07-24-2016, 09:45 AM | #57 |
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As much as we would all like to see a higher stock LT4 number, I think it will be doubtful from GM. The limiting factor may be the smaller pullied 1.7L blower and the heat it generates. The Corvette Guys were left with an inefficient design, that Cadillac improved on, and Chevy probably solved in the new ZL1.
The C7 ZO6 Guys are already Installing an aftermarket blower and intercooler to push past what they've been given.
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07-24-2016, 10:42 AM | #58 | |
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Just curious since the claim now is that the ZL1 should be an improvement but does anyone really know that? I think not. |
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07-24-2016, 12:14 PM | #59 |
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Not sure what you are asking, but if you are referring to heat soak issues in the C7 Z06. There are several threads on Corvette forums and independent tests where the Car Goes into limp mode during heat soak after 1 lap during track days.
The 3rd gen CTSV has the same motor with better cooling in a heavier platform. These new Caddys arent seeing this, but there are a lot less on the Road and not many owners running them on road course track days. If you look how low the LT4 has to sit in the C7 Z06 and the limited front end cooling compared to the 3rd gen CTSV and new ZL1, those are some of the differences on how GM is solving the heat this small pullied blower makes.
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07-24-2016, 12:53 PM | #60 | |
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We've seen that the 2017 CTS-V and ZL1 will get a taller lid and the Z06 will also get changes. I'm hoping there will be bump in power associated with the "other changes".
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07-24-2016, 01:24 PM | #61 | |
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07-24-2016, 01:28 PM | #62 | |
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07-24-2016, 02:12 PM | #63 |
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the main problem with chevy´s Z06 is due to its bad eficiency with only 2valves/cyl.
The rest goes through heat and have to be cooled down which gives the next problem in small chassis. And as a top of bad engineering they put on a to small high revving blower which heat up the inlet air more than it should be. I swear Fords coyote with a 2.9 ltr. whipple would do much better in the Corvette with no overheating and same cooler size. |
07-24-2016, 02:26 PM | #64 | |
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EDIT: Only the Porsche 918 for $845,000 can match its track time and lack of gas guzzler. And we all know how Audi made its engines more "efficient". The issue is over spinning a 1.7L PDB + a low hood and limited front section. Tadge says he and the engineers have it solved for 2017....we'll see. Last edited by cvp33; 07-24-2016 at 03:51 PM. |
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07-24-2016, 03:52 PM | #65 | |
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07-24-2016, 05:20 PM | #66 | |
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07-24-2016, 09:30 PM | #67 | |
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I truly believe the new ZL1 and current CTSV have solved the overheating issues that are effecting the C7 Z06 when run hard on track days. GM put a heat protect mode in this Vette and also didn't allow it to be reved over 5000 rpm during the break-in period. That tells me they knew they had a problem but still had to build safeguards in the design to protect against excessive warranty claims. I believe we are going to get the 3rd and best iteration of the LT4 design and packaging inside an outstanding platform. I wouldn't worry about it.
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07-25-2016, 12:50 PM | #68 |
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The 1.7 makes more hp/torque under the curve than the 2.3, that's why they went with that blower.
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07-25-2016, 03:35 PM | #69 | |
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The heads are not even on the list of problems with the Z06. The small chassis is one of the positives of the Vette although it doesn't help the cooling issue. The high revving blower is an issue. I'm not sure the coyote with S/C would fit without doing some of the things they are doing anyway to fix the heat issues in the Corvette.
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07-30-2016, 09:17 AM | #70 |
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I believe we have our answer
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