[gpdriver17]

When my car was new, in the break in period, I took it out and did two 60-130 runs with around a 1000 DA. Got an 8.00 and an 8.13. Then I installed a JB4 and BMS intakes after the break in service. Did 2 1/4 mile runs on Map 2, got a 10.35 and a 10.27 with a 60-130 of 6.86. Now with a better DA by 1500 ft, on Map 0 (stock map), my 60-130 is 8.5x every time. Map 2 the best I can get is a 10.6 1/4 mile with 60-130 around 7.3. Better DA than the 10.3 and 10.2 runs. 60-130 times are all up about .5 of a second. I've tested this 20+ times over the last 2 weeks with good weather, they are consistently worse than before.

What should I have looked at? Turbo leak? Spark plugs? I ran a lot of boostane before getting meth injection last week.

[euro*]

Originally Posted by gpdriver17

When my car was new, in the break in period, I took it out and did two 60-130 runs with around a 1000 DA. Got an 8.00 and an 8.13. Then I installed a JB4 and BMS intakes after the break in service. Did 2 1/4 mile runs on Map 2, got a 10.35 and a 10.27 with a 60-130 of 6.86. Now with a better DA by 1500 ft, on Map 0 (stock map), my 60-130 is 8.5x every time. Map 2 the best I can get is a 10.6 1/4 mile with 60-130 around 7.3. Better DA than the 10.3 and 10.2 runs. 60-130 times are all up about .5 of a second. I've tested this 20+ times over the last 2 weeks with good weather, they are consistently worse than before.

What should I have looked at? Turbo leak? Spark plugs? I ran a lot of boostane before getting meth injection last week.

What's the km's on the car? To me sounds like I would be looking into spark plugs and checking out their condition.

Unless you are getting some error codes.

[gpdriver17]

3200km. I've heard boostane can mess up spark plugs though...

[northtorque]

There was some mention of slightly low coolant levels on the intercooler fluid circuits... low enough to reduce charge cooling efficacy but not low enough to trigger a low coolant warning. I can’t recall where I saw it but the person mentioned their car pulled stronger afterwards when fluid topped up. If any one else remembers that one please chime in.

[FloridaM5]

Do your logs speak to anything? If you're fueling is the same as before, and you are seeing issues, i would check plugs. Its unclear if you were having issues before wmi...if issues are post wmi, turn it off to see how you do.

Have you made any progress?

[gpdriver17]

Originally Posted by FloridaM5

Do your logs speak to anything? If you're fueling is the same as before, and you are seeing issues, i would check plugs. Its unclear if you were having issues before wmi...if issues are post wmi, turn it off to see how you do.

Have you made any progress?

Haven't made any progress yet. I'll check the spark plugs this weekend. Logs don't show anything. The issues started before WMI. I've tried turning it off/on. Numbers stay the same either way. I'm suspecting it's a buildup of boostane on the plugs. I was kind of hoping the WMI would clean anything off if that was the issue, but it hasn't seemed to make a difference.

[Qtr.M.Power]

Originally Posted by gpdriver17

Haven't made any progress yet. I'll check the spark plugs this weekend. Logs don't show anything. The issues started before WMI. I've tried turning it off/on. Numbers stay the same either way. I'm suspecting it's a buildup of boostane on the plugs. I was kind of hoping the WMI would clean anything off if that was the issue, but it hasn't seemed to make a difference.

Originally Posted by gpdriver17

Haven't made any progress yet. I'll check the spark plugs this weekend. Logs don't show anything. The issues started before WMI. I've tried turning it off/on. Numbers stay the same either way. I'm suspecting it's a buildup of boostane on the plugs. I was kind of hoping the WMI would clean anything off if that was the issue, but it hasn't seemed to make a difference.

Spark plugs 100%
If you are using wmi try to get 2 step colder and gap them somewhere between 20-22 (upon the boost)
I have the same issue here with my car and the only solution is to replace them every 3000KM .

[FloridaM5]

Originally Posted by Qtr.M.Power

Spark plugs 100%
If you are using wmi try to get 2 step colder and gap them somewhere between 20-22 (upon the boost)
I have the same issue here with my car and the only solution is to replace them every 3000KM .

Do you have part numbers for 1 and 2 step colder plugs? Thanks.

[BMWDriverX]

Originally Posted by FloridaM5

Do you have part numbers for 1 and 2 step colder plugs? Thanks.

https://burgertuning.com/products/ng...nt=42124774926

[FSociety]

Originally Posted by BMWDriverX

https://burgertuning.com/products/ng...nt=42124774926

Those don't work for F90, even for F10 they're hit or miss. Those spark plugs are good for non-V8

OP.. best is to inspect spark plugs and see its current gap , if they're too wide (some more than others) then probably a good time to install fresh ones.

