Not to veer too off topic but since I know rs4_saloon I want to chime in. He was well informed prior to his purchase so I don’t think it is a big deal that he is happy with his exhaust even if it is not the most popular choice on this forum or otherwise… He has not claimed it is the most efficient/power making exhaust out there. He know’s it’s not, he wasn’t duped and his priorities may differ from others. ok - no big deal. He likes the sound (as did I when I heard it at the last run), he likes the quality, the looks and the performance it yields. Nothing wrong with that. It may not be slower than stock - none of us really have solid proof from real world road/track testing, just speculation based on theory from flow analysis via various tubing diameters. Weirder things have happened in engineerings tests right?
I own the JHM 2.75 exhaust and I’m looking forward to installing it. I also own Tubi cans, love the sound and the quality and the looks of the quad tips has actually grown a bit on me. When I install the JHM system I plan to really give the Sebring’s a chance to break in and see if I like the sound. If I really can’t take them or just miss the Tubi sound more I will swap the Tubi’s in with the help of a qualified exhaust shop to help with the reduction. I may end up loosing a touch of flow or power but I’m not concerned. I am performace orientated when it comes to priorities but not at any cost. I will put flanges in the back though so I can swap mufflers at will just like I will up front so I can swap between cats and catless. I like to try different set-ups and want different optoins for different events/reasons etc. It’s all good imo.
I had my butt dyno calibrated last week and it is pretty accurate ;D
I agree combo of different methods of testing does show the complete picture when it comes to performance.
But all I can say is when the AZ member heard RS4_Saloon start up the beast it was instant kid in a candy shop amazement…he honestly could not believe how the car sounded and he further could not believe how it sounded when we took our little ride afterwards.
all valid points. You mentioned statistics and increasing the sample size to get a better idea of what might fall in the 95th percentile. I personally have never been to the drag strip so I know very little about the cost of it. I have had my car dyno’d and that too costs money. That’s why I personally resorted to getting the vag-cable and just doing log collection on the same street. The one big variance that can come up w/ log collection is the outside temp for your runs & altitude. I feel w/ log collection, you can create a larger sample size b/c it’s a one time fee (the cable) as opposed to paying to run on the strip or taking your car to the dyno over and over again. While a large sample size is important, i think reducing the variance is critical as well so there is fewer analytics involved in translating a 1/4 slip to what your mod actually did for you.
Perhaps I will give this 1/4 mile thing a shot to see what this fun is about. Swesna, let’s go.
MMA aka RS4_Saloon…I can bet you will do very well in the 1/4 mile…you are a very good driver…i have no doubt on your abilities at the 1/4 mile…would be great to see…once the weather gets good we will go and then post up time slips…this time i will make sure they dont fly out the window.
…and that’s why you shouldn’t speak about the 1/4 mile. We aren’t talking about launch control cars. We aren’t talking about auto/double clutch DSG cars. We are talking about comparing RS4s to RS4s.
Further, we are not talking about elapsed time…we are talking about trap speeds. Trap speeds don’t vary much. elapsed times do…but has anyone in this thread asked for your ET? I think I pretty clearly said trap speed is what we are looking at with most of these cars.
Go have a look at my thread titled ‘New Stock RS4 record today’ and have a look at the 13 passes I made. 8 of them were clean and full out (excluding missed shifts, shake down runs where I was just getting a feel for the car, or one run where I forgot ESP on, then just cruised the track), and in 7 of the 8, the trap speed varied by 1.0% or less from the absolute highest (108.36 MPH). The other varied less than 2%. You are not going to magically increase trap speed by being a good driver…and you are not going to ruin trap speed by being a regular driver. It is a reflection of the car’s ability to accelerate from 0-1320 feet. It is very consistent unless you change the car.
As for cost, are you seriously worried about the cost of the dragstrip as a test? It’s $20-30 to go…and you might go 3 times over the life of your car as far as ‘testing’ goes. In reality you may go a few more times because it’s fun as hell going 120 mph without fear of police intervention. Your vagcom cable costs $350. Your dyno runs cost $60-100 a pop.
