File Fitting rings?
06-03-2010, 06:09 PM
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File Fitting rings? I am new to doing this but I want to do it myself without taking it to a shop, otherwise I will never learn..
I have a set of pistons that are 3.902 bore and use 1.5 1.5 3mm rings,
I plan to use a supercharger on this setup for the ls1.
according to the manufacturer of the pistons ring gap should be .003-.007" due to the boost being added.
I am ordering a set of piston rings that are 3.905" would these be good ones to start with or should I go up to a 3.910" rings and file down? Id like to end up with .005" gap as then I would be right in the middle of what the company specs.
does this sound right or am I missing? please help me before I order the wrong parts
and as said before I want to do this myself.. gotta figure it out sometime..
I have a set of pistons that are 3.902 bore and use 1.5 1.5 3mm rings,
I plan to use a supercharger on this setup for the ls1.
according to the manufacturer of the pistons ring gap should be .003-.007" due to the boost being added.
I am ordering a set of piston rings that are 3.905" would these be good ones to start with or should I go up to a 3.910" rings and file down? Id like to end up with .005" gap as then I would be right in the middle of what the company specs.
does this sound right or am I missing? please help me before I order the wrong parts
and as said before I want to do this myself.. gotta figure it out sometime.. 
06-03-2010, 06:10 PM
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I also believe the piston walls will be honed to 3.905" if it matters to know that..
I believe that since the bore will be 3.905-3.906" depending on the machine shops accuracy, the piston rings I decided with 3.905" will work well. I can then put them in the bore and spec them with a feeler gauge and file till I have the proper gap needed for the boosted setup. and then the bore will be within spec of the piston manufacturer which is .0025- .0065 for boosted motors.
does this sound correct to everyone?
I believe that since the bore will be 3.905-3.906" depending on the machine shops accuracy, the piston rings I decided with 3.905" will work well. I can then put them in the bore and spec them with a feeler gauge and file till I have the proper gap needed for the boosted setup. and then the bore will be within spec of the piston manufacturer which is .0025- .0065 for boosted motors.
does this sound correct to everyone?
Last edited by sinful7; 06-03-2010 at 06:16 PM.
06-03-2010, 09:50 PM
#3
I also believe the piston walls will be honed to 3.905" if it matters to know that..
I believe that since the bore will be 3.905-3.906" depending on the machine shops accuracy, the piston rings I decided with 3.905" will work well. I can then put them in the bore and spec them with a feeler gauge and file till I have the proper gap needed for the boosted setup. and then the bore will be within spec of the piston manufacturer which is .0025- .0065 for boosted motors.
does this sound correct to everyone?
I believe that since the bore will be 3.905-3.906" depending on the machine shops accuracy, the piston rings I decided with 3.905" will work well. I can then put them in the bore and spec them with a feeler gauge and file till I have the proper gap needed for the boosted setup. and then the bore will be within spec of the piston manufacturer which is .0025- .0065 for boosted motors.
does this sound correct to everyone?
.0065 times a 4" bore would be a .026 gap. If you are going to do this yourself you will need a quality filing kit (summit sells a nice one) that will square the ring in the bore for measuring and file the rings squarely.
