bigwoolyg

I Wonder what % of vettes actually make it to 100K miles in their lifetimes.

vetteLT193

Red line is almost never right at peak HP. It is set just a bit above it so you can rev through peak power to make use of all of it AND get right back into it after shifting. If you set the redline at peak HP then you would end up dropping far below peak power after shifting.

If this chart is real then it's going to be a higher than 6600 rpm red line. 7000 or possibly higher.

CPhelps

That's the same graph that was in the SAE paper discussed a while ago. My thinking is that it is from before the certified testing since it was on the paper written about the design. Additionally all the graphs I've seen from SAE certification have the SAE certified logo. It is likely that the testing produced similar numbers though, so I expect the final numbers to be very close to this.

travisnd

Some of you guys clearly don't road race or drag race much. You don't want to shift at peak power. You want to shift after peak to maximize area under the curve. For road racing having additional RPM range allows you to extend a gear and not waste time shifting. There are cases where we'd rather let the car bang the limiter at the end of a straight vs. making a shift.

My guess is the 6500 is all marketing misinformation... The car will have 465 horse with a 7000 rpm redline and a massive torque curve.

Remember... the tachometer is electronic... they can make it say 12,000 if they want.

sam90lx

Sure I understand that but some I believe thought peak power was going to be made at 7k+

RocketGuy3

465 would be disappointing, but I'll wait until we get final performance figures before I pass judgment. I really hope the 475 rumor with 7100-RPM redline is true... Yes, 10 hp isn't much, but your hopes have to lie somewhere, heh.

Davidl81

What if it is 465 base, then 475 with NPP? Just a thought as the NPP has 24% more air floe than the C6 NPP.

Process Black

Granted most people don't use their cars as daily drivers, but I've put over 100k on each Corvette I've owned and their engines feel as potent as they were with 5 miles on the clock. This includes plenty of high speed driving/track use.

Regular maintenance is key.

RocketGuy3

Better, but I was hoping for 480+ with NPP. It just seems like with this significant improvement in tech (higher compression ratio, DI, higher revs), they should be capable of at least a modest 10% improvement.

OHV4LIFE

My guess is that the real target is 465 hp. The LT1 weighs 465 lbs. A 465 hp output would put it at the 1 hp/lb power to weight threshold, which is a significant achievement.

Kappa

Agreed. It slots the LT1 right between the LS3 and LS7 and is more than enough to take on cars like the 991 Carrera S, Cayman S, or whatever else is in the $55-90K class.

I guessed 475hp and I think it'll get close.

Snorman

Now that you've mentioned Porsche, it's a matter of time before our magazine quoting trolls blow up this thread.
You know those clowns do a keyword search everyday to determine in which threads they are going to sh*t.
S.

CaryKen

Can't quote you any studies or surveys, just another personal anecdotal data point.

My 2000 C5 FRC now has 108,000 miles. Running absolutely great.

Jawnathin

My gut feeling tells me that that is the case. While it may have spun upto and run to 7k for testing purposes, it doesn't mean GM is comfortable with production motors spinning that high. There might have been concerned about long term durability and subsequent warranty costs.

I just read an article the other day about LS7 development and touched on the amount of effort it took for GM to get the LS7 to 7k RPM. The LT1 does have a shorter stroke and smaller pistons, so it could be a bit easier, but it did take considerable effort, including using expensive titanium connecting rods to get it to spin so quickly.

FWIW, piston speeds on an LS7 are 4700 feet per minute, almost 20% greater compared to the 4000 feet per minute for the LS3, and I assume the LT1.

Given GM already announced the specifications, I am expecting 6600rpm but would be excited to see anything above that.

travisnd

The LS7 needed special stuff because the long stroke made for high piston speeds. LT1 has a shorter stroke.

99C5JA1

If increasing HP was their only goal you would easily see more. The Fed's and the increasing standards have a strong influence on the design goals. We can both dislike that (I know I do), but that doesn't change it.

sam90lx

So are these numbers accurate or not? 465 and 448?

Hemi Dave

That's when you are in econo mode

........in track mode its 505HP and 505TQ

rad928music

100k Miles is nothing for a small block chevy.
Even the old ones.

bigterpsfan

They said 450 so consider even 451 a bonus.