@AR Headers what cats did you use?

 

When we tested we used GESI cats. They are 300 cell.

Nick.

 

So have you though about testing their headers and your cats?..... have you done testing of your cats and your exhaust ....when soul paired the 2 it lost power.
have you though about testing with soul or fabspeed?

 

We would love to see what the combination of ARH headers and Fabspeed Sport Cats puts down. We've only installed one set of customer-provided Kooks headers on a build - and the customer did not opt to dyno the car. It seems like ARH makes more power than Kooks.

GESi cats have a couple disadvantages against them - 300 cell won't flow as well as 200 cell, and the physical size of the GESi cats being used appears is rather small compared to the considerable 5.62" cross-section of our HJS cats. End cap design on both sides of the cats is also substantially different, having an impact on flow and how much of the surface area of the cat is actually used.

We have not tested our Sport Cats with any intake - so I can't make a comparison to Soul's testing of a Sport Cat + Intake combo.

 

i meant your exhaust not intake.... so numbers for your sport cats paired with your exhaust

 

Dyno data is available in the thumbnail images under the individual product pages on our site:




For the Valvetronic Maxflo it is HERE

• Baseline is with Sport Cats already installed
• Note that we show dyno testing with NPP closed AND open for transparency and no sandbagging

For the Sport Cats it is HERE​​​​​​

• Again, for transparency, we show that both OEM runs AND Sport Cat runs were done with valves OPEN.

Definitely more gains when the two are paired - and the difference in sound is night and day. Although the NPP flows rather well with valves open, the sound is not likely to give an enthusiast goosebumps.

 

OK cool so it made 4 hp more than stock with High flow cats.... what about dyno runs of the exhaust without the cats ... dont see those #'s anywhere

 

Not sure where a figure of 4hp came from. The dyno for the Sport Cats shows more than double that figure - Upwards of 9whp (8.78whp at 5,223rpm) when our Sport Cats were paired with OEM NPP in open position:







When the Valvetronic Maxflo is added to the Sport Cats, in the valve open position, additional gains of 6whp (5.69whp at 5,073rpm) can be had:








So with this data our Sport Cats + Valvetronic Maxflo (452.17whp) offers a gain of 13whp (12.79whp at ~ 6,000rpm) compared to OEM Cats + NPP in valve open position (439.38whp).

Your previous post indicated that Soul lost power with the combination of these two parts - this is showing that is not the case with Fabspeed parts. A lot of this is likely attributable to our true x-pipe design - taking advantage of the scavenging effect of both banks of cylinders - rather than their more simplistic cross-over exhaust design.

At first glance, I don't see a Valvetronic Maxflo dyno as a stand-alone graph in my shared drive, as most in-house cars installed the combo. I'll see if R&D has a dyno for the exhaust by itself from the prototyping side of development. Will advise!

 

If you want to be condescending and rude and point arrows i can as well ... so if you can READ the chart clearly shows the difference of 3.86 so i kindly rounded up for you to get 4



And then your next statement is also not true per your graphs 452.67- stock baseline of 442.29 is 10.38 NOT 13!!!




So maybe next time instead of being rude and condescending and on top of being WRONG you can just answer the question of do you have a dyno graph of your vavlvetronic system by itself and no cats.

 

Also I think i have learned a valuable lesson in this and that it to NOT do business with you.
You not only knock your competition and talk about them instead of talking only about what you do good and why you are good you also talk down to customers and are rude and condescending....... Not sure if you are the owner or just an employee but man this is a horrible look!!!!

 

I was not being rude at all. I apologize if you took offense to my reply. It is often difficult to glean tone in an electronic format.

Here's your statement:


That statement is simply not accurate. Here is the dyno for Sport Cats only:



If we focus solely on peak gains in the key, it's 448.81 - 442.29. That's a gain of 6.52whp.

If we focus on max gains (the biggest gap in the graph), it's 429.64 - 420.86. That's a gain of 8.78whp at 5,223rpm. (This is why I referenced "Upwards of 9whp (8.78whp at 5,223rpm) when our Sport Cats were paired with OEM NPP in open position" in my original post. This is the max gain.)

Both peak gain figures and max gain figures are greater than the 4hp you referenced from Sport Cats alone:
Most knowledgeable tuners will express the importance of the area under the curve. This is a much more accurate representation of overall power than the snapshot at any single rpm - and there are fairly consistent gains from 4,000rpm to redline.


The 3.86 peak gains you are referencing is not the Sport Cats versus OEM. Rather, it is the dyno of the Valvetronic Maxflo + Sport Cats - with a baseline of Sport Cats already installed. You can see the dyno key indicates the baseline (red) references "Fabspeed Sport Cats, Stock NPP Exhaust (open position)":








The baseline of 442.29 you're referencing is the peak number. I was referencing max gains in the curve - and the specific rev range where they occur - when I referenced "Sport Cats + Valvetronic Maxflo (452.17whp) offers a gain of 13whp (12.79whp at ~ 6,000rpm) compared to OEM Cats + NPP in valve open position (439.38whp)."

There was absolutely no rude or condescending intention. The data I provided was accurate. For the Sport Cats, the gains are higher than 4hp you stated - whether we are referencing max or peak gains. For the Valvetronic + Sport Cat combination, I was referencing max gains, and your were referencing peak - both are accurate - and, ultimately, a delta of 2.41hp.

The only reason I mentioned Soul by name was because you asked a specific question of the power gains of our Sport Cat + Valvetronic combination - and mentioned Soul lost power with their set-up:

The dyno shows Fabspeed did not lose power on this combination.

ARH is not a direct competitor as we do not manufacture headers for the C8. In fact, I've specifically mentioned I would love to see ARH paired with our Sport Cats and/or exhaust (as ARH appears to make more power than Kooks). Early on, I had some questions about the ARH dyno figures, which didn't appear to line up at first glance, and Nick answered them cordially. In a thread literally titled, "Headers or Cats," this sort of open dialogue about power gains of each option is totally acceptable. I even thanked Nick at ARH for his insight:

This is the second time you've been offended by something I've written:



I'm genuinely not sure what we've written to make you feel so triggered. My goal is to convey accurate information for all C8 enthusiasts to enjoy. I am not the owner, merely a lowly sales guy tasked with keeping up with forums - often off the clock because I'm a passionate enthusiast myself. My original reply holds true:


California certainly has hurdles for vehicle modification - and none of these parts are CARB certified. However, if you choose to move forward with any Fabspeed upgrades which have definitive impacts on your goal to improve sound (and gain some power as well), I'll be more than happy to assist you - 267-742-3014.

I'm still committed to get you the exhaust dyno by itself - our Tech/Tuner is wrapping up an R8 and he will get it to me when that's complete.

 

Im over it!!!!!

 

Send me a set and I'll test them out. I so happen to have a set of ARH Headers on the way as well.

 

PM'd

 

It would be nice to see some track numbers with this particular system. Maybe that would resolve some of the debates.

 

I like that idea - I suppose we'll have to wait for Spring, as many C8s are away for the Winter. Additional power helps, and the Sport Cats are 9 pounds lighter than OEM. The Supersport exhaust section is 38 pounds lighter than stock - and the Valvetronic is 20 pounds lighter. With almost all of that weight behind the rear axle, the impact on polar moment of inertia should be strong.

 

I just had Dynocomp in Scottsdale AZ install ARH headers, Fabspeed sport cats and Fabspeed valvetronic exhaust and my car picked up 30hp and almost 34ft. lbs. of torque at the wheels. I love it by the way, it’s very aggressive.

 

My dyno sheet:

 

have you done any 1/4mile passes or tracking yet?

 

Not yet.