Piston rings recommendation

Engines, Transmissions & Final Drive questions and answers

Moderators: timk, Stu, zombie, Andrew, The American, Lokiel, -alex, miata, StanTheMan, greenMachine, ManiacLachy, Daffy

Post Reply
manga_blue
Forum Guru
Posts: 4897
Joined: Mon Apr 24, 2006 7:27 pm
Vehicle: NA8
Location: Moruya, NSW

Re: Piston rings recommendation

Postby manga_blue » Mon Mar 07, 2016 10:44 am

Have you checked bore diameter? 0.05mm of bore wear will translate to a 0.31mm increase in ring gap. As a general guide it might be worth measuring gap with one of your exisitng rings to see what variation there is at various points from the top of the bore down to the very bottom.
’95 NA8
Top
booki89
Fast Driver
Posts: 191
Joined: Sat Dec 28, 2013 3:56 pm
Vehicle: NA8
Location: Melbourne

Re: Piston rings recommendation

Postby booki89 » Mon Mar 07, 2016 12:12 pm

I have not checked the bore, but results are consistent between the unworn part of the bore and where the rings move up and down., so I do not believe there is any bore wear.

Also the factory hone marks were still visible when I took it apart.

Is it just me or is it weird that a new set of piston rings will have a larger ring end gap then the used rings that came out of the engine ?
Top
Post Reply

Return to “MX5 Engines, Transmission & Final Drive”

Who is online

Users browsing this forum: No registered users and 46 guests