Exhaust HP Gains

[Jason@Nameless]

Thought we'd share some of our dyno numbers here as well as some details on what parts the dyno results were based on. These numbers are for a stock BRZ equipped with our Dual Exit Street Axleback Exhaust as well as our 2.5" High Flow Catted downpipe.

The Axleback exhaust looks like this:



It features full Mandrel Bent, T304 Stainless, TIG Welded construction and every unit is fixture-built by hand right here in our shop in La Center, Washington. Right now we are only selling the Ø5"x6.5"L Muffled version but we are sound testing a muffler delete version as well as a Ø4"x6.5"L muffled version. The mufflers are hand built here in our shop featuring medium density high temp ceramic wool (we put this directly between turbo manifolds and heat shields and it lasts forever even in those harsh environments), and they are a straight through design, with zero change in restriction or power from our testing on the WRX & STi as well as a number of other applications we have used these designs in. The primary circuit is 2.5" with a Stepped Y to 1.750" secondary circuits. The tips are 4" double wall and are the only part of the exhaust that is not made by hand in our shop, they are purchased off the shelf. We WILL be offering our own straight cut double wall tips similar to the sets that we offer on the 2011-2012 STi & WRX, but in a single tip per side configuration:



The downpipe is a 2.5"Ø T304 mandrel bent stainless design w/ a 200 cell single piece conical formed high flow catalytic converter for optimal flow dynamics. It looks like this:



We also have a midpipe and while we will be dyno testing it this week, we're not terribly confident that there is a lot of power on the table to be had by replacing the factory part. For all you SCCA Solo2 Nuts, we'll certainly offer it though. Every HP counts, right?

So here's the meat and potatoes of it all, the dyno results:

Horsepower results for the downpipe and axleback were pretty good, we felt. Across the powerband gains were: 7.51whp; 10.28whp; 10.83whp, 12.01whp, 19.00whp. Here are the details:



Torque gains, no magical Evil Valley of Torque Loss solution, but we did make a solid 8-13% torque gains across the powerband. Wheel foot pound gains were:
13.46ft lb; 12.84ft lb; 11.42ft lb; 14.11ft lb.



And finally, for those of you who want to see both torque and hp on one graph, here it is:



Feel free to ask away, dyno pulls were done 3 weeks apart on the same dyno with the same settings, climate data is as follows:

Baseline Pull: 66.19F, Humidity 60%
Modified Pull: 66.60F, Humidity 43%

The dyno is a DynoJet Lynx in 2WD mode with the FWD roller de-coupled and the software settings in RWD mode.

Feel free to ask for any more data or information, we're shipping these parts out on Monday for those of you who have already pre-ordered and we'll have enough to ship 2-3 more out of this build cycle and will build with our standard 5-7 day lead time for any orders placed when we have no shelf stock.

If you want to know more about us, check out this thread that my business partner John put together in another area: http://www.ft86club.com/forums/showthread.php?t=8486

And we do have a few header designs in the works...as well as an overpipe.

Thanks,

Jason Griffith
Engineering Director
Nameless Performance, Inc.
See what we do and how we do it on our Facebook Page.

[Razz]

10 to 12 WHP across the board with Hi Flow cat no bad.

Can you post the sound and then post another sound bite with it driving by?

[Jason@Nameless]

Originally Posted by Razz

10 to 12 WHP across the board with Hi Flow cat no bad.

Can you post the sound and then post another sound bite with it driving by?

Here's a good review with a number of sound clips:

[ame="http://www.youtube.com/watch?v=X_GhVCzVcdE"]Nameless Performance AxleBack Exhaust - YouTube[/ame]

Also remember that is the 5" muffled axleback w/ high flow catalytic 2.5" downpipe. We will be offering other axleback variations for a little louder sound level in the next week or so. Should be prototyping and testing them on another local FRS here in the next week or so. Also have 3 header designs in the works that we will be testing on Thursday. First design that is just wrapping up is a stepped 4-2-1 true equal length w/ High Flow Cat.

We also have a track axleback muffler delete that is simply a 2.5" single exit dump pipe for $99, saves 23lbs off the stock muffler weight. Perfect for track days or function over form daily driving.

Jason Griffith
Engineering Director
Nameless Performance, Inc.

[Dimman]

Torque/power crossover point on the overlaid graph of before/after doesn't look like it's at the same rpm for before and after pairs.

What am I looking at?

[Jason@Nameless]

Originally Posted by Dimman

Torque/power crossover point on the overlaid graph of before/after doesn't look like it's at the same rpm for before and after pairs.

You're looking at a dyno graph with the Forced Scaling shut off. If you'd like I can post yet another dyno graph with forced scaling on so that you can see that they both cross at the same point (ie scale on the torque graph on left fixed to the same scale as hp on the right).

Here is yet another graph for you. This is the last one I'm posting. If you think I'm fudging dyno data, don't buy my exhaust. Sad part is, I can make 20whp across the board just by telling the software that the dyno is in AWD mode and leaving the secondary set of rollers disconnected. And you would never be the wiser. Also, I can change the calibration data between pulls and do the same thing. Feasibly I could make whatever WHP I want to 'create' by doing this. Ask anyone who has bought our WRX or STi parts whether or not their gains were in the same range of our published dyno results and you'll see that we're an honest company who works hard to develop high quality, well designed and performing parts. It is in our best interest to operate with integrity.



Jason Griffith
Engineering Director
Nameless Performance, Inc.

