originally Posted by Jamestwilliams
You could put the same money and get even better results from the ZR1 it is already supercharged. Besides both cars are now within tenths of a second of each other on the nurburgring so they are even (ps the ACR not the SRT10).
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I don't think the ACR is really even on the same field as ZR1 though. Isn't that car like stripped and what not? I'm sure GM could find the few more tenths it's lacking in a few more laps and get to at least the same speed as the ACR. Still, I'm not taking away from that car because it's just plain cool.
Quote:
Originally Posted by gtahvit
OK I'll jump in the fray here.
And the answer to the "just bolt on a blower to a viper" isn't quite that simple.
The compression ratio is so high in the viper that you might be able to run 4 pounds of boost. for about 10% to 20% gain. So lets say its 20% for a grand total of 750HP approx. A blower for the Viper is gonna run about 10K if we are lucky.
Meanwhile, the ZR1 is already a blown motor that is more than capable of handling near 20lbs of boost. For about, meh, 100 bucks. Now the ZR1 is well into the 800hp range.
That's the problem with NA. It is allready maxed out. Where as the LS9 begs for more boost. GM just doesn't need more. But there is plenty room to grow. Room that you don't have on a NA high CR engine. GM already learned this lesson with the LS7.
FWIW.
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Shoot; even though Magnusun doesn't make the blower for either the LSA or LS9 I think I still may have some validity: The LSA uses the 1900 blower and Magnusun rates the same size 4-lobe blower to something like 800 horsepower (I haven't read what's claimed for the 2300 in the ZR1). My point is that I think that ZR1 could reliably live in the range gtahvit said. I know the engineers said that the LS9 is at it's limit now but I don't recall exactly as a result of what. It has a completely forged bottom end, bigger head bolts, stronger heads, and a load of other stuff. I'm sure adding long tubes, a different pulley, CAI and catback would get another easy 'hundred horse' out of it. Still, the point about adding FI to the Viper would just be stupid-power, but I don't think a comparison between an NA motor to an FI motor is quite representative.
Either way, it looks like Dodge may have underrated the car a little
