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Old 09-25-2009, 10:10 AM   #76
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Definitely the LSA, which is great so long as this car does not weigh more than 4000
Think of it this way, there are "other" cars out there that weigh more. But on the flip side there are others that weigh less Lets hope GM gives her some CTS-V leggs to help it out.
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Old 09-25-2009, 03:11 PM   #77
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People can dog it all they want i still preffer the LS7. First its a 505hp engine, the lowest of the three but easily can be bumped above 560hp with just cam and heads, also i preffer an all motor car over a supercharged car its just that much more impressive, on top of that the LS7 is built with a lot more durable materials than the LSA, and last but not least, how f*ckin cool would it be to be able to say "yeah, my Z/28 came stock with a 427" ^_^ Im just not a fan of the LSA, its just a de-tuned LS9 with cheaper parts, so i say why half-ass it ya know?

If not the LS7 or the LS9 then i say GM develope an entirely new engine for the Z/28, a lighter, higher revving, higher output version of the LS3 with more durable parts, that'd be pretty awsome to have a Z/28 specific engine like the Z/28s of yore haha...also they should put an emphasis on building the Z with lighter parts, shave as much as you can by using the lightest materials possible while keeping it extremely durable, i think we can all agree to that yeah?
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Old 09-25-2009, 04:00 PM   #78
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People can dog it all they want i still preffer the LS7. First its a 505hp engine, the lowest of the three but easily can be bumped above 560hp with just cam and heads, also i preffer an all motor car over a supercharged car its just that much more impressive, on top of that the LS7 is built with a lot more durable materials than the LSA, and last but not least, how f*ckin cool would it be to be able to say "yeah, my Z/28 came stock with a 427" ^_^ Im just not a fan of the LSA, its just a de-tuned LS9 with cheaper parts, so i say why half-ass it ya know?

If not the LS7 or the LS9 then i say GM develope an entirely new engine for the Z/28, a lighter, higher revving, higher output version of the LS3 with more durable parts, that'd be pretty awsome to have a Z/28 specific engine like the Z/28s of yore haha...also they should put an emphasis on building the Z with lighter parts, shave as much as you can by using the lightest materials possible while keeping it extremely durable, i think we can all agree to that yeah?
How's that LS7 going to do emissions and fuel economy-wise? I believe LS7 does have better economy than LS9, but LS9 has more than 120 horses on top of LS7. LS7 heads are already CNC'd and flow like 360+ cfm at like .600" lift. This side of going with some canted valve ETPs or something, I'm not sure there's going to be many more cylinder heads that would even compare to those ETPs; and they look like they need cams with .700" of lift in order to take advantage of their design and probably just as radical duration, and that probably won't fall in-line with smog regulations, let alone the drivability/pleasability standards GM sticks to for their prospective 'Vette drivers. I believe even the 6-bolt GMPP heads they use on the LSX454 are based right off of LS7 heads. I'm sorry - it's strictly my opinion that GM can not make a 427 Gen IV that would be of comparable performance to LSA, not to mention cost. I wish they could, but I think Z06 is the last big-displacement car we're going to see in a car from GM. There are too many more advancements with DI and FI on smaller engines that do at least as good a job as a big displacement engine.

JMVHO.
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Old 09-25-2009, 04:10 PM   #79
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Yeah i didnt even think about emissions and stuff, idk its just my prefference of N/A cars speaking mostly :P

How about a new Z/28 specific engine? A smaller displacement, higher revving engine than the LS3 which would also help on weight savings and give a nice throwback to the old Z/28s (thats another thing i didnt take into account, weight of the LS7 verses weight of the LSA)

In the end all LS engines are true marvels of modern engineering anyways xD
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Old 09-25-2009, 04:14 PM   #80
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Yeah i didnt even think about emissions and stuff, idk its just my prefference of N/A cars speaking mostly :P

How about a new Z/28 specific engine? A smaller displacement, higher revving engine than the LS3 which would also help on weight savings and give a nice throwback to the old Z/28s (thats another thing i didnt take into account, weight of the LS7 verses weight of the LSA)

In the end all LS engines are true marvels of modern engineering anyways xD
I TOTALLY hear you on the emissions/economy BS I love how LS7s sound. It'd be cool if we didn't have to worry about that crap and just drop a 620+ horse' LS7 in Z28 and have Ford put that in their pipe

I'm all for a specific engine. I just want the performance of LSA/LS9 Okay - I'd prefer a V8, but won't cry too lound
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Old 09-25-2009, 04:25 PM   #81
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haha yeah, i think itd be great to have all the old principles of the Z/28 back, the lighter higher revving engine with major emphasis on weight and handling, which would make a Z/28 specific engine amazing...i just doubt GM would put the time and money into it just to have it in one trim level of one car in their whole fleet =/ laaame lol

the LS7 is my favorite of the three proposed but id be in favor of any of the three, especially if it keeps costs down id like to see weight comparisons for all three engines
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Old 09-25-2009, 04:31 PM   #82
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Yeah - I bet that LS7 is mid-400s, and isn't LSA like 550, and I bet LS9 is closer to 600 with that bigger SC and such.

