[newmoon]

Originally Posted by Z_Rocks

I'm sure they can, but at some point GM said, LS7 liter is out of the picture due to Gas millage. Unless they build an LT7 that is still powerful and produces good MPG and emission.

I don't think gas mileage is really going to be one of the key decision factors we are talking about a factory built track car here. I'm sure the LS7 is gone but like the article infers is it an LT7? Either way 5.0 liter - 7.0 liter whatever they decide I'm sure it will be fully capable of achieving the goal.

[DGthe3]

Originally Posted by quikag

GM isn't going to put a prior gen engine into the next Z28. They probably will offer a different displacement LT series in the Z28.

So, either a 7.0L for the 427 cool factor or, more interestingly, maybe a LOWER displacement spinner. 5.5L spinning to 7500-8000rpm and making 530-540hp with a 10 speed to keep it in the meat of the power band. How awesome would that sound?

Much rather have a bigger engine with a wide power band so that shifting is less necessary.

Originally Posted by Z_Rocks

I'm sure they can, but at some point GM said, LS7 liter is out of the picture due to Gas millage. Unless they build an LT7 that is still powerful and produces good MPG and emission.

Fuel economy isn't going to be much of a factor with buyers. I mean, if you're looking at plunking down 60-80 grand on a track special Camaro ... are you really going to be worried about a couple MPG? Decent fuel economy becomes a nice bonus, but unlikely to sway any buyers one way or the other.

As for CAFE, remember it's Corporate Average Fuel Economy, not Individual Model Fuel Economy. Cars that have a low production volume like the Z/28 have a very minimal impact. A thousand cars per year is nothing in comparison to the ~3 million GM sells in the US each year.

[Mister Will]

I'm no engine sound expert. But there is clearly a difference in the exhaust notes of the two cars. The ZL1 seems a little higher pitch and motorboat like. While the Z28 is throatier. Could it just be a free-er flowing exhaust?

[90503]

Not sure what makes Motor Trend's case any different than what's been discussed over and over here....(Car and Driver make a case that it will be and LT4 http://www.caranddriver.com/news/201...py-photos-news )

....One common denominator, though...."Just change this a little, modify that, bump this up a little, and there you go....".....All wishful thinking that has been pretty well explained as impractical for a limited production engine....They tried to build a new high hp normal aspirated engine for the Vette and possibly for the Z/28....IT COULDN'T BE DONE for what was required in a production, legal engine...

I believe like everyone else, they can build any variant, any combo, any hp V8...but if it can't jump through all the hoops necessary for production, we won't see it...The LS7 was a one-time opportunity to extend it's use with the 5thGen Z/28....That window has closed.

Reality check: It will be an LT4....

[banter]

While i understand the points of the argument, it doesn't make business sense. If it has an LT4, aside from the aero package what will differentiate it from the ZL1? Why not just have an aero package for the ZL1 (sort of like the whole z07/z06).

[HCT]

Originally Posted by 90503

....One common denominator, though...."Just change this a little, modify that, bump this up a little, and there you go....".....All wishful thinking that has been pretty well explained as impractical for a limited production engine....They tried to build a new high hp normal aspirated engine for the Vette and possibly for the Z/28....IT COULDN'T BE DONE for what was required in a production, legal engine...

And yet Ford managed to build their brand new flat plane Voodoo engine for the GT350. It's emissions compliant, high output, and its R&D costs can't be amortized over multiple product lines.

I think if GM says a new NA engine "can't be done" there's an implicit qualifier where they're restrained by a given development budget, not that it's technologically impossible.

[Jeffro19]

Originally Posted by Mikey LikesIt

Are you on LS2? Your name rings a bell. I was on there but got permabanned.

It makes sense to try stuff out it the Camaro first, work the bugs out.

Nope not me I am just on this forum and the GM trucks forum. The LS7 is dead not coming back period. I see a LT7 or something very secret we don't know about. I would be very suprised to see the LT4 in this Z28.

[90503]

If they wanted to create some hype and real speculation, the use of the ZL-1/LT4 hood sure didn't help.

A new mystery engine with the LT4 hood at the Ring? If they are running something other than an LT4, I would think part of the Z/28 aero package would be a unique hood....

[Bhobbs]

Not necessarily. The 5th gen Z/28 use a similar hood to the SS.

The ZL1 hood may just be very efficient at reducing lift and extracting heat, so a new design isn't needed.

[doc7000]

Didnt we have this big debate last time around about what engine would go in the z28?.

[DGthe3]

Originally Posted by 90503

Not sure what makes Motor Trend's case any different than what's been discussed over and over here....(Car and Driver make a case that it will be and LT4 http://www.caranddriver.com/news/201...py-photos-news )

....One common denominator, though...."Just change this a little, modify that, bump this up a little, and there you go....".....All wishful thinking that has been pretty well explained as impractical for a limited production engine....They tried to build a new high hp normal aspirated engine for the Vette and possibly for the Z/28....IT COULDN'T BE DONE for what was required in a production, legal engine...

I believe like everyone else, they can build any variant, any combo, any hp V8...but if it can't jump through all the hoops necessary for production, we won't see it...The LS7 was a one-time opportunity to extend it's use with the 5thGen Z/28....That window has closed.

Reality check: It will be an LT4....

They couldn't do one that met their requirements for the Z06 -not simply any car. If they wanted 600+ hp out of it or for the new Z06 to out accelerate the C6 ZR1, it becomes a far bigger challenge than what is required for the Z/28 (which is merely to beat the GT350).

The former would require breakthroughs in production pushrod engine technology. The latter would merely be applying current technology to an engine concept thats over a decade old.

[hotlap]

Originally Posted by oakaro68

I'm very excited to say the least. I keep thinking this car sounds deeper, aka, more displacement.

I'm in heaven trying to decide between a Z/28 and a ZL1! Both phenomenal cars. If the Z/28 has the same engine as the ZL1, which I think is very unlikely because they are totally different animals, I'd be ok with that too. But you have to remember Al O said they are sticking to the car's DNA. This thing is n/a and will be a wicked SOB.

Quote below from the FOX new interview when Al was asked if they would do anything beyond the ZL1. Recall that Reuss aleady said they are looking to the past for insperation for the next Z/28. Start at time mark 4:15

The names that showed up in the 5th generation earned their names from the DNA of the past and before we would do anything beyond a ZL1 it would have to really be something that earned its way in.

http://www.foxnews.com/leisure/2016/...?intcmp=hphz07

[Z_Rocks]

My personal thought:
If Z/28 comes out with a N/A 7 Liter engine V.S. ZL1 with Lt4, I'd buy the Z/28.

Nothing beats a big N/A V8 engine, and I've had both styles S/C and TT.

[Millertime555]

I feel like I'm the only one who clearly heard a blower whine at 0:35 in the video