[quote=“audios,post:21,topic:40027"”]
ugh the misinformation in this thread.
viper…you are the worst…
even if modded these cars are hit or miss.
are they hondas? no. but driven responsibly and like xander said, with proper maintenance there are 0 issues.
bracketracer touched on some of them. if you want to get into turbos blowing up it is a matter of asking the turbo to do too much. k03’s are FINE if kept stock, and the car is boost leak free. mind your oil temps and aside from that wail on them all day long, even at high rpm.
you chip it and thats where issues are. chipping the k03’s to a requested boost of 1 bar puts the turbos out of their efficiency range at anyplace above max tq. this is where alot of people fuck up their turbos…asing the turbos to supply air at redline, which is exponentially more effort than what they are capaable of alrady producing at 6200 roms or so…
but that being said you can still have alot of fun with a chipped s4 below redline…you dont make much power ater the efficiency drops off anyways…for obvious reasons (heat being the major factor)
so take care of your tbb, ic end tanks, charge pipes, and your turbos will be happy. never put the car freshly hot or else the oil lines that are too close to the exhaust housing will cook oil and this could damage the bearing…to me thats obvious and should be done with any car.
control arms…i have had 1 go bad in 5 years 60k miles. not a big deal
buy the car with the future turbo upgrade in mind…you will want to do it no matter what, it helps your resale, and you can appreciate the car as it should have been brought here as. when i upgraded to k04’s, i was one of 10 people who did it first. i ran my car with k04’s at stock boost and loved it, it was a great car and trouble free.
until i beat on the transmission. thats my fault though. dont expect a trans thats attached to 3800#'s to deal with hard shifts that put stress on the synchros. if i never had auto-x’ed my car and shifted like an idiot i would prolly have my stock one still in it instead of an rs4 trans.
there. i could go on for hours, and i would love if you didnt buy an s4 because i am getting really tired of seeing them all over now, but truth is they have a bad rap, and are a good car…esp for what you get
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actually the ko3 are efficient until 15psi @ 6500rpm…
ko3s are until 17psi at 7200rpm…
EDIT:apr’s 93 flash spikes at 18psi, drops to 1bar (14.7psi) then after 6250 drops again to a safe 12psi making them efficant until redline… my tweek is holding the waistgate closed just enough until 7000 @ 15psi therefore having a flat torque line until redline (not destroying turbo)
now that doesn’t mean there making the same torque as they were at say 4000rpm but they are not blowing hot air until these points…
ko4 = ko3s with a slightly larger compressor and half the blades =)
I need to upload my dyno sheet… 225hp @ 6950 and 259 pound feet @ 5000 rpm (using apr’s platform and my tweeking) on my colleges mustang dyno. (Ohio tech) with a ambient temp of 68 f. in 4 gear. (almost 1 to 1)
if left stooooky the s4 will be ok in terms of engine wear and tear, but the b5 suspension is way too over done for the roads of the us, therefor they are renowned for there control arms etc.
the get a GTI was a joke, there not really in the same class at all, but the little snails on there are not that bad =)…
but listen to bracketracer for he is the most knowledgeable on this topic…