Ring end gaps
02-23-2015 | 01:16 PM
#21
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From: bel air, md
Please explain how bleeding off the rear of the intake helps to equalize temp from front to back?
02-23-2015 | 01:19 PM
#23
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From: Virginia Beach
Tom,
The delta between the water entrance/exit temp. The dimensional change in bore diameter on a 4.250" bore between 60º F and 210º can run from .002125" - .00425", depending on a number of factors. That can be exacerbated on a cylinder to cylinder basis based on localized temp variances in a thermally unstable block.
Bob
The delta between the water entrance/exit temp. The dimensional change in bore diameter on a 4.250" bore between 60º F and 210º can run from .002125" - .00425", depending on a number of factors. That can be exacerbated on a cylinder to cylinder basis based on localized temp variances in a thermally unstable block.
Bob
Incoming water temperature being 60 degrees, I don't think I'd see anything higher than 160 degrees on the gauge... so a hundred degree difference or less. That would be my target anyway. It seems that there are a number of unknowns here especially the unknowns around the unstable block factor (how would we even know if it were stable or not?). Regarding the block itself, it is clean, passed sonic checking, did not require boring to fix anything. It is a 26-27 year old seasoned piece.
-Tom
02-23-2015 | 01:25 PM
#26
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From: bel air, md
02-23-2015 | 01:27 PM
#27
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From: Virginia Beach
02-23-2015 | 01:38 PM
#28
MarineKinetics
Joined: Oct 2002
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From: Rochester, NY
I see, though I'm not sure of how to drum up an answer.
Incoming water temperature being 60 degrees, I don't think I'd see anything higher than 160 degrees on the gauge... so a hundred degree difference or less. That would be my target anyway. It seems that there are a number of unknowns here especially the unknowns around the unstable block factor (how would we even know if it were stable or not?). Regarding the block itself, it is clean, passed sonic checking, did not require boring to fix anything. It is a 26-27 year old seasoned piece.
-Tom
Incoming water temperature being 60 degrees, I don't think I'd see anything higher than 160 degrees on the gauge... so a hundred degree difference or less. That would be my target anyway. It seems that there are a number of unknowns here especially the unknowns around the unstable block factor (how would we even know if it were stable or not?). Regarding the block itself, it is clean, passed sonic checking, did not require boring to fix anything. It is a 26-27 year old seasoned piece.
-Tom
Understood. My question was intended to determine the temperature differential, from max to min, in various areas of the block. Based on that information, running an open bore block, seeing potential 60 º min. water temp and a max bore coolant temp of 160º, I would suggest you open the gaps from .003"-.004" to compensate for the lowest internal temp.
The concept of thermal stabilization is a worthwhile conversation (for another thread), however i do not want to derail your inquiry for a viable answer to your question.
Bob
02-23-2015 | 01:46 PM
#29
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From: chicago
I don't run any water thermostats. My water temp coming out of my block is never more than 110*. Water going in is between 60-70 deg.
I used to run water dumps off the rear off my intakes when I had 250 blowers. When I switched to the 420 blowers I didn't drill and tap the intakes. I've been running it that way for about 100 hours now with no issues.
I used to run water dumps off the rear off my intakes when I had 250 blowers. When I switched to the 420 blowers I didn't drill and tap the intakes. I've been running it that way for about 100 hours now with no issues.
02-23-2015 | 01:55 PM
#30
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From: Toronto, Canada
I don't run any water thermostats. My water temp coming out of my block is never more than 110*. Water going in is between 60-70 deg.
I used to run water dumps off the rear off my intakes when I had 250 blowers. When I switched to the 420 blowers I didn't drill and tap the intakes. I've been running it that way for about 100 hours now with no issues.
I used to run water dumps off the rear off my intakes when I had 250 blowers. When I switched to the 420 blowers I didn't drill and tap the intakes. I've been running it that way for about 100 hours now with no issues.
