single turbo

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...

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...

Hi all, I've just installed a SLG Ford 8.8 LSD, Axle, solid diff. bushings, and driveshaft setup into my 6MT 135i. This is a dedicated half mile & 60-130 car. What additional parts should I add to the following list to maximize straight line traction? - 15 inch rear brake conversion -...

I just finished my single turbo conversion a few weeks ago, and I want to turn up the boost. Currently with 14psi springs I get ~11psi w/ JB4. Map2 is 17psi and I'm not sure if that is safe as I only have 91oct available. - What is a safe level of boost on 91 octane? - Also, for JB4 Map6 can I...

Welcome to my post. I’d like to introduce our new JMC Tuning Single Turbo Kit for the N54 platform. https://jmctuning.com https://www.facebook.com/jmctuning https://www.instagram.com/n54development/ We have spent the last two years developing the kit with the intention to create a specific...

was wondering if anyone can help me out single turbo n54 GFB three controller mac solenoid used to buzz when I turn the ignition on I thought it went out so l bought a new one and it's doing the same thing not buzzing and car is only getting 11 pounds of boost but when I put a manual boost...

hey guys so earlier this year i purchased an 2009 e82 n54 powered bmw with the intentions of building a more or less dedicated drag car. i will start by saying i still have plenty to learn about cars, im not a professional mechanic just another average car setting out to build a car that rowdy...

Hey! I made this post to hopefully help out another single turbo n54 owner looking to pass emissions. Information on my car - 2007 335i N54 On3 single turbo kit Manzo catback exhaust E60 mix on a custom tune (jb4 + mhd bef) I am in Colorado, typically for a 2007 they would do the test on the...

This sensor recommendation is unverified, proceed at your own risk. Lately I've been hearing through the facebook grapevine of 550i O2 sensors being recommended for single turbo use. Then someone else told me they are the same as ADV, but I'm not sold on that claim. Realoem indicates they are...

Hey guys I´m new on the page, I am on the procces of making my 135i n54 09 to doc race st 6266, i have doubts about how the motiv boost box works with the mhd, and how is connected the mac solenoid to the wastegates So how do I use the MHD to control the Motiv Boost Box or does it control...

So the time has come to start weighing the car since round 1 of fab work is now complete! I thought 2700 lbs race weight without a driver was a bold goal when Efab Motorsports and I started down this path of extreme weight reduction. I think it is very possible this is the lightest E90 that...

So, I want to single turbo my '09 e93 n54...but I find that I am already running into some issues with FBO because of lack of e93 things :( If anyone has any info or advice on what route I should take in order to single turbo and push 900+ hp! Currently just have just air intakes and...

Threw the car on the dyno today since I hadn't done so since swapping my auto to manual transmission. Vi engineered top mount kit with a Garrett GTW 6465 BB turbo. E85 out of the pump. Content unverified, but it usually test at 85ish %. 100* degrees in the shop at the time of the dyno(summer in...

Thought I'd make a thread to collect some data on O2 sensor options for the single turbo peeps. As everyone knows, 2-bank fueling logic forces ST kits to place the pre-cat O2s in the manifold between the head and turbine, exposing them to extremely harsh high temperature and positive pressure...

*** Updated build sheet 2021-06-19 *** OK I lied.....it's never been my daily but I haven't driven it much in the past 3 years so decided to turn it into a dedicated track car. I needed a hobby anyway lol. Background Bought the car in 2012 and went full bolt ons over the next few years. Last...

Hey guys. I'm not really in a rush to sell it, but life and other circumstances are forcing me to re-evaluate my current situation. Please no crazy low offers. I stand to make absolutely nothing from selling and I am at a loss overall considering all the money I put into it after I bought it. I...

Alright I’m hopping back into the forum life, something which I haven’t been a part of since I used to ride motorcycles. Recently took the plunge and picked up a car I’ve wanted for a long while now. I’ve wanted an E61535xi ever since I ran across several build logs years and years ago. Well...

Hi everyone and Happy New Year! I drive a single turbo (6266) e92 335xi fitted with the infamously sluggish zf6hp19 6-speed auto that can't hold power, and it's slipping with only 18psi. Instead of doing a rebuild or swapping to a manual (it's my daily and I live in busy NYC) I thought of doing...

FS: Refinished style 162's asking $650 obo (local pickup preffered, will ship) WA

I'm trying to disable some O2 emissions system check codes to diagnose my car. It's giving me a lot of grief throwing heater, function, system check, etc. codes for the Pre-cat O2 sensors on my single turbo setup. AFRs will lean out and it'll drive like s#&t until the codes are cleared. All the...