F90 OEM --> https://bit.ly/2Qz6OVu

[BMWDriverX]

Originally Posted by FSociety

Those don't work for F90, even for F10 they're hit or miss. Those spark plugs are good for non-V8

OP.. best is to inspect spark plugs and see its current gap , if they're too wide (some more than others) then probably a good time to install fresh ones.

F90 OEM --> https://bit.ly/2Qz6OVu

I was running them in my F06 M6 for over a year, they specify they are for the S63TU motor and they come in packs of 8. Where do you get that they are not good for the F90?

[FSociety]

Originally Posted by BMWDriverX

I was running them in my F06 M6 for over a year, they specify they are for the S63TU motor and they come in packs of 8. Where do you get that they are not good for the F90?

Yep I've seen ppl running them but all depends how the car is pushed and how many miles before it starts misfiring. But in the case of F90 things differ a bit...

Those NGK 97506 are from the N20 engines (Models 220, 320, 420) because they run 17psi stock, also they tend to be cheaper to buy so its become popular to replace with.

The F90 spark plugs is also used in other cars such LCI 550, X5/X6 50i, 750 since 2017.

[gpdriver17]

Originally Posted by Qtr.M.Power

Spark plugs 100%
If you are using wmi try to get 2 step colder and gap them somewhere between 20-22 (upon the boost)
I have the same issue here with my car and the only solution is to replace them every 3000KM .

Wow, every 3000KM is nuts! Just ordered those plugs. Thanks.

[gpdriver17]

I thought I could check them out/change them myself. Nope. Way more involved than I thought! Got an estimate from an independent shop to do it, $490. This is going to be expensive if it has to be done every 3000km. Comes out to 25% of what I'm paying for the car...

[Bmwusabmw]

Originally Posted by gpdriver17

I thought I could check them out/change them myself. Nope. Way more involved than I thought! Got an estimate from an independent shop to do it, $490. This is going to be expensive if it has to be done every 3000km. Comes out to 25% of what I'm paying for the car...

These plugs and O2 sensors do not like Boostane or anything with high MMT, did you ever get a 12B011 code too? You wont need plugs every 3k as the plugs will last 20k+, but they wont last long if you are using or did use lots of boostane or any booster with lots of MMT. - change the plugs, if you are seeing 12B011 you might need O2 sensors too.

[FSociety]

3000km is crazy, must be something wrong then.

[gpdriver17]

Getting the plugs changed now. This is what the factory ones look like from boostane! They said the gaps were huge also. Will get some numbers later today or tomorrow morning to see if this was the fix.

[gpdriver17]

After the plug change I went back to map 0 to get a baseline run. Stock the car did 8.00 60-130's. It had been pulling 8.5+ since the boostane. First run, DA within 100ft of all the other runs, 8.01! It's back. Didn't have much room to do testing, but I also did a 1/4 mile run in Map 2 with a bad launch and did a 10.40. 10.27 was my best, but it was more of a downward slope, the launch was better, and the DA was 1000 ft less. So I think it's safe to say the car is back to running normal!

Also this performance drop happened after just one bottle of Boostane professional. So stay away from that garbage...

[FloridaM5]

Originally Posted by gpdriver17

After the plug change I went back to map 0 to get a baseline run. Stock the car did 8.00 60-130's. It had been pulling 8.5+ since the boostane. First run, DA within 100ft of all the other runs, 8.01! It's back. Didn't have much room to do testing, but I also did a 1/4 mile run in Map 2 with a bad launch and did a 10.40. 10.27 was my best, but it was more of a downward slope, the launch was better, and the DA was 1000 ft less. So I think it's safe to say the car is back to running normal!

Also this performance drop happened after just one bottle of Boostane professional. So stay away from that garbage...

Great news! Only one can, huh. I've run three...will def keep this in mind if I experience similar things.

[Uwish]

Does anyone know if we should change to a colder plug and different gap for a MS109 tune?

[JK-M5]

if its doing that to the plugs whats it going to look like in the rest of the Engine. id be getting a boroscope down whilst the plugs are out for a quick inspection. the bore should be smooth and pit free, top of the piston will guaranteed to be pitted which might increase compression depending on the build up.

[gpdriver17]

Originally Posted by Qtr.M.Power

Spark plugs 100%
If you are using wmi try to get 2 step colder and gap them somewhere between 20-22 (upon the boost)
I have the same issue here with my car and the only solution is to replace them every 3000KM .

When you change your plugs or have them changed, do you always let the engine cool down first? Someone on the whatsapp group just told me the engine in their F10 blew because they or a shop installed new plugs into a hot engine. Apparently it gets tighter on the plug when it cools down, the electrode snapped off and somehow their entire engine blew. The show definitely changed the plugs when the engine was hot...