Since we have two fine gentlemen here with experience using the 5psi Roe maybe you guys can help me. One of the frustrations I have is finding a dyno chart, log, etc. of how a 5psi Roe performs on a GenII Viper. A before/after Roe dyno would be magnificent. There doesn't appear to be that many posts on the subject. Even Roe's site doesn't have a dyno chart of a GenII with 5psi so it's difficult for me to understand how this setup would perform. My question is: Can you guys post your numbers, dyno, mods you did along with your Roe?
Currently, I have an '01 RT/10 with Belanger Headers/Catback, RT cats, T&D Rockers, tubes/filters and a Vec3. Prior to the rockers, I dyno'd at 480rwhp and 525rwtq but was still rich. The engine is strong and the guys at Paddock kept telling me the Viper kept making more peak power after each run. I haven't changed my tune yet but I figure with the rockers I'm at or just over 500rwhp.
I'm interested to know what I can reasonably expect in terms of HP/TQ on my setup with a 5psi Roe? Peak number is OK but I'd love to know what the power looks like under the peaks. I have to imagine there's monster torque at the lower-mid range RPMs.
Thx.
That is one strong engine Tony! Here is a dyno sheet on our 2001 Bumblebee. We bought this car as is. I was unable to log when we bought it as the original VECs didn't have that capability. I upgraded the VEC and added the WB set up. My initial logs showed these dyno numbers were achieved with mid to high 9 AFR. WAAY rich. I have it tuned much better now at mid 11s AFR. Not sure how much added power, but I know it is stronger. There is no dyno within 400-500 miles from here. It's my opinion that logging is the most effective way to get a real life tune. I think this dyno sheet does show the massive TQ available from 2600-4200 RPM...basically 570-586 TQ. Right across the graph.
The cars are somewhat similar:
2001: 5 pounder, Belanger headers, Corsa 3" track exhaust, Fidanza lightweight flywheel,tubes,filters
2000 car: 5 pounder, Belanger headers, Belanger 3" exhaust, Fidanza Lightweight flywheel, 1.7 HS roller rockers, 3.45 rear end, tubes, filters
The 00 car is definitely stronger. I had it dynoed in Detroit a long time ago...I think 2002. Just the exhaust was on then. It was 439HP/481TQ. I have no other dyno numbers since. All the SC tuning was done by log runs.
One possible way to measure would be by log run snapshots of different speeds and ETs. One measure I look at are 3rd gear logs: 2750 RPM to 5500 RPM. We could compare those for you to get a rough idea of the power adder of the Roe.
Hope this gives you an idea
Steve