EPL tuned B7 RS4 dyno - before/after

B6/7 S4/RS4
#1

Car had just been carbon cleaned (although he didn’t say if it was cleaned in between tune/no-tune…I have a feeling it was before both dynos because his ‘STOCK’ profile looks steep enough)

Modlist = GMG catback, Port/Polished Intake Manifold, K&N Fitler (all were present pre and post)
9.9 WTQ peak gain
16.1 whp peak gain
Gains are pretty modest, although it’s just a tune with stock downpipes.

How about the area under the curve? From the looks of it, delta is pretty slim from 5500 up and most of the real ‘difference’ is down low. I’d be willing to bet a Coke that the car was dyno’d in 3rd gear, and that it was pretty cool out. This would mean the PRE dyno is limited by the factory torque limiter in 1-2-3 gears.

You can see that the delta below 5500 is big, but above it is very modest. If you’ll recall the RS MANIAC dyno from a while back, it showed a modest peak WTQ gain, but a fairly awesome 40 wtq largest delta (just like this instance). Of course when you dig into that result, you find that the big early delta was for the same reason as this one (if I’m right)…the factory torque/throttle limiter on the stock tune ‘sandbagged’ the before, making the ‘after’ delta look great in the lower to mid RPMs. Not that AMD did that on purpose…just a consequence of a 3rd gear dyno unfortunately, and some people don’t like to dyno in 4th gear because of the high speeds. Sure doesn’t hurt the apparent area under the curve gain though lol.

Anyway…DISCUSS!

http://i1207.photobucket.com/albums/bb469/lulz101/GaryW_Final.jpg

Here’s an example of a 3rd gear log of my bone stock RS4. As you can see, even though I was pedal to the metal for all of 3rd gear, the stock tune limits throttle valve angle DRAMATICALLY below about 5500 RPM. 52.5% in fact up until our first 99.6% reading at 5640 RPMs

http://audirevolution.net/addons/albums/images/729968961.jpg

http://audirevolution.net/addons/albums/images/729968961.jpg

And here’s a dyno plot I made using the VagCom torque field on that 3rd gear log above.

(just for fun of course as I don’t think that’s very useful, and uses a weird ‘engine torque’ metric that has NO relevance vs. wheel or hub dynos)…but again, you can see that profile where the car is very restricted below 5500 RPM, before it finally wakes up.

http://audirevolution.net/addons/albums/images/744079309.jpg

http://audirevolution.net/addons/albums/images/744079309.jpg

#2

That is a massive dip in the tq, is noticeable on the road?

Well at least the tune has cleaned up the area under the curve, and made it a little bit more powerful. Is there any more information on what they did with the tune. It would be nice to see what the graph would look like in another gear.

#3

it’s not a massive dip at all…it’s the stock tune restricting torque…which gradually falls off as you move up the RPM scale to about 5500 rpm…and then the restriction is lifted, throttle hits 100% and torque/power has a surge as a result.

It’s funny because people love the ‘5500 rpm kick’…but they really shouldn’t. Wouldn’t it be more fun to just have a full RPM curve all the way across? lol.

#4

What is Audi trying to save with limiting the torque, I would prefer the have a surge in tq rather.

By the looks of it, it is not just another NA tune form another company who adjusts the throttle map and be done with it. I wonder if they will take it to the strip in the spring AMD do great work but tend to like their dyno graphs. I wonder how close this tune is to JHM’s

#5

Saki, your 3rd gear log is strong for a stock RS4 based on what I’ve seen. Over 400NM’s is nothing to sneeze at and your breathing pretty good as well with 150+ G’s/Sec. Your peak of 154 g’s/sec ROUGHLY translates to 385±CHP. 3k - 8K is about 8 sec’s flat, again pretty strong for stock.

As for EPL’s tune, I think you are on target from the little we know about what changes they make. The tq limiter removal in itself is probably the reason for the bump down low. I don’t know anything about their calibration changes so I’d suspect a little fueling/map changes with maybe some timing and tq removal is the reason for the increases above.

#6

I think its a refinement thing, at least in part. Makes the day to day driving smoother for regular folk who dont deal well with snappy power.

#7

Here is why this just isn’t impressibe.

The colder it gets the more a stock RS4 will pull power. Not only are the numbers low there about the same if you look at Epl’s last dyno joke… where JHM cars are seeing 20whp and 20wtq in 100deg heat this isn’t impressibe for epl in these winter temps.

The issue is the gain. last time EPL did dyno work they dynoed the car in 3rd gear for the limmiter and then dynoed the car again in 4th gear… 4th gear has no limmiter… You dont’ even need to tune the car to get these kinds of gains from the car… You can do this on a stock car. let alone the fact it was ported and carbon cleaned… if you ask me the car probably lost power with the EPL tune.

more on why I think that… if the car has a intakemanifold the stock tune would have been not been using much if any of its benifits… A REAL tune should have been able to make a large gain with these mods and that just obviously didn’t happen…

Its nice to see there are other cfompanys making tunes but its clear there is only one real tune for the RS4…and its JHM’s

#8

yeah, I’d much rather see one of these EPL cars go to the dragstrip and make some timed passes for us, but it seems like a lot of the RS4 guys have this VICIOUS snobby attitude about the dragstrip. I just about wanted to vomit on some of the guys on rs246 for the snobby dick attitude they had about the dragstrip, almost like it was beneath the RS4.

I’ve said this before, and I’ll say it again…

If a tuner says ‘this car wasn’t made for the dragstrip’ they are usually selling go fast parts that don’t work.
If a forum member says ‘this car wasn’t made for the dragstrip’ they have usually just purchased go fast parts that don’t work.

This car was made to storm the autobahn, be hot from a light and to go around corners at a trackday if you ask it to…but it wasn’t MADE to do any ONE of those things. Running it at the dragstrip doesn’t mean you’re attempting to define the car’s sole purpose. It just means you want to have some fun and test the car. A perfervid disdain for the dragstrip is usually a big red flag.

#9

I think its getting more and more fail for EPL and companys like this. These results were likely Pre and post carbon EPL made larger claims and this car has more mods with lower results.

Saki post this for all the guys who wish to live on the dyno. A poster on AZ was trying to push great results from a dyno… only to find out that the dyno was done months ago in the summer Stock on a different car and the company has a history of dyno fixing.

[quote=justincredible VIA AZ post]well guys as always great members on AZ and its best that companys looking to try and pull the wool over anyone eyes don’t do it in the B6/B7 S4 section. Turns out all we spoke about is correct.

[QUOTE='01-S8;7072872]Never said that OE Tuning is the best or anywhere near the best at doing Audi tunes…

again im simply showing you a dyno graph… personally i like to view graphs and look at gains and see what other people do to make power…

i just thought i was posting something about an Audi in an Audi forum… [eek]
[/quote]
Its obvious that OE is hoping there are more people like you that just like looking at graphs and don’t want to do actual home work… its not the first time a company looked to make a dyno sheet look good to sell a failed product.
[/quote]

#10

hahahah I just now realized this was the EPL TUNED RS4 dyno. . . I thought it was a before/after from EPL doing a carbon clean.

#11

carbon clean would likely yield double the gains if not more.