What happened to the "Good 'old days" I've read/heard so much about, lol
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Old 09-25-2009, 04:34 PM   #83
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haha ohhh yes, the old 302s in the 69' Z/28s were reported to get around 450hp from customer experience (GM rated at around 290hp LOL)...hmm, now im interested, i gotta find these weight comparisons xD
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Old 09-25-2009, 05:13 PM   #84
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haha ohhh yes, the old 302s in the 69' Z/28s were reported to get around 450hp from customer experience (GM rated at around 290hp LOL)...hmm, now im interested, i gotta find these weight comparisons xD
One of Chevy's own dyno tests for their 302 Z/28 engine dated 8/2/67 showed a single four barrel version with 440 HP @ 7400 RPM and the two four barrel version with 468 HP @ 7400 RPM, the fuel injection version (which was never put into production) was 470 HP @ 7400 RPM. According to the data sheets accompanying these tests, they were using Traco Racing prepared heads rather than the stock heads, otherwise the engines appeared to be stock.
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Old 09-25-2009, 05:14 PM   #85
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sometimes when it comes to cars...you just have to lie lol
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Old 09-25-2009, 05:19 PM   #86
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at least we get the real numbers nowadays LOL, i just wish it was like the old days where there was a racing series that made production of these cars essential =/ at least we got all three makers in competition to give us, the consumers, the ultimate win

By the way...you gotta wonder, where will the line be drawn in these cars? 600hp cars from the factory, jeese...what about 800? 900?...dare we cross quad-digits 0_0 LOL
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Old 09-25-2009, 05:23 PM   #87
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I hope not :( I want my car to be King! *pouts*
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Old 09-25-2009, 05:26 PM   #88
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Wait wait...i meant 900hp Camaros from the factory XD

...FOR FOURTY GRAND! XD

Do we dream too much in these threads? lmao
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Old 09-25-2009, 05:27 PM   #89
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you forgot key to the city
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Old 09-25-2009, 07:40 PM   #90
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My key's outdated :(
LOL
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Old 09-25-2009, 11:17 PM   #91
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OH, i just learned the LS7 concept Camaro that was shown at SEMA actually had a "slightly modified 586hp LS7" so obviously its very simple to push this thing beyond the LSA on all motor...ehh, looks like im swaying back in favor of the LS7 powered Z/28 again, im sorry there's just something about "all motor 427 Camaro" that sounds so magical
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Old 09-25-2009, 11:56 PM   #92
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Maybe it'll be a new engine, the LSB
same design but uses a 1.8L whipple or KB.
more compact, quieter, more efficent, equal if not better boost and cooler charge.

hmmm
also hmmm
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Old 09-26-2009, 08:25 AM   #93
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Originally Posted by Vega View Post
Yeah i didnt even think about emissions and stuff, idk its just my prefference of N/A cars speaking mostly :P

How about a new Z/28 specific engine? A smaller displacement, higher revving engine than the LS3 which would also help on weight savings and give a nice throwback to the old Z/28s (thats another thing i didnt take into account, weight of the LS7 verses weight of the LSA)
Well in Grand AM and soon in the American Le Mans there are 5.0L LSx engines that produce 500+HP that rev to about 7000k+. But that throws the NVH, fuel econonmy, refinement, emissions, and all that good stuff that you never heard of in the sixties out the window.

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In the end all LS engines are true marvels of modern engineering anyways xD
Totaly agree!
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Old 09-26-2009, 03:51 PM   #94
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Ah man, now you got me thinking about how awsome it would be to have the old Z/28 302 back with 500+ horsepower xD
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Old 09-26-2009, 05:16 PM   #95
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Ah man, now you got me thinking about how awsome it would be to have the old Z/28 302 back with 500+ horsepower xD
Here's a link to an article with an LS1 built to 302cid as a tribute to the first gen. 302, 435hp @ 6,000 RPM. I could see something like that with higer rev limits going 500HP plus.
http://www.superchevy.com/features/c...302/index.html

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Old 09-26-2009, 06:06 PM   #96
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Here's a link to an article with an LS1 built to 302cid as a tribute to the first gen. 302, 435hp @ 6,000 RPM. I could see something like that with higer rev limits going 500HP plus.
http://www.superchevy.com/features/c...302/index.html

Clyde
That's amazing, LOL, i wish they'd do builds like this for the new Z/28, although with 435hp thats just like 10 extra over the LS3 so they'd have to either up that or else put a LOT of emphases on lightening the car, either way thats a really cool article
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Old 09-26-2009, 09:12 PM   #97
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uhg thank GOD, i wanted to shoot myself in the face after all the trouble i went through to find these numbers but i finally got them, so here's the weigh in!

LS7 - 458lbs
LSA - 467lbs (dry)
LS9 - 530lbs (dry)
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Old 09-27-2009, 09:32 AM   #98
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The Z-28 Motors of Old

Assuming that the Z/28 will not just be cosmetics and will be, instead, performance based, what available options, motor wise, are there that would be in the small block category (sorry, I have not kept up with GM motors)? I like what Vega had to say about the 302's. The Z/28s of old were relatively light and nimble. Putting 427 motors in them would make them as nose heavy as the GT500. A small block would shave weight and still leave the potential for supercharging it to power levels that are not destructive to the motor but very impressive on the track (I am thinking road course here). Thanks in advance for any light you can shed for me on the motor choices.

Jim
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Old 09-27-2009, 02:03 PM   #99
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6.4 Liter HEMI is due next year, I would prefer the LS7, everybody's not into FI you know..... it's all about Motor
Right on man, i hear ya...i know i know, spare me another "The LS7's on its way out man" speech, lol, i just honestly think the LS7 would be a better choice, and we know GM is considering it because look what they took to SEMA, the SEMA LS7 Concept Camaro, it wasnt an LSA Concept Camaro, LOL, and that car netted 586hp with a simple hotcam swap which we know GM can mass produce the engine like that...plus i mean who wouldnt love to see the Z/28 own the GT500 with an N/A engine? Not to mention the LS7 is 100+lbs lighter than the LSA (after liquids added)
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Old 09-27-2009, 07:05 PM   #100
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LS7 would be the WORST base...no FI common its probably going to be the LS9 or LSA although in mvho i dont think they should even use an LSx
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