jschindler

GM uses the SAE Certified method of rating them. BTW, I am not convinced that BMW does under rate them. I have read that for years. I think they are just good at setting the cars up right (gearing, transmission etc) and likely have less losses. Performance figures are actually very much in line though today with other cars of similar HP and size. If anyone is under rating today it's Audi.

RC000E

I have a question....

If you had to guess...

Given all circumstances equal (weight, aero, tires, driver, etc) which of the following would you project to be faster in the quarter mile?

A C7 corvette with a 480hp LS3 or a 450hp LT1?

Which do you project would be faster on a road course?

ArcticC7

I think if they knew the real final numbers they would have said it at the Bash. They also may be having issues with the new motor and are waiting for fixes to come online before they are willing to certify it. I was hoping for 480 but all this silence its looking more like 460-465 to me.

Hemi Dave

I highly doubt that

....You are probably hoping for 280 HP with massive engine failure..........


By Torch2013c6:

"Lets see if I buy. 2013 I save $20K in discounts over a C7. Im also able to buy a convertible and not have to wait another 11 months. my payment will be $300 less a month with the. C6 My 2013 will have 20hp less than the C7 (about as much as a lawn mower) The way I see it if you don't buy a C6 right now your not very smart.

Thats why I ran and bought my 13 Vert for 46K. In laughing all the way to the bank now.

Picked her up last week in Ohio. $46K out the door! Now is the time to buy folks!

Keep it and thank the Lord I got a fantastic deal on my 2013 convertible that has a rear end treatment that looks like a Corvette and is totally proven. Then I will also not look like a fool who purchased a first generation model year Corvette who over paid for a car that will have quality issues no matter how many times the car is laid up at the dealer for recalls and adjustments. In 2016 once the car has been proven and the bugs worked out I will purchase a C7 convertible and trade the 2013 in for it.

Left over? If its a 2013 its not a left over.

I just tried buying a GS vert from them and I could never get them to respond or send me a buyers order. Here I am with 55K in hand and they are ignoring me. I went elsewhere.

I only buy base Corvettes lets see I think its 21 of them to be exact. Its a sports car not a Cadillac.

Well you might have hit on something here. Brain washing is exactly what Tadge is trying to do by saying C7 makes C6 obsolete. Its like a bunch of Lemmings...well you know how the story goes. I don't need to be part of the "in crowd" all I need to be is smart with my money when it comes to my Corvette purchases.

Just so you know, buying a first year Corvette and paying full list for it is about the dumbest thing anyone can do. I did it once and learned my lesson well. My C7 will be a 2016 model nice and refined with a discount for less money than most paid for a 2014. In the mean time I will drive and enjoy my brand new 2013 until then.

When you actually own a C7 then come and impress us "with all its technology" Keep in mind Mr. Goodwrench will be ready to take apart for the first time and experiment on your new C7 if "all the technology" starts acting wonky.

We don't even know that the C7 even works well so how can you say its dramatically improved? You know something I don't or have you been listening to GM rhetoric/propaganda again?

GM is great for making promises but IMO never really delivers what they set out to achieve. Take the SSr and the XLR for example."


I will also add you said the C7 makes you vomit..........

Al77Vette

More than likely 450- 455 will be the number until you turn the **** on the center console to “Track” mode which should adjust the spark and fuel curves. Then 460 -465

Big Dan 427

A) I'm not sure why the question RC
B) I honestly think it would be darn close, too close to call

tomzarbo

Agree with you 100%.

For me, I'll take a nice fat bunch of torque over high RPM horsepower any day on the street.

You can't really rev the Vette much past 4k before you start attracting attention anyway.

Keep the revs low, grunt that thing down the road and lay low while you're doing it.

I'm excited about the new Vette, and I hope to own one in a few years; probably used, but possibly new if Kerbeck can discount these like they've discounted the C6's.

TomZ

C5Z

The L88 was rated at 430 HP, which was an accurate rating of HP in factory tune about 1000rpm below peak power production. Actual L88 engines have been fine tuned and dyno'd up to 560 hp at peak. Chevy manipulated those numbers to conform to government regulations, insurance companies, and Chevy's own horsepower policy.

ArcticC7

Boy you have issues don't you? And you own what kind of Corvette again?

DAFFYDRUNK

I think 470 or around 400 rwhp. No way it will spin to 7k rpm. The DOD/AFM stuff makes the valvetrain weaker so it will max out around 6500 rpm.

Big Dan 427

That is the answer I sort of knew but didn'y know exactly how to convey it. Thank you!!

red2012

Hey Dan;The engine you're referring to was RPO ZL1, an aluminum block 427 offered during the '69 model year only. The cost was $4718 (base price on a '68 coupe was just $4781) and only two were built. Factory rating was 430 hp but the actual number was much higher. More like around 550.

michaelinmech

Boy you have issues don't you?

Why don't you knock it off with them negative waves. Why don't you dig how beautiful it is out here? Why don't you say something righteous and hopeful for a change?


And you own what kind of Corvette again?
He has his deposit paid and order in on the new C7 - the car you exclaim only fools buy, will be full of bugs and broken, is only for the in crowd of lemmings and is purchased based solely on rhetoric and propaganda.

JoesC5

L88(iron block) offered in 1967, 1968 and 1969 was rated at 430 HP.

Turbo6TA

You know, back in the 60s, the manufacturers rated the engines using the SAE standard J245 and J1995 rating system (Gross HP), which calculated the output of a 'bare engine' on a test stand with no accessories, free-flowing exhaust headers without mufflers, optimal ignition timing, and with a correction factor for standard atmospheric conditions.

Much different than today.

A 400 HP rating from the 60s would likely be rated around 350 HP at best by using todays SAE standard J2723 rating system.
_________________________

Of course, as someone else mentioned, a few of the performance big block engines back in the 60s were actually underrated by the manufacturers, so there is no way to tell what they would be rated at today except to put the car on a dyno and get real-world RWHP numbers.

red2012

Yes true but I was referring to the all aluminum motor the ultimate L-88.

michaelinmech

As stated the ultimate 427 was the ZL1 all aluminum motor

ArcticC7

You can count on the 2014 model year to be the most unreliable of the platforms 7 to 8 year life span. Its just the way it works im afraid. I have been there in 1997 and 1998 the 1999 was a totally different car. C7 will be not much different GM counts on its paying customers to shake down the cars so the third model year buyers get a good one. You'll see.

Shurshot

Truthfully the L88 @ 430 was rated less than the L71 @ 435 mostly to discourage the average "wannabe race car driver" customer from getting one. That and the no heat or radio only added to what those in the know did not care about when it came to ratings, but wanted the L88 for what they knew about it

Had GM rated the L88 at a higher HP number than the L71 was rated at a lot of people would have bought it just because it was rated to be the baddest, and in doing become a headache for GM and themselves

Turbo6TA

Shurshot ... The 426 Hemi was underrated too at 425 HP.

But again, the rating system back then was nothing like it is now.

Fact is ... A 426 Hemi Cuda will make less RWHP on the Dynojet than a 436 HP / LS3 Corvette.