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Old 03-08-2009, 02:11 PM   #1
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Stock SRT Challenger Dyno's 420 to the wheels.

Is this real?





If it is Dodge has seriously underrated their 6.1L HEMI engine...
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Old 03-08-2009, 02:16 PM   #2
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Yeah, Dodge underrates. The 5.7 is rated at 370 for the Chally, but it's more like 390.
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Old 03-08-2009, 02:17 PM   #3
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Yeah, Dodge underrates. The 5.7 is rated at 370 for the Chally, but it's more like 390.
Yea but for the SRT to dyno at 420 it would have to be in the 450-500 range depending on % loss
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Old 03-08-2009, 02:19 PM   #4
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Originally Posted by GatorBlue371 View Post
Is this real?





If it is Dodge has seriously underrated their 6.1L HEMI engine...
If it is real its not stock, maybe a Diablo and some long tube headers etc..you can look at alot of reputable tuners dyno sheets and see how they got to that number.
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Old 03-08-2009, 02:19 PM   #5
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depends on the type of dyno, correction factor, etc etc. you can make a dyno read about whatever you want.

a dyno is nothing more than a tuning tool.
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Old 03-08-2009, 02:39 PM   #6
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If it is real it is not stock, the 2008 challenger srt-8 auto's do 355-360 at the wheels I think.
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Old 03-08-2009, 04:24 PM   #7
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Well since they just post that it made 420hp, and never got you close enough to the dyno screen to verify its anyones guess. Id have to say
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Old 03-08-2009, 04:34 PM   #8
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Old 03-08-2009, 11:55 PM   #9
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Old 03-09-2009, 01:33 AM   #10
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Old 03-09-2009, 01:53 AM   #11
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Not sure about modern HEMI engines, but back in the 60's the 425 hp rated motors were making upward of 600 hp on a dyno.
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Old 03-09-2009, 10:42 AM   #12
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Regardless of the dyno number, they are still slower than the G8 GXP. The Camaro being lighter than the G8, will be even faster.
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Old 03-09-2009, 10:46 AM   #13
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Regardless of the dyno number, they are still slower than the G8 GXP. The Camaro being lighter than the G8, will be even faster.
we all know that....we werent talking about competition in here just dyno....and the gxp is faster by .1 seconds....not that serious...
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Old 03-09-2009, 10:48 AM   #14
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Not sure about modern HEMI engines, but back in the 60's the 425 hp rated motors were making upward of 600 hp on a dyno.
you are right but the new hemis cannot be tuned the way the old ones were...you have to stroke these ...the 425 hp to 600 one you speak of is the old school 426 hemi engine...which was a 7L v8 which was quoted wayyyyyyyyyyy below its hp rating....that is why the new hemis can be stroked into a 392 or 426....or even a 440
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