Guide to B58 Tuning "Stages" and Recommended Upgrades
all right guys we're back staring at my engine bay and in this video we're going to talk about the
recommendedupgrade path for your b58 so we're going to talk about basically the different
upgradesthat you can do to your b58 and about how much power it can make and kind of just help you plan out what you want to do with your build if you kind of have an idea of how all this works but you just want to see expected power outputs i'll put that at the end of the video and i'll split it up based on the fuel type that you're using and
upgradesto get you to 400 500 and then 600 plus horsepower so feel free to jump to the end of the video if that's your primary question or what you want to look at so with the b58 it's not like typical turbo engines and you're not going to need to do a lot of
upgradesthat are required for other turbo cars primarily because our cars have an air-to-water intercooler and also because it comes with an extremely efficient and capable cold air intake from the factory so the first thing that you'll want to do is flash a stage one tune and the stage one tune works with a completely stock car you don't need to upgrade anything you can basically just run your car as if it had a more powerful tune from bmw so it won't make any extra noises it won't have any weird smells or anything that can come with...
you know downpipes and exhausts and intakes and in that case your car will basically be just like stock so i feel like that tune is really underrated i ran stage 1 93 and then a stage 20 30 map for several months before i really started upgrading the car to make a lot more power and it was great i didn't have anything to worry about it was very under the radar i just could enjoy the car anytime i wanted to now the next upgrade is going to be a downpipe and this will set you up for what most companies call a stage 2 tune and the stage 2 map is going to be pretty similar to stage 1 but it's going to update your fueling and your airflow and everything to account for the additional flow you'll get with your downpipe it'll help spool the car up quicker and it will help it hold a little more power to redline so this will give you kind of a marginal gain as far as peak horsepower but you should feel a pretty significant change when you're driving the car so adding a downpipe will kind of give you a marginal change especially when you're comparing it going from stage one to stage two but it will help the car pull harder you will see an improvement in your times because it helps the turbo spool faster and it also helps it hold more power to redline so that's a relatively cheap upgrade especially if you can get away with a catless version to get a little more power out of...
the car now the next upgrade would be a high pressure fuel pump upgrade and this will allow you again to turn up the boost run a lot more torque in the mid-range and a little more horsepower up top the peak gains are actually in the mid-range because the turbo spools so quickly that the high pressure fuel pump allows a lot more boost in the mid-range but on the top end the stock turbo still has a tendency to run out of steam so a lot of times you'll see dinos that show huge gains between like maybe 3000 and 5000 rpm but up top you know towards red line the gains are kind of reduced the car still does pull a lot harder and just like when you add a downpipe you'll see a noticeable improvement in your times so pretty much at this point you've achieved what the b58 version of an fbo or full bolt-on would be you don't need an intake you don't need an intercooler a charge pipe or heat exchanger all you need are those three mods a downpipe a fuel pump upgrade and a tune and that'll pretty much optimize your stock turbo you can always get a custom tune to squeeze a little bit more power out of it especially if you don't have ethanol available and you want to run meth or something to help you get a little more octane in the car but for the most part it doesn't really make sense to get a custom tune unless you're really out to shoot some record or you're just...
hell-bent on staying with the stock turbo but like i said the stock turbo always kind of runs out of steam in the upper rpm so you'll get a lot more torque in the mid-range as you upgrade your fuel pump and run different fuels but the end power isn't going to change significantly now once you're pushing above stage 2 power you also need to upgrade your transmission if you have an automatic trans this is a good time to get the xhp transmission flash it will allow you to increase the amount of torque that the transmission can hold and it will also allow you to update your shift settings and basically optimize how the transmission works with your car so that will allow you to hold a lot more power without any issue now if you have a manual transmission like me it's a good time to upgrade your clutch the
upgradesare to go with the oem clutch from a 335is or 550i it's the same clutch that people used to upgrade in their e90s and it's pretty cheap and it works great and it drives just like stock it just holds a lot more torque now after that the next step is a bigger turbo upgrade and that can easily push the car over 600 horsepower many people are running over 600 horsepower on the stock engine without any issues just make sure you have the appropriate feeling
upgradesthat you need and a good custom tune and the car will run great now even with a big...
turbo upgrade the car tends to handle iats very well so you don't necessarily need an intercooler upgrade but above 650 horsepower so a lot of people tend to see cracks in their intake manifold from the additional boost pressure so it is
recommendedto upgrade your intake manifold above that point some people are getting away with it without any issues but it's kind of hit or miss whether the car will be able to handle it or not and if you crack your intake manifold it's just going to cause a big boost leak so you'll see a significant loss in power and just to keep everything running well and not risk damaging anything i would say that's a good time to start looking at intake manifold
upgradesalso for people that are pushing above like 650 foot-pounds it'll be time to build your transmission for the automatic transmission guys the default upgraded transmission is made by pure drivetrain solutions so hit them up get your trans upgraded and that will allow you to hold 650 plus torque reliably without an issue there are also some people that upgrade to the hp 70 trans which is a cheaper upgrade and it's basically pulling a trans from the diesel version of our cars it works and it does hold more torque but it is an older technology some people have experienced slower shifts there are also some challenges sometimes with getting xhp flash to work so it just kind of...
depends but for the people that are running it successfully they highly recommend it and enjoy it it really just depends on your budget and your needs so yeah those are the