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Since i started flowing and testing injectors as part of my business this year i have seen and heard of at least 5 guys burning up pistons from leaning stuff out from low flowing injectors, every set i tested so far from these instances had 1 or 2 that flowed 20+% LOW, more common than you would think. Makes sense though, hp 500efis and 502 mpis are getting to be 15/16 years old, guys are running injectors that have NEVER been checked for 15+ years, its especially prevelant in stuff guys buy that hasn't ran in a couple years, a couple cans of seafoam is wishful thinking!
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So it's specific to 502 s. Do the after market blocks have the same issues ?
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1 Attachment(s)
If one quit completely it would be a different story, boat would have dead cylinder vs a critically lean cylinder still firing which destroys piston,bore and sometimes the block!
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Originally Posted by articfriends
(Post 4475621)
Since i started flowing and testing injectors as part of my business this year i have seen and heard of at least 5 guys burning up pistons from leaning stuff out from low flowing injectors, every set i tested so far from these instances had 1 or 2 that flowed 20+% LOW, more common than you would think. Makes sense though, hp 500efis and 502 mpis are getting to be 15/16 years old, guys are running injectors that have NEVER been checked for 15+ years, its especially prevelant in stuff guys buy that hasn't ran in a couple years, a couple cans of seafoam is wishful thinking!
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Originally Posted by tommymonza
(Post 4475623)
So it's specific to 502 s. Do the after market blocks have the same issues ?
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Originally Posted by articfriends
(Post 4475621)
Since i started flowing and testing injectors as part of my business this year i have seen and heard of at least 5 guys burning up pistons from leaning stuff out from low flowing injectors, every set i tested so far from these instances had 1 or 2 that flowed 20+% LOW, more common than you would think. Makes sense though, hp 500efis and 502 mpis are getting to be 15/16 years old, guys are running injectors that have NEVER been checked for 15+ years, its especially prevelant in stuff guys buy that hasn't ran in a couple years, a couple cans of seafoam is wishful thinking!
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Originally Posted by Black Baja
(Post 4475595)
I can get u a Dart Block for around $1800 and you don't have to drive to Ohio. They come out of Philly. Pm me if you need a hand.
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4 Attachment(s)
[ATTACH=CONFIG]559298[/ATTACH][ATTACH=CONFIG]559299[/ATTACH][ATTACH=CONFIG]559300[/ATTACH][ATTACH=CONFIG]559301[/ATTACH]
Both engines are fully rebuilt. I still need to get all the attachments installed back on them and get the headers pressure tested. But what a relieve to get this far. |
2 Attachment(s)
[ATTACH=CONFIG]559398[/ATTACH][ATTACH=CONFIG]559400[/ATTACH]
Well I'm getting there. Maybe they will be ready to put back in the boat tomorrow. |
wow! moving along fast!
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