07-24-2015, 11:03 AM | #15 |
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I just threw 15% out there because it is a typical ball park number and using that it is still far off. It shows a 10% drivetrain loss, not 12%, which seems like something is up to me.
Edmunds gets 411hp/ 407tq on 91 octane http://www.edmunds.com/car-reviews/t...dyno-test.html |
07-24-2015, 11:45 AM | #16 |
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I doubt the LT1 is underrated in the Corvette. But there could be differences in the output of the LT1 in the Camaro. I do remember the LLT V6 was rated at 304 in 2010 and then 312 in 2011 after it was re-certified.
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07-24-2015, 11:51 AM | #17 | |
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07-24-2015, 01:20 PM | #18 | |
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Its widely believed that Edmunds uses a 'happy dyno', ie a dyno that makes the customer happy because they get a nice big number. Except that GM has already said that the LT1 is certified to make 455 hp in the Camaro. I don't think they were advertising the 304 hp on the 2010 Camaros as being SAE certified, because that would be inaccurate.
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07-24-2015, 02:07 PM | #19 |
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The LLT was never "rated" at 304, that was an estimate. Once it was certified, it was published at 312. Back then, the 2010 Camaro guys were wondering if the 2011 LLT had changes that lead to the increase in HP. Chevy came out and stated that the 304 number was an estimate, and that all LLT Camaro owners (2010 and 2011 at that time) had a 312 Certified HP engine.
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07-24-2015, 02:08 PM | #20 |
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I think in 2009 they were saying "estimated 304"
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07-24-2015, 02:24 PM | #21 | |
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07-24-2015, 02:44 PM | #22 |
The ZF gearbox is amazing at putting power to the ground.
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07-24-2015, 02:51 PM | #23 |
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07-24-2015, 04:14 PM | #24 |
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What difference do dynos make? They will all tell you something different.
Let's see some 1/4 mile MPHes. Then we will have a better idea.
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07-24-2015, 04:57 PM | #25 | |
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Just think about it for a minute and realize why applying a percentage is just that much more inaccurate with a high hp car. It's a random guess based off of a chassis dyno reading with a shit ton of variables. It's a crap shoot. Personally I think the sae certification is more accurate. But everyone wants to think their car is special lol. Every motor put in the hellcat makes between 700-715 hp. Around plus or minus 1% of 707. |
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07-25-2015, 05:18 PM | #26 |
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Its funny how every few years a engine comes out and people think its underated. This is not the 50's-2000's anymore. Chassis dyno's are a tuning tool and can be a good power measurement for adding aftermarket parts on the same day. Otherwise there are wayyyyyyy to many variables to get a accurate crank power rating from it. I have seen some shops report a measurable change in rwhp on the same exact car, dyno, everything, only days apart.
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07-25-2015, 06:13 PM | #27 | |
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My two cents. Laborsmith |
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