Read my post above yours.

To say it in easier terms, You can blow your engine with e85 BEFORE the stock knock sensor and ECU even register knock.

 

Exactly...which is why I asked to see his timing/AFR/boost curves. You don't tune for knock on E85, you tune for MBT.

At that torque level, going past MBT can easily throw a rod.

 

I understand the sarcasm but can we please keep all comments civil? Like I've said before and will continue to say, this happen more than likely as a result of me pushing things way beyond what I should have done. I'm not speculating one thing or another as opposed to simply letting you all know what happened in the event that it could prevent future things similar from happening. In the EVO world, some stories are good and others aren't so good. Thanks.

I plan to have the engine pulled in the very near future to get the diagnosis started so that I can prevent this from even happening in the future.

I bought a narrow band AFR gauge by mistake and was recommended that it wouldn't be beneficial at all for an EVO. For the engine rebuilt, timing is the main factor but those details are being worked as well. Yes, I'm still making payments on the Mamba but in no way am I selling her as she is worth more than a few dollars (those of you that know me understand why).

No. I am not selling the Mamba. It's not like you can afford her anyway.

I do not have a knock sensor which is something that I'll definately invest in down the road. Yes, I'm running the Tephra map-switching feature.

 

What the other guy was referring to was your stock knock sensor. With the Tephra mod, when the knock sensor detects knock it will flash your SES light.

 

why you would not have a knock sensor? our cars come with a knock sensor from the factory. lol. hope you get things sorted out. i havent had a problem with evod for over 3-4 yrs

 

Tuners will generally make the tune as agressive as you want them. As for mine he told me when I had knock and we backed it off until there wasn't any and he felt safe. There is a pretty big issue here and it's that if you are in 5th gear at WOT the car does not and can not control boost as if it was 2nd, 3rd, 4th gear. My car is tuned for spike of 32 PSI and in 5th gear at higher RPM's at WOT I've recorded a spike to 37 PSI but thanks to the knock sensor nothing was hurt. Depending on how your tune was set up and the temperature it's pretty obvious things got pushed past their limits. In colder weather the air is denser and you are going to push more boost. I wouldn't be surprised if you hit 35-36 PSI and without the knock sensor to control it this is what can happen. Every car is different, every tuner is different but I would stand behind Kevin 100%. If he does the rebuild he can let you know what happened. It sucks, no doubt, hopefully you're back up and running sooner than later

 

Ouch.. I feel for you man.

What is Mamba? Also, what is MBT?

 

Hey man i am right there with you. I got a J-tune on e85 on my evo at about 70kmiles stock motor. I was on 23lbs and i wld make 30psi meth evos look slow. I was trapping 117-120 range on 23psi falling to 30. So at 91k miles i go back and have a re-tune. I wanted 30psi so i cld race this friend of mines c6 z06. Well i get it tuned on 30psi and 1st gear tires no good, 2nd gear tires still no good, 3rd gear-hold on tight. **** was crazy. Long story short a week later i was going up a hill and gave it too much load, prob doing 40 in 5th gear. All of a sudden, boom.. Piston 1 had completly fatigued and decided to give up. It completly shattered cause me to throw a rod and put 2 holes in block. No sign of detonation. Tune was dead on. I was astonished how much beating my stock motor went through. Dnt worry when it is built with a bigger turbo, u will look back and laught at the fact. Wish the best of luck.

 

also it is best to get it tuned at a higher gear if you will push it hard at 5th since you will hit different loads in different gears.

 

so are we to assume kevin tuned him at a lower gear and he decided to push it hard in 5 and because of the spiking boost created lots of knock and that in turned doomed the motor???

 

Mamba is what he call his car i believe.

MBT timing = Maximum Brake Torque timing

 

No, "we" can assume what me and l2r99gst are saying, that possibly the timing was past MBT, though.

Or could have been that 394TQ was just the limit for this specific stock block. The stock block limit is about 400-420TQ, which this car was very close to.

 

its hard to say without having a log when it happened. kevin has done a lot of e85 tunes so i believe he is knows what he is doing. you will also have to consider where he is getting his e85 from. maybe the blend was bad. to the op keep us updated on what you find when you open up the motor. also posting your timing maps would help the people here see if you were past MBT.

 

dude im just saying i been tuned on a high amount of boost more than yngevo like i said 27-28 psi and we both been running our cars hard on the streets cause people are just to impressed by the stock turbo.. your car should have been able to take that beating...

 

Where is Kevin anyway? He would have all the data himself.