My first post here, joined a few days back and have been reading pretty much everything. Great to see a site where I can be sure there’s nothing being held back.
I found this thread on the vortex, poster claims to have lost power with his miltek exhaust on back to back dyno’s on the same day. Has anyone heard of this?
http://forums.vwvortex.com/showthread.php?5584445-what-do-you-guys-thinks-of-this-30lbs-from-exhaust
Welcome to the forum bud… I actually lost tq on the dyno with the strat intake but cut ET and gained MPH at the strip so that is why you have to be careful with dyno readings… I highly doubt the exhaust causes a loss of power but it isn’t going to gain too much either IMO… In 2010 I ran 12.38 with tune and intake and then 12.22 with tune, intake and exhaust a week later and the DA was about 600-700 feet better so that helped as well… I think an intake will help these cars more than exhaust, catback at least… headers and HFC’s is a different story… Just my .02
Luis- welcome my man.
I agree with Prime. Not much to gain with cat back. Doubt you will lose power though.
Regarding Milltek… weren’t you the one that told me your exhaust weighed more than the stock exhaust? Just found that weird for some reason.
Cat back stock exhaust for me was 54.5 lbs.
Awe tuning cat back was 46.5 lbs.
I shed 5 lbs per corner with my winter wheel setup and ~8 lbs with exhaust. a whopping 28 lbs so far 
LW rotors are next and a 10-15 lb diet for me lol.
You’re gonna feel faster with the upgraded soundtrack from Milltek. ;D
Hey man! Doesn’t seem like its hurting me much staying stock…
12.08 + intake = 11.98 ;D
Well yea, I didn’t expect to gain much. I just don’t want to be taking a step back. And yea when I did my crude weight it was heavier by about 10lbs. I weighed myself and the stocker and then again with the separate pieces of the miltek. I subtracted my weight and it was a 10 or so pound difference.
lol yes. You know I never really looked closely before but that hose is smaller than the TB…I might do like you said. Get an intake, change it at the track, change back after.
…sorry I’m a noise nazi, if it isn’t a cross-plane V8. I don’t even like the flat-plane F430 growl unless it’s being wrung out. Although that car has a nice set of bypass valves…hmmmm…idea…
or maybe 12.08 + intake + 700 foot drop in DA and better hookup = 11.98 (and 12.08 + stock intake + 7000 foot drop in DA = 11.92)
my take on exaust systems are that you really need to show where the stock unit is lacking to be able to start the argument that anything different is needed.
Can we see a pic of the stock B8 s4 exuaust someone can share
I’m on vaca until monday night. I’ll try to get a pic up when I have a chance
ms paint=apr?
need pics anyway
What is the stock exhaust piping size? I know the Milltek setup is 2.37" and that seems ridiculously small to me. It does sound great though.
Although with it making similar power to the RS4, and it’s boosted wouldn’t it benefit more from something closer to a 2.75" setup? I know Awe offers a 2.5" setup. Based on Justin’s tests with our V8’s I would think the same principle applies to the V6’s as well.
an NA engine requires perfect exhaust setup to draw the air out of the engine (which can actually help draw air into the engine on the intake side) however a supercharger just rams it in there on the intake side.
So it’s less important, but still important to a degree.
I asked this ages ago…has anyone actually tried to figure out what is optimal? Or done any testing? I still haven’t seen an exhaust discussion ANYWHERE in B8 land that addresses these questions. Just this thread.
Welcome APEXIT. Your car looks pretty frigging fast (10.87 for a 60-130 time…wow!)
*10.1 - Ferrari F430
10.3 - BMW M6, stock, 2-shifts
*10.4- E60 M5, stock, 2-shifts
*10.48 - C63 AMG with headers and flash
*10.93 - E63 AMG
10.9 - Nissan GT-R
11.0 - Shelby GT500, stock, 2-shifts
11.7 - Ferrari Challenge Stradale
Here’s the list of 6speed cars, including APEXIT
10.13- Acicchelli / Stock F430 / 3-shifts
10.18 - madsex343 / E92 M3 DCT with exhaust, filter and tune
10.71- DLSJ5 / Bolt-On E92 M3 DCT / 3-shifts
10.72- Acicchelli / Cayenne Turbo S GT700
10.87 - Apexit1 / Audi B8 S4 / intake,exhaust,tune,pulley, 6-MT
-Slavik10.93- Acicchelli / Stock Mercedes E63 / Auto
10.97- WK446 / Nissan GT-R with updated Launch Control firmware
11.81- HoustonT / Stock Lexus IS-F / Sequential
12.42 - TheCPE / 2012 Mustang GT with mid-pipe and tune
Here is my AWE setup. also ~8lbs lighter than stock unit.
Saki- Apexit is coming to our handicapped (or shall we say…level :P) test track to retest and compare to our list next week.
I also have a GIAC 93 car coming. Should be good.
hahaha
if 2.99 percent negative grade is 1 second in 60 to 130 I’ll be shocked
what are ape’S MODS? And what was the da when he did that?
He was apr stage 2 v1, apr intake and miltek exhaust at time I believe. Ran ~12.5@track too. No clue what DA was.
That time just doesn’t make sense.
He will run mid 11s at our private track. I’m pretty sure. He isn’t making more power than any of the other cars that have run with v2. And there is only one shift with v2 so it’s not like there is any more time to be gained or lost.
Yea when I made that run we wen’t out looking for a 2.99 decline. If you saw the road it was done on you would wonder how they allow such a large change in elevation. Don’t remember the DA but it was in the fall I believe of last year. Tsivas has the mods right, add in lw wheels and brakes.
edit: latest 1/4 time was a 12.44, working on that 60’