n54

Im hitting no where near my peak boost, a previous log showed me hitting 7 psi at peak, but now im only hitting 5.

Hello, I'm fairly new to the forum and this is my first post, so I apologize if it ends up in the wrong place. I am in desperate need of help. I have been having a problem for the last 3 months now where the boost builds to around 20psi and then it drops off quickly. By the time the half...

In Canada, don't have E85 here. Highest is 94 on pump (weird that its one higher than 93 in America? Anyways). I have a stock 335i and here is my mod list that im planning on purchasing, will this land me at 400whp? VRSF CBE Street VRSF Catless DP BMS DCI BMS CP + Tial BOV VRSF 5" IC BMS Stock...

Hello, I'm Nick and I am currently trying to figure out everything that I will be needing to rebuild my engine(N54 2008 135i 8 Bolt Manual @174,XXX Miles) to OEM Spec. I am Planning to get Hydra HP650 Turbos and aim for 550hp with headroom. To my understanding, the stock n54 motor with no...

Hi guys, Please have a look at the below logs. Does this look like HPFP failure? Basically what happens is, if I pull the car in WOT, I get a 29DC error code - injector shut off. It will then miss horribly, until I clear the codes. **Logs were taken with a leaky injector #1, which has since...

Hi All: After scouring the BMW-related forums, I have been unable to find definitive answers to my emissions-related questions regarding my N54 with catless downpipes. I understand that the answers to these sorts of questions can be specific to a particular vehicle's problems and...

I want to take the next step in the tuning of the engine , but I have some limitations to do this. I live in the Netherlands, that means I can't eliminate the cats in the downpipes, because then the car will fail it's yearly inspection. But downpipes with race-cats are almost impossible to find...

Hello everyone, First and foremost, I've been reading the forums here for a very long time and got a lot of knowledge for my 2 cars, E92 335xi and E46 325i, so thank you for that. It's sad that this has to be my first post here, but that's just how the situation is. Long story short: I've been...

i know theres a couple posts about white smoke or smoke in general turbo seal etc but i been on almost every e90 and 1addict post form related to n54 smoke i couldnt find my exact situation. i have a E92 335i build date july 06. i bought the car with bad turbos and almost everything neglected i...

For those that would like to integrate the Low Pressure Fuel Sensor (LPFS) from the 135/335 into their Z4 35i/s I made this tutorial video. The video covers the mechanical and electrical aspects but you will need to consult a tuner for the firmware integration. I’m currently using it in...

Hi everyone I have been doing lots of research to find a set of reliable big power twin turbos that are available for the N54 market in 2023. With lots of light being shed on modern N54 v3 and v4 17t's & 19t's I have decided it would be smarter to stick with reputable brands, mainly due to the...

Selling a set of Hydra HP800s with ARM relocated inlets. I decided to change direction and go single turbo so I no longer have a need for these. They were only run for 6k miles and are in perfect condition with zero shaft play. I’ll also include a new turbo install kit with purchase. Asking...

I am just wondering what y'all think about n54 twin turboing either my 92 accord or my 86 jetta gl deluxe

Hi there! I'm here to research for my upcoming n54 swap and to learn all things boost! I currently have a 2005 bmw 330xi (e46) that's basically stock apart from the custom long travel coilovers, custom built winch bumper and roof rack, full underbody skid plates, 4.44 diffs, and 30in...

Hi, And hello to everyone on Spoolstreet. My beloved 335i n54 has come to the point of 100k miles and it's time to move on from twins. I'm planning to move to Doc Races bottom mount single turbo kit with 6266 gen 1. I try split my typing into segments, so I can explain everything I will do as...

Hey all, I know I might sound like a broken record, but I am still trying to figure out my 2A87 / 3100 errors and it is driving me nuts. I have run though a whole bunch of advice from this forum now and am just about out of ideas without it settling on being a cam ledge issue that I still don't...

Hey guys! First time poster here, to start I have a n54 with a doc mount 6266 top mount kit. I was hoping I could post my logs here and see if anyone could help me figure out why I have so many timing corrections . The car is JB4 with a JB4 bef , fuel is full e85 although the pump I go to only...

I recently gambled on a 335i from across the country for only $3,500. Once it showed up, I realized it had 19T turbos, FBO, inlets, outlets, etc :fearscream: Enjoy my buddy and I's first reaction once we realized how fast it was...

So once I realized the dilemma of needing oil catch cans after installing the valve cover. Due to there being no cyclonic separator, as well as not being able to reuse the OEM PCV or CCV (Crank case vent hose) as the 2 ports (high/boost and low/vacuum) on the M18 VC are both just -10AN. I then...

I've finally started to install my Speedtech kit on my 1er. I figured I would post some progress pics alongside asking for some advice. What vacuum lines are recommended by other st owners? Do I leave both waste gate solenoids connected but out of the way, I have a 3 port Mac but no use as I am...