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Camaro Z/28 Forum - Z/28 Specific Topics Discussions related to the 5th gen Camaro Z/28 model

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Old 03-27-2013, 07:11 PM   #26
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Originally Posted by ruel24 View Post
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 would be correct, the 302 shared the 4" bore and blocks with the 327 and 350 engines, the 302 ci displacement was obtained by using the shorter stroke 283 crankshaft. Whoever did that article for the LS7 needs to do a serious re-write!
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Old 03-27-2013, 07:12 PM   #27
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Awesome car. I think if I wanted a car I did nothing but track I would have one. For a car I can drive every day, and rock the track with I will take a ZL1 however.
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Old 03-27-2013, 07:29 PM   #28
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I had one of those 302 DZ motors back in the mid seventy's. Only small block chevy I have ever owned that I came off the line at 10,200 RPM. Yes you read that correctly
Then you must have had a '69 as that was the only year for the DZ version, '67/'68 302s were not the DZ version.
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Old 03-27-2013, 07:39 PM   #29
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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
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Old 03-27-2013, 07:41 PM   #30
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Old 03-27-2013, 09:17 PM   #31
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The Z is Back!

Hmmmm no HID, no LEDs, no cushion in the rear seats, no speakers and they even removed the wiring to save a pound. So it’s not going to be easy to retrofit. Did I miss something or couldn’t you always order the Z28 RPO with all trim levels and an automatic?? What about a Z28 Vert?? Finally after waiting for what seemed a lifetime for the Z28 to return it comes in only one limited model flavor… If one can only afford one Camaro, and one wants to take it to the track and make use of it for anything else I guess one must rough it! Seems to me what should have been done to the ZL1, the Z28 was more of a masses car. It just seems flipped to me..
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Old 03-27-2013, 09:20 PM   #32
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Hmmmm no HID, no LEDs, no cushion in the rear seats, no speakers and they even removed the wiring to save a pound. So it’s not going to be easy to retrofit. Did I miss something or couldn’t you always order the Z28 RPO with all trim levels and an automatic?? What about a Z28 Vert?? Finally after waiting for what seemed a lifetime for the Z28 to return it comes in only one limited model flavor… If one can only afford one Camaro, and one wants to take it to the track and make use of it for anything else I guess one must rough it! Seems to me what should have been done to the ZL1, the Z28 was more of a masses car. It just seems flipped to me..
First gen. Z/28 could not be ordered with auto tranny, air conditioning and not available as a vert.
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Old 03-27-2013, 09:28 PM   #33
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Um. WOW! I know what Camaro I will be upgrading to in the near future!!
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Old 03-27-2013, 09:29 PM   #34
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Old 03-27-2013, 09:55 PM   #35
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500 at the crank... how much get to the wheels? 425... 450? Will this have the same Z06 transmission that the 1LE has?
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Old 03-27-2013, 10:08 PM   #36
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Old 03-27-2013, 10:08 PM   #37
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Well.. acording to some of the latest info it is said that GM fixed the head issues for the 2012 year. Time will tell.

Also.. a ls7 in a c6 puts down around 440rwhp. This car is still not sae rated and in a different chassis with a different drivetrain. The number could go up or down however 440rwhp is what I would expect.

With a 3820lbs car (-300lbs. than a zl1) she should perform close to a zl1 in a straight line but according to the marketing the z28 is 3 seconds faster on the track. A second is almost an eternity... 3 seconds is just bananas!!!!! No ford pony car can touch that... not even the 700hp (real hp) gt500.
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Old 03-27-2013, 10:20 PM   #38
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Originally Posted by 5thGenIndy500 View Post
Hmmmm no HID, no LEDs, no cushion in the rear seats, no speakers and they even removed the wiring to save a pound. So it’s not going to be easy to retrofit. Did I miss something or couldn’t you always order the Z28 RPO with all trim levels and an automatic?? What about a Z28 Vert?? Finally after waiting for what seemed a lifetime for the Z28 to return it comes in only one limited model flavor… If one can only afford one Camaro, and one wants to take it to the track and make use of it for anything else I guess one must rough it! Seems to me what should have been done to the ZL1, the Z28 was more of a masses car. It just seems flipped to me..
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.
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Old 03-27-2013, 10:23 PM   #39
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Originally Posted by wildpaws View Post
That would be correct, the 302 shared the 4" bore and blocks with the 327 and 350 engines, the 302 ci displacement was obtained by using the shorter stroke 283 crankshaft. Whoever did that article for the LS7 needs to do a serious re-write!
Clyde
Yeah, whoever wrote that got it backwards. The first 302s were created using 327 blocks and 283 crankshafts.
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Old 03-27-2013, 10:58 PM   #40
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LS7

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?
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Old 03-27-2013, 11:03 PM   #41
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...With a 3820lbs car (-300lbs. than a zl1) she should perform close to a zl1 in a straight line but according to the marketing the z28 is 3 seconds faster on the track. A second is almost an eternity... 3 seconds is just bananas!!!!! No ford pony car can touch that... not even the 700hp (real hp) gt500.
Amazing what the extra cornering grip, killer brakes, and lighter weight will do! Does anyone know which track Chevrolet was using when they said the Z/28 is 3 seconds per lap faster than the ZL1? Maybe VIR, I was thinking...

Wonder what it would do with a few improvements from Katech?
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Old 03-28-2013, 02:14 AM   #42
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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
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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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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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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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About Time!!!
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