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Discussion Starter #1 (Edited)
I figured i'd share some pics of my $8000+ mistake. It happened in 5th gear. low RPM and high load. The Boost gauge hit 35psi and the car went lean according to the wideband. Cylinder 3 let go and put a hole in the front and back of the block and bent both intake valves. Also created a small fire that melted the entire engine control wiring harness. I've tuned my own car successfully since 2015 because of all the great info on this forum. This came down to getting too aggressive with my tune and forgetting to set some failsafes. Check your tune everybody!
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Discussion Starter #3
Good Question. I was trying to figure out a lean issue at part throttle in 5th on the tollway. I had my WGDC rpm/mph crossover set wrong and forgot about it. It hit 35psi at half throttle. That was just one problem. Taking the car apart i found the turbo to 02 housing gasket leaking and missing a bolt. So I'm sure the AFRs readings were wrong as well.
 

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yikes!
 

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The dark side of owning and modding an Evo lol
Yea, this why I never opted to try and tune my own car. I don't trust myself lol. Time for you to rebuild and please get a bigger turbo.
 

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Discussion Starter #8
Yea, this why I never opted to try and tune my own car. I don't trust myself lol. Time for you to rebuild and please get a bigger turbo.
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For sure. My first move is to Darton sleeve a good used block, except they don't fucking exist...
 

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For sure. My first move is to Darton sleeve a good used block, except they don't fucking exist...
Hard to source a good used block these days?
 

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Discussion Starter #10
Hard to source a good used block these days?
Yes, if you do find one for sale it always seems to have a spun bearing. I don't want to deal with that nightmare on top of everything else lol
 

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Yes, if you do find one for sale it always seems to have a spun bearing. I don't want to deal with that nightmare on top of everything else lol
Spun bearings aren't an issue when you're rebuilding the whole block. Otherwise your other option is to buy a complete longblock.

Just have the mains shaved down maybe .005 to .010 and re-line bore the mains. If the crank needs undersized, then have it turned and re-nitrided if you want to use it.
 
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