Machined block, ok or not?
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Re: Machined block, ok or not?
Thanks All again, you have been very helpful as we are now more confident.
My customer knows this thread and he is ready to pay for another block if mandatory, as this engine will see some race abuse.
Adding other info about it, the upper signs are over the first ring so no problems at all, but the lower three, the ones you can feel it with nail, are between first and second ring.
So they will never stop rusting?
Better photo:
My customer knows this thread and he is ready to pay for another block if mandatory, as this engine will see some race abuse.
Adding other info about it, the upper signs are over the first ring so no problems at all, but the lower three, the ones you can feel it with nail, are between first and second ring.
So they will never stop rusting?
Better photo:
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Re: Machined block, ok or not?
AT this point, armed with what you have heard from the veteran crowd, you both see what your comfort level is.
Flip a coin, rock paper scissors, high card, etc.
Rust never sleeps. If you leave it dry it will keep on growing. Oily and running, not so much.
Flip a coin, rock paper scissors, high card, etc.
Rust never sleeps. If you leave it dry it will keep on growing. Oily and running, not so much.
Dave Koehler - Koehler Injection
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"Never let a race car know that you are in a hurry."
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Re: Machined block, ok or not?
Just to keep things in perspective, the end gap on your rings will flow about 50 times more blowby than those minor rust pits. The engine will never know those tiny rust stains are there. Keeping cylinder walls thick should be a priority over chasing those insignificant stains. When we come across that same situation we put navel jelly on pitted areas after boring and let sit for an hour, then finish hone.This works the best to stop the rust from growing back. My guys and i have built literally hundreds of engines with those same "ghost stains" with ZERO issues. Many were race applications that we see back for scheduled freshen ups. They don't get worse when running.
Carlquist Competition Engines
Re: Machined block, ok or not?
Those would not bother me either. I'd run it.
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brent@lykinsmotorsports.com
www.lykinsmotorsports.com
www.customfordcams.com
Custom Ford Windsor, Cleveland, and FE Street/Race Engines
Re: Machined block, ok or not?
Recurring theme?? https://www.speed-talk.com/forum/viewtopic.php?f=1&t=53204
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Re: Machined block, ok or not?
I do like the idea of getting iron oxide chunks and flakes out of the pits somehow, before going into service.
My reasoning (?) it will be one, (or ten) fewer things for the rings to have to deal with.
My reasoning (?) it will be one, (or ten) fewer things for the rings to have to deal with.
Re: Machined block, ok or not?
Likewise.MotionMachine wrote: ↑Wed Nov 14, 2018 8:10 am Totally insignificant IMO. I've seen much worse put together and run with no issues.
The oil rings don't cross it so it won't hurt them at all, and it looks like only the top ring will touch them near TDC, so again, who cares.
I've seen far FAR worse run great with no compression or consumption issues.
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Re: Machined block, ok or not?
If really bothered, position the block so the rusty area is the low point, build a clay dam around it, pour in white vinegar and soak for a few hours, high pressure wash the dissolved rust out then oil well right away.Dan Timberlake wrote: ↑Sun Nov 18, 2018 1:59 pm I do like the idea of getting iron oxide chunks and flakes out of the pits somehow, before going into service.
My reasoning (?) it will be one, (or ten) fewer things for the rings to have to deal with.
Craig.
Re: Machined block, ok or not?
woody b wrote: ↑Thu Nov 15, 2018 9:42 am Recurring theme?? https://www.speed-talk.com/forum/viewtopic.php?f=1&t=53204
I'm quite unlucky with blocks
Re: Machined block, ok or not?
cjperformance wrote: ↑Sun Nov 18, 2018 8:43 pmIf really bothered, position the block so the rusty area is the low point, build a clay dam around it, pour in white vinegar and soak for a few hours, high pressure wash the dissolved rust out then oil well right away.Dan Timberlake wrote: ↑Sun Nov 18, 2018 1:59 pm I do like the idea of getting iron oxide chunks and flakes out of the pits somehow, before going into service.
My reasoning (?) it will be one, (or ten) fewer things for the rings to have to deal with.
Good idea, thanks!