Yeah Billy, Joey, and I were talking about this tonight. The traps seem very similar.
415RWP is quite possible with just a tune but the car has only been out for like 2 years now and people have only been running at those power levels for a very short time. And already there have been multiple documented on forums turbo failures. So it might not be as cheap as most people are thinking. Word is if you go back to BMW of NA to repair your vehicle aftger one of the turbos grenade and want any hope of getting your warranty back than your shelling out close to 25 large to replace essentially the complete drivetrain.
It’s mostly the boost/timing.
The interesting thing is the power near redline where the boost MUST be falling off.
The turbo itself? That’s surprising.
Yeah, as you can see in the graphs I posted up on the previous page power is dropping off at like 5500 and above, peak torque is at something like 3000RPMS
From what I have read it seems like the turbo is just being overspun, ran to hard for to long. Destroying the bearing surface and in turn destroying the turbo and than wrecking havoc on any component in its path.
Another thing is that these tunes are already hitting approx 85% injector duty cycle and the system uses a highpressure fuel pump with direct port injection. Not exactly the most highly aftermarket supported fuel system.
I love how you guys are saying RWHP…isnt this a AWD car??
Yupp :mwahaha
His is, though the examples I have been posting are RWD. This engine comes in many different vehicles. the 1 series comes only as RWD but the 3 comes in both RWD and AWD.
Yep. The graphs don’t show the boost levels so I can’t see what it does actually hold. If it holds the same near redline, then the increase is the tune which is what I was wondering.
That sucks regarding the turbo. I know a lot of people who run them way beyond efficiency without issues?
What diff does it make? We all know that it’s WHP that we are referring to.
yea i have also read the stuff about turbos grenading, im kind of worried about that. i noticed that once i get to about 6000rpms the power drops a ton
Yea, the turbo cannot support the boost pressure.
That’s nothing new. A TON of stock cars are like that. The grenading is a major concern.
the 1 series has gotta move…
the new 3 series seems really big compared to the older 3 series… maybe the 1 series is the new 3? 
the chip came with a map switcher i put on my keys so i can change it to stock or v3 map and it defaults to stock at start up so thats a good thing.
personally i found the 1 series they loaned me really really ugly looking
Well like I said before, the engine is still very new here in the states and people have only been running these power levels for a very short time. The turbo is also a one off designed piece for BMW, who knows if there is something inherently wrong with the turbo design its self. The car also had rather extreme overheating issues when it was first released as most cars didn’t come with an oil cooler, though it is included in all cars now and was retrofitted into the cars that didn’t come with it from the factory. So maybe the turbo failures are coming from these cars that already got damaged through excessive oil temps?
Personally I was looking into a 135i but the issues I have read about the turbo and BMWs hardline stance against the aftermarket as a whole has made me look at other options.
Here is a boost/time graph that goes with the previous dyno graph I posted before. The one with the 3 cars on it…
me and joey raced tonight. he pulled on me pretty hard when he caught traction!! what do you trap in that car joe?
As you can see the boost holds pretty well until redline but the power is dropping pretty well, so I would assume that turbo is being pushed pretty far out of its efficiency range.
:rofl was thinking the same thing
His car moves pretty good for sure, we did a few runs tonight :ninja ;D I’d say he def. traps around 111-112mph. Once my car got traction :headbang i pulled pretty good (if i had to guess i’d say 2-3 cars on a clean run ) plus we had traffic in front of us. His car is about right for a 112 trap car seeing i hang with Nick’s S4 on race gas which is a 117-118 trap car.
Def. an awesome bang for the buck though. Have to say the new 335xi and 135’s are 2 of my favorite cars after seeing their performance with VERY minor bolt-ons
If i had to guess i’d say around 117ish because that’s what Nick’s STG3+ S4 trapped (117-118) and we were even until about 120ish then my gearing owned me. You’re def. a 110-112 trap for sure
wells chucks ipod says im pushing 243 hp and running a 13.8 quarter :lol
yeahhhh that thing is WAYYYYY off…it said i was making 106whp and running a 16.4 1/4 mile :rofl
They all look very similiar.
Yep. Makes sense given the size of the turbo.