Was This The Result Of Detonation?
Examining my head I noticed my #3 looks a little chewed up. I'm assuming this is the result of detonation? Thoughts?
http://boostedmiata.com/headwork/Coo...oute%20013.JPG http://boostedmiata.com/headwork/Coo...oute%20014.JPG |
Holy hell Scott. I'm starting to wonder if you have some sort of fetish involving continually having to rebuild your car.
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I take that as a yes? The rest look perfectly fine.
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Yeap, detonation city. Get out a strong magnifying glass and take a look at that area and others. Looks like little specs of aluminum in the carbon built up on the exhaust valves. Maybe you guys will start tuning a bit richer in boost like you should. :)
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Also get a file and some sand paper and smooth those edges out. Though unlikely, they could be the source of the problem.
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2 Attachment(s)
You were one step away from:
Attachment 207852 Attachment 207853 Been there done that...was n/a when that happened. |
this forum would have a lot less interesting pictures if it weren't for Braineack and his misadventures
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Originally Posted by Braineack
(Post 374606)
I take that as a yes? The rest look perfectly fine.
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nope, everything else looks fine, i just went back over it. Oh wellz.
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Yes detonation, it looks like my friends 350Z head, just much better, check your oil pan for fragments of metal as well as make sure u clean ur oil pump, change oil.
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Originally Posted by rogezeus2003
(Post 374906)
...check your oil pan for fragments of metal as well as make sure u clean ur oil pump, change oil.
I'm beginning to wonder if it wasn't some FOD from a part of this screw: http://boostedmiata.com/headwork/Coo...ute%20ZOMG.jpg or when my HG blew on #3 soon after I had put this head on last year. I was forced to drive 25 miles with the coolant temps constantly spiking above 220 and coolant leaking into #3... It's odd it's only in #3, no other cylinders show any damage, you can see similar pitting in #4 in that photo above, but I'm pretty sure that was from the screw dancing around. The injector I put on #3 and #4 flow more fuel than #1 and #2 as well. Good thing I'm doing a coolant reroute, I'll just richen my tune slightly and stay conservative with my timing. |
god damn I feel bad for you. I also feel great about my decision to pull 2* out of my spark table last night.
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Originally Posted by hustler
(Post 374954)
god damn I feel bad for you. I also feel great about my decision to pull 2* out of my spark table last night.
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Originally Posted by hustler
(Post 374954)
god damn I feel bad for you.
You honestly think I'll do anything besides take a 1 degree out and add a few points of fuel after it's back on???? If the block fails I have another and two spare heads... |
Originally Posted by DragonsMaw
(Post 374973)
You made the spark table of doom less doomy? Did something happen? I mean besides this thread.
Brain, what's wrong with fattening up and pulling 1*? Its the labor I sympathize over. I haven't' touched the mechanical bits of my car with a wrench since the install. |
Originally Posted by hustler
(Post 375005)
Brain, what's wrong with fattening up and pulling 1*? Its the labor I sympathize over. I haven't' touched the mechanical bits of my car with a wrench since the install.
Nothing wrong. I'm just saying, I had the head off for unrelated issues and noticed it. I'm going to smooth it down a little and slap it back on and forget all about it. |
I blame ur FMIC dude if you had a good WI setup ur shit would still be running right :D still bad luck indeed. Seems like the more we push em the more stuff we find in em to fix.
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Originally Posted by magnamx-5
(Post 375298)
I blame ur FMIC dude if you had a good WI setup ur shit would still be running right :D still bad luck indeed. Seems like the more we push em the more stuff we find in em to fix.
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^^^ holy crap. and i was gunna use your maps as a solid base map for my turbo install next week
I have now taken 1 degree of timing out from the whole map, maybe ill even do 2!! |
Originally Posted by 240_to_miata
(Post 375385)
^^^ holy crap. and i was gunna use your maps as a solid base map for my turbo install next week
I have now taken 1 degree of timing out from the whole map, maybe ill even do 2!! |
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