[BuiltMyWay]

Has anyone stacked tunes?

I have racechip on the s58 engine, but I am a bit displeased at the result, even with mixing 20% e85 and 91 pump (that's all I can get). I really want to add to the performance, and possibly do a flash tune, either through OBD or a bench flash, which produces 25hp more, and add a downpipe. I'm not sure if the engine could handle it.

[emfo]

Originally Posted by suby01

I was in for a simple oil change. The shop foreman asked me about who I was tuned with. I said my car is stock besides my down pipe that's why I'm getting the check engine in the dash. He said I know your car has been tuned. BMW wants to know if it was a reputable tuner. I said yes. Its PTF. He said ok thats good. Gave a good day. So IDK. it was just a oil change lol.

Maybe he assumed someone that has downpipes likely has a tune?

Seems odd for an oil change

[MrItaly]

Originally Posted by GaryMiller

Has anyone stacked tunes?

I have racechip on the s58 engine, but I am a bit displeased at the result, even with mixing 20% e85 and 91 pump (that's all I can get). I really want to add to the performance, and possibly do a flash tune, either through OBD or a bench flash, which produces 25hp more, and add a downpipe. I'm not sure if the engine could handle it.

I'm no expert, but I wouldn't advise stacking tunes. If you want to upgrade to a flash tune, then your racechip is no longer needed. Ditch it, and let the flash unlock a lot more power as it is designed to do.

[FSociety]

Originally Posted by MrItaly

I'm no expert, but I wouldn't advise stacking tunes. If you want to upgrade to a flash tune, then your racechip is no longer needed. Ditch it, and let the flash unlock a lot more power as it is designed to do.

+1

[BuiltMyWay]

Thanks, I've been thinking of that as well. I have been doing a lot of digging around to learn about overall performance gains. Instead of ecu flashing, which would produce a slight more hp, with a downpipe, I am thinking of keeping the racechip and doing other mods like fuel pump to run higher ethanol, but there is not that many parts available for the s58 engine yet.
I think when the new m3/4 drop, a lot of parts would be available, but that could be from 6-9 months and if manufacturers are ready to drop parts right when the m3/4 are released.
One more question is if I do a downpipe, the check engine will turn on because I don't have an ecu tune, but would that have any negative affect on the engine itself? I heard the flash tune changes ratios to cope with the catless downpipes not just turns the light off?

Thanks

[BuiltMyWay]

Originally Posted by MrItaly

I'm no expert, but I wouldn't advise stacking tunes. If you want to upgrade to a flash tune, then your racechip is no longer needed. Ditch it, and let the flash unlock a lot more power as it is designed to do.

Originally Posted by suby01

I was in for a simple oil change. The shop foreman asked me about who I was tuned with. I said my car is stock besides my down pipe that's why I'm getting the check engine in the dash. He said I know your car has been tuned. BMW wants to know if it was a reputable tuner. I said yes. Its PTF. He said ok thats good. Gave a good day. So IDK. it was just a oil change lol.

suby01 when you drove 400+ miles with the downpipe and no tune, did you notice any negative affects? Does the tune just take the light off or does it changes ratios that adapt to the catless downpipe which then the light goes away?

I have a piggyback and want to add a dp so I want to know if its okay to do.

Thanks man

[suby01]

Originally Posted by GaryMiller

suby01 when you drove 400+ miles with the downpipe and no tune, did you notice any negative affects? Does the tune just take the light off or does it changes ratios that adapt to the catless downpipe which then the light goes away?

I have a piggyback and want to add a dp so I want to know if its okay to do.

Thanks man

No difference or negative driving feel with no tune and DP. The check engine is there in your face. But the car did not hesitate or act differently, besides being slow. 😆

[BuiltMyWay]

Originally Posted by suby01

No difference or negative driving feel with no tune and DP. The check engine is there in your face. But the car did not hesitate or act differently, besides being slow. 😆

Lol. how annoying was the light? is it worth it? I would be seeing that light for the next 3 years lol

[suby01]

Originally Posted by GaryMiller

Lol. how annoying was the light? is it worth it? I would be seeing that light for the next 3 years lol

The light is annoying. Just like it would be in any other car. But except it's still brand new ish. And 70k+ and not actually broken so it speaks to you each time you get in.
There are fixes.

[BuiltMyWay]

Originally Posted by suby01

The light is annoying. Just like it would be in any other car. But except it's still brand new ish. And 70k+ and not actually broken so it speaks to you each time you get in.
There are fixes.

lol. there are real fixes like spark plug defoulers or actual 02 sensor spacers. both do the same thing, just gives the 02 sensor some space from the catless dp and this eliminates the cel. I found this out after I asked how annoying is it lol.

[Daniely30]

Originally Posted by GaryMiller

lol. there are real fixes like spark plug defoulers or actual 02 sensor spacers. both do the same thing, just gives the 02 sensor some space from the catless dp and this eliminates the cel. I found this out after I asked how annoying is it lol.

The problem on s58 is that there is no room to put a spacer for o2. On b58 no problem, on s58 there is not even .1mm to spare

[sd306]

Just tune out the code with BM3...

[suby01]

Originally Posted by GaryMiller

lol. there are real fixes like spark plug defoulers or actual 02 sensor spacers. both do the same thing, just gives the 02 sensor some space from the catless dp and this eliminates the cel. I found this out after I asked how annoying is it lol.

Been there tried it. New BMWs are too smart for that. All a O2 spacer does on our cars is give you more time between the CEL showing up. As soon as you go WOT few times its back like your bestest friend in the world. Tried O2 spacers and Mini Cats too. And I am not running a catless CP, its still a 300 cel DP I believe and catted and there is no way to get rid of the CEL.
Only option is an actual tune.

[sd306]

You can also have the stock or competition map flashed with the code tuned out if you're worried about safety of the engine.

[AlexFL]

Originally Posted by sd306

You can also have the stock or competition map flashed with the code tuned out if you're worried about safety of the engine.

yes, i don’t understand what his issue is.