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View Poll Results: Your guess for the Z28 LSA HP rating | |||
Less than 556 HP | 95 | 13.63% | |
556 HP | 159 | 22.81% | |
More than 556 HP | 386 | 55.38% | |
We don't even know if the LSA is going to be in the Z28! Stupid question! | 57 | 8.18% | |
Voters: 697. You may not vote on this poll |
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01-07-2011, 07:41 PM | #99 |
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01-07-2011, 09:10 PM | #100 |
I used to be Dragoneye...
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I don't think they'll release a Z28 intent of competing against the GT500 that's maxed out.
Given that this is to be the pedestal-standing Camaro for a good solid 3 years, yet..."Let down" or "good enough" are not the kinds of phrases the engineers and designers have in their vocabulary. |
01-07-2011, 09:29 PM | #101 | |
1st Civ. Div.
Drives: Camaroless for now...RIP "Big SexZ" Join Date: Dec 2007
Location: Savannah, Ga
Posts: 2,723
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Quote:
GM also said at the introduction of the LSA and the LS9 engines was that the first big main difference from the two engines was the supercharger's size, 1.9L for LSA and 2.3L for the LS9. The second big difference was that the LSA had a more efficient single brick intercooler compared to the LS9's dual brick intercooler on lowering the forced air temp. This was done on the LS9 to keep the hood design low which the camaro does not have an issue with since its cowl height is not as low as the corvette's. The third is of course the forged pistons in the LS9 compared to the hypereutectic pistons in the LSA which was used because they are quieter and are much more tolerant on emissions especially start-up compared to the forged ones of the LS9. The hypereutectics in the LSA are pretty durable and can withstand a lot of punishment while producing high hp levels. Hypereutectic Aluminum Pistons with Oil-Spray Cooling Superior piston design sets the tone all of the 6.2L LSA's internal components. The engineering objective? Lighter, stronger and smoother. The pistons themselves are aluminum-cast from a high-silicon alloy developed for its combination of strength and heat-management properties. Casting reduces noise-generating potential, compared to other high-performance piston materials such as forged aluminum, and is specified when NVH control is a priority. The hypereutectic pistons are also lighter than conventional steel, which translates to less reciprocating mass inside the engine. Less mass means greater efficiency, high-rpm capability and a feeling of immediate response as the engine builds revs. The LS9s pistons are made of forged aluminum. The key difference in material choice here, is the desire for refinement in the Cadillac application. The combustion surface of the LSA pistons, or the top land, lacks the valve-relief pockets typical on high-performance engines with relatively high-lift valves. Rather, the LSA top lands are sumped, with a saucer-shaped indent that dips gradually from the outer edge of the piston. This design promotes a thorough mixing of air and fuel, and along with other durability enhancing features, allows a 9.1:1 compression ratio: higher than a conventional supercharged or turbocharged engine, for improved combustion efficiency. The durability enhancements include an anodized top land, which reduces wear and helps deflect heat generated during combustion away from the LSA's bottom end. To further reduce wear, the piston skirt is coated with a polymer material, which limits bore scuffing, or abrasion of the cylinder wall over time from the piston's up-down motion. The polymer coating also dampens noise generated by the piston's movement. The wrist pins, which attach the piston to the connecting rod, were developed for maximum durability, with a large outer diameter and a tapered inner diameter. These pins "float" inside the rod bushing and pin bores in the piston barrel. Compared to a conventional fixed pin assembly, in which the connecting rod is fixed to the piston's wrist pin while the pin rotates in the pin bore, the floating pins reduce stress on the pin. They allow tighter pin to pin-bore tolerances and reduce noise generated as the piston moves through the cylinder. The benefit is less engine wear, improved durability and quieter operation. Valves are among the most heat-stressed parts in an engine, and their wear resistance is crucial to long-term durability. Those in the LSA are manufactured from a high-chromium steel alloy called SilChrome 1 (The only difference between the LSA's exhaust valves, and the LS9s is that the LS9's are filled with sodium for the extra heat protection -- the LS9s intake valves are made of titanium.), with thicker heads than most other Gen IV V-8s. They promote heat transfer away from the valve face and valve guide to the cooler end of the stem, where it more readily dissipates. This maintains a lower, more uniform valve temperature, reducing wear on the valve guide for better alignment and a consistent seal between the valve seat and valve face over the life of the engine. Finally, the 6.2L LSA represents the first line of small block V-8s equipped with oil-spray piston cooling. Eight oil-squirting jets in the engine block drench the underside of each piston and the surrounding cylinder wall with an extra layer of cooling, friction-reducing oil. The oil spray reduces piston temperature, promoting extreme output and long-term durability. The extra layer of oil on the cylinder walls and wristpin also dampens noise emanating from the pistons. I don't think the Z will get the titanium connecting rods or sodium filled valves from the LS9 but you never know. Stock for stock the LSA is a more durable engine test wise compared to the LS9 as was stated by GM at the debut. Regarding quality and durability, the 6.2L Supercharged LSA has been validated beyond 100,000 miles and accumulated more the 6,400 hours of dynamometer testing. It has run over 270 consecutive hours at