piston ring gap question
02-21-2017, 05:41 PM
#1
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piston ring gap question Built a lm7 5.3 all new bearings ect, i did not gap the rings went with stock everything. If i want to spray it with a 150 how much should i gap the rings? Probably seems like a dumb question but i want everybodys input thanks
02-26-2017, 08:35 PM
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thanks for the input , i wasnt going to even worry about it but changed my mind and going to gap the 1st and 2nd ring at .030
02-27-2017, 10:16 AM
#5
That's a lot of gap for a small nitrous shot.
I'd do .024/.026 at the max but more likely .020/.022.
Wiseco has a handy little chart as well on ring gaps:
Multiply your bore size in inches times the value on the table.
For small nitrous and 3.78" bore it works out to .019"/.021" or so. Hence why I'd probably open it up a smidge and go .020/.022.
I'd do .024/.026 at the max but more likely .020/.022.
Wiseco has a handy little chart as well on ring gaps:
Code:
Top ring 2nd ring Oil rail Most standard engines 0.004 0.005 0.015 Nitrous Oxide 0.005 0.0055 0.015 High performance racing 0.0055 0.0053 0.015 Racing with Nitrous/ Turbo 0.006 0.0057 0.015 Blower / Forced induction 0.007 0.0063 0.015
For small nitrous and 3.78" bore it works out to .019"/.021" or so. Hence why I'd probably open it up a smidge and go .020/.022.