610 HP

Jay Herbert

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The VCA Presidents and National Officers just returned from a pretty interesting field trip to CTC Dyno's and a presentation from SRT Drive Train Engineering.

With over ten pages of notes... it'll be a bit before all the info is available here, but here is the thing you'll really like:

610 HP @ 6000 RPM

591 lb-ft of torque (missed the RPM, it was as it went from 5600 to 6000)......

That's what we saw one of the engines doing during its testing.

How different is this engine? It's called a Gen IV in the presentations.
 

MikeR

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Cool, thanks for the info. It will be interesting to see what these things actually dyno at the rear wheels. and you mentioned Gen IV, so will the 2008 Viper be considered/called a GEN IV??
 

SnakeBitten

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Wow...The good news just doesnt stop coming....Now a lower weight announcement will make me lose consiousness....If this is the Gen iv engine maybe they are considering this a Gen IV Viper....

What are they gonna do for the 2010 Viper engine??...Add vvt to the intake side and bump hp to 700hp????
 
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Jay Herbert

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Good info. Anything on production dates???

we were told "Summer"


weight/price?

Nothing formally mentioned, but it was implied it would be similar to '06 car in both cases.




They spent a lot of time going over the specific changes in the engine
(for all practical purposes an all new engine and controller), and drive train. Tranny is a huge improvement, boy does it shift smooth (they had a car at the tech center we could sat in, sorry we did not drive it). Clutch effort is much lower, and the dif has a much better limited slip mechanism. All this leads to the ability to "stick" to the road and put that HP down W/O wasting it :)

Engine controller is capable of controlling the variable cam in 1 millisecond loops.... a very powerful controller.... The CNC combustion chambers and ports of the heads are done in a process that rotates the heads in conjunction with the machining. Pretty wild video was shown, hoping to get permission to post it. They said for all practical purposes, if similar CNC heads were done in the after market, it would be a $5000 machining job.

They really pulled out all the stops on the engine, bigger valves (intake valves are hollow to reduce mass) changed the valve angles and even offset the rockers to allow better flow, CNC heads, custom casting to allow CNC'ed throat and valve guides matching to smoother ports, valves are siamesed with keyed seats, dual electronically controlled throttles (now 74 mm) using DC stepper motors, dual mass flow air sensors, two piece plenum, coils for each plug, revised air cleaner that flows more, swing-arm oil pickup with baffled oil pan, high volume/capacity oil pump (needed to "power" the variable cam actuation), Pistons are out of the 6.1 Hemi and more.

Result? 23% more flow on the intake side, and 12% more flow on the exhaust side over the Gen III engine.

The engine sure sounded awesome on the Dyno and when "blipped" over 6000 RPM some saw a flash of 618 HP :)
 

dblankenbaker

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Unless the chassis has changed, I would call it Gen 3.5

Gen 1 = Gen 1 chassis + Gen 1 engine
Gen 1.5 = Gen 2 chassis + Gen 1 engine
Gen 2 = Gen 2 chassis + Gen 2 engine
Gen 3 = Gen 3 chassis + Gen 3 engine
Gen 3.5 = Gen 3 chassis + Gen 4 engine
Gen 4 = Gen 4 chassis + Gen 4 engine
 

ivanrho

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The weight of the engine is slightly heavier, however, the new Viper has lost some weight due to the loss of Run-Flats. No spare; just a bottle of fix-a-flat.

Also, heard from an engineer that the drive-line losses are anywhere from 8-12%.
 

SweetRed04

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The VCA Presidents and National Officers just returned from a pretty interesting field trip to CTC Dyno's and a presentation from SRT Drive Train Engineering.

With over ten pages of notes... it'll be a bit before all the info is available here, but here is the thing you'll really like:

610 HP @ 6000 RPM

591 lb-ft of torque (missed the RPM, it was as it went from 5600 to 6000)......

That's what we saw one of the engines doing during its testing.

How different is this engine? It's called a Gen IV in the presentations.

Sorry to disappoint but your torque number is wrong given the claimed max of 600 or 610 HP and your claimed RPM range.

The max possible torque for 610 HP at 5600 rpm is 572, at 6000 it is 534. The numbers are slightly less if 600 HP.

HP= (Torque x RPM) / 5252

The only specs I had seen show the increased HP is made be extending the torque band UP the RPM band increasing HP.
 

03gobluecobra

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The VCA Presidents and National Officers just returned from a pretty interesting field trip to CTC Dyno's and a presentation from SRT Drive Train Engineering.

With over ten pages of notes... it'll be a bit before all the info is available here, but here is the thing you'll really like:

610 HP @ 6000 RPM

591 lb-ft of torque (missed the RPM, it was as it went from 5600 to 6000)......

That's what we saw one of the engines doing during its testing.

How different is this engine? It's called a Gen IV in the presentations.

Sorry to disappoint but your torque number is wrong given the claimed max of 600 or 610 HP and your claimed RPM range.

The max possible torque for 610 HP at 5600 rpm is 572, at 6000 it is 534. The numbers are slightly less if 600 HP.

HP= (Torque x RPM) / 5252

The only specs I had seen show the increased HP is made be extending the torque band UP the RPM band increasing HP.

I think his RPM band is not where the peak torque was. I remember reading the RPM the peak torque appeared at being in the 4000-4500 range, but can't remember exactly. At that RPM range this peak torque would be possible.
 
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