wide-open throttle without a failure. (The LS9 has only accomplished 100 hours of this sort of testing!!!) It's been road tested in the world's extreme climates and track-tested under racing g loads on some the world's most demanding circuits. It has completed actual and simulated 24-hour track tests. And just because the LS9 is rated at 638 now does not mean that it would not be bumped up a little to provide the Z/28's engine a little breathing room for it's hp rating. The prototype Z/28 pic below looks to have a much taller intercooler cover with well defined twin riser to maybe house a taller version of the LS9 intercooler twin bricks for better combustion inlet temps. The stock LSA as installed in the CTS-V has a rev limiter @ 6200 rpm yet it was shown to make more power well past 6600 rpm and was still climbing from this post from another site: http://www.ls1tech.com/forums/genera...sa-engine.html I think the Z/28 engine will not have a rev limiter of 6200 rpm but of one much higher. It showed 451 hp @ 6200 and 485 hp @ 6600 with rev limiter raised or removed, thats a 34 hp difference. The gm performance parts crate LSA has a recommended 6600 rpm fuel cutoff. Pics below are of the prototype Z/28 engine, then uncle Robin Lawrence's LSA stuffed camaro bottom left, and last but not least an LS9 stuffed camaro bottom right for comparison plus some side by side parts pics.
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Last edited by RLHMARINES; 01-09-2011 at 05:53 PM. |
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01-07-2011, 11:43 PM | #102 | ||
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Drives: '11 Mustang GT Premium Join Date: Oct 2010
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In my opinion, the Z28 will stick with the 556hp rating. GM doesn't have to fear the GT500, the 2012 MY has been finalized so no last minute upgrades will come from Ford. That being said, the '12 GT500 will have been released and sold out before the Z28 sees a dealership. If GM were to rate it higher and lets say Motor Trend compares the two to be dead even, it would make GM look bad. At 556hp, if it wins, it looks really good, if it ties, it looks good.. if it loses, the blame can go to weight and only having a 6hp advantage (torque is always overlooked).
Will the Z28 eat Corvette sales?.... What Corvette sales? and I hardly think that a buyer set on a Grand Sport is gonna pitch out extra cash for something he doesn't want... Z06/ZR1 people are Z06/ZR1 people.... they care nothing for Camaros... I honestly believe that GM might be benchmarking the Z28 to the wrong Mustang, by the time the Z28 is available, the GT500 will be done, the 5.4 will be gone... and Shelby will be out again... Since the 2012 GT500 is being built right now, MY13s top model will be ready for Jan 2012 and since it looks like the Z28 will be out fall/winter 2011, with the GT500s gone for over 8 months and a new model in route in 4... victory might go the way of tooting their own horn.. if only for a brief time (see below) Quote:
Here is a prototype TT 5.0 called EU-01, a collaboration between multiple companies.. They strap it to a dyno at 4:35, it made 552hp and 576tq.... at the wheels... Last edited by thePill; 01-08-2011 at 12:24 AM. |
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01-08-2011, 01:59 AM | #103 |
Drives: '10 Camaro SS Join Date: Apr 2009
Location: Gilbert, Arizona
Posts: 1,047
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575 hp
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01-08-2011, 06:57 AM | #104 | ||
juggernaut
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If gm is to test against a car that doesn't exist yet then how can they bench mark something that isn't out? GM is testing against what's out and improving beyond that. They should have the answer for current production, and wiggle room for any answer ford has to offer. keyword there is should. |
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01-08-2011, 10:59 AM | #105 | |
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Drives: '11 Mustang GT Premium Join Date: Oct 2010
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Posts: 1,268
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Quote:
Doing so, any victory could come as only a whisper in most eyes as did the '11 GTs victory over the '10 SS. I'm almost positive GM knows Ford intended to twin turbo the 5.0. It was even made quite public that the "Road Runner" was in the works, but Fords methods of product deception is just as comical, if not more than GMs. Ford went public with the TT 5.0 in October 2009 and in December '09 stated that "There will be no TT 5.0 for the GT500" and "There simply isn't enough room under the hood for TTs"... As I said before, Ford wasn't lying... the truth changed... There will not be a GT500 in production to receive the TT 5.0 and the TTs used on the 5.0 does not fit under the hood, it fits in the two identical notches on each side of the transmission Ford developed the GT with for some reason... Some people thought it was just clear space to service the transmission easier. Its an ideal placement of a Twin Turbo kit, it lowers the extra weight center and moves that weight mid vehicle. It also places the twin turbos directly in line with the dual exhaust. TT also produces power at a higher RPM allowing the Cobra to launch from a dig without blowing the tires off of 285s. A S/C creates a broad low end torque curve and puts power to the ground immediately where a TT spools slowly... It will launch like a GT but pull like a GT500. Up high though, a S/C is garbage and after a few laps, it becomes a disadvantage rather than a modifier. Europeans use turbos in road racing with great results. All that I am saying is, if you plan on building a Superbowl team or training a prize fighter, do not move your Z28 chess piece according to the GT500s build and game plan last year... Last edited by thePill; 01-08-2011 at 11:16 AM. |
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01-08-2011, 02:36 PM | #106 |
Not just any car!
