[Bhobbs]

Sure, it's easy when you don't have to comply with smog and fuel regulations, or guarantee it will last for over 100k miles.

[6spdhyperblue]

the first time i thought this i thought it was crazy, but more and more i think about it, i think if its low volume, the ls7 could come back.

the fact that they are still using the LS architecture in the HD trucks is leading me that it could be possible. what do you think

[Bhobbs]

Originally Posted by Nicul15

the first time i thought this i thought it was crazy, but more and more i think about it, i think if its low volume, the ls7 could come back.

the fact that they are still using the LS architecture in the HD trucks is leading me that it could be possible. what do you think

The LS and truck engines are different, so that doesn't mean the LS7 is still alive.

If they can do another n/a Z/28, I would rather it get the improvements of the LTx.

The LS3 was 430 hp. The LT1 is 455. If they built a 7.0 LTx with the same basic improvements, it would be 540 hp.

[BradfordCamaro]

Originally Posted by Nicul15

the first time i thought this i thought it was crazy, but more and more i think about it, i think if its low volume, the ls7 could come back.

the fact that they are still using the LS architecture in the HD trucks is leading me that it could be possible. what do you think

Just with a better tune up to 550-575HP

[6spdhyperblue]

Originally Posted by Bhobbs

The LS and truck engines are different, so that doesn't mean the LS7 is still alive.

If they can do another n/a Z/28, I would rather it get the improvements of the LTx.

The LS3 was 430 hp. The LT1 is 455. If they built a 7.0 LTx with the same basic improvements, it would be 540 hp.

how are they different? they share the same architecture the parts are interchangable. i would imagine the manufacturing process is the same besides them handbuilding the ls7?
they are still producing them for GMPP crate engines right? are they NOS?
its a big speculation across the board but if they brough a legacy engine into a new vehicle there, it might be possible here.

i thought they already said the LTx 7.0 didn't meet emissions. maybe not for high production vehicles like the Z06/ZL1?

[Bhobbs]

Originally Posted by Nicul15

how are they different? they share the same architecture the parts are interchangable. i would imagine the manufacturing process is the same besides them handbuilding the ls7?
they are still producing them for GMPP crate engines right? are they NOS?
its a big speculation across the board but if they brough a legacy engine into a new vehicle there, it might be possible here.

i thought they already said the LTx 7.0 didn't meet emissions. maybe not for high production vehicles like the Z06/ZL1?

The architecture is the same and the components are interchangeable, but the details are different. Different cams, different intakes, different power and torque.

That's why they have different designations.

[DGthe3]

Originally Posted by Nicul15

how are they different? they share the same architecture the parts are interchangable. i would imagine the manufacturing process is the same besides them handbuilding the ls7?
they are still producing them for GMPP crate engines right? are they NOS?
its a big speculation across the board but if they brough a legacy engine into a new vehicle there, it might be possible here.

i thought they already said the LTx 7.0 didn't meet emissions. maybe not for high production vehicles like the Z06/ZL1?

I think the cutoff line for 'high volume' is around 50 units, over the total run. Even the worst sales expectations for the Z/28 would be 10x that.

[shaffe]

So I still don't see a true 100% unique engine for the Z/28. The Grand Sport did not get one, the Z06 still using the LT4. The rumored ZR1 might be powered by the rumored LT5 which might also power the rumored mid engine Zora. The LT5 I would guess is going to have a power adder on it.

So I still stand by my guess of a tweaked LT1 ala LS1 to LS6

[Bhobbs]

Originally Posted by shaffe

So I still don't see a true 100% unique engine for the Z/28. The Grand Sport did not get one, the Z06 still using the LT4. The rumored ZR1 might be powered by the rumored LT5 which might also power the rumored mid engine Zora. The LT5 I would guess is going to have a power adder on it.

So I still stand by my guess of a tweaked LT1 ala LS1 to LS6

I really have to wonder if they didn't give the GS more power because it would get too close to the Z06.

Either way, I think an LT6 making 530-550 hp would be perfect for the Z/28.

[2SSRS@Gen5diy]

Originally Posted by Bhobbs

I really have to wonder if they didn't give the GS more power because it would get too close to the Z06.

Either way, I think an LT6 making 530-550 hp would be perfect for the Z/28.

That is a bit low, hope to see 565 HP, in keeping with the same gap from the LSA to LS7 in the last GEN

[DGthe3]

Originally Posted by 2SSRS@Gen5diy

That is a bit low, hope to see 565 HP, in keeping with the same gap from the LSA to LS7 in the last GEN

I was thinking the opposite, that 530 feels a bit high for a factory NA 6.2L small bock.

If they were to go out to 7ish litres, then I can see 565 happening. But thats no longer an 'LT6'-type engine like what Shaffe & Bhobbs were talking about.

[Bhobbs]

Originally Posted by DGthe3

I was thinking the opposite, that 530 feels a bit high for a factory NA 6.2L small bock.

If they were to go out to 7ish litres, then I can see 565 happening. But thats no longer an 'LT6'-type engine like what Shaffe & Bhobbs were talking about.

The LS1 was 350 hp, I believe. The LS6 ended up at 405 hp. That's an increase of about 16%. If you apply that to the LT1, that end up around 526 hp. Is there a 16% increase in the LTx 6.2 liter while staying emissions compliant? I sure hope so.

That's the only reason I've thrown out the 530 hp number. Well, that and it's 4 more than the Voodoo.

[DGthe3]

Originally Posted by Bhobbs

The LS1 was 350 hp, I believe. The LS6 ended up at 405 hp. That's an increase of about 16%. If you apply that to the LT1, that end up around 526 hp. Is there a 16% increase in the LTx 6.2 liter while staying emissions compliant? I sure hope so.

That's the only reason I've thrown out the 530 hp number. Well, that and it's 4 more than the Voodoo.

Fair enough. I think I was projecting off of the early run LS6s that were 385 hp (vs the 400 of the latter ones).

455 x 385/350 = 500.5

[ChevyRules]

Originally Posted by Nicul15

i thought they already said the LTx 7.0 didn't meet emissions. maybe not for high production vehicles like the Z06/ZL1?

That statement was in relation to the Z06. They couldn't remain emission compliant for a 640 HP 7.0 liter NA V8. If all they wanted to do was produce a ~550 HP 7.0 LTx, they probably could get it to hit emission requirements.