Broken engine: my piston melted

[Scharbag]

Sorry to hear about the engine. Hope that you will have an epic build when done.

Cheers,

[remi34000]

It's crazy, I never seem to have asked your opinion on melody burbles. talk to you about childishness but who is more? the one who criticizes the point of view of others or the one who does what he sees fit?

[remi34000]

thank you to all for giving me constructive answers. Can someone give me some information on stroker kit?

[drrust]

Originally Posted by remi34000

thank you to all for giving me constructive answers. Can someone give me some information on stroker kit?

If you are based in France as your profile indicates, looking at the regional forums to ask European members is recommended. In North America it seems that Steve Dinan's shop has extensive experience. Expect to spend at least $25k on a stroker. Recently a member replaced his engine with a non-stroked remanufactured unit from BMW, the cost was on the order of $15k.

I believe Dinan's current shop is CarBahn Autoworks.

[NeverL8]

Originally Posted by remi34000

It's crazy, I never seem to have asked your opinion on melody burbles. talk to you about childishness but who is more? the one who criticizes the point of view of others or the one who does what he sees fit?

You are posting on a public forum and get offended by the criticism of others.

[SYT_Shadow]

Originally Posted by pbonsalb

There are 3 things I would not have done. First, use a Gintani tune. Second, use a burble tune. Third, use an E85 tune (unless I had a flex fuel sensor and the tune could adjust based on that input).

Maybe none of those things are the problem or maybe one of them or two or more combined were the problem. It could also be something totally unrelated like a bad fuel injector.

Agreed

It may have been something unrelated, but sometimes when you push the limit so much the limit pushes back.

[dmlf]

Is the scoring on all cylinders ?

Looks like the the aftermath of a stuck open injector. Washed the cylinder walls, breaking the oil film which lead to scoring.

remi34000 si jamais tu souhaites revendre l'auto tu peux me contacter.

[Redd]

Originally Posted by dmlf

Is the scoring on all cylinders ?

Looks like the the aftermath of a stuck open injector. Washed the cylinder walls, breaking the oil film which lead to scoring.

remi34000 si jamais tu souhaites revendre l'auto tu peux me contacter.

Wouldn't a stuck open injector also have caused hydrolock and bent the conrod?

[Throatpunch]

Originally Posted by Redd

Wouldn't a stuck open injector also have caused hydrolock and bent the conrod?

An open injector can't throw enough fuel into tjecylinder fast enough within a full cycle to create by hydrolock

My theory is still a lean engine due to e85

U need to add 30% more fuel to make it operate in normal combustion a/f

[///M3Fresh]

Originally Posted by Throatpunch

An open injector can't throw enough fuel into tjecylinder fast enough within a full cycle to create by hydrolock

My theory is still a lean engine due to e85

U need to add 30% more fuel to make it operate in normal combustion a/f

OP said the tune is for E85. Unless he went to a station and got junk corn fuel without testing and no ethanol content sensor in line, its likely a mechanical fault, like an injector. I really cant imagine a tuner such as Gintani putting out a tune like that, even for E85 where it would detonate like that.

OP was it just this cylinder that has the damage or are others also melted/scored.

[nrubenstein]

Originally Posted by ///M3Fresh

OP said the tune is for E85. Unless he went to a station and got junk corn fuel without testing and no ethanol content sensor in line, its likely a mechanical fault, like an injector. I really cant imagine a tuner such as Gintani putting out a tune like that, even for E85 where it would detonate like that.

OP was it just this cylinder that has the damage or are others also melted/scored.

Gintani's web site makes no mention of a flex fuel sensor. To be fair to them, I'm not clear on how you would integrate one into the factory engine management.

[///M3Fresh]

Originally Posted by nrubenstein

Gintani's web site makes no mention of a flex fuel sensor. To be fair to them, I'm not clear on how you would integrate one into the factory engine management.

Gintani doesnt offer it. I am thinking you can run something along the lines of a powerflex commander. This would allow for 91/93 Oct tune and the kit will adjust fuel based on content levels.

Really the best way to do it is having the sensor in line and live content reader and switching between say 93/E50-65/E65-75/ ect

[Throatpunch]

Originally Posted by ///M3Fresh

Gintani doesnt offer it. I am thinking you can run something along the lines of a powerflex commander. This would allow for 91/93 Oct tune and the kit will adjust fuel based on content levels.

