Quote:
Originally Posted by worry
hey everyone, in the near future i'll be purchasing an LCI m240i and i just wanted to further understand some of the limits that the stock block and zf transmission can comfortably hold.
i plan on enjoying the car stock for a while but i definitely want to have the car to hold its own in a roll race for the summer
the intention is to build a very capable daily driver while giving myself enough headroom so that the car doesn't explode on me. from what i've garnered the "sweet spot" with this power train is at around 550-600 whp before needing to build the block and trans. that being said i'm less concerned about the block than the trans, will an xhp stage 3 tune be enough for these kind of power limits? i don't intend on taking to the car to the dragstrip or launching often if barely at all.
as for the components themselves id assume they looking something like this
xhp stage 3
catless downpipe
tu or better hpfp
pure 800 turbo / docrace turbo kit (0 clue as to which turbo would suffice)
i have access to e85, it's a bit far but i wouldn't have an issue driving to the station / buying a 55gal drum of e98 and mixing it myself.
i don't necessarily want to cheap out but i also don't want to go overboard with headroom to eek out more power out of the stock block/trans
appreciate any help given and i'm excited to join the platform soon  |
You might have better luck getting answers to your questions in this section of the forum:
https://www.2addicts.com/forums/forumdisplay.php?f=664
Also, there are some B58 enthusiast groups on Facebook. There are lots of people on there that are more into higher HP applications, upgraded turbo, and things like that.
In my opinion you should be fine on stock internals and trans at the 550 to 600 HP levels but of course the stock turbo won't get you there so glad you are planning on replacement. The XHP stage 3 tune should work very well with what you are trying to do, and you can set torque limits by gear and the ranges are pretty vast. This will be especially important if you have a RWD version of the car.
From your mods list I don't see the plan for engine tuning, what is the thought for that? MHD has worked great for me. Also, I recommend going with a a stage 2 HPFP (Dortch is a common one) vs the TU; that will allow more rail pressure and will be less limiting from an ethanal usage perspective.