Evo fail....
May 30, 2012, 12:37 PM
#63
When I saw the piston skirt and how bad it looked the first thing I thought of was the squirters. If it was an injector thing I'm sure it would have put a window in the block. Another thing I could think of is if this block had been rebuilt the pistons and the cylinder walls weren't machined correctly and not enough room for expansion. It is highly unlikely but I had that happen with a motor of mine. Sent it to a buddy to have it "worked on" and he ended up not doing things correctly and ended up ****in everything up.
May 30, 2012, 12:47 PM
#64
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If the car is not tuned right you can create problems with the mixture. The ECU has a "lean spool" feature that leans out the mixture to build boost faster. Basically it works by leaning out the mixture by about 1 point. Most tuners disable this feature because with out it, you get more accurate AFR measurements that match the tables in the fuel tables. If by chance it was left on, then your tune was going to fail sooner or later unless you tune that feature to current power levels. Otherwise the ecu will happily melt pistons as it leans the mixture to dangerous levels while at high boost.
May 30, 2012, 03:00 PM
#65
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If the car is not tuned right you can create problems with the mixture. The ECU has a "lean spool" feature that leans out the mixture to build boost faster. Basically it works by leaning out the mixture by about 1 point. Most tuners disable this feature because with out it, you get more accurate AFR measurements that match the tables in the fuel tables. If by chance it was left on, then your tune was going to fail sooner or later unless you tune that feature to current power levels. Otherwise the ecu will happily melt pistons as it leans the mixture to dangerous levels while at high boost.
I have Evoscan, but how do I check for "leanspool" and or whether its on or off?
May 30, 2012, 03:05 PM
#66
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When I saw the piston skirt and how bad it looked the first thing I thought of was the squirters. If it was an injector thing I'm sure it would have put a window in the block. Another thing I could think of is if this block had been rebuilt the pistons and the cylinder walls weren't machined correctly and not enough room for expansion. It is highly unlikely but I had that happen with a motor of mine. Sent it to a buddy to have it "worked on" and he ended up not doing things correctly and ended up ****in everything up.
Thats a good possibility, when taking the oil pan off I noticed that it had been off before due to all the scratched on the side from what looks like a screw driver prying it off. Funny that everything is stock however. Who knows. This block is no good for a 2.0ltr anymore but it can be bored out and rebuilt. I was happy to see that the crank was in perfect condition. The ticking noise I was hearing was coming from the piston pin. Damn thing barley pivots.
May 30, 2012, 03:21 PM
#67
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https://www.evolutionm.net/forums/ec...ean-spool.html
I would suggest that if you really want that 600whp monster on 91 crap gas, get familiar with ECU flash
The ECUFlash forum is a great place to learn about the capabilities that we enjoy on the ECU.
good luck!
May 30, 2012, 08:10 PM
#70
Thats a good possibility, when taking the oil pan off I noticed that it had been off before due to all the scratched on the side from what looks like a screw driver prying it off. Funny that everything is stock however. Who knows. This block is no good for a 2.0ltr anymore but it can be bored out and rebuilt. I was happy to see that the crank was in perfect condition. The ticking noise I was hearing was coming from the piston pin. Damn thing barley pivots.
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