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2007 Z51 LS2 Corvette vs 2008 Z51 LS3 Corvette

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Old 10-27-2017, 07:39 PM   #161
5knives
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Ahh man, here I was finally accepting the fact that the LS3 is a better engine than the LS2 until a GM personnel made the following comment: "I dyno tested LS engines when I worked for GM. Bottom line is you can beat the snot out of an LS2 for 72 hours, and it makes more HP, more TQ, less crankcase pressure and less blowby as the test proceeds. You can literally compare run data from 1 hour into test against data 2 hours into the test and see an improvement. Likewise between hour 72 and hour 71. Conversely, the LS3 would ****** a wristpin out of a piston ~23-25 hours into the same test. LS2 is far superior based on my direct experience testing both."

Man good thing I did not go sell my LS2 and get an LS3.
​​​​​​You're talking about a "minimal difference" of 49 hours. That's "barely" superior.
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Old 10-27-2017, 07:40 PM   #162
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How does he know this person is a GM employee? How does he know this person actually did what he said? And, how many engines of each were tested? Pretty sketchy evidence.

What is not sketchy, however, is the real life driving experience of hundreds, if not thousands, of people on this forum, and others. I have yet to hear of an LS2 OR LS3 engine failure that did not have some root cause related to the operator.

I am sure people have spun bearings, or snapped rods, or other such failures. But if the failure appears to be so low that it is almost unheard of, what does it matter what some guy beating the crap out of engines for 72 hours determined?
I was being sarcastic. 👍
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Old 10-27-2017, 10:57 PM   #163
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​​​​​​You're talking about a "minimal difference" of 49 hours. That's "barely" superior.
.....I see what u did there
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Old 10-28-2017, 11:01 AM   #164
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Good deal on the ls2 for 16k i wish i could of found that deal. I was looking for an ls3 c6 for some months and to get one with low miles was 5 to 6k higher than low milage ls2. I have to buy my girl a truck and with my budget i can get her a truck for 15 to 20k and my car for around 20k. I really wanted to get c6 zo6 but the price increase is about what her car is going to run me. I wound up buying 07 m6 with 14k for 22k bought from a 65 year old man who took great care of car. I think if price is no issue go ls3 for sure if on a budget get an ls2. I plan to put an ecs kit and exhaust this spring and just enjoy it. Love the car. I do plan on buying a c6 z in two years because i think they are the bees knees.
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