I appreciate your sentiments but JHM makes nothing for the RS5. Will call fast intentions today. Am I correct in assuming you think there is no value in Capristo or Miltek regarding HP gains? Thanks
^^ Don’t worry about HP gains - focus on 1/4 mile gains. In that regard, I believe the consensus is that, while the Milltek sounds great on the 4.2 V8, it yields zero acceleration performance. Can’t speak to Capristo.
I requested info from SKN in Europe and they say over 50 HP gain. However, Part of the there mod is an intake “Airbox, Sport Airfilter, Hose”. Since the RS5 has 2 airboxes and intakes it concerns me they responded in the singular. Lost in translation? They use a Miltek exhaust and one has to ship the ECU to them.
exactly. Zero hp gains. In fact, we’ve seen those products produce performance LOSSES on some platforms.
They (milltek, capristo, tubi, scorpion, klappenlangeschlange, GMG, MTM) sell poorly designed, high priced exhausts that some people think sound good. Reality is Audi designed the car’s sound, and most of the exhausts just make it louder, but credit should go to Audi for the sound. So leaving that aside, how about performance? None of those offerings have followed the age old performance recipe for a naturally aspirated crossplane V8 engine. None. Weird eh? They use poorly chosen piping diameters, jagged speed robbing bends, no crossover to promote exhaust scavenging, poorly sized mufflers…the list is amazingly long. NONE of them got it right EVER on ANY of these Audis.
JHM guys used to race Mustangs, and when they saw these Audis with V8 engines and all of the terrible products available saw an opportunity to step in and do what has been shown to work for decades on NA V8. No shock they produced the best gains and fantastic sound was a nice bonus.
Skywagon…start listening to people trying to help you like we did before. Call Fast Intentions and see if you can work something out. If not do somehing locally instead of wasting your money on garbage from Europe. Anyone who is trying to sell you an intake is a fool.
Just sent them an e-mail and will call when they open. Looked at their website at the pictures of the S5 exhaust. No resonators on their down pipes, no center resonator/muffler. Nice and light but too loud? Also, my car has the selectable “Sport” exhaust compounding my situation further? Starting to think the stock Sport may be what I’m going with which maybe simply the best option? I appreciate your patience and I am absorbing yours and everyone’s knowledge. Might drop by National Speed too. Also going on a lift at the dealer today for a few minutes. Never seen the underside of my car yet. Thanks
Yes, skywagon, the performance recipe for a naturally aspirated high revving RS4/5 is nothing like the recipe for a turbo or supercharged Audi
B8 S4
- tune - stop boost bleedoff and you make big gains
- pulley - drive supercharger harder, good gains
- intake - restrictive stock intake slows the car down; open it up for good gains
This formula has yielded approximately 50-70 whp on B8 S4s. Excellent and a real game changer.
B7 RS4/B8 RS5
- exhaust - eliminate cats, open up exhaust diamater to 2.75" and add an X-pipe crossover AT THE APPROPRIATE SPOT…not just randomly placed; good gains
- tune - JHM has had good gains by making a myriad of adjustments to the high revving 4.2 FSI on the RS4 and R8. That formula will apply to the RS5 too. Unfortunately nobody else follows it…but this is where you can make good gains.
This formula has yielded 30-40 whp on B7 RS4s. Excellent gains and a real game changer.
Mix those two formulas up though, and they will each yield a fraction of the gains on the other platform. So you can’t transpose what you learned on the 3.0T to your RS5.
Most tuners on Audis are used to bumping the boost but that is impossible on an NA car. So most of them are stuck. APR, the biggest tuning company in the world, consistently added ZERO HORSEPOWER to B7 RS4s with their file. Shocking right? not really. They’re used to tweaking boost for 90% of the tuning gains available on 1.8T and 2.0T cars. Once you take that away, you find out they weren’t so good at finding the other 10%. That’s why they got the reputation as the ‘safe’ tuner. Really they were the ‘lazy’ tuner who didn’t really try very hard.
On an NA Audi, the tune is a different animal. You can’t just throw some timing and AFR at it and call it a day. You’ll see nominal gains. I once posted that APR’s tune only changes 4 things…ignition timing advance, AFR, rev limiter and speed limiter. An APR employee replied ‘yeah…well what else is there?’. JHM’s B67 S4 tune that we were comparing APR to made 80 changes at the time. It’s currently way north of that. Why? The tuner knows how to tune an NA car for power. He didn’t follow the turbo tuner 101 roadmap minus the turbo part. He followed the NA tuner road map.
The intake is another story. Next time you get the car nice and hot, go put your face near one of the intakes. Feel that? That’s 150 degrees of radiant heat. Want an open intake with a fancy carbon fibre top? You’ll start sucking in that hot air. Think your car can make power sucking in hot air? The DA in your engine bay is around 10,0000 feet.
You need the stock intake on that car, and on the B67 S4 and B7 RS4. And R8. Opening them up might make a 1.6 litre honda sound better, and might make a 3.0T SC V6 B8 S4 accelerate better, but it will make your 4.2 high revving FSI V8 car slower.
Make sure you get a bunch of pictures 
Saki, well this is turning into another education. Pictures of the RS5 engine dropped down, another thread this site, clearly show, as one poster stated, the RS5 cats are part of the tubular exhaust headers…welded? Obviously not easily removed. I know there is a VERY expensive system out there, Kline(?) but not going to pop for that. No matter how crazy I may be it appears stock is going to stay? Thanks
Yes sir, will do.
Saki, intakes? There is one out there for $3500 made in Japan and takes 4-6 weeks to construct. Allegedly it’s heavily insulated to help keep the intake air cooler. Stock system looks very capable. Started thinking about installing my Aquamist system on my RS5 but was spanked…ouch! What do you think? Thanks
$3500 for an intake??? wtf :o :o :o
[quote=“drob23,post:32,topic:7374”]
$3500 for an intake??? wtf :o :o :o
[/quote
Well, they lowered the price ;D
Water/meth is also pretty pointless.
the best thing you can have for modifying your RS5 is patience.
being first isn’t good. B8 S4 headers showed lots of people that fact. Wait for the market to develop. If you want us to give you thoughts about stuff, post it up. Nobody will fault you for asking for help. That $3500 intake sounds a bit silly. JHM will have a $7900 intake that will make you 100 hp next year. I’d wait for that (Vortech V3 supercharger) or else just sit tight on the stock intake as noted above in that long post.
Reality is the RS5 is a 450 hp stunning creation that sounds fucking incredible. It’s easy to be patient with it.
Truth.
2.5 years later, my RS5 is still stock (power-wise).
Whether I’m patient or not is irrelevant. Not much out there for the RS5. Thanks
There really isn’t… 
that’s because APR and GIAC don’t know how to make NA Audis faster. Simple. And they’re the two big shops. They may have a tune for you…but as mentioned, it will do just about nothing.
Once JHM gets into a platform they typically produce 10-15 performance parts for it.
JHM RS4 launched with this…back when the supercharged RS4s were running 12.6 lol…
www.youtube.com/watch?v=lhDcNObZLpo
But it was 3 years after the RS4 debuted here, and after JHM themselves bought an RS4. Since then they have produced a plethora of RS4 performance parts:
Tune
Downpipes
Catback
Intake Spacers
LW front and rear rotors
LW crank pulley
LW flywheel
Short Throw Shifter trio
stage 3, 4, 1R, 3R and 5R clutches
Vortech V3 SI supercharger kit
etc.
Same will happen for the RS5 if there is a market
Do we have sales numbers for the platform?
Would it be comparable to the RS4? How many of those sold in NA in 2007 and 2008? 2000/year?