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

Bearing Clearance

  • Thread starter Thread starter 89llx
  • Start date Start date Sep 24, 2014
8

89llx

5 Year Member
Aug 31, 2009
302
5
29
Sep 24, 2014
#1
  • Sep 24, 2014
  • #1
What range of rod and main bearing clearance do I want, on a HCI 5.0 with 10psi of Vortech

Thanks


stock short block
 

84Ttop

They make new pistons every day, so why worry?
5 Year Member
Jul 2, 2009
5,222
3,254
204
South Jersey
Sep 24, 2014
#2
  • Sep 24, 2014
  • #2
The stock clearances will work fine in that application.

For reference:
main bearing
allowable 0.0004 to 0.0026 in (I prefer .0015 as a target)

connecting rod journal
allowable 0.0008 to 0.0026 in (I prefer .0015 as a target)
 
Reactions: Gearbanger 101
8

89llx

5 Year Member
Aug 31, 2009
302
5
29
Sep 24, 2014
#3
  • Sep 24, 2014
  • #3
Thanks !!!!
 

7991LXnSHO

wanna catch the space herp
10 Year Member
Sep 1, 2010
7,387
2,745
194
Kearney, NE
Sep 25, 2014
#4
  • Sep 25, 2014
  • #4
It is the ring end gaps I would be concerned about with forced induction. The extra air and fuel can create extra heat, then the rings can expand enough to hit the ends and seize in the bore. That will break your piston. But how much bigger the gap needs to be, I can not tell you.
 
8

89llx

5 Year Member
Aug 31, 2009
302
5
29
Sep 25, 2014
#5
  • Sep 25, 2014
  • #5
Good point
 
8

89llx

5 Year Member
Aug 31, 2009
302
5
29
Sep 25, 2014
#6
  • Sep 25, 2014
  • #6
per Federal Mogul,-- 6 thousands per every inch of bore, so for a 5.0 24-26 thousands
 

elarm1

10 Year Member
Dec 17, 2010
1,428
652
154
N.Va
Sep 25, 2014
#7
  • Sep 25, 2014
  • #7
I just used stock clevites with moly rings in my application. Should work fine for my build as should yours
 
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