What's your Black Friday car related shopping/wish list? If you have one.

[Picasso]

Originally Posted by skoold2003

This was well timed because I was just thinking yesterday that I might be taking a risk running my BM3 tune..

You can run it, but I wouldn't run anything higher than Stage 1 and I would ask specifically to limit torque under 650. Also, I would only do limited highway rolls with proper octane only and proper spark plugs and coils. Even that is risky IMHO. I tell that to people all the time, but people don't listen. Many people want to just tune and get more power.

[rja66]

Replacing my 2013 535xi with sapphire black CPO 2017 X5 35i. Options include: cold weather, DA and DA+, lighting package, luxury seating, premium package, dynamic handling, spare tire, leather dashboard, night vision w/pedestrian detection, B&O sound, and more. 12.6k miles. Picking it up on Black Friday!

[Hellrot]

New tires

[skoold2003]

Originally Posted by Hellrot

New tires

Costco has a pretty good deal. $150 off

[Jars914]

Originally Posted by Picasso

Here's what "forged" rods for s63tu look like (please see the pic attached). Can you count how many of them are bend?

s63tu and n63tu share some parts, including rods and pistons. So n63tu also has forged rods, but both n63tu and s63tu bend rods at about 700 torque. Forged rods doesn't mean they are strong, you need to have special design forged rods to push it really. If you compare stock forged rod for s63tu with some proper forged rod - picture is worth thousands words (2nd pic attached). Stock forged rods are weak. Getting a flash and pushing it to 700 on highway doesn't mean you will bend rods right away, but it will be a matter of when, not if.
All flashes for n63tu have high 600 torque numbers, even Stage 1. It doesn't matter BM3, ESS or else. At that torque numbers - any hiccup can be a last straw that will give your engine kaput. Very expensive one.
And don't think that knock sensor and implemented safety that dials ignition back when knock is sensed will save you 100%. it will not. At high rpm if God forbid something happens that failsafe won't be quick enough to save your rod, piston or cylinder.

If one wants to safely push power and experiment with tunes - you need either build engine (at the very least sleeves, forged rods, pistons) or consider different car altogether. x5 50i while powerful is NOT a reliable or strong engine to do this kind of things. If it's a mild tune and one keeps maintenance and requirements top notch (spark plugs, coils, fuel requirements etc) it should be fine for occasional usage. Otherwise it's a recipe for failure.

Just remember every time you do full throttle and torque numbers go up high with whatever tune/flash you have - you are on borrowed time and walking on razor edge. Yes, you might impress couple guys on highway, but is it worth it to get into major headache if something goes wrong? If you have extra $40k or willing to risk warranty battle with BMW NA - go ahead, but the field engineer who will come to inspect your failed engine and DMEs will find out the reason quickly. And yes, I'm aware what some tuners are saying that they developed miracle way to avoid detection. IMHO it's so far from truth and just a marketing trick to get more tune sales.
Bottom line is anyone doing it should be prepared for consequences.

AFAIK s63tu2 has finally beefed up rods. That's the engine that goes into F90 M5. That engine can push safely more than 700 torque, but not our engines unfortunately.

Do u think it's safer to tune the n55 engine over the n63?

[Picasso]

Originally Posted by Jars914

Do u think it's safer to tune the n55 engine over the n63?

Yes, I do. Main reason been n55 with stock turbos can't develop enough torque needed to bent rods. Safety margin is there.
Also, tunes for n55 are in general more mature, safer, it's a well known platform and tuners have accumulated a lot of knowledge (unlike with n63tu). Times when tunes used to run very lean on e85 on max boost are long gone. If I had to pick my tune for n55 I would go with Halim Cazimi, he really knows what he is doing.