The Truth Behind The Subaru EJ-Series Engines -

[16 cycles]

You are now going to blow a motor at or under 7psi even on shitty gas with an ignition advance multiplier at 16 7 psi is baby load values....turbo is barely spinning and the pistons+rods are not seeing anything near the forces they see at 25psi (in regards to 16cycles point)

show me where i said "blow a motor"?

[R. Mutt]

What about "bad" gas?

well I'm a victim of it...the IAM was on 16

Aaron's motor blew (shitty but it happens). He believes the cause to be bad gas and aggressive tune (reasonable claim but based on what he says doesn't make sense)

Wouldn't running Meth nullify any problems with octane? Regardless of tune?

Banzai Questions claim of bad gas being culprit. This makes sense because not only is he running water/meth injection which effectively raises the octane and cools the mixture but since Aaron said the ignition advance multiplier was 16 it proves the failure was not due to knock. Since octane is a measure of knock resistance it can be established that in whatever capacity the meth was operating irrespective of the quality of the gasoline - it was sufficient for the tune. IE it doesn't matter what the trigger point was...it had nothing to do with the engine failure.

^ depends on your trigger for the meth to start spraying...

At this point you say that meth and therefore the octane could be a culprit depending on the trigger.






You didn't say it verbatim...but you said it

[R. Mutt]

You could argue that your statement was meant just in context to Banzai's question and not Aaron's engine failure. Even so I wouldn't agree with your point. The average meth kit triggers off of boost, tps or idc. You don't need meth in low load situations because the knock resistance of gasoline is sufficient. You spray when you start increasing load...and usually the ecu has that point that is transitions from closed to open loop and load is one of the main determinants of this change over.

[Aaron 2NR]

What about "bad" gas?

well I'm a victim of it...the IAM was on 16

Aaron's motor blew (shitty but it happens). He believes the cause to be bad gas and aggressive tune (reasonable claim but based on what he says doesn't make sense)

Wouldn't running Meth nullify any problems with octane? Regardless of tune?

Banzai Questions claim of bad gas being culprit. This makes sense because not only is he running water/meth injection which effectively raises the octane and cools the mixture but since Aaron said the ignition advance multiplier was 16 it proves the failure was not due to knock. Since octane is a measure of knock resistance it can be established that in whatever capacity the meth was operating irrespective of the quality of the gasoline - it was sufficient for the tune. IE it doesn't matter what the trigger point was...it had nothing to do with the engine failure.

^ depends on your trigger for the meth to start spraying...

At this point you say that meth and therefore the octane could be a culprit depending on the trigger.






You didn't say it verbatim...but you said it

As I stated numerous times on this forum and others, I don't know everything about tuning, auto mechanics etc but I learn as I go along.
This was the conclusion based on the events of the day, maybe we are wrong but I will post pics when the engine is scrapped.

After my tuner pulled a live view I filled gas later that night and parked the car up until Sunday. Again in a gas station I never filled at before.

My mech said based on his tests the car began to detonate and the main variable in this is fuel, since injector duty cycle etc remained the same from what they saw....


Maybe we are wrong but the explaining made sense to me but I'm not a mechanic or a tuner...

[R. Mutt]

No one knows everything about tuning or tech work. I for one am no mechanic or tuner - just an enthusiast. We're all here to learn not so? I'm just giving my $0.02 as we're on a forum after all.

I agree with you that the tune was likely too aggressive (torque wise...too much too soon is a rod killer with the 4G63 can't speak for the EJ series). I just disagree with your mechanic about the gas.

My mech said based on his tests the car began to detonate and the main variable in this is fuel

Did he say what tests he performed in order to determine this?

[Lance]

There are so many potential causal mechanism at work at any given time it becomes very difficult to control for it all.

The most we can do is try to piece together the evidence to come up with some logical explanation for why things happened the way it did. At the end of it you might have multiple but very plausible scenarios. Even when you pull the engine it would be difficult to tell exactly what caused what.

[R. Mutt]

I agree with you. You'd need logs to go with a tear down.

[Lance]

I agree with you. You'd need logs to go with a tear down.

We have a tuning thread going on over at the Subaru forum. You should check it out.

[R. Mutt]

That's like inviting the fox into the hen-house.

[Aaron 2NR]

http://www.vikingspeedshop.com/how-to-a ... rx-or-sti/

nice article

[BLUE_CP9A]

What was the outcome of the tear down?

[Aaron 2NR]

Injectors leaned engine and melt a piston, cracked another

[BLUE_CP9A]

Shame about that! At least you got to the bottom of it.

[Ted_v2]

Ougooudd

[Aaron 2NR]

cracked number 2



melt number 4

[Mercenary]

engine soft

[Aaron 2NR]

Kingston 12s camp
stock internals
Nice Subaru. EJ20, Hydra EMS, GT3076@30psi, C16, FMIC

[Lance]

TMIC?

[16 cycles]

moar pics of that Kingston 12 scooby pls ??