[Menacef90comp]

Originally Posted by MuffinFlavored

The tuning scene here seems kind of dead. Looking to get into an F90, curious if tuning it is just going to make the engine a ticking time bomb.

Yes it is unless you get a real tune if you get a jb4 it’s very unreliable not that jb4 is a bad product,it’s just an awful product to put on any car over 60k not worth it visit a tuner tune it get it on a dump and use the car how the tuner says it will function good

[hotbrick]

Originally Posted by Menacef90comp

Yes it is unless you get a real tune if you get a jb4 it’s very unreliable not that jb4 is a bad product,it’s just an awful product to put on any car over 60k not worth it visit a tuner tune it get it on a dump and use the car how the tuner says it will function good

As there are currently no tunes available for post LCI, I was researching the JB4 for this platform and came across your post, and am trying to understand your thoughts a little better.

From what I gather you're saying that the JB4 is unreliable, but at the same time the JB4 is not a bad product, unless the price point of the car is over $60K, then it becomes a bad product?

Please help me understand.

[GTATX]

Bottom line is even stock engine can blow. Lot to do with maintenance, fuel and driving habits, condition etc …..

I have a very aggressive stage 2 for over a year but I'm very careful with supporting mods, maintenance and fuel. I also have launched the car quiet a few times to chase dragy numbers but I have considered the right time and weather to do it. Also I don't push the car every time I sit in it. It's only pushed occasionally. In short be respectful to the car and hope for the best as rest is not in anyone hands as even stock engines can blow but with tune probability is higher.

[e92hunter]

Originally Posted by bpma

I'm currently driving a replacement engine (slight tune to Stage 1 / 700hp), the old motor is being built. Once it's done, I'll try to get it to 1000hp. Not sure how long that will last, but since I already have a second engine if things go south, I don't have many excuses.

Also apparently MY20 engines are more durable - one of the changes is that the cylinder liners are made from cast iron.

Regarding the improved cylinder liners for MY20, do you have any kind of proof or where did you get the information from?

[mlainfiesta]

What does " suuporting mods" entail?

[GTATX]

Originally Posted by mlainfiesta

What does " suuporting mods" entail?

Catless or high flo Downpipes, proper and routinely changed engine oil, correct gas for correct tune, limiting the torque and hp vs ridiculous levels.

[brad65ford]

Coming from the rs3/ttrs community, you guys don't know about soft rods, stage 2 can easily destroy a motor if the torque is to height. Now that I have a f90 m5 was hopeful there would be more discussion on tuning options. I doubt these motors are that weak. Assuming stage 2 on only E85 full tilt would push these motors harder than they want to be. Thinking stage 2 tune for 93 octane with a kick of a few gallons of E85 just so there is no knock should keep these motors together. Was going to go BM3 after using it on my M2c, was so easy especially adjusting over run which I want to do on my 19 M5c. Still undecided which direction to go. The results of JB4 are impressive, but what stops me the most is the codes and issues that come up not even blowing the motor. Wishing there was just a tread with guys that have tuned M5's that can share more results.

[edwarjejeega]

Originally Posted by brad65ford

Coming from the rs3/ttrs community, you guys don't know about soft rods, stage 2 can easily destroy a motor if the torque is to height. Now that I have a f90 m5 was hopeful there would be more discussion on tuning options. I doubt these motors are that weak. Assuming stage 2 on only E85 full tilt would push these motors harder than they want to be. Thinking stage 2 tune for 93 octane with a kick of a few gallons of E85 just so there is no knock should keep these motors together. Was going to go BM3 after using it on my M2c, was so easy especially adjusting over run which I want to do on my 19 M5c. Still undecided which direction to go. The results of JB4 are impressive, but what stops me the most is the codes and issues that come up not even blowing the motor. Wishing there was just a tread with guys that have tuned M5's that can share more results.

Bradford,

1.) Congrats on the M5, Hope you enjoy it! It's really an amazing car all around.

2.) You will only ever see bad forums about a cars motor rather than good, because if you're having no issues what's there to post about, right?

Beyond that point though, you tend to see a lot of forums on the F90 page as opposed to other cars likes Porsche's/Vette's/Mustang's and even other BMW's (S55, B58 etc), about how they blew their engine. This is a common thing, and I don't want to scare you at all but stage 2 with e30 is definitely not "safe". I mean if your tuner wants to limit torque and do a few other things, and you don't drive like a maniac everyday flooring it in first and second gear all the time, you SHOULD be fine.

BUT, out of personal owners I know in my area that are tuned (stage 2/stage 2+), they'll be the first to tell you that it tends to become a headache dealing with these cars.

