[2SSRS@Gen5diy]

Originally Posted by Bhobbs

If the Z/28 is n/a, I bet it will be something along the lines of the LS6. Better heads, hotter cam, better intake manifold. The LS6 saw a 15% increase over the LS1. That would put the LT6 at 530 hp.

That should keep development costs down as well. Put the extra money into the light weighting. Imagine a Z/28 making 530 hp, 480 tq and weighing 3600 lbs.

I think your right, but god hope not, to make the Z/28 a grate track car it needs to have a light weight motor and high RPM one at the same time, LOL like this weekend at big willow coming out of turn 9 in to the front straightaway, shifting from 3-4 and get to the last 300 ft up shift to 5th only to go back down to 4th as you go in to turn 1, now if i can get more RPM's out of the car say 8400 there is no need to up shift in the long straightaway's and still heat the 140mph mark.

I know what ever the build it will be a grate track car, like the Z/28 in the GEN5 car was for its time.

[2SSRS@Gen5diy]

Originally Posted by Bhobbs

Yeah but if 500 is good 530 is better.

580 is more better, LOL

[Bhobbs]

Originally Posted by 2SSRS@Gen5diy

I think your right, but god hope not, to make the Z/28 a grate track car it needs to have a light weight motor and high RPM one at the same time, LOL like this weekend at big willow coming out of turn 9 in to the front straightaway, shifting from 3-4 and get to the last 300 ft up shift to 5th only to go back down to 4th as you go in to turn 1, now if i can get more RPM's out of the car say 8400 there is no need to up shift in the long straightaway's and still heat the 140mph mark.

I know what ever the build it will be a grate track car, like the Z/28 in the GEN5 car was for its time.

With the shorter stroke of the LT1, I don't see what would keep it from revving like the LS7.

[RedonBlackRS]

Originally Posted by Bhobbs

With the shorter stroke of the LT1, I don't see what would keep it from revving like the LS7.

The biggest rev inhibitor is the AFM cam.
Remove AFM, and maybe the VVT, and I can see revs around 7200-7500 instead of the current 6500-6600. If the cam itself is a bit hotter, a freer-flowing intake and exhaust, and the corresponding heads are involved, 530-550 hp and 490-510 lb-ft shouldn't be out of the realm of possibility.
And this would be a perfect engine for the Corvette Grand Sport as well, so the cost is spread out better.

[Bhobbs]

Originally Posted by RedonBlackRS

The biggest rev inhibitor is the AFM cam.
Remove AFM, and maybe the VVT, and I can see revs around 7200-7500 instead of the current 6500-6600. If the cam itself is a bit hotter, a freer-flowing intake and exhaust, and the corresponding heads are involved, 530-550 hp and 490-510 lb-ft shouldn't be out of the realm of possibility.
And this would be a perfect engine for the Corvette Grand Sport as well, so the cost is spread out better.

Definitely ditch the AFM lifters.

I was surprised to see the GS not get a new LTx, to share with the Z/28 but I have a feeling that power bump would have put it too close to the Z06 around a track.

[2SSRS@Gen5diy]

Originally Posted by Bhobbs

Definitely ditch the AFM lifters.

I was surprised to see the GS not get a new LTx, to share with the Z/28 but I have a feeling that power bump would have put it too close to the Z06 around a track.

You mean the ones that can make it on the track more then 1 or 2 laps ?.

[BradfordCamaro]

I still say they will keep with the 50 year theme and throw in a 396 Cu. In. Or hop up last year's 427.
I thought about getting a 2015 Z just for the pure awsomeness of owning a 427

[Zeke.Malvo]

Originally Posted by Bhobbs

The cost of the LS7 was due to the unique block and heads, along with the titanium components. The LT4 is much cheaper than the LS9, despite making more power and torque.

Building the new engine off the LT1 block and heads will help keep costs down.

If making 15% more power in a mass produced vehicle/NA engine while meeting regulations and standards is so easy, why didn't GM just build a simple cheap variant of the LS3 as the LS7 as you're proposing? What was the point of the LS7 as it was designed then?

[RedonBlackRS]

Originally Posted by Zeke.Malvo

If making 15% more power in a mass produced vehicle/NA engine while meeting regulations and standards is so easy, why didn't GM just build a simple cheap variant of the LS3 as the LS7 as you're proposing? What was the point of the LS7 as it was designed then?

LS7 (2006) actually came out before LS3 (2008), but I get what you're saying.

[Bhobbs]

Originally Posted by Zeke.Malvo

If making 15% more power in a mass produced vehicle/NA engine while meeting regulations and standards is so easy, why didn't GM just build a simple cheap variant of the LS3 as the LS7 as you're proposing? What was the point of the LS7 as it was designed then?

Because the LS7 was the best they could do in the early 2000s when it was designed.

LS7 was first used in the 2006 Z06.

The LS3 came out in the 2008 Corvette. They had no reason to update an LS3 type engine to make LS7 power when the LS7 already existed.

[Mikes SS]

All of these points argued are great, I pined for the Z/28's return in the 5th gen. We got sold out due to CAFE requirements, and GM made a huge mistake of making an awesome $75k CAMARO. Big mistake, and I hope if nothing else, they learned from that. Z/28 has its own name and following they almost sell just because of the badge but not for the price they thought they could get for it. They have to make the money on the 4&6 cyl cars and not price themselves out of the market for the hi-po V-8s. /rant

[four0nefive]

Originally Posted by 2SSRS@Gen5diy

You mean the ones that can make it on the track more then 1 or 2 laps ?.

What track were you at? What were the temps like, and were the Z06s autos or manuals? The manual Z06 doesn't really have the heat issue. I know tons of people that have ran full 20-25 minute sessions in 80+ degree weather. One of them (manual car) is running in the low 2 minute range at VIR (full track), another guy is in the low 1:30s at Road Atlanta (also manual car, ran for 45 minutes straight btw) and two others running under 2:20 at Sebring (1 auto and one manual).

The trick with the Z06 is to use higher gears (ie- 3rd instead of 2nd) because the car makes loads of torque down low.

[2SSRS@Gen5diy]

Did not look if they where Autos or manual car's, it was Big Willow in Ca, temps where in the 80+ which for out there is cold, LOL but the all lift on a tow truck.

[camaro-dreamer]

Originally Posted by Bhobbs

The cost of the LS7 was due to the unique block and heads, along with the titanium components. The LT4 is much cheaper than the LS9, despite making more power and torque.

Building the new engine off the LT1 block and heads will help keep costs down.

Luckily the price of many grades of titanium are only a fraction of the cost that they used to be. I think materials price may not be as big of a factor this time around.