REVO vs. APR Dyno Testing

B8 S4
#1

Yesterday was a little confusing, at least for me. However, I think I’ve got some tangible evidence. I walked out of the shop and forgot the dyno print outs but, to be honest, they were somewhat ambiguous. The first run ,with APR and meth injection off, showed a max of 328HP, at third gear and then again at the fourth gear pull with the max 6200 rpm. The second pull, meth injection on, showed the same peak HP but revealed that between 3600 RPM and about 4300 RPM the meth increased HP by about 20 horses. The dyno bay had a small weather station in it. We started at about 11AM. The temp was 84.6F, barometer 30.06, and humidity of 42%. The car was then allowed to cool for a couple of hours and the REVO ECU and DSG tunes were installed. Now it get confusing. Since the car can now spin to 7000 RPM in fourth gear it reaches 125 mph on the dyno, fourth gear, at about 6500 RPM and the dyno shuts down at that speed. The best we saw at 6500 RPM was only about 5-10 more HP. However, when we did a third gear pull, meth on, we saw 351 HP at 7000 RPM compared to the APR pull, meth on, of 328HP. This all occurred at about 2 PM, temp had increased to 87.3F, Baro had dropped to 29.97 and humidity was down to 40%.
Not the best of testing but I did my best…it was an expensive dyno day. Of course once the APR flash was gone we could not go back. The tech told me it would take about 20-30 miles for the ECU to adapt. The ride home was about 60 miles. Car feels strong but on way home saw 89F on the car thermometer so any subjective judging is meaningless. The good news is I can now spin to 7000 RPM like the big boys…finally. When in manual one must change gears manually. Down in auto remains normal and up shifting, again in auto, occurs at 7000 rpm.
I did my best, the quarter mile will be the best testing grounds. It appears it will be about 3 weeks before I can do just that. Below is a list of engine options currently on car. I hope this help!?!?

Roc Euro intake
APR CPS
Euro Code headers
Miltek resonated exhaust
Aquamist HSF 4 meth injection running pure meth.

#2

any reason you guys didn’t dyno in 3rd gear? (with REVO)

Post the plots, whatever they are. Good to see you can rev it out now. Should change things dramatically.

REVO tends to shut down in the heat so keep that in mind. Some of the guys who did extensive testing of REVO showed that it did very well in cool, dense conditions, and then it lay down when it was very hot.

Logging your parameters (ignition timing etc) will be interesting to compare to some of your old APR logs.

Maybe since you like buying stuff, go buy one of those pbox devices to do some performance testing. Either myself or Tsivas or someone with the software can ‘third part analyse’ it for you so that nobody claims you’re faking results.

#3

We did, Revo, 351 HP, APR 328HP. Will do some logging this week end and send you the info.

#4

FWIW I saw 356 HP on an uncorrected mustang dyno. Mods very similar:

APR carbonio intake
APR CPS
JHM light flywheel (6MT)
Milltek non-resonated
93 octane program run (Cal 91 with some leftover VP racing 101 pump mixed in)

http://i58.tinypic.com/2jax5wz.jpg

http://i58.tinypic.com/jtt6vo.png

#5

You should also include your lightweight rear rotors and BBK in the power mod list. Not sure how light your BBS wheels are but maybe those too.

#6

Sure, but skywagon has those too. I think what we’re seeing is remarkable consistency from Revo.

#7

Come on. I am assuming you are joking… We’re talking about two completely different types of dynos, on different ends of the country and two completely different cars. (Dyno Dynamics and Mustang are about as different as it gets). I’m sure it’s been said before, but don’t put any stock in dyno numbers unless it is the same dyno, same conditions, same car, etc.

#8

I’m not joking at all. We have two cars with the same mods and the same tune putting down the same numbers on both tunes, on both dynos. The day I did my car it was a dyno day, and APR tunes were putting down 325-330.

The key difference is that Revo has repeatability - the tune takes to the car every time. Not the case with APR where many people have reported (and I’ve seen) a flash go on the car and nothing significant changes.

#9

I doubt anyone here cares how your dyno compares to skywagon.

I was just pointing out that those mods should be mentioned when discussing your cars performance since they help acceleration. Not trying to be a wrist slapper, just mentioning it.

#10

OK. I’ll disagree in that the results from your dyno and Skywagon’s cannot be compared in anyway to determine if they are repeatable with so many different variables, but I’ll just leave it at that (not worth trying to convince you otherwise if you don’t already understand that). There are enough examples of every tune that show they can be all over the place depending on way too many factors.

It’s crazy to even talk about tunes not taking to the car as that’s not really possible. A car may not perform up to an expected level for a lot of reasons, but if one was to do logging and really understand how things work, that is pretty easy to figure out. Unfortunately, most people that have issues don’t want to do this, and they start saying stupid things like the tune didn’t take to the car when in reality there is a good reason it’s not performing as expected. I guess your Revo 100 tune didn’t take to your car the first go round?

#11

You really need that SPS Program switch and test it out on the 100oct tune, which is more like a 104oct tune. That with Meth mix correctly, you should be putting down around 400awhp.

Fwiw, which as others said, doesn’t mean much cause diff dyno, day, oh and I think pigs were flying that day too… I was putting down 430awhp albeit at 7250rpm. Using 110oct with 1/4 93oct. (Mustang dyno) The power just keeps climbing steep on these engines, if no knock is reported :smiley: which is why it’s important to Rev out as much as you can when running the 1/4 mile. Is also the reason you weren’t impressed in the past with times or dyno…You were shutting down at a mere 6.5k rpm.

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#12

Folks, the answer lies on a cool winter night winter night at the end of a 1/4 mile. Perhaps the best way I can describe the car is how it felt immediately after I put in the APR tune compared to stock…remarkable!

#13

http://img.gawkerassets.com/img/19447f8luzgbrgif/ku-medium.gif

#14

Huh??

#15

We have no common language to describe power upgrades. At a minimum, we can say Revo makes 10% more power than APR when the car is parked on a dyno. YMMV. Also, many APR software deploys fail. No reported cases of a REVO car not deploying software properly.

On the day I ran my REVO tune, I did dozens of launches without a CPS to learn how to do a 1/4 mile. I made as much horsepower as an M3, which is about 420 HP. The “race” gas I got from that Sunoco in a Sacramento backwater was suspect and was atypical from what I get at the real track.

I know that tuners run 10.9 all day on 119 octane maps. I’m not a tuner.

#16

Why? It’s a dyno.

#17

Because it’s less inertia to spin, i.e. less driveline power loss, unless he’s using a hub dyno. Not to compare dynos with skywagon, but when explaining his mods setup related to performance benchmarks.

#18

The difference between stock and immediately after I did the APR tune was eye opening. That difference is how it feels now. I jumped on it yesterday and before I could even think about it the car had shifted to second gear.

#19

It still takes power to spin the mass, the greater the weight the more power to spin. My front wheels and tires weigh 52 lbs, rear 54 lbs. I don’t recall the weight of my stock 19s. Drob is correct. Also, I know the Brembo rotors are much lighter than stock. Every little bit helps.

#20

not sure about that. You’ll need someone to explain it to you who is smarter than me, but that’s not accurate. LW parts don’t show up on a dyno. They definitely help acceleration though.

In fact, I think LW parts hurt you on a dyno.