Which piston rings do you prefer?

F

filburn

New Member

May 2, 2005

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Apr 17, 2006

#1

• Apr 17, 2006

• #1

I recently disassembled my engine. It is a 302 that has been over bored 0.030" and it has a 347 stroker kit in it. When the piston rings were installed the rings were part of a kit. Unfortunately there is no documentation on which rings came with the kit other than "Race Rings". Summit racing offers rings that will work that ranges from 75$ to $200. That's a large gap. I don't want to waste money on rings that are meant for a better engine and I don't want to get cheep rings that will damage my engine. I intend on using a mild amount of nitrous. This will be a street (occasional strip) car. What piston rings do you guys recommend?

Filburn

 

rd

Founding Member

Jan 12, 2000

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Ocean Springs MS

Apr 17, 2006

#2

• Apr 17, 2006

• #2

Speed pro moly surfaced rings. Pn 93 something....

About $100 or so at Summit. I got the ones with pre set end gaps, but I did check the end gaps.

 

F

filburn

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May 2, 2005

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Apr 18, 2006

#3

• Apr 18, 2006

• #3

Ive done some research and it looks like here are my options. Iron or Cast Iron rings coated with either a chromemoly, plasma-moly, or no coating at all. So which is better? Iron or cast iron? Also, what is chromemoly and plasma-moly coatings? which would be best for Nitrous?

Thanks for any info,
FIlburn

 

samickguy15

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Sep 1, 2005

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Delavan, IL

Oct 22, 2007

#4

• Oct 22, 2007

• #4

Bump...I haven't found much searching, so I'll bump it for a fresh look...

 

F

FullAuto

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Aug 29, 2002

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Midwest City, Ok

Oct 22, 2007

#5

• Oct 22, 2007

• #5

Hellfire

 

5spd GT

"the 5.0 owns all"

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Aug 7, 2002

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Arkansas

Oct 22, 2007

#6

• Oct 22, 2007

• #6

The Plasma-moly coated top rings, and iron second rings seem to be the most popular for all-around engines.

The top rings wear out first no matter what, so they usually get a 'special treatment'...

I beilieve the nitride rings are pretty nice if I recall

Are you using the 1.090" piston? If so, you will need a oil support ring.

 

PUNISHER RACING

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Aug 27, 2007

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Oct 22, 2007

#7

• Oct 22, 2007

• #7

Go with a Cast or Plasma Moly ring stay away from Chromoly rings they have to long a seat time for me. The Speed Pro Plasma works well!

 

Rick 91GT

Mustang Master

Nov 29, 1999

9,692

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PA

Oct 23, 2007

#8

• Oct 23, 2007

• #8

PUNISHER RACING said:

Go with a Cast or Plasma Moly ring stay away from Chromoly rings they have to long a seat time for me. The Speed Pro Plasma works well!

Click to expand...

I agree there, stay with a good plasma moly top. Look at the Total Seals, and if you want a little more street life go with the HR series it will have a little more oil ring tension the the low tension sets...but not near the standard ring. I use Perfect Circles, Total Seals, and some Spreed Pro in my street engines... File to fit is the best option, if you do not know how to properly file rings, have them done by a professional. Make sure you get the pistons cleaned or clean them really well, the ring grooves have to be cleaned. Make sure you get the proper size rings to match your piston, you can re-use your support rails as long as they are not damaged which they shouldn't be.

Fullauto, Hellfires in a street car?? A little extreme unless you have a ton of boost or juice.

 

samickguy15

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Sep 1, 2005

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Delavan, IL

Oct 23, 2007

#9

• Oct 23, 2007

• #9

5spd GT said:

Are you using the 1.090" piston? If so, you will need a oil support ring.

Click to expand...

It's for a 351W. They're the KB 9925's, so 1.774 IIRC.

 

5spd GT

"the 5.0 owns all"

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Oct 23, 2007

#10

• Oct 23, 2007

• #10

samickguy15 said:

It's for a 351W. They're the KB 9925's, so 1.774 IIRC.

Click to expand...

Oh, I was talking to the original poster