That's one of many who have shown that level of gain (30 hp and 33 lb/ft of torque to the wheels max gain, with large portions down to the bottom of the RPM range) with our exhaust system. We claim less than that because our dyno is very conservative. We'd rather claim low and have our customers come back with higher... not to mention the races won. One M5 customer even dyno'd 20 hp from just section 3:
The dyno computer or the ECU in the car?hi guys new member . my new rpi exhaust just got delivered this week . i will do dyno test before and after and advise . but for a few weeks going onvac to daytona bike week with my other toy . but i have a question , tried to dyno the other day but didnt know how to set computer to allow test , can anyone help ?
I agree with Hasan, and this is based on my own personal experience when I had my M5.
"Any gains from an exhaust are not big enough to be felt while driving, unless one is changing the headers as well."
Absolutely true! You wont feel very much power gain changing your exhaust.
You will feel increase in power once you install an after market headers as well and also update your ECU software.
When I had my M5, I installed Tubi Rumore plus exhaust.
I gained about 6hp, not enough to really feel by my butt o meter.
When I installed SuperSprint headers, I gained 35horses (confirmed by Dyno).
Then I updated my software with PowerChip.
Powerchip tuned my software per my bolt on mods: Tubi exhaust, super sprint headers, Dinan Cold Air intake, etc.
After software tune the beast really came alive, no need to dyno after that as the smile it puts on my face whenever I drove my M5 was enough.
It really transformed the beast.
"When I look for an exhaust, I only look for the best sound."
Me too, and for me, that was Tubi Rumore. But then again, we are all different so listen to a lot of sample videos and decide for yourself what sounds good to you.
Good luck! Lots of choices out there. Just depends on how deep your pockets are : )
:Thumbdown: You need a camera if you have these type of encountersWell, same old story.
Sure thing. There are exhausts that rooaaaar ( fine with me ) and exhausts that roooaaaar and deliver power ( RPI ).
I would not call 25-30 whp exactly negligible. Nor 50-55 whp with headers. Add Ess stage 2 tune, Schrick cams, ram air, pulley and you
come up with 615 bhp at the crank verified on a Maha Dyno.
Real world ??? Normal 507 hp against an F430 Scuderia ( 535 hp with Capristo exhaust ). 50-180 miles , lost by more than 8 car lengths.
After the mods ??? Same scuderia, same road 50-180 ??? "Gone in 60 seconds". He lost by more than 10 car lengths.
Thumbs down !!!:Thumbdown: You need a camera if you have these type of encounters
Mark,George, perhaps he only was "thumbs down" that you did not get a killer video of the winning encounter. At least I hope so...