Phil1098

It is when your talking a 33% improvement. The gearing is slight (2-3 gear change at 58 vs 62) and all the internal ratios are the same, the tires would make a small difference, but the standard tire isn't a Firestone Town and Country snow tire either. So I wonder how he would explain, if equipped with the same NPP exhaust that the Z51 comes with, both engines have the exact same HP and torque. GM only submitted the LT2 to the SAE for certification, but they really have a secret one that only goes in the Z51 cars. At Carlisle Tadge said everyone is going to be very surprised at just how close the standard car is to 60 as the Z51. Being slower by 3 tenths than a 460 hp C7 without the weight distribution of ME is ridiculous to even say. Much less the wider tires on a C8 vs a C7 and the WAY more aggressive gearing. I think somebody said what happened to this guy earlier. He was pouring over all the specs and trying to memorize and it said .1 difference and he just remembered seeing a 1. He doesn't work for GM, he's just a guy who works for a company contracted to drive around and show the cars. No different than listening to the bimbo spewing features about a car at the auto show. The only thing she knows is what she has memorized, and would know a crankshaft from a camshaft.

TJay74

Most of what that rep said is BS, I will say the only thing he said that is probably true will be the tune. I will say yes, the Z51 will have a different tune but only in the ways needed for gearing and such. I will validate this by saying this is why.

My current toy is a 17 Camaro SS 1LE 6spd manual. When I compared my OEM tune against a 17 Camaro SS 6spd manual car without the 1LE track package there are differences in the tune, some of it is due to gearing differences and some of it is fueling and fuel pressure differences due to the 1LE cars having the in tank fuel pump that the LT4 ZL1/Z06 use.

Other than those minor changes I predict the majority of the C8 vs C8 Z51 tune will be really close, mainly because if GM changes it too much they would have to re-certify the powertrain with the EPA again and that process is very time consuming and expensive.

carriccp

I too noticed the black side rockers when I saw the car at Conti's. Wasn't sure if they were coming off, or just extremely poor fitment from the start. I'll be wrapping mine in carbon flash anyways for what they cost and to match the scoop.

bubbadog

No.
I asked him that directly and he said one full second.
I did not see any point in debating the issue with him.

Supersonic 427

No way is Z51 a full second faster to 60 MPH! The gearing is a little more aggressive with Z51 but not much. I think. .1 seconds is what was meant, not 1.0 seconds.

firstgear

This entire thread is hilarious!

SkyBlueVette

So what's the 0-60 difference between non z51 with NPP exhaust vs Z51? I bet its the same

FinsterforstFan

A full second difference doesn't sound plausible to me. I'm guessing he confused 0.1 with 1.

Hot Rod Todd

The one second difference could be the result of the tires. If you happen to be on a surface where the Sticker tires hook, but the standard tires do not, it would be easy to loose a second. Anyone who has ever been to the drag strip can understand that it's possible, or even probable. That being said when they do 0-60 testing they usually try to use a surface that is as perfect as it gets. It would not be hard to have a surface that was just good enough for the better tires, making it look like the Z51 provides a lot more improvement in performance than the actual difference on a surface where both tires hook up.

Wyldfyer

I'm not saying a full second is plausible. But 0.1 doesn't sound plausible either.
Gearing is a huge boost for acceleration. Stickier tires alone will get you 0.1s

Wyldfyer

Agree with this 100%.

I'm actually surprised at the amount of people who don't know the effects of tires and gearing on acceleration. It's actually baffling to be honest.
Of course it may still be a while before we know because someone will have to test the non-Z51 and compare.

23/C8Z

Yeah.. and 2.8x? I think there's gonna be some head scratching when these magazines post their observed times... just like chevy has done to them with the C7 Z06 and ZR1 0 to 60s... other mfrs times are slower than what the mags get... chevy has not been so.... reserved... in their numbers over the past decade..

C6ness

When the C7 A8 came out in 2015 Tadge told motor trend that they have seen times as low as 3.5 and 3.6 0-60 but 3.7 is what they are going with because it's more attainable. Well alrighty then.

Jinx

The rocker bits may be coming off because the car you’re looking at has had a thousand fumbling entrances and egresses... or because one guy stepped on it trying to get a high-angle interior shot.

Your own personal car may not be subjected to such abuse and may not develop a noticeable gap.

ethans_dad

I thought I read that the Z51 package had different exhaust headers? Equal length 4-1 SS vs cast 4-2-1 which gave it a minor 5hp boost over the std. Stingray. Not sure thats a 1 sec. delta, but I think its mostly tires and the ESD.

GOC

This dealer is just trying to sell you the Z51 package.
I would think twice about everything else he tries to sell you.
I wouldn't even be surprised if the base and Z51 had identical 0-60 numbers in real life. I know GM supposedly lists them as 2.9 for Z51 and 3 secs for the non Z51, but that can just be marketing.

usrodeo4

lol...I know a guy...

usrodeo4

0-60 times are mostly smoke and mirrors...a good Test Engineer can come up with whatever number he wants (within reason) depending on the test environment, the test equipment sensors, and the "parameters" of the test. If we want to believe a 495 HP C8 has the same 0-60 times as the new 710 BHP F8 Ferrari, which weighs hundreds of lbs. less and which Ferrari says is 2.8 to 2.9 secs. 0-60, then sure go for it.

16falcon

That was bad info that was posted here. Same headers on both. 5 extra horsepower is attributed to the NPP Performance Exhaust, which can (should!) be added to a non Z51 build, it’s included in the Z51 package.

lostsoul

I hear allot of jealous non-z51 buyers and c7 Zo6 owners. lol

no one will be able to beat the z51 with:

better then cast manifold
reversed firing order
New GM "X-Tune" loaded
NPP v2 that actually makes 5hp while v1(1hp) is an option on Base C8

The fear is great in this thread...