What a difference a Tune makes... (RS4 content)

B6/7 S4/RS4
#1

So after going through AZ, I saw a post on a new vid released for the APR Stage III kit for the RS4. Looking at the numbers, I was suprised how well it turned out.

However, after reading the setups I was reminded once again how important the right tune is, and how sad it can be for those who don’t bother doing research.

http://youtu.be/HpHMnb4JnCE

The details:

Baseline Dyno Information:
Filled w/Oregon 92 Octane Fuel
APR Stage 1 Tuning 91 Octane Mapping
Full Milltek Exhaust
31K Miles, Never had a carbon clean on intake valves
Power produced at wheels 306 WHP 260 ft.lbs of wheel torque

Supercharged Dyno Information:
Filled w/Oregon 92 Octane Fuel
APR Stage 3 Supercharger Kit W/91 Octane Tuning
Full Milltek Exhaust
31K Miles, Intake Valves cleaned of carbon build-up during supercharger installation
Power produced at wheels 450 WHP 395 ft.lbs of wheel torque
Dyno correction is set at zero, smoothing at 5, ambient temperature high 60’s/low 70s (Fahrenheit)
Power measured at all four wheels on a Dynojet 248X - Not owned or operated by Futrell Autowerks or APR.

Just for fun I’ll throw in one of Beemer’s dyno day lists for comparison…( Hope you don’t mind)

http://img714.imageshack.us/img714/1566/dynodays.jpg

(Incase you can’t read it, here’s a link) http://img714.imageshack.us/img714/1566/dynodays.jpg

As great as everything is, and considering carbon buildiup… This RS4 was making less than stock with a tune and a full exhaust, or a nicely modded S4… That poor bastard didn’t know what hit him.

#2

I want to see a matchup of a JHM RS4 car vs the APR supercharged car. It will remind me of the days when NGNG kept saying how amazingly fast his VF car was until Jay showed him what they could do all motor.

#3

A delta of roughly 145WHP and 135WTQ when comparing; carbon gunked up valves in conjunction with APR tune and Miltek full exhaust vs. APR stage 3 S/C with (JHM tune?) + full miltek exhaust + carbon clean? Did I read that correctly?

If this guy went with JHM 2.75" exhaust, L/W flywheel, LW wheels, LW rotors and changed some other maintenace items (plugs, fuel filter, air filter etc) there should be some nice additional gains to be found…

Thanks for sharing the info too!

#4

Even better content when you look to see how bad the APR supercharger cars did before the JHM tune help. The power was already shown as low 400’s and they couldn’t even break into the 12’s in the 1/4 mile

There were lots of videos of the first APR tuned Supercharger cars running low 13’s… now that they have the JHM tune the cars are running much faster and funny I can’t find one of the old videos. seems they have been removed

#5

me too. Dan is working on it. I thought he was nuts when he referred to the potential 2.0 version of JHM all motor vs XYZ supercharged. Turns out with him running 12.30 FULL WEIGHT and APR running 11.8-11.9 the cars aren’t really all that far apart as it is!

Dan had JHM tune, JHM full exhaust, LW wheels, JHM Clutch/FW, intake spacers, JHM LW rotors, JHM LW CP.
APR had a $20,000 supercharger kit , race clutch, no back seat, no trunk floor (no nothing behind the B pillar).

Looks about right. Basically the TVS1320 with the JHM derived tune that APR is using on the RS4 appears to be good for about a 100-120 whp gain over stock. Arin claiming 150whp was a bit silly…he omitted the fact that a carbon cleaning is good for 20-40 whp in general.

Still, that’s a very legit 100whp. No PES or VF bullshit. The car performs now that the tune is right. With that being said, they’re nowhere near pushing the internals of the engine because they’re using such a small blower. The 1320 is a great addition but leaves some capacity on the table. They’re also out in left field pricing the thing at $18,995…and even at $15,000 it’s not a very good option (small blower, big bill!)

Hopefully the other offerings put pressure on APR to drop that. Their R&D costs were huge though…the re-design of the manifold etc just blew the budget.

just goes to show you how important tuning is. JHM’s tuner changed dozens of things with the RS4 APR SC tune when he tried to see if it would help (AT APR’S REQUEST). It sure did help. It saved APR’s reputation in the 4.2 world. Of course they just as quickly destroyed that reputation by first announcing JHM’s involvement…then denying it…then admitting to it but downplaying it (Arin said he JHM changed 1 thing lol).

Keith was pretty cool about it. Arin was a fucking retard. If they fire Arin or have him publicly apologize, I will delete the emails I have saved from Keith on this subject. Until then though, I’ll hold on to them… 8)

#6

Ive gone back and read some of that. Its a shame that arin even posts on the net. He comes off anoying more then anything. Seems giving the proper aprechation isn’t company pollicy for arin.

As for the APR blower. I have to say its kinda dissipointing. all that money and no where to go. The blower is maxed out less maybe 1 or 2 more lbs of boost. At what cost though. Still its good there not just thorwing caution to the wind and putting the largest thing on they could find only to destroy the motor. Seems while the APR kit is at the max limmits of the kit. It seems to be fast and still safe… well safe for now

#7

It was the best Eaton roots blower they could get at the time. It should be said…running 11 seconds (albeit very high 11s) is pretty special. That’s R8 5.2 type performance. I think the kit is a really nice bump vs. stock, and if it were $7500 or something, it would get a TON of traction. Unfortunately they priced it like a B5 built motor GT build ($20,000)…but delivered 1/3 the horsepower bump those B5 GT built motor builds get. It just really doesn’t work overall at $15-20,000.

The only thing saving APR from complete embarassment is how SHIT the other speed performance modifications for the RS4 were before 2011. You had http://audirevolution.net/forum/index.php?topic=56.0, APR, REVO and GIAC tunes which basically turn off the low gear torque limiter, remove the speed limiter, add some timing (that gets clawed back)…and makes you not much faster than stock. It was a wasteland, much like the B6/7 world was before 2008.

Best example? Has ANYONE in North America run their RS4 faster than my B7 S4 (12.9 @ 107.8) at the strip? The only limitation being they can’t have any JHM parts on their car. I don’t think there are any. That’s pathetic. All these guys running around with REVO and APR and GIAC and EPL tunes…and none of them have run faster than a stock RS4 or even my barely modded B7 S4. In 5 years???