[75GMCman]

I just bought a 383 stroker kit from eagle part # B13404E30 and I thought there would be main and rod bearing oil clearance spec's, but I was wrong! Can someone tell me what these spec's are?

Thanks Caleb.

[techinspector1]

Caleb, you'll get many different answers to this question, but generally speaking, 0.0015" to 0.002" on the rods and 0.00175" to 0.0025" on the mains.

[machine shop tom]

When you have that crank turned to fix the screwed-up journals, you can discuss the clearances with the machinist.

tom

[racecar100]

I've seen too many Eagle Crank and rods torlrance is way out much as .002. So I went to Scat and never had any problems.

[coldknock]

Originally Posted by machine shop tom

When you have that crank turned to fix the screwed-up journals, you can discuss the clearances with the machinist.

tom

To the original poster, Don't think Tom is just yankin' yer chain. He's serious and so am I. Take the crank to your shop and have it checked out. More of then than not Eagle cranks need it.

Don't use a stretch guage on the rod bolts either, if they're the I-beam rods.



Larry

[fiscus]

You can run up to .003" clearance on the mains and rods if thats what you end up with.

[Crosley]

I've had Scat crank shafts way out too.

The one in my current 383 sbc was cut .010 on the mains and rod throws to straighten out the problems.

My machine guy says Eagle has fewer problems..... and some companies take the cranks and 'tune' them up before selling them at a marked up price

[CNC BLOCKS NE]

Originally Posted by Crosley

I've had Scat crank shafts way out too.

The one in my current 383 sbc was cut .010 on the mains and rod throws to straighten out the problems.

My machine guy says Eagle has fewer problems..... and some companies take the cranks and 'tune' them up before selling them at a marked up price

We stopped using Eagle cranks years ago they were so bad and Liberty Engine parts warehouse has seen a number of Cast 383 cranks break on the front and not buy the same customers they sell to either.

I have found Scats to be a better peice but we have gone to the Callies Comstar crank as those are top of the line and are dead nuts straight and journal size is right on from journal to journal.

I Think Tom can verify that!!

[machine shop tom]

I find the Scat cast cranks are better than Eagle's cast and forged series. Scat's forged (4340) cranks seem to be quite good lately.

I agree with Carl, the Compstars are very good quality.

Eagle's forged are ok if you have them fixed in the beginning. I too have seen the cast Eagle 383 cranks break.

I will not sell and would not recommend the Eagle SIR I-Beam rods for any SBC application.

tom

[75GMCman]

How are you guys making these cranks break ? (racing, dyno, race engines)?

[CNC BLOCKS NE]

Originally Posted by 75GMCman

How are you guys making these cranks break ? (racing, dyno, race engines)?

I never use cast cranks in my builds!! But the sales rep from Liberty said they were mostly street and strip builds.

[machine shop tom]

Originally Posted by 75GMCman

How are you guys making these cranks break ? (racing, dyno, race engines)?

I don't it's entirely the owner's fault.

I have seen 2 break in a 4x4 truck.

tom

[75GMCman]

Did they tell you what they were doing when it did break?

Caleb

[black93z28camaro]

ive got a 93 z28 camaro. It has 110xxx on it right now and in the next year or two im planning on putin the 383 stroker kit in it. I want to do most of it by myself. Can anyone tel me what all i need to do to get it ready for the 383. I know all the parts you need for it. I know u have to bore out your block .0030. What all needs to be done?

[techinspector1]

Check 3 places. Small end of rod to underside of piston crown, rod to cam lobe and rod to block lip at the oil pan.