• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Looking For The Right Piston Rings

  • Thread starter Thread starter srjs28
  • Start date Start date Apr 8, 2010
S

srjs28

New Member
Jan 12, 2010
69
0
0
Apr 8, 2010
#1
  • Apr 8, 2010
  • #1
early i created a thread asking which piston rings to use. after further research i found that there are many different styles such as material they are made of, coated or not, gapless or not, filing or not. maybe someone can help narrow my search. here is what i got. stock 302 block with standard bore and stock pistons. all im doing is having the block honed and replacing rings on stock pistons with 85,000 miles. just a hone should still allow me to use the standard 4.000 bore correct? the machine shop needs the pistons and rings before they hone it so i planned on getting the standard bore size. also i do not own a piston ring filer or precise enough tools for the measuring. this started off as a small budget build but has gone over by about $2000. and new pistons and boring is just too exspensive right now. any incite would help.
 
J

JR4 Motorsports

New Member
Aug 5, 2009
18
0
0
Carmel, NY
Apr 8, 2010
#2
  • Apr 8, 2010
  • #2
Wait, have the shop measure the bores before you buy rings. You may be to far gone for just a re ring. If they hone it you may now get too much piston to cylinder gap. Were you able to feel any ridge at the top of the cylinders? The shop most likely wants the pistons so they can measure the clearance. I would have them do that first, then decide if you can re hone, or will it need to be bored.
 

1987stangman

Member
Jul 12, 2006
684
24
19
Apr 8, 2010
#3
  • Apr 8, 2010
  • #3
JR4 Motorsports said:
Wait, have the shop measure the bores before you buy rings. You may be to far gone for just a re ring. If they hone it you may now get too much piston to cylinder gap. Were you able to feel any ridge at the top of the cylinders? The shop most likely wants the pistons so they can measure the clearance. I would have them do that first, then decide if you can re hone, or will it need to be bored.
Click to expand...


+1 on that, however, I used (on 2 diff builds) Sealed Power (Fed. Mog) moly rings. Stock size part number E458K assuming your pistons are the TRW forged. They are direct fit but really should be checked, obviously.
 
S

srjs28

New Member
Jan 12, 2010
69
0
0
Apr 9, 2010
#4
  • Apr 9, 2010
  • #4
JR4, there was no real sharp edge at top of cylinder, it was more built up with carbon then anything. after 80,000 miles i can still see somewhat or a cross hatch. that seemed weird to me and i know the motor has never been crack open before.
Stangman, did you have to file your rings? and my pistons are stock from factory sooo.. not sure if they are TRW forged. thanks for the input
 
You must log in or register to reply here.

Similar threads

9
Milton Questions, 351 swap newedge
  • 996stang
  • Jul 20, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
1
Views
198
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 25, 2026
Killer351w
K
6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
736
1965 - 1973 Classic Mustangs -General/Talk- Jun 20, 2026
gray owl
G
Engine 302 production block selection
  • FastDriver
  • May 19, 2024
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
48
Views
7K
Fox 5.0 Mustang Tech Jul 1, 2025
FastDriver
E
Finished my Fox Hydroboost Install - Tips
  • Engineer Duane
  • Apr 9, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
4
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 5, 2025
Engineer Duane
E
G
Fox "Piston ring gap really does not matter that much"
  • Gnfanatic
  • Mar 8, 2022
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
7
Views
4K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 8, 2022
BrewsterGT
B
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?