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

Fox "Piston ring gap really does not matter that much"

  • Thread starter Thread starter Gnfanatic
  • Start date Start date Mar 8, 2022
G

Gnfanatic

5 Year Member
Sep 27, 2018
66
8
18
Long Island, NY
Mar 8, 2022
#1
  • Mar 8, 2022
  • #1
Hey guys, I got my block honed, it was clean but wanted the bores to be fresh for new rings. Ordered a set of Speed pro E-458K (STD) which is pretty popular for the stock metric pistons. I checked the gap on the compression rings and was shocked that the top rings were at .030 and the second ring was at .026 in all bores. I called up speed pro for some guidance and the tech stated that they make rings loose now and I would not have an issue with that gap? i am very surprised about this and do not feel comfortable using these rings. I verified the box was the correct # on it as well. What you guys think? I have the TRW factory pistons so not sure who else makes rings for them.
 

vristang

15 Year Member
Mar 31, 2005
4,933
101
124
Seattle
Mar 8, 2022
#2
  • Mar 8, 2022
  • #2
I don't know a lot about rings... but, they might know a thing or 2 about rings... especially the ones they make...

I'm sure you could find another manufacturer that will allow you to set a tighter gap, if you decide to do so. Most rings all fall under standard sizes.

How will the engine be used?
 
G

Gnfanatic

5 Year Member
Sep 27, 2018
66
8
18
Long Island, NY
Mar 8, 2022
#3
  • Mar 8, 2022
  • #3
vristang said:
I don't know a lot about rings... but, they might know a thing or 2 about rings... especially the ones they make...

I'm sure you could find another manufacturer that will allow you to set a tighter gap, if you decide to do so. Most rings all fall under standard sizes.

How will the engine be used?
Click to expand...
Hi. Simple 325hp street car.NA
 

evintho

20+ Year Stangneter
Nov 12, 2003
683
245
73
Santa Rosa, CA.
Mar 8, 2022
#4
  • Mar 8, 2022
  • #4
Don't know what you have but, on my '93 5.0 factory specs call for a top ring gap of 0.010-0.020 and second ring gap 0.018-0.028. I gapped my top ring just under the high end at 0.018 and the second ring at 0.025. Sounds like your second ring is within tolerances, for a '93 5.0 anyway.

 

Bullitt347

I have been doing it wrong this whole time
15 Year Member
Mar 23, 2007
3,944
2,898
194
Middle of Maine
Mar 8, 2022
#5
  • Mar 8, 2022
  • #5
The gap is fine, especially if you put boost to it or run some nitrous.
Even N/A I doubt that you will have any problems.
 
Reactions: Monkeybutt2000 and KZGUNS

GT40XStang9

Thanks to Tim, I get off pretty easy.
Founding Member
Feb 26, 2001
25
33
89
Scotland UK
Mar 12, 2022
#6
  • Mar 12, 2022
  • #6
Make sure your crankcase is well ventilated.
 

7991LXnSHO

wanna catch the space herp
10 Year Member
Sep 1, 2010
7,387
2,745
194
Kearney, NE
Mar 12, 2022
#7
  • Mar 12, 2022
  • #7
GT40XStang9 said:
Make sure your crankcase is well ventilated.
Click to expand...
Throwing a rod should be plenty of ventilation.
Welcome back old timer.
 
B

BrewsterGT

Member
May 6, 2022
18
3
13
Burleson, Texas
May 8, 2022
#8
  • May 8, 2022
  • #8
Bullitt347 said:
The gap is fine, especially if you put boost to it or run some nitrous.
Even N/A I doubt that you will have any problems.
Click to expand...
What he said.
 
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