I know all 3 of those are good at 2 bar to 7100 rpm's. I am not sure if you can get by with the 3071 without it tapering down by 8k to 24-26'ish psi. I would bet the other 2 can handle that without a problem. I know the 3076 can make 40 psi to 7100.
I have a 2871R and love it, spool time is great and does pull hard all the way up to 7500. Mine is daily driven at 18-19psi I hit that everyday, i don't know the numbers on that but it feels good.
Garrett t3t4 here, NO restrictor. 3+ years and no issues.
Plus I had an elim 28rs on my a4, it was pretty nice... And never gave me any problems, and I drove the heck out of that thing.
I have 155K+ (chipped at 100k) on the original ko3, It has outlasted the clutch (100k) and exhaust (135k) full synthetic every 5k, always cool down after a hard drive. Still solid.
Well if it matters I just hit 108k miles on my k03s. Been chipped since around 60k. Added a tbe at around 80k. I used whatever the dealer told me to use for my warranty period (50k) changed every 5k miles. I switched to full synthetic since then and still change every 5k. Change the plugs every 40k until I switched to the NGK 7Es which I change every 10k. Timing belt every 60k, fuel filter every 50 along with tranny fluid. I just hit 108k yesterday and I still have the original clutch and dv.
IMO, the minimal increase in power is not worth it. I wasted countless time and money on this turbo and was disappointed in the end. I have since stepped up to a 28RS and am beyond please with the jump. Spool time on a small frame BT is minimal, and 300whp is plenty streetable no matter what some say. I have a k04-001. With meth, I put down a reliable 225whp all day long (and that's on the ole' heartbreak dynodynamics dyno). She holds her power, too; peaks way later in the rpm range unlike the wily k03s, yet is still @20psi when you turn the key. Is it fun..yes. Is it worth it monitarily...meh. At best, it makes for a great auto-x setup. Don't expect to do much damage beyond 3rd gear, though. I will be upgrading in the near future to a T3s60 or 28RS if that means anything to ya. I've had this setup for less than six months, and expect it gone within the year.
I just replaced my 2015 TSI 1.8 after it lost all compression on #4 cylinder. It is IS20 turbo with the APR tune.
I’ve had water pump failure, AC failure, windshield wiper motor failure and an oil leak due to the turbocharger on top of your normal tire, brake, rotor, windshield and oil maintenance.
Cardone parts in general are not good and their remanufactured stuff is more like they washed it and put it in a new box.
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