http://www.digitalcorvettes.com/foru...&postid=155535

 

Staying on my side of the argument of whether the Z06 will have 575 HP or not. With the way things have gone in the past, and are currently going, the LS7 should be an option on the Corvette being the next step up from the LS2, correct? I'm going to assume that the next step up will be called "Z06". Now that means the Z06 gets the LS7. Do you really think their going to put 575 HP for the "next step up" leaving a 150+ HP gap between the base 'vette?! Not to mention that the LS6 only gets 50 more HP than an LS1, what makes you think the LS7 will just be otherworldly from the LS2?

My approximation is 500HP max by production time. Then the Blue Devil or whatever will claim that 575HP figure. Like I said earlier, if you think your going to get a Corvette with 575HP for $60K in the next two years just because the Mustang might approach that #, YOUR DREAMING!

 

I see your point.

About the only time in "modern history" that I can think of a horsepower gap even approaching that in Corvette would be 1990 and 1991 when the base Corvette was still the L98 with 250hp, and the ZR1 LT5 had 375... and that still falls substantially short of the proposed gap by 50hp at a 125hp gap.

In 1992 the gap shrunk from 125 to 75 when the LT1 was released with 300hp.

Then from 1993 to 1995 the LT5 got a hp bump to 405 and re-stretched the gap to 105hp.

So, yes, a 175hp gap seems unrealistic historically, and would be pretty shocking.

 

I'd say that you are correct.

As far as I know......

LS7 will be in the 500 hp range.

 

I don't know about there not being a precedent for a 150hp gap. Look no further than the LS1 F-bodies. They can claim 310hp all they want, but mine laid down 307hp at the wheels. worked out to about 350-360 at the engine, base V6 had 200hp. $5k for 150hp, not bad!

No idea on the Vette though. I know MTI's 7.0 LS1 package is good for about 550hp, w/ no power adders, so who knows. One thing though, I do believe that the LS2 is under rated. Same advertised hp and tq as the LS6, but has more cubes and compression? I believe this same engine in the Chevrolet SS concept had something like 430hp advertised at the time, so 575hp would only be a 145 hp bump, not a 175 hp one.

I guess we'll all know soon enough. I'm gonna do a visit to the Vette Museum this summer, and do the plant tour again..but was told by a friend in the know that they're gonna be running some C6 Z06's down the line, and the plant may be closed to tours...will try to glean some info on the subject when I'm there.

 

If you look at it from percent above base engine.

In 1991 the ZR1 had a 50% above the base Vette

A 575HP Vette would only have a 43% hp over the base C6

I also think the "rated 575HP" number is too high. I think there is a better chance it will be rated at 500-525HP and be underrated from 575HP. 575HP doesn't seem too hard for a 427, all the tuners are getting 550-600HP from the 427s.

THe big question is if the LS7 is a 7.0L will it have 3 valve heads?

 

I was wondering if anybody remembered that For some reason I'm thinking that the LS2 will have a milder cam than the LS6.

 

The LS2 has already been proven more powerful than the LS6. I've seen pictures of the LS2 compared to the LS6 dyno. The LS2 is probably pushing 420-425 at the crank. I'll try to find those pictures again to show you guys.

Last I heard Chris Rowe from Z06vette.com actually DROVE a preproduction C6 when he met Dave Hill and the design team in public and I believe they said they were having a little trouble nailing 500hp. http://www.z06vette.com/forums/showthread.php?t=58790

EDIT: Found the pic. http://64.81.147.40//modules/gallery...50&id=P4237723

 

thats an interesting graph. i love how flat the tq curve is. it is so nicely shaped that it leaves me to assume that the engine has tons more potential with certain comp. tuning and such

 

Yup, thats why I said 150+HP instead of 175.

That dyno sheet looks really nice though, I like how the torque line in the LS2 just shells over the LS6 HP looks about the same to me

 

ALL LS1 engines made about 350 horses (give or take a few) the final few years. This includes Camaros, Corvettes, or current GTOs. Camaros were cammed for lower speed torque over the Corvette, and the GTO is cammed for lower speed torque over the Camaro.

It doesn't matter if they were base $23,000 Z28s, or $31,000 Camaro SS'. Chevy lied on the ratings for the Camaro SS guys, not the Corvette buyers.

 

Are you saying the SS cat-back didn't add any HP

 

well, it makes more sense if you look at % difference. like darth was saying, a bas vette with L98 had 250hp? and the ZR1 had 375hp. the L98 had ~66% of LT5's 375hp, or the LT5 is 1.5 times as powerful as the L98.

now lets look at the LS2/LS7. LS2 has 400hp (rated) and the rumored LS7 to have 575hp. doing the math we see that the LS2 has ~70% of LS7's 575hp or the LS7 is 1.44 times as powerful as the LS2.

my point is that the bigger the numbers get the more the percentage difference matters over the actual difference. lets say we consider 50hp to be a good bump from 250hp to 300hp. that's a 20% increase. but what if we add 50hp to 500hp? the difference is not as drastic, only 10%. add 50hp to 1000hp... a bearly noticable 5%.

so I think it's possible the LS7 could have well over 500hp.

 

Ssssh! Don't tell the SS-crowd.

 

...And how much was a ZR1? $70+K ?? By inflation, probably over $80K.