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VVT 5.7 Hemi

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Old Nov 26, 2007 | 11:07 AM
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Majin_Neon_00's Avatar
Majin_Neon_00
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Default VVT 5.7 Hemi

The next wave of Hemi's will indeed have VVT, most likely cam in block like the Viper has.

I was talking to a guy who works at the Chrysler, while i was at work, he was stressed out about his girlfriends car and he slipped the information out.

I asked about wither or not the engine would have 400 hp or round abouts and he said "Uh....umm" so his silence could be our direct confirmation.

I did tell him that i was going to post this on DF and he goes. "...Uh...erm...." He was on the phone so im sure that he was more than a little agitated.


 
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Old Nov 26, 2007 | 01:40 PM
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Default RE: VVT 5.7 Hemi

The news that the Hemi was getting VVT really isnt anything new, I remember hearing something about it at least a year ago...
 
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Old Nov 27, 2007 | 12:34 AM
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Default RE: VVT 5.7 Hemi

My question is if the 6.1L will receive this treatment or not. If so it should help remedy the fuel efficiency issue. That, the increased compression ratio, and updated transmission really helped the Viper in the fuel economy department.
 
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Old Nov 27, 2007 | 08:17 AM
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Default RE: VVT 5.7 Hemi

adding VVT will improve torque at lower 1500-2500 rpm
and re-adjusting the overdrive gear ratio
to take advantage of this added 'reserve torque' for passing or hill climbing
will improve the MPG on the highway
 
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Old Nov 27, 2007 | 10:07 AM
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Default RE: VVT 5.7 Hemi

He did say that this would be the 2009 Hemi 5.7's

I don't imagine that if they boost the power of the 5.7 to near 400 or 410 ish that the 6.1 would remain at 425, i mean what would be the point of an extra 25hp out of a much bigger motor?

I would imagine that if the 5.7 is getting VVT that the 6.1 would also, but then again the latter doesn't have MDS either.

So realisticly if they do boost the 5.7 to 400 expect the 6.1 to be near 500 but not over that bench mark.
 
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Old Nov 28, 2007 | 03:18 PM
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Default RE: VVT 5.7 Hemi

ORIGINAL: HankL

adding VVT will improve torque at lower 1500-2500 rpm
and re-adjusting the overdrive gear ratio
to take advantage of this added 'reserve torque' for passing or hill climbing
will improve the MPG on the highway
Yes that would definitely help. I think though that they are going to need a 6-speed to keep up with the current competition if not more.

The 6.1L doesn't have MDS for either one of two reasons that I have read. 1.the compression ratio is too high for this MDS system, or 2 the design of things is slightly different which does not allow for such a system at this time (this is more likely I think). There are some similarities between the new V10 and the 6.1L. I think the 6.1L will get some kind of update sooner or later. I would like to see both engines get the update for the Challenger and the next generation LX cars.
 
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