Main Bearing Clearence's?

OK set the bearing up sunday night to .003 on the mains. so right now I'm re-cleaning all the Mains and Crank and getting ready to drop the crank in and torquer down and then the rods. I already file fit all the rings and everything is laid out on the bench wait to go together. So I see if we get .0025-.003 on the rods.

Ace

Lake Speed Jr. is Joe Gibbs Racing's main oil guy and I spoke w/him at the Seminar. I talked to him about bearing clearances. He was saying that the days of critical bearing clearances can now be controlled w/todays much improved oil/viscosities.

First try on the rods are .0015 wow? Got another set that are .001 extra and now there .002. OK Now what????? Really would like .0025-.003


Ace

You are ok,just use a good oil. The nascar boys are running those clearances and goin 600 mi.

used 20/50 Vr1 valoline for years. Might try a lighter oil this year

Ace

W0W,thats crazy close

rmcomprandy wrote:

bbf-falcon wrote:You are ok,just use a good oil. The nascar boys are running those clearances and goin 600 mi.

Actually Rick ... the NASCAR guys are running around .0008" with a Honda size journal.

What are they running for oil? vegtible oil

powerstrokeace wrote:

rmcomprandy wrote:

bbf-falcon wrote:You are ok,just use a good oil. The nascar boys are running those clearances and goin 600 mi.

Actually Rick ... the NASCAR guys are running around .0008" with a Honda size journal.

What are they running for oil? vegtible oil

Kristina Lawyer is selling the Tech seminar dvd that has Lake speed jr. talking about oils. If the audio is good and clear it will be good to listen to him talk about this subject. If not I have his card and #. You can email/call him.

OK mic'ed put the crank at 1.196 and then put the bearing in the rod and torqued it down and it was a 1.198-1.199. So I would say .0025 would be the end result. As for oil I will be switching to 10-40 or 10-30 just for grins this year. Its pretty cold in the start of the season around here.

Ace

powerstrokeace wrote:OK mic'ed put the crank at 1.196 and then put the bearing in the rod and torqued it down and it was a 1.198-1.199. So I would say .0025 would be the end result. As for oil I will be switching to 10-40 or 10-30 just for grins this year. Its pretty cold in the start of the season around here.

Ace

My math shows .001

bbf-falcon wrote:

powerstrokeace wrote:OK mic'ed put the crank at 1.196 and then put the bearing in the rod and torqued it down and it was a 1.198-1.199. So I would say .0025 would be the end result. As for oil I will be switching to 10-40 or 10-30 just for grins this year. Its pretty cold in the start of the season around here.

Ace

My math shows .001

1.199-1.196=0.003

1.198-1.196=0.002

The bbc std. rod journal......
2.1998" high side
2.1988" low side
Most racing crankshafts come in ~2.199"

delete

powerstrokeace wrote:

rmcomprandy wrote:

bbf-falcon wrote:You are ok,just use a good oil. The nascar boys are running those clearances and goin 600 mi.

Actually Rick ... the NASCAR guys are running around .0008" with a Honda size journal.

What are they running for oil? vegtible oil

WD 40 with green food coloring for performer enhancement.....................

powerstrokeace wrote:OK mic'ed put the crank at 1.196 and then put the bearing in the rod and torqued it down and it was a 1.198-1.199. So I would say .0025 would be the end result. As for oil I will be switching to 10-40 or 10-30 just for grins this year. Its pretty cold in the start of the season around here.

Ace

Been on the run all day. OK let straighten this out
Cranks journal 2.196
Rod 2.198-2.199
I know I dont have the right tools to measure them but this is the closest I could get. Used a 12" long slide calipher. (spelling)

Ace