Lamboman your the King of the Vipers So Will the 2010 Viper have 680-700HP? How many 08's will you be getting?
LOL. Good to be King of something!! I will be getting 2 at this point. Lime Green with Black stripes and Dark Purple with white stripes.The '09 will be bumped to over 680 if the BD happens to develop. If not...the parts are available thru Mopar to take your '08 close to that level with bolt-ons. The 2010 will use the same basic motor...which I have personally seen at over 705 HP on an engine dyno. The big news in 2010 will be major body change...the power will be available if the HP wars are still on. A little info on this state of the art motor:
This motor is strong low and high- with the high extended several hundred rpm higher. As we saw firsthand on the dynos:
RPM HP TQ
2400 225 495
3700 410 550
4800 524 570
6000 613 535
There was a stable 10 degree (+/- 1 deg) delta between the incoming coolant temp and the outgoing coolant temp at the higher rpm loads.
Driveline loss: They measure a lot of things and the answer was between ~12% depending on what gear and what rpm
One of the dyno test runs is to run the motor at 100% power for 8 hours - with glowing red exhaust
Big valves with new angles: 52.8mm (2.078") intake and 40.5mm (1.59") exhaust
Exhaust cam can change up to 40 deg. This will smooth the idle a lot - to much reduce mis fires and meet EPA needs- but allows for more aggressive profile in mid and upper power bands. Variable exhaust on allows increase in upper power band while a variable intake would increase low end tq.
Massive flow rate increases as demonstrated by:
Gen 1 as a base
Gen 2 +17% over Gen 1
Gen 3 + 6% over Gen 2
Gen 4 +23% over a Gen 3
Knock Sensors and Octane: There are 2 knock sensors. they back off the timing if needed. the ecu is calibrated for 91 octane. The ecu will only back off timing - it will not just advance it until it detects a ping so 100 octane will not give any power increase
The piston/rod assembly is the unit from a 6.1 hemi. Floating pin now. Stronger and better than the Gen 3 unit. That is the reason for the 1mm bore increase
74mm Throttle Bodies!
A new oil filter that will also work on all Vipers. Less pressure drop and better filtration. Napa filter was the base but a relief valve was added specific for the Dodge brand unit.
All metric bolts now
They have tuned an 8.4 motor to put out 675hp/650tq with some bolt-on performance parts
There are two major changes which required a lot of work: CAM and PCM (they call it now Venom Control). Especially the new VC device required a lot of work. It is a brand new computer built from ground by DC and Motorola. Both the hardware and the software are new. The new engine management program is able to handle 1000 times more signals than the old PCM. The Venom control is the basement of a new generation high tech Vipers.
DC has spent and still spends millions of dollars to develop this new Viper engine. The new engine should be highly reliable. All mechanical improvements are coming from race proven technologies. I think there are 5 dynos running full time this new engine. Believe me the new engine is highly tested. But really the challenge is the new Venom Control device and not the mechanical improvements. Engineers explained that they have done everything before deciding to replace the Old PCM from the early 90's.
Unfortunately the VC is so sophisticated that it will be harder for tuners to alter its signals. According to engineers the last GEN 3 vipers from 2006 should gain in value since they are the last generation Vipers with the old PCM. However they insured us that they will do their best to make performance Venom controllers available through Mopar.
The entire oiling system was upgraded. One of the DC engineers said "it was turbo charged". The oiling system was improved because it is responsible to provided high pressure oil to the cam positionning system. This requires also a special oil filter. If the oiling system was also very good before now its reliability got to the level of an F-16 airplane. All the technology used for the oiling system comes from race proven applications.
There is a sensor at the cockpit side of the engin checking if the cam is at the desired position. If not it will stop the engin. The oiling system and espetially the oil pan was modified such a way that the engin will never miss any oil no matter what you do.
The head was redesigned such a way that it could fit on a GEN 3 Viper ! It flows 23% more air than the 06 head ! Look for new parts at the Mopar counter !!!!
The block is the same but cylinders were bored 1mm larger. So 2008 pistons will not fit on a 2006 Viper.