Main Bearing Clearence's?

Guys What would you accept for a good main bearing clearance? Rebuilding the 555 (new to me)and just checked the mains and the are .002 on 1-4 and .0017-.0019 ishon the #5. I know the factory wants .005-.0025 and some old performance book I have wants .002-.003.

Funny thing is that this book was printed in 1979 and it recommended the top ring be gapped smaller that the 2nd ring. I was told these ring gaps were new technology!

Ace

I.m.o. less than .003" is not enough.

Lem Evans wrote:I.m.o. less than .003" is not enough.

I agree. Ok, for a stock everyday driver to be .002, but tight for a performance build imo.

Got more Bearing coming. Wish Lem's place wasn't so far a way.

Ace

if your "rebuilding" it i'd think it was working before?

Put her together with .0015" and spray it with a 450 shot.

Lem Evans wrote:Put her together with .0015" and spray it with a 450 shot.

O........he's gona spray it? missed that part.

cool40 wrote:

Lem Evans wrote:Put her together with .0015" and spray it with a 450 shot.

O........he's gona spray it? missed that part.

No...he did not say..spray. Here is the deal....there is no reason to do the main clearance below .003'" on a big inch high HP bbf. If/when the clearance got to .0035" at the thrust bearing it would not hurt my feelings or the bearings.

Lem Evans wrote:Put her together with .0015" and spray it with a 450 shot.

destroke it, and turn it 9500 rpm...................

richter69 wrote:

Lem Evans wrote:Put her together with .0015" and spray it with a 450 shot.

destroke it, and turn it 9500 rpm...................

green oil.......

richter69 wrote:

Lem Evans wrote:Put her together with .0015" and spray it with a 450 shot.

destroke it, and turn it 9500 rpm...................

Lem Evans wrote:

richter69 wrote:

Lem Evans wrote:Put her together with .0015" and spray it with a 450 shot.

destroke it, and turn it 9500 rpm...................

green oil.......

time out! no need to screw up the post with all the foreign language............

cool40 wrote:

richter69 wrote:

Lem Evans wrote:Put her together with .0015" and spray it with a 450 shot.

destroke it, and turn it 9500 rpm...................

Lem Evans wrote:

richter69 wrote:

Lem Evans wrote:Put her together with .0015" and spray it with a 450 shot.

destroke it, and turn it 9500 rpm...................

green oil.......

time out! no need to screw up the post with all the foreign language............

My bad....I meant to say 7.3....sorry

I had to break up all the conformity this place has exhibited in the last few days...........

Boy You Guy's get carried Away.....

While Were here what should I put the rod bearings at?

Ace