[Symbiont]

Originally Posted by Jason@Nameless

You're looking at a dyno graph with the Forced Scaling shut off. If you'd like I can post yet another dyno graph with forced scaling on so that you can see that they both cross at the same point (ie scale on the torque graph on left fixed to the same scale as hp on the right).

Here is yet another graph for you. This is the last one I'm posting. If you think I'm fudging dyno data, don't buy my exhaust. Sad part is, I can make 20whp across the board just by telling the software that the dyno is in AWD mode and leaving the secondary set of rollers disconnected. And you would never be the wiser. Also, I can change the calibration data between pulls and do the same thing. Feasibly I could make whatever WHP I want to 'create' by doing this. Ask anyone who has bought our WRX or STi parts whether or not their gains were in the same range of our published dyno results and you'll see that we're an honest company who works hard to develop high quality, well designed and performing parts. It is in our best interest to operate with integrity.



Jason Griffith
Engineering Director
Nameless Performance, Inc.

I don't know about other people, but I have really appreciated all the information and transparency. I love seeing a work-in-progress come to life like this, and I love your 'in house' development and production mentality.

[Shagaliscious]

Originally Posted by Jason@Nameless

The Axleback exhaust looks like this:

Damn that looks very nice. Fills the cutout for the exhaust much better than the stock tips too.

[Dimman]

Originally Posted by Jason@Nameless

You're looking at a dyno graph with the Forced Scaling shut off. If you'd like I can post yet another dyno graph with forced scaling on so that you can see that they both cross at the same point (ie scale on the torque graph on left fixed to the same scale as hp on the right).

Here is yet another graph for you. This is the last one I'm posting. If you think I'm fudging dyno data, don't buy my exhaust. Sad part is, I can make 20whp across the board just by telling the software that the dyno is in AWD mode and leaving the secondary set of rollers disconnected. And you would never be the wiser. Also, I can change the calibration data between pulls and do the same thing. Feasibly I could make whatever WHP I want to 'create' by doing this. Ask anyone who has bought our WRX or STi parts whether or not their gains were in the same range of our published dyno results and you'll see that we're an honest company who works hard to develop high quality, well designed and performing parts. It is in our best interest to operate with integrity.



Jason Griffith
Engineering Director
Nameless Performance, Inc.

Don't take it personally, but as you know, that is one of the things to look for when evaluating posted dyno data. I was curious, I asked. It is something to be careful about in the future.

As you also know, dyno variability makes it a pain in the ass for customers to evaluate any data we see. If you go through some threads, you will note that I also question Perrin about their dyno operations. And in all honesty I am less satisfied with their response than yours, but am limited by a lack of knowledge about Dynapack hub dynos.

Again, I wouldn't take offence to questions about any data you post. But dotting your 'i's and crossing your 't's wouldn't hurt.

[celica73]

I'd really like to see that exhaust with a single muffler and single tip. It seems rather tortured to put the Y in there. It should be lighter and cheaper that way (and not suffer performance in the least).

Scott

[icemang17]

with a stock engine that produces 100hp/L it will be hard to get significant gains..... However I would say a free flow intake-air filter, proper headers and straight flow exhaust (no cats) should free up a few ponies.....I'd say a full race setup would be close to 200whp with tuning....assuming 170whp stock.... Remember 200whp is about 235 crank HP....117hp/L is impressive....given the relatively low RPM HP peak of 7000..... Pretty much all 100hp/L NA engines spin to at least 8K+

[Asterisked Accolade]

Originally Posted by Tainen

Hmm, that run was a mistake it looks like- 170whp, not 179. But the above is still true, we are seeing power levels go up after some time with the parts on the car.

Yeah I can feel a power difference over stock, but... I wonder how slowly the power adjusted up on me. There wasn't a noticeable moment where all the sudden pulls felt 7whp faster.

Beware the misleading "butt-dyno."

I think these gains that were showed were great, and the sound of the exhaust was as well. I wonder how this full exhaust, plus header, SRI, tune, and weight reduction would feel.

[Tainen]

Originally Posted by Asterisked Accolade

Beware the misleading "butt-dyno."

I think these gains that were showed were great, and the sound of the exhaust was as well. I wonder how this full exhaust, plus header, SRI, tune, and weight reduction would feel.

exactly. That's why I'm trying to specifically say hey, I didn't feel a specific huge improvement in butt-dyno feel. The ECU obviously adjusted over time, too.

I know they will have their header + SRI + exhaust setup dyno'd on thursday. no tune yet of course, but... it should be interesting to see more of the question marks filled in on this car.

then a car control clinic on friday.

[Asterisked Accolade]

Originally Posted by Tainen

exactly. That's why I'm trying to specifically say hey, I didn't feel a specific huge improvement in butt-dyno feel. The ECU obviously adjusted over time, too.

I know they will have their header + SRI + exhaust setup dyno'd on thursday. no tune yet of course, but... it should be interesting to see more of the question marks filled in on this car.

then a car control clinic on friday.

It would also be cool if they could sell these modifications in sets/kits: 15hp Kit, 25hp Kit, 32hp Kit, ect. Then in the details they could list what each set consists of, and the gains/price.

[Tainen]

Originally Posted by Asterisked Accolade

It would also be cool if they could sell these modifications in sets/kits: 15hp Kit, 25hp Kit, 32hp Kit, ect. Then in the details they could list what each set consists of, and the gains/price.

yeah not a bad idea. They love to do custom setups with lots of options... so maybe stepped stages that get more aggressive/less DD friendly.