Drives: Orange Krate DOB - 11/22/2010 Join Date: Oct 2009
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575 Horsepower
Doubt they will go 600 horse on this build. But they might not certify the HP right off, just like what happened with the V6. Politics and timing are everything. With the way gas prices are going... hmmm. That alone could hammer all sales. The gas companies are gonna put a death nail in any economic recovery as their greed overtakes logic.
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01-08-2011, 02:42 PM | #107 | |
Moderator.ca
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Quote:
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Note, if I've gotten any facts wrong in the above, just ignore any points I made with them
__________________ Originally Posted by FbodFather My sister's dentist's brother's cousin's housekeeper's dog-breeder's nephew sells coffee filters to the company that provides coffee to General Motors...... ........and HE WOULD KNOW!!!!__________________ Camaro Fest sub-forum |
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01-08-2011, 03:45 PM | #108 |
I think we'll see it in the 580-600hp range. Some people make some good points about comparing it to the CTS-V but they over look a lot of things as well. Like even if the Camaro has the same horsepower as the CTS-V its going to be a lighter car because the CTS-V is a luxury car and the Camaro is a performance car. You've got to remember that people going to buy the CTS-V (like the Corvette) are a different breed of buyers looking for a different kind of machine, they want performance and world-class luxury, Camaro buyers want a balls-out American performance legend, hell most of the reason they'll buy it is for the namesake alone. I never bought into the "higher performance in a lower car will kill the prices of lower performance in a higher car" idea. Plus GM knows that the Z28 is going to pull people to the showroom floor a LOT more than the CTS-V will, whether the buyer goes home with a Z28 or a Malibu that car will bring the customer in and GM isnt going to neglect it for some stupid sibling rivalry like that.
And all that being said i do believe it will be the LSA in the Camaro, because GM and everyone else has all but come flat out and said it, just stating what engine it is wont give everything away to the competition. Plus at this point everyone is so hyped about the LSA that GM feels it would be letting the car's fanbase down if it did anything other than the LSA. I personally am disappointed in this cause id much rather see an N/A Z28, id rather see the LS7 or a factory version of the LSX454 in it, im more of a fan of camshaft thump than supercharger whine, plus a headline like "N/A Z28 Beats Out Supercharged Shelby" would be more than satisfying to me haha. But alas, im not making the car and my oppinion doesnt really matter, even though there's equal N/A motors and better supercharged motors its still 98% sure going to be the LSA. |
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01-08-2011, 03:57 PM | #109 | |
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I think most muscle car guys preffer a broad torque range over high spooling turbos. Its all in the launch, if it doesnt snap your neck off the line and make all kinds of evil noises doing so then i dont want to buy it. And evil noises dont consist of wind-tunnel testing LOL. I dont really care about the top-end of my car because 99.9% of the time its not gonna be on a track, its gonna be launching from a stop light, and by the time i hit 80mph i'll be at another stop light, so i want to be able to smash that GT from light to light, not match it. Besides isnt there already a TT Taurus? Does it use the same transmission? That might be why it was designed like that, just for the Taurus with no intention of using TT in a Mustang. |
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01-08-2011, 04:09 PM | #110 |
Drives: 06 S/C GTO, 01 H/C/I Z06 Join Date: Dec 2009
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More then 556bhp. Im guessing it wont get the CTS-V 1900 series S/C and will be the larger 2300. 590hp!?!?
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01-08-2011, 04:13 PM | #111 |
Drives: SIM RS/SS L99 Join Date: Sep 2009
Location: Sunshine State
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Picture of the motor in the test car looks closer to the LS-9 intercooler than the LSA despite its label.
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01-08-2011, 08:25 PM | #112 |
Drives: 2002 Z/28,1968 Chevelle convert. Join Date: Oct 2010
Location: Phila.,PA
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I will guess the 2012 Z/28 will be 500-525hp(just a thought)..And if the 2012 Z/28 is going to be over 575hp I am going to cringe at what GM/Chevy will be asking price wise for this ride..I am going out on a limb and say it will be priced around the 2011 CTS-V.. I can bet GM knows that the 2012 Z/28 will be in demand, so I'm sure prices will reflect it..I just hate to see a Camaro going to be priced out of range of most folks,boo-hoo...
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