Ring end gaps
#11
MarineKinetics
Platinum Member
Tom,
Is the entire engine block thermally stable in the field, under load? One of your challenges (with proper gap) is addressing the Delta T, cylinder to cylinder. What is the coldest temp the coolant will see, in the case?
Bob
Is the entire engine block thermally stable in the field, under load? One of your challenges (with proper gap) is addressing the Delta T, cylinder to cylinder. What is the coldest temp the coolant will see, in the case?
Bob
#12
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iTrader: (3)
Does rigidity of the cylinder bore play a part in ring gaps and thermal expansion? In otherwords, would you be following the same guidelines for a dart big m 4.500 bore block as you woukd a 35 year old 454 production block that's been bored once or twice ? As far as expansion rates are concerned and maximum ring seal to bore ?
#13
Platinum Member
Platinum Member
Thread Starter
iTrader: (2)
Does that answer the question?
#14
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They are good rings. Use them in all the motors I have except for those damn stroker pistons in my 496 that require a super expensive rings for some reason.
#15
MarineKinetics
Platinum Member
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
#18
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Ok, thanks. I could see that. But Let's say a low compression (8:1)454 with a 250 blower and sufficient amount of fuel being supplied with a 140-145 degree thermostat. Would that still be hazardous to possible detonation?
#19
Does rigidity of the cylinder bore play a part in ring gaps and thermal expansion? In otherwords, would you be following the same guidelines for a dart big m 4.500 bore block as you woukd a 35 year old 454 production block that's been bored once or twice ? As far as expansion rates are concerned and maximum ring seal to bore ?
#20
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