Further, speaking of costs…aren’t you the guy who bought a Capristo!!! lol. re: cost, did you buy Manny’s old exhaust? If so, I reckon cost will be a non-issue for you as the used price on a good exhaust rarely changes much. You’ll probably sell it for what you paid for it, a la NY07RS4 and his tubi. Another super expensive exhaust option, but if you get a good deal on one preowned, you can basically rent it for free for a few years.
Sorry if I slammed your exhaust above. I’m speaking from a logical point of view, about an entirely illogical pursuit, performance cars. Clearly I’m not 100% performance oriented because, if we want to use an analagous example for the exhausts, the RS4 is the Capristo of this automotive segment. By far the most expensive, and slower than the M3 and C63 with which it competes. Throw in the CTS-V and we look really stupid. Of course none of us regret our purchase, so I understand where you’re coming from.
lol I never said that. I said many of the outspoken douchebags on quattroworld are clueless on performance and are just chequebook enthusiasts. They act like elitists and talk down to people because they don’t own an RS4. i.e. they come into a thread, embarass themselves by showing us all what they don’t know, then try to belittle the sensible posts that expose them as clueless by saying ‘how would you know, you don’t even own an RS4’…all while they’re talking to a chemical engineer whose knowledge would spin circles around them.
Obviously not everyone over there, but a handful of morons love to perpetuate this stereotype, and do so on any forum that will listen to them.
So we have RS4_saloon with a Capristo catback and an otherwise stock car?
Then we have swesna who has who knows what on the car…still stock I think but about to be modded.
Then we have the new guy Mark who posted that video thread…and has ‘a bunch of bolt ons’. What exactly?
Would be good to see you guys do some pulls. Maybe since you are all so scaerd of variables etc., just line up in third gear at 2000 RPM and then rev out to 8000 RPM. It will be the most anticlimactic race ever (I did this with Mistro once to show him that his carbon concerns were overblown) and it took ages, but was pretty effective.
I had to google that word…your vocab is much better than mine.
Hey…my house is not one of those. I bought a cheap house in a well off neighborhood.
One of the houses we went by recently sold for a little over 2M and they pay 48K per year in property taxes…therefore I try not to speed down their street out of respect.
Just capristo and 20k into my last CC. Was tuned for a few miles but went back to stock. I think Mark is running a tune, miltek cb and about to put on some dp’s.
as for that race, it’s kind of awkward. Mistro and I did it because he has a 90,000 km (55,000 miles) RS4 . When we first met I asked him how he liked the car, and he said ‘I think I have a carbon problem’.
I had just returned from the dragstrip where I ran 12.94 @ 107.7. Clearly I don’t have any carbon buildup right? I mean nobody can run 12.94 @ 107.7 in an RS4 with carbon buildup right?
So I suggested we do a pull in 3rd gear to see how bad it really was. We equalised the weight in the two cars, and lined up from around 30mph…then rode third gear out to the 100 mph rev limiter. The difference was maybe 1 foot gained by my car. So we could surmise that his car was also capable of a 12.9 @ 107 run, thus he’s not really losing all that much to his 55,000 miles of carbon buildup.
Since then my car has gone 12.75 @ 108.36. Bone stock. Oh…and it has never been carbon cleaned in 35,000 miles. I really think the RS4 community needs to worry less about carbon buildup and more about their driving and enjoying a great car. The claims that carbon kills the car are overblown. Not that it doesn’t suck…I am sure I am losing a little top end…and I am not happy at the prospect of a chunk of carbon making it’s way into the cylinder and scoring a wall like happened to BenSTi’s car…but I don’t think it’s knocking 40-50 hp off the table the way people are acting. The biggest loss is from about 7500-8250 RPM with carbon buildup…and I shift around 7500-7600 at the strip or in pulls while WOT so I am not too concerned about that zone. My logs and timeslips tell me the car falls off a bit up top.
Just basic stuff… milltek catback, unitronic tune, K&n drop-in, 034 maf hose, JHM lightweight rotors, and i just picked up the 2.5" XS downpipes from your buddy swesna.
Unfortunately though, I got into a fender bender in the RS4 this past weekend so it will be in the shop for a little bit getting fixed up. Then the downpipes will go on.
Oh and hello by the way, nice to meet everyone, I lurked here for a while but decided to make an account. Looking forward to more info and developments with the B7 RS4 platform.
