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Old 03-28-2013, 05:38 AM   #43
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Seeing how it has a factory cai and "possibly" better exhaust manifolds I say it's going to have a few more ponies then 505. On the flip side we don't know how the cai compares to the vette setup and the ls7's really didn't gain much from headers since the exhaust manifolds was one of the the best flowing stockers ever made so....
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Old 03-28-2013, 11:15 AM   #44
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I wonder if the Z28's LS7 is going to come complete with the Z06 LS7's crappy valvetrain. Lots of unhappy camper Z06 owners. I hope the general gets it right on this one
I'm sure it will. Send the heads out to get Solid Stainless exh. valves and bronze guides. Have em machined to 11.5 : 1 at the same time.
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Old 03-28-2013, 11:37 AM   #45
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Ummm, the 302 shares the same bore size with the 327, and 350 engines. It has a very short crankshaft, making it a nice high winder of an engine. It does NOT share the same block as the 283.
That and the 327 has the same 4" bore but a 3.25" stroke crank. Where did this article come from? Full of BS.
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Old 03-28-2013, 12:57 PM   #46
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it actually might make more power than the ls7 in the Z06 since it already has a CAI on it. Biggest factor will be how free flowing that exhaust is on it.

For the HP junkies out there, I see a lot of 580rwhp H/C Z28s in the future
580rwhp is easy. The goal for a long time was 600rwhp using a hydraulic and a standard manifold. There are setups now way over the 600rwhp mark.

Just for reference... in a 3800lbs. car that is good for a low 11 (high 10) at 130mph give or take a few up or down.

The drivetrain is what will probably make the biggest difference I think. I can remember when I picked up a 408ci for my z28 about 8-9 years ago that in a corvette, compared to a camaro the rwhp would be less (~20rwhp-~30rwhp) in the vette. Drivetrain made the difference.. different tolerances, different coefficient of friction, etc. nothing else changed.



But I finished reading that the Z28 will be more expensive than the ZL1. Well... that is just horrible news. I Kinda killed the excitement from yesterday for me.
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Old 03-28-2013, 04:09 PM   #47
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Originally Posted by carman II View Post
Aside from the tri-Y exhaust manifolds, is the LS7 in the Z28 any different than the LS7 that's been around for several years on the Z06?

Accessories will be a little different, as will the oilpan. Longblock (sans pan) will be the same.

We may or may not be making an announcement about this soon....but you saw it here on C5 first.
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Old 03-29-2013, 01:09 AM   #48
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Originally Posted by adamgl View Post
I'm sure it will. Send the heads out to get Solid Stainless exh. valves and bronze guides. Have em machined to 11.5 : 1 at the same time.
I was wondering if this LS7 was going to have the same valve guide wear issues as past LS7's as well. If owners do have to send the heads off for new valve guides just to run a tune that will be crap. New Z28 owners shouldnt have to deal with those issues on this car especially since GM has known about the issue for 5+ years.
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Old 03-29-2013, 04:09 AM   #49
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will they use the same trans gears and rear gears as the track proven 1le? the 1le shares the same trans gears as the z06 but the z06 oddly enough has 3.42's rear gears while the 1le has 3.91's. only reason i see why the z06 get's pretty decent fuel economy compared to the 1le when compared stock to stock
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Old 03-29-2013, 06:40 AM   #50
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Old 03-29-2013, 08:04 AM   #51
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will they use the same trans gears and rear gears as the track proven 1le? the 1le shares the same trans gears as the z06 but the z06 oddly enough has 3.42's rear gears while the 1le has 3.91's. only reason i see why the z06 get's pretty decent fuel economy compared to the 1le when compared stock to stock
You have to factor in tire height. The overall gearing could be close to the same after you do this. The MPG difference is due more to weight and drag.
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Old 03-29-2013, 09:52 PM   #52
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Originally Posted by wildpaws View Post
First gen. Z/28 could not be ordered with auto tranny, air conditioning and not available as a vert.
Clyde
Learn something new everyday..:-) Thanks.

I guess the Z/28 just seemed to be a more mainstream street car and the ZL1 was rarely seen on the street. Don't get me wrong I love the car and the return of the Z/28 I personally need a few more basic creature comforts like a radio...lol Manual is the only way to go though so no complaints there.

Also, if I am not mistaken... in order to qualify the first Z/28 could not exceed 302 CI and must be a normal production car to qualify.
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Old 03-29-2013, 10:00 PM   #53
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Get em Clyde!


Don't get me wrong I love the car and the return of the Z/28 I personally need a few more basic creature comforts like a radio...lol Manual trans is the only way to go though so no complaints there.
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Old 03-29-2013, 10:02 PM   #54
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The 1st Gen Z/28s were all 302 4-speeds. No automatic and no AC. Starting in '70, you could get an automatic. AC wasn't available until '73.
Ok thanks, as I said I learn more and more every day..
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Old 03-30-2013, 09:49 AM   #55
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Just as in the ZL1, seems an auto with paddle shifters would be faster...would also get me off the fence. Would like to know moe about suspension and rear gear as well....
Still sounds like an awesome muscle car!! With all the tech advances we CAN have the best of both worlds!
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Old 03-30-2013, 10:05 AM   #56
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Couple of things

Tires are only 26.2" tall vs. 27.9 for 1LE and 28.7 for LS, LT and SS.
So there is a 6.5 percent torque multiplication advantage vs. the 1LE tire, rearend, transmission package. Cruising rpms are 6.5 percent higher as well.

Somebody said that it will have the best power to weight ratio of any Camaro. I don't know if that is true but if the ZL1 s 7.1 lbs per hp. And the Z28 is 7 lbs per hp for example, and it weighs 3750 lbs, then the the LS7 will have to have 535 hp.

I don't think they are going to get 535 hp unless the do a little something to the cam but that is the calculation.

Regardless, this car is going to be a badass and highly collectible.
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