Really the best way to do it is having the sensor in line and live content reader and switching between say 93/E50-65/E65-75/ ect

Yeah but injectors need to be sized properly. I don't see any mention of larger injectors as the fuel injectors would need to spray much more fuel

Back.when I had my Evo I ran 880cc injectors and if I wanted to run e85 I needed 1000cc minimum

[admranger]

During the tear down, please take pictures of the main bearings. Fun to see them at different mileage when they didn't cause the engine to get destroyed.

[pbonsalb]

People run E85 through stock injectors and pump with AFD piggyback E85 conversion controller. They are adequate.

Adding an AFD Piggyback to an E85 tune round get you the flex fuel sensor. It would alter the injection pulse to match the fuel but the higher timing targets that are in an E85 tune would not change and that could be an issue. The concern with E85 is the inconsistency but if you always use one source or carry test kits you will know what you have.

[///M3Fresh]

Originally Posted by Throatpunch

Yeah but injectors need to be sized properly. I don't see any mention of larger injectors as the fuel injectors would need to spray much more fuel

Back.when I had my Evo I ran 880cc injectors and if I wanted to run e85 I needed 1000cc minimum

Yea I understand, the 25-30% more fueling that is needed to run proper A/F ratios on E85 is handled just fine by the stock injectors with plenty of room to spare. Boost is another beast.

[amrazM]

Originally Posted by tdott

Has it been running like that for 4 months?
I wouldn't have continued to run the tune of it was that bad and throwing combustion faults. I think you need to speak to your tuner. I'm not sure how the gas quality is in France but were you running the equivalent of 91/93 or whichever the tune was for?

aint no talking to your tuner, unless youre insta famous and have a stage X kit gintani will never get back to you.




burble tune, fuel washdown, scored cylinder walls in that order. buy a new engine and flash it with a stock tune then get a proper remap by dmp in france

[amrazM]

Originally Posted by ///M3Fresh

Yea I understand, the 25-30% more fueling that is needed to run proper A/F ratios on E85 is handled just fine by the stock injectors with plenty of room to spare. Boost is another beast.

since stock e9x injectors have "plenty of room to spare" show us a chart of IDC since youre confident about this.

people on this board, especially the new ones want to use a E85 map and chase the limits of what the S65 has to offer NA then add a flame tune into the mix, they'll be gone just as fast as they arrive. E85 with a tune for it literally pushes this engine to the outside limit of where this engine should be running.

[amrazM]

im guessing the photo from the boriscope is from cylinder 8, the bore is destroyed from the washdown of your flame tune

[///M3Fresh]

Originally Posted by amrazM

since stock e9x injectors have "plenty of room to spare" show us a chart of IDC since youre confident about this.

people on this board, especially the new ones want to use a E85 map and chase the limits of what the S65 has to offer NA then add a flame tune into the mix, they'll be gone just as fast as they arrive. E85 with a tune for it literally pushes this engine to the outside limit of where this engine should be running.

Stock fuel is variable no? so 3-6bar pending load... thats a peak of ~88PSI/injector. @100% duty.

If you want to make 560 (425RWHP + 10% room) Crank HP on E85(let me know if this is realistic as I dont know many S65s making this sort of power without boost/stroking. Just work the math backwards..

1/2lb of fuel is what you need per CHP per. So youll need 280lbs of fuel @ 100% duty cycle. 280/8 = 35Lbs. 3Bar ~43lbs injector.

Can do the math in stock form for you too. 414CHP = 207lbs of fuel. per injector that looks like 25-26lbs. add 30% for E85 and youre at ~34lbs.

[Redd]

The stock injectors can run E85 no problems. My friend tried E100 for a short period. Injectors also ran that fine but he melted the fuel pump.

[Longboarder]

Originally Posted by bvrider1

This is my opinion and you can take it as so.

A burble tune is a "Hey Look at me...bang, bang, flames, bang, flames, etc..."

It serves no purpose, there is no performance gains to the S65 engine.

This is a fad that needs to go away.

It's fake and superficial. Might as well hang out with the Kardashians...

Your burble tune introduces fuel into the system at a point where it is worthless.

You downloaded the worthless burble tune, you get a worthless result.

So there is no surprise here.

Good luck on finding a new motor and hopefully you learn that the burble tune is junk.

I hope you are right that it goes away. I had to get the M8 base model because the M8 competition has exhaust burbles with the valves open and i wanted to crash the car straight into a wall after 2 minutes on the test drive. Fortunately it could be turned off.

People who constantly accel and decel and subject us all to their Burbles and crackles are pure asshats.