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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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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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fwhp.
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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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Old 03-09-2009, 04:14 PM   #15
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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
and the new hemi's aren't even real hemi's.
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Old 03-09-2009, 04:16 PM   #16
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and the new hemi's aren't even real hemi's.
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Old 03-09-2009, 04:42 PM   #17
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and the new hemi's aren't even real hemi's.
And don't forget real Chargers only have 2 doors.
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Old 03-09-2009, 04:48 PM   #18
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we all know that....we werent talking about competition in here just dyno....and the gxp is faster by .1 seconds....not that serious...
Depends on what magazine you look at I suppose. My point was just that a dyno number alone doesn't tell you very much. So if the Camaro faithful are worried that their car will only dyno 370 to 380 RWHP, it doesn't really matter.

And aren't you the Kevin that was seriously considering the Challenger? Did you ever get one or are you waiting for the Camaro?
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Old 03-09-2009, 10:46 PM   #19
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Depends on what magazine you look at I suppose. My point was just that a dyno number alone doesn't tell you very much. So if the Camaro faithful are worried that their car will only dyno 370 to 380 RWHP, it doesn't really matter.

And aren't you the Kevin that was seriously considering the Challenger? Did you ever get one or are you waiting for the Camaro?
yea i agree with you...

and yes i had a challenger on order and the dealer turned out to be a typical dealer and i canceled and decided to see what they do with the challenger in 2010....and if in the meantime i can get a great deal ill go for it...but yes the camaro is a option....but not likely
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Old 03-11-2009, 03:22 PM   #20
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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.
Yeah, but those tests were completely different and not representative of real-world conditions. I believe many tests like that didn't have the exhaust system intact, no accessories, no air filter, and a bunch of stuff like that. Like another person said, there are correction factors that can be altered and conditions that could account for those numbers. ZL1s were rated to close to and above 600 horse too, but that was with a different tune, headers, no accessories, etc. Nowadays, there are so many differences that I BET the modern HEMI gets very close (well, within 50 horse' or so) to the second generation HEMI if tested in the same fashion. It's not representative though of driving the car on the street. If you look at the ET and trap speed of those cars, they were pretty similar to the likes of many COPO GM cars and a few Fords. Anyhoo, it seems that those numbers are pretty inflated or the information misrepresented. No biggie though.
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Old 03-11-2009, 07:52 PM   #21
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and the new hemi's aren't even real hemi's.
It's not called the modern Hemi for nothing, Theses so called non-real Hemi's makes more HP per liter than the old hemis
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Old 03-11-2009, 08:01 PM   #22
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It's not called the modern Hemi for nothing, Theses so called non-real Hemi's makes more HP per liter than the old hemis
you beat me too it.
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Old 03-11-2009, 08:08 PM   #23
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you beat me too it.

I mean I hate how they say it, it's like Chrysler just cut the sphere in half and just bolt them to the engine


the new spheres are way more unique and efficient then the Hemi's from past time, they were Engineered that way
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Old 03-11-2009, 08:35 PM   #24
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I mean I hate how they say it, it's like Chrysler just cut the sphere in half and just bolt them to the engine


the new spheres are way more unique and efficient then the Hemi's from past time, they were Engineered that way
they were Engineered based off of LS heads.
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Old 03-11-2009, 08:36 PM   #25
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they were Engineered based off of LS heads.
that is opinion not fact.
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