Some updated dyno results from John Henessey over at the viperalley:
2008 Viper: 598 rw hp Uncorrected in 61 deg. Air - Viper Alley - Dodge Viper Forum
Here's a cut and paste:
"The new 2008 Gen 4 motor continues to amaze us. Here are the details:
1. We put 150 miles on the car this weekend. So its a bit more broken in.
2. No addition mods have been made since we dyno'd 575 rw hp last week. That number was gotten with a bit of heat soak.
3. Today we dyno'd the car first thing in the morning. The ambient air temp at the time was 61 deg. F. Humidity was 32%
4. Made 3 pulls, first pull was 598/562, 2nd pull was 592/562 and the 3rd pull was 588/554. All runs were made back to back with no cool down and these numbers are uncorrected.
5. The 598/562 number SAE corrects to 585 rw hp and 550 rw tq.
6. Next thing we will test on the 2008 is a set of stainless steel long tube headers. My guys should have these fabricated and on the car later in the week.
7. I think the 2008 Viper is going to make over 600 rw hp with headers, exhaust and high flow cats.
8. yes we do have a video of the car on the dyno and will upload it as soon as we can. The car really sounds nice."
Discuss amongst yourselves.
I think it's interesting that John believes that the car couldmake 600 rwhp with headers, exhaust and high flow cats. Using a 12% correction factor I think this works out to 681 flywheel hp. This is close to the 675 hp figure quoted by Chrsyler for the Mopar header, exhaust and intake package quoted on the Viper Concept Coupe first shown at Detroit last January.
/Rich
