Winter Repair - 418" Turbo Mustang - E85

Checked the shortblock again and I'm surprised I missed this.

This was #8 piston.
17ADD380-725E-4021-9618-28E9012BD4CA_zpsffpdzjcg.jpg


They are Probe 12360-030 pistons. Probe sells them individually for $100.

I'm gonna change the main and rod bearings while I'm at it.
 
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What did you miss? Pic is a bit blurry, dont see anything wrong... It seems more cost effective to buy an entire set @>$500 then $100 for just one..
 
SuperStang90 said:
What did you miss? Pic is a bit blurry, dont see anything wrong... It seems more cost effective to buy an entire set @>$500 then $100 for just one..
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Refresh the thread. The pic was wrong. Now it's correct and you will see the issue.

You are right, 500 for 8 is way better.....but it's a budget thing. $100 is less than $500.

Still not sure why 8 was so messed up. #8 injector flowed ok.
 
Holy shit, yeah I'd say so :lol: I understand budget, but the stress created on a 2618 alloy piston with as much power as you are making I would like the reassurance of all new slugs. Not to mention its recommended to replace a 2618 piston after so many passes. Maybe darko could get you an even better deal on a set... Just sayin..

What does the head look like? I would imagine with a chunk that big missing that the chamber is full of aluminum shards
 
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SuperStang90 said:
Holy shit, yeah I'd say so :lol: I understand budget, but the stress created on a 2618 alloy piston with as much power as you are making I would like the reassurance of all new slugs. Not to mention its recommended to replace a 2618 piston after so many passes. Maybe darko could get you an even better deal on a set... Just sayin..

What does the head look like? I would imagine with a chunk that big missing that the chamber is full of aluminum shards
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The cylinder head looks fine. No issues.

I'm gonna keep rolling with these pistons and roll the dice. Budget just won't allow for new pistons.
 
Got the piston ordered. Had to get weight so they could match.

I'm gonna reuse the rings. New bearings and gaskets arrived today.
9F7D6F74-0FE4-4B6F-BAD3-F27CDFF1581C_zpskm8xufk7.jpg
 
pulled the pistons and crank to replace mains and rod bearings.

Found this in hole #6.
17DD1667-0BD6-46B2-AC4E-DD5E88AE1C13_zpsjpzh7xin.jpg


So....I ordered another piston.

Got the mains in, and 6 of the good pistons/rods.
85C9BAE5-8411-4104-9DC5-CFD5AE8AE31F_zpsqudjthkj.jpg


Should have this completely wrapped up by next weekend.
 
Spoke to a buddy of mine out west (Josh Deeds of Deeds Performance) and he said my main reason for taking out the pistons was due to a burnt up IAT sensor.

I will check the sensor next week and confirm its burnt.
 
Looks like you are lifting the ring lands, are your rings file to fit? Open up the second ring gap bigger then the first...
 
SuperStang90 said:
Looks like you are lifting the ring lands, are your rings file to fit? Open up the second ring gap bigger then the first...
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The rings are file fitted. It was simply related to too much timing and probably the IAT sensor melted.

When it took out those plugs it also knocked off the ground strap. Its the tuners fault most likely.
 
SVTSINR said:
Between this and the yellowbullet thread I don't feel that confident in my decision to use Probe. How much timing were you running?
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I think those pistons are fine. Tim ran these pistons for 6 years and he's not using an intercooler and has very high ACTs. This shit is going to happen.
 
Fryguy302 said:
I think those pistons are fine. Tim ran these pistons for 6 years and he's not using an intercooler and has very high ACTs. This shit is going to happen.
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I forgot about the no intercooler but he's a way better tuner than me. I'll be running an intercooler, E85 and meth for TS so I might get a few passes out of it with my tuning. :roll:
 
SVTSINR said:
Between this and the yellowbullet thread I don't feel that confident in my decision to use Probe. How much timing were you running?
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That pass that hurt the pistons was 19 degrees. So factor in 300+ inlet temps and 10.5:1 compression and I guess I pushed it too hard. That pass it made 24.5PSI.

I got a little greedy. Probe makes a good piston.

My tuner buddy out in Cali said it was 100% related to the IAT sensor malfunctioning. I need to pull the IAT sensor and see if its burnt up. He said when they get melted that they throw off the tune. The top of the pass it was pulling 20% fuel.....but the target AF was still good. He explained that the FAST/BS3 has a glitch. He told me to pull the IAT sensor out of the intake and just run in the engine compartment and it should solve the issue.

I also plan to pull some timing back out of it.
 
I sure wish I could of got away with a set of off the shelf Probes. These damn Diamond pistons cost me an arm and a leg :lol: Have you considered running an intercooler? I was gonna try the no intercooler deal, but it scares me that I might melt down my $1200 set of pistons.
 
SuperStang90 said:
I sure wish I could of got away with a set of off the shelf Probes. These damn Diamond pistons cost me an arm and a leg :lol: Have you considered running an intercooler? I was gonna try the no intercooler deal, but it scares me that I might melt down my $1200 set of pistons.
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I'm just going to pull some timing. This combo has been rolling for years....I just got greedy
 
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