[DGthe3]

Originally Posted by Bhobbs

Yep, the 5.2 Voodoo is the largest production FPC V8 that I can find. Besides, a push rod V8 really wouldn't be able to use the RPM range offered by a FPC. The valve train would explode.

Tell that to the Nascar boys that run their pushrod engines at 9000+ RPM. Then again ... those engines only ever have to last a few hundred miles. Maybe thats a bad example.

[Mikey LikesIt]

Originally Posted by Jeffro19

It would be awesome to see a LT7 with around 540-550hp. I do believe that GM would give it to the Camaro first. GM seems to be shying away from the Corvette always having it first way of thinking. We shall see.

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.

[Nick S]

Originally Posted by DGthe3

Tell that to the Nascar boys that run their pushrod engines at 9000+ RPM. Then again ... those engines only ever have to last a few hundred miles. Maybe thats a bad example.

I'm pretty sure the NASCAR guys run solid lifters too and not hydraulic lifters that production cars run. But the NASCAR teams have the time and ability to adjust the valve lash when needed. Not many people are going to want a production street car that they have to adjust valve lash on all the time. The hydraulic lifters are the limiting factor in the RPM ranges.

[DGthe3]

Originally Posted by Nick S

I'm pretty sure the NASCAR guys run solid lifters too and not hydraulic lifters that production cars run. But the NASCAR teams have the time and ability to adjust the valve lash when needed. Not many people are going to want a production street car that they have to adjust valve lash on all the time. The hydraulic lifters are the limiting factor in the RPM ranges.

As I said ... they only need to last a few hundred miles, maybe they're a bad example.

[DGthe3]

I just noticed that in responding to others comments in here ... I failed to actually discuss the topic at hand. Whoops, mods are supposed to keep threads on track -not derail them.



Anyway, I agree with pretty much everything that the Motor Trend guy is saying. Although it doesn't need to specifically be a 7L engine. I could see GM going with something a little bit smaller to alleviate issues that the 7L displacement caused for the LS7. Backing off just a hair could allow them to build an engine thats more conventional & therefore good bit cheaper while delivering almost the same performance. I'm thinking a 6.8L -ish engine might strike a good balance, though I have absolutely nothing to base that on other than gut instinct.

[mjw930]

Yea, I know the FPC was a non starter, just like the design.

Tadge, the Corvette chief engineer said point blank the LS7 was dead from a production standpoint 2 years ago due to corporate fuel economy directives and emissions. That doesn't mean they haven't developed a "new" member of the LT DI family with more than 6.2L displacement that can play in the mid 500 HP range.

[banter]

OR! (Just remembered about this bad boy) a DI 5.3L N/A motor like was first speculated for the c7 corvette and i believe is in one of the c7 racers.

[Bhobbs]

Originally Posted by DGthe3

Tell that to the Nascar boys that run their pushrod engines at 9000+ RPM. Then again ... those engines only ever have to last a few hundred miles. Maybe thats a bad example.

Fair point. I should clarify. A production push rod V8 with a 100k warranty in a car that costs less than $100k could not take advantage of the flat plane crank.

[Zeke.Malvo]

Originally Posted by Bhobbs

Fair point. I should clarify. A production push rod V8 with a 100k warranty in a car that costs less than $100k could not take advantage of the flat plane crank.

Good thing GM only offers 60k warranty.... ?

[Zeke.Malvo]

Originally Posted by Z_Rocks

When I heard that car in low RPM, my first thought was, that sounds like an LS7 and not LT1. The pulsation sounded much more like LS7.

Does the LS7 have a different firing order than the LT1?

[newmoon]

Anyone who thinks GM isn't capable of building a 7.0 liter motor capable of besting the GT350R in this new Z/28 is smoking crack or has their fanbois head so far up their backside they can't see daylight. Voodoo

The Ford camp needs to stop worrying about the Z/28 and ZL1 and worry about the 1LE which is going to give them all they can handle.

[Z_Rocks]

Originally Posted by Zeke.Malvo

Does the LS7 have a different firing order than the LT1?

I think it's the cam that is different and make it sound different.
If you put and LS7 and LT1 next to each other you will notice the pulsation is different. I really don't know why?

[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?

[Z_Rocks]

Originally Posted by newmoon

Anyone who thinks GM isn't capable of building a 7.0 liter motor capable of besting the GT350R in this new Z/28 is smoking crack or has their fanbois head so far up their backside they can't see daylight. Voodoo

The Ford camp needs to stop worrying about the Z/28 and ZL1 and worry about the 1LE which is going to give them all they can handle.

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.