[turnsignalslol]

I've been wondering, what makes the s58 so much better than the s55 in terms of power making potential and reliability? how is a downpipe and a tune all you need to make 700+ whp on the G8X platform? plus no need to buy a crankhub upgrade to support all of that power.

[MIM5]

Originally Posted by turnsignalslol

I've been wondering, what makes the s58 so much better than the s55 in terms of power making potential and reliability? how is a downpipe and a tune all you need to make 700+ whp on the G8X platform? plus no need to buy a crankhub upgrade to support all of that power.

One piece crank hub on s58 compared to 2 piece on s55. S58 was built with lower compression to handle more boost and also starts off with bigger turbos. Also fuel system is better to support more fuel for the 700+ whp.

[ChrisM4]

The S58 is a little bit like the 2JZ of the BMW world. It’s going to be a classic engine for making big power.

[forcefed]

The s58 has bigger turbo's, lower compression so it can run higher boost, more fuel flow capability, add those things together with Xdrive and some ethanol and you got a 9 second car.

[brad65ford]

BMW nailed it with the s58.

[turnsignalslol]

Originally Posted by brad65ford

BMW nailed it with the s58.

A G8X car is something I definitely want in the future. But I haven't had my M2C for very long and am still waiting for my warranty to expire so that I can have my fun. We'll see how much I still want a S58 once I get to tune my S55 (and yes, I will be doing crankhub before doing any power mods)

[Forzanerazzurri]

What a beast

[Gottagofast]

S58 is derived from B58. The compression ratio was dropped from 11:1 to 9.3:1, making S58 a big old boosty boost boy.

Plus you get forged steel con rods, forged aluminum pistons and a forged chrome molybdenum heat treated steel crankshaft as well as plasma coated cylinder walls. The internals are STRONG. Classic overengineered German machine.

[G MONEY]

Originally Posted by Gottagofast

S58 is derived from B58. The compression ratio was dropped from 11:1 to 9.3:1, making S58 a big old boosty boost boy.

Plus you get forged steel con rods, forged aluminum pistons and a forged chrome molybdenum heat treated steel crankshaft as well as plasma coated cylinder walls. The internals are STRONG. Classic overengineered German machine.

Like that over engineered Crank hub? Lol. Sorry, but these M cars have had motor issues for a long time. If this one stays solid, it will be about fucking time.

[GT_Juls]

Originally Posted by G MONEY

Like that over engineered Crank hub? Lol. Sorry, but these M cars have had motor issues for a long time. If this one stays solid, it will be about fucking time.

To be fair //M motors have very predictable maintenance/ upgrades needed to be bullet proof. S58 seems to be the perfect motor finally.

[G MONEY]

Originally Posted by Gseries92

To be fair //M motors have very predictable maintenance/ upgrades needed to be bullet proof. S58 seems to be the perfect motor finally.

Let’s hope so!!

[BzsBimmer]

There’s a few tuned S58’s that have grenaded their motors top end but they are tuned to be fair and anything goes at that point. Maybe a Motiv issue according to one poster.

I’m also hoping for a robust platform that can be tuned to reasonable levels outside of the typical rod bearing, crankhub, and VANOS issues.

[Steveo]

XDrive!

[destoyan]

While most of the guys talking about the positiv stuff, I will say few words about the weak points:
- Rods
- Rod- and mainbearings
- Clutch

If those things could have handled little bit more ... the car would have been really a beast of a beast.

[Sbm007]

Originally Posted by destoyan

While most of the guys talking about the positiv stuff, I will say few words about the weak points:
- Rods
- Rod- and mainbearings
- Clutch

If those things could have handled little bit more ... the car would have been really a beast of a beast.

Interesting, have you had any issues with the above points on your car?

Also, what sort of power is your car running now that you are running into these issues?

[DFW_M]

Originally Posted by turnsignalslol

I've been wondering, what makes the s58 so much better than the s55 in terms of power making potential and reliability? how is a downpipe and a tune all you need to make 700+ whp on the G8X platform? plus no need to buy a crankhub upgrade to support all of that power.

The S55 was a great engine. I do miss its wild nature.
The S58 is way more mature and capable though

[destoyan]

Originally Posted by Sbm007

Interesting, have you had any issues with the above points on your car?

