Zippy, the horsepower and torque curves above don't match.

 

Chad's right on here. I have heard quiet a few reputable people, who sell Fabspeed and not EP or Cargraphic and not EP say that despite Stephen's test, EP made the most power on cars they had tested. Now as Stephen himself admits, different situations/conditions, may warrant different results. Either choice would probably be fine. That said, depending on your current hp on your car, will you notice a difference if you have a 415,450 or 500hp car. Probably not, the hp difference on lower hp cars is not enough to tell a difference. Will Chad tell the difference with his huge hp, probably. As hp/torque increase, the needs for increased flow, decreased backpressure are magnified and those small gains on lightly modified cars transform into larger gains with higher hp cars.

-lou

 

BTW, just looked over stephen's exhaust test. Here are the numbers to 5000rpm's, although, I know you already have them.


Fabspeed Loud (hp and torque at given rpm)
2500--128hp/252lb ft
3000--190hp/332lb/ft
3500--271hp/407lb/ft
4000--384hp/504lb/ft
4500--447hp/521lb/ft
5000--461hp/484lb/ft

EP Stage 2 loud
2500--145hp/305lb/ft
3000--213hp/372lb/ft
3500--305hp/458lb/ft
4000--409hp/437lb/ft??(europipe said they never saw this kind of drop on their tests)
4500--429hp/500lb/ft
5000--455hp/478lb/ft

 

Fabspeed the only way to go!!!!!!
Beautiful construction and GREAT sound!!!!!
Not to mention great power!!!!


Colin Miller
www.pes-tuning.com
877-697-1688

 

I mentioned this drop off in a post when stephans test first came out. I asked anyone that had owned the EP exhaust and had noticed a 500 rpm off. No one responded. An extreme drop off of that amount would be very noticeable. You would definatly feel this. Not to discount the test but there is something weird about that EP graph. I have asked a few EP owners if they have noticed any 500rpm drop off and not one had noticed this.

Also the graph of the Ruf exhaust was strange also, when I had dynoed the Rufs with my other mods, it showed a much different graph than stephans. There is so many variables when dynoing, that can be schewed.

 

When I had the EP installed on my car, I noticed no drop off in power. Th epower delivery seemed linear and pulled stronger and stronger as rpm's went up all the way to redline.

-Lou

 

Lou, that's the consensus from everyone I had spoken to about this drop off in power on Stephan graph. Not one person has felt or noticed this, someone had done a done a dyno with the EP and looked much ddifferent. I can't remember who that was.

 

Well, for one, EP posts their dyno results on their website. As a matter of fact, the guy who I sold my EP stage 2 loud to, had spoken to Stef at EP who said that on X50 cars they had tested hp gains at more like 30hp instead of the 20 they list for the non-x50 cars. The 30hp was conservative to, Stef said the lowest gain he measured was 30hp on the X50.

BTW, do you or anyone have any idea why the EP stage 2 loud sounds so much different/better, deeper, louder on his X50 car than it did on mine? Its like its two different exhausts.

-Lou

 

Well gang someone should have dropped me a call. Steff and I had already talked about this and confirmed that one of the wrong copies was posted, then sent and reposted. The corrected numbers for that range were 537 not 437 and the chart that is going to be published looks like this. Apparently the updated copy has not been uploaded. There were several drafts that were being cleaned up and doubled check against my notes. My office accidentally sent the wrong one. I should have noticed this in the original PP, but after 30 days of test, the heat and trying to work at the same time I glanced at it and said, UH Huh send it. So the graph below is the corrected version. I will also post another chart with the Fabspeed sport and the Europipe.

 

Thanks stephen for explanation. Do you know why the same EP stage 2 loud would sound much different on my car than an x50 turbo?

-Lou

 

Fabspeed Sport and Europipe.

Thanks to the lovely Mrs. PhD for the chart

 

Mufflers do mature and sound different with time. Also the X50 moves more air than the standard TT. All of these things will change the sound. My Europipe sounded much different then it started out.

 

Thanks. Must be the added airflow. I'm tellin you, as crazy as this sounds, my exhaust had like 500 miles on it and I saw them install it on his car and it sounded much different. Louder, meaner, throatier(is that a word). If it sounded like that on my car, I would have never gotten rid of it. Thanks again

-lou

 

Thanks to the lovely Mrs. PhD for the chart! And also thanks to the lovely Mr. PhD for posting the correct chart. I have been mulling over the wrong data in my head since your research piece on the various exhausts was posted. It's amazing how having accurate data can make a decision that much more clear.

Mike

 

Zippy,

At the time I tested the Fabspeed on my car, the car was producing approx. 526 rwhp. A little more than a Stage IV and a little less then the Stage IV GT.