Not every car is the same though. My buddy has been 720+ whp for over a year now, with minor maintenance whereas others will just do stage 1 and blow their motor. Again, this depends on how you drive and sometimes even luck.

EDIT: Just re-read and saw your statement about limiting torque.

[pbonsalb]

The Mercedes seem to be able to handle way more torque with the stock block. Maybe the E63 is the way to go for more serious power.

[brad65ford]

Originally Posted by edwarjejeega

Bradford,

1.) Congrats on the M5, Hope you enjoy it! It's really an amazing car all around.

2.) You will only ever see bad forums about a cars motor rather than good, because if you're having no issues what's there to post about, right?

Beyond that point though, you tend to see a lot of forums on the F90 page as opposed to other cars likes Porsche's/Vette's/Mustang's and even other BMW's (S55, B58 etc), about how they blew their engine. This is a common thing, and I don't want to scare you at all but stage 2 with e30 is definitely not "safe". I mean if your tuner wants to limit torque and do a few other things, and you don't drive like a maniac everyday flooring it in first and second gear all the time, you SHOULD be fine.

BUT, out of personal owners I know in my area that are tuned (stage 2/stage 2+), they'll be the first to tell you that it tends to become a headache dealing with these cars.

Not every car is the same though. My buddy has been 720+ whp for over a year now, with minor maintenance whereas others will just do stage 1 and blow their motor. Again, this depends on how you drive and sometimes even luck.

EDIT: Just re-read and saw your statement about limiting torque.

Appreciate the kind words and thoughts which I agree as well. Seems to be across the board with all these engines these days. The stock turbos can make more torque then the stock rods.

[19M5]

Hmmmm….you guys gave me a crazy idea. What’s the name of that shop in CA (in Gardena?) that does or can do F90 engine builds?

[pbonsalb]

Carbahn in CA builds S63TU.

[19M5]

Originally Posted by pbonsalb

Carbahn in CA builds S63TU.

Thanks! But isn’t there also such a builder in In so-cal? I could have sworn I read or learned of one from this forum.

[santox]

I think guys we should appreciate more this engine . This car pulls like a stage 1 E63s and stage 2 RS6 . The car is allready stage 1 by default with the stock performance .

[brad65ford]

Originally Posted by santox

I think guys we should appreciate more this engine . This car pulls like a stage 1 E63s and stage 2 RS6 . The car is allready stage 1 by default with the stock performance .

Agree, just removing weight might be another option for moving quicker. Well its actually even easier on the motor having less weight lol.

[pbonsalb]

The M5CS is at a good weight. I’d spec it with the comfortable seats, which would add back 50+ lbs.

[AmooManiak]

Originally Posted by pbonsalb

Carbahn in CA builds S63TU.

Would not trust my car with Carbahn. They couldn't even answer simple questions when it came to tuning, which BM3 could. I could only imagine how they "build" S63s...

[pbonsalb]

Interesting. They have been building motors for years and have a good reputation. You can find negative stuff about any shop — Ghassan, Bimmer Performance Center, RK Tuning, etc. Hopefully there will be good choices by the time I build, if I build. Maybe ask IND who it recommends.

[AngryInch]

So how wide spread is this bent rods situation? I just did a few hours of google searching and reading, quite a few threads come up, but at the same time, there is also a lot of guys running low 10s in this car...

Im coming from a Weistec Stg 3 blower car that went 65,000km under 10psi on a NA engine and never missed a beat. I feel the AMG engines are built a bit stronger from the factory.

[brad65ford]

Originally Posted by AngryInch

So how wide spread is this bent rods situation? I just did a few hours of google searching and reading, quite a few threads come up, but at the same time, there is also a lot of guys running low 10s in this car...

Im coming from a Weistec Stg 3 blower car that went 65,000km under 10psi on a NA engine and never missed a beat. I feel the AMG engines are built a bit stronger from the factory.

I wish there was more data as well, though its going to be difficult. Would suggest having the best oil / change often and not over heating (repeat runs) to keep the bearings well kept. But in the end its all about torque it seems that hurt stock rods. Eventually someone will post details of the difference if any between the F10 and f90 motors. One things for sure the motor builders aren't sharing much which is common these days. Looks like RK autowerkz has a full line of motor builds for them. Personally I'd like to be stage 2 on ethanol bend or full E85 and call it a day, not sure how long a motor would last at that power level. But I sure wouldn't put ungraded turbo on these heavy girls with out ungraded rods/pistons.

[AngryInch]

Nevermind upgraded turbos, seen lots of threads with stock turbos....

[DrivenAgain]

"Earlier" cars are "softer" seem to be less problems post 2020