Also, what sort of power is your car running now that you are running into these issues?

About the rods: I know few guys with blown engine because they pushed too much. Basically even with maxed stock turbos, you can bend rod and with hybrids (if torque is not in check, you def. blow engine).

About the bearings: I personally experienced it and saw how they look. I am building my engine and gearbox currently. At 9000 km (5600 mi) my main and rod bearings were already in bad shape. I know lots of other S58 opened engines with very little milage and they all had same issues. I assume it is the OEM oil and the Bearings materials.

About the clutch: A friend was running 25k km (15.5k mi) on stage 2 and he gave his gearbox for upgrade. Clutch was done. So basically above 900 nm (660-700 ft lbs) you will roast the clutch at some point.

For me:
1. Change frequently oil (3000 mi) and I think it is better to switch to different oil (not OEM).
2. Torque must be limited 650-700 ft lbs (if one plan to drive the car for a long term)
3. If one plans to go hybrids or frame - just do engine and gearbox (not worth the risk).

[SE7EN335]

Originally Posted by destoyan

About the rods: I know few guys with blown engine because they pushed too much. Basically even with maxed stock turbos, you can bend rod and with hybrids (if torque is not in check, you def. blow engine).

About the bearings: I personally experienced it and saw how they look. I am building my engine and gearbox currently. At 9000 km (5600 mi) my main and rod bearings were already in bad shape. I know lots of other S58 opened engines with very little milage and they all had same issues. I assume it is the OEM oil and the Bearings materials.

About the clutch: A friend was running 25k km (15.5k mi) on stage 2 and he gave his gearbox for upgrade. Clutch was done. So basically above 900 nm (660-700 ft lbs) you will roast the clutch at some point.

For me:
1. Change frequently oil (3000 mi) and I think it is better to switch to different oil (not OEM).
2. Torque must be limited 650-700 ft lbs (if one plan to drive the car for a long term)
3. If one plans to go hybrids or frame - just do engine and gearbox (not worth the risk).

I'm surprised the bearings still are an issue carrying over from the s55. Must be the OEM oil and/or bearing materials. I think switching to a high zinc oil 5w40 grade may help with the bearing issues.

[somer]

Originally Posted by destoyan

About the rods: I know few guys with blown engine because they pushed too much. Basically even with maxed stock turbos, you can bend rod and with hybrids (if torque is not in check, you def. blow engine).

About the bearings: I personally experienced it and saw how they look. I am building my engine and gearbox currently. At 9000 km (5600 mi) my main and rod bearings were already in bad shape. I know lots of other S58 opened engines with very little milage and they all had same issues. I assume it is the OEM oil and the Bearings materials.

About the clutch: A friend was running 25k km (15.5k mi) on stage 2 and he gave his gearbox for upgrade. Clutch was done. So basically above 900 nm (660-700 ft lbs) you will roast the clutch at some point.

For me:
1. Change frequently oil (3000 mi) and I think it is better to switch to different oil (not OEM).
2. Torque must be limited 650-700 ft lbs (if one plan to drive the car for a long term)
3. If one plans to go hybrids or frame - just do engine and gearbox (not worth the risk).

Which oil will you be going with on the rebuilt engine? Also what weight? Thicker i assume?

[destoyan]

Originally Posted by SE7EN335

I'm surprised the bearings still are an issue carrying over from the s55. Must be the OEM oil and/or bearing materials. I think switching to a high zinc oil 5w40 grade may help with the bearing issues.

I am switching to 5w40
I know lots of guys running 5w40 and even thicker oil.

It is stupid that B58 has zero issues with bearings and S58 sux

[destoyan]

Originally Posted by somer

Which oil will you be going with on the rebuilt engine? Also what weight? Thicker i assume?

5w40 - Röwe Racing (but Make plays no role … redline, lm, ravenol, motul … all good)

[BzsBimmer]

Originally Posted by SE7EN335

I'm surprised the bearings still are an issue carrying over from the s55. Must be the OEM oil and/or bearing materials. I think switching to a high zinc oil 5w40 grade may help with the bearing issues.

This will definitely be something to watch for as the years go by. BMW should have learned lessons from the prior rod bearing issues of the past. The S55 didn’t have widespread issues although a few may have happened, just not widely broadcast.