Alright gang, here it is. All the data you could ever want on a muffler. If you look on the dates of the dynos you will see it really took a month to put all the test together. I am honored the group would pick me to run these test. Hopefully this is up to everyones expectations.
Muffler Test

 

Da whistles go woo woo!

Great stuff, going to go and read this, I've been eagerly awaiting it

 

Stephen,
Exquisite! You have truly outdone yourself! I can definitely see what you mean in terms of how various factors can influence a buyer's decision and how one "size" does not fit all. Sound, build quality, hp, tq, ease of installation, resonance and cost all influence a purchaser's decision. Your individual comments below each dyno sheet are great. I am in full agreement as to the methodology used in the tests yet can also understand Chad's previous comments that each system will shine in its own right when properly tuned to the car's specific setup. That said, I feel this test was conducted in a manner that will prove to be the most useful to the most amount of people. Kudos to you Stephen. This is truly a gift to all of us!
With sincerest thanks,
Ken

 

Great stuff Stephen! Having installed my own exhaust on my car, I can imagine the amount of work that you have done. Outstanding!

However, I am disappointed with the Ruf data, not your fault and I am not shooting the messenger! I am trying to understand the numbers.

My car is an MY02 X50, has the EVO Stage 4 ECU, Bailey DV's, K&N air cleaner, and the Ruf Exhaust. Din hp/tq were recorded at 498.95 and 536 respectively. Todd/EVO verified these numbers in AZ before I took my car back to CA.

The car did have 104 octane fuel, and the air temp was 96.55. 28.50 in hg, cf= 1.08.

Any comments would be appreciated

Thanks



John

 

Thanks Stephen....great report!!!!

 

We couldn't either. That is why the foot note. We feel that there may have been a problem with that specific muffler. Ruf is looking into it.

 

WoW! I'm gonna take time to study your work, but what an impressive effort! Thanks in advance (of my reading it)...

 

Stephen,

Thanks. The foot notes are very informative. If you want the data from my run let me know. Super job!!!

John

 

Awesome job PHD!!!!!!

I also agree that the Ruf Muffler must have had a problem. It was a massive improvement over stock on my car but numbers do not lie. Ruf will have to pay you to test another one.

Thanks again.

 

thanks stephen,
very helpful!!!
you are a true gentleman to share with us.

 

Great Work!

 

Thanks Stephen for the great work!
Cant wait till my Level 4GIAC

 

Stephen,
Many thanks for all of your work on this project, it is well appreciated.

Regards,

DAB.

 

Stephen...

Thanks a bunch for the great work and write up! Looking forward to reading it in detail...

 

Great job Stephen!!
Now I can finally buy an exhaust...