Posted By: HotRodDave
Offset grindin SB crank? - 02/21/09 09:16 PM
How much can a good std journal 273 crank be offset ground? Can it be ground down engough to use the honda rods? There are no holes in the throw so it should be OK right?
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How much can a good std journal 273 crank be offset ground? Can it be ground down engough to use the honda rods? There are no holes in the throw so it should be OK right?
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you'll effectively destroy an otherwise good crankshaft if you take it to 1.88 journal size on an offset grind for the aforementioned reasons. the oiling holes will be right at the cheek of the fillet.
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you'll effectively destroy an otherwise good crankshaft if you take it to 1.88 journal size on an offset grind for the aforementioned reasons. the oiling holes will be right at the cheek of the fillet.
So an offset grind with honda journals is a no-go. But just grinding down to a honda journal is ok on the oiling hole placement??
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you'll effectively destroy an otherwise good crankshaft if you take it to 1.88 journal size on an offset grind for the aforementioned reasons. the oiling holes will be right at the cheek of the fillet.
So an offset grind with honda journals is a no-go. But just grinding down to a honda journal is ok on the oiling hole placement??
Quote:Quote:Quote:
you'll effectively destroy an otherwise good crankshaft if you take it to 1.88 journal size on an offset grind for the aforementioned reasons. the oiling holes will be right at the cheek of the fillet.
So an offset grind with honda journals is a no-go. But just grinding down to a honda journal is ok on the oiling hole placement??
Thanks.
Now the stock big block cranks don't have a problem going to honda journals? Is that correct?
Quote:You sure Dan? I was just downstairs looking at my steel sb crank and if you removed .250 off the face of the journal by the oil hole(.495 total dia) it wouldnt bring the hole near the fillet..Quote:Quote:Quote:
you'll effectively destroy an otherwise good crankshaft if you take it to 1.88 journal size on an offset grind for the aforementioned reasons. the oiling holes will be right at the cheek of the fillet.
So an offset grind with honda journals is a no-go. But just grinding down to a honda journal is ok on the oiling hole placement??
Thanks.
Now the stock big block cranks don't have a problem going to honda journals? Is that correct?
no, that's not correct. if the manufacturer plans from the beginning to go to 1.88 rod journals, the drill the oiling holes in the proper place to start with. to do it after the fact by reducing a 2.375 journal down to a 1.88 you'd be removing .495". the oiling hole would be coming out the side of the radius on the crank.
for the crank in question, yes, IMO a 2.00 rod journal is doable.
Quote:Quote:You sure Dan? I was just downstairs looking at my steel sb crank and if you removed .250 off the face of the journal by the oil hole(.495 total dia) it wouldnt bring the hole near the fillet..Quote:Quote:Quote:
you'll effectively destroy an otherwise good crankshaft if you take it to 1.88 journal size on an offset grind for the aforementioned reasons. the oiling holes will be right at the cheek of the fillet.
So an offset grind with honda journals is a no-go. But just grinding down to a honda journal is ok on the oiling hole placement??
Thanks.
Now the stock big block cranks don't have a problem going to honda journals? Is that correct?
no, that's not correct. if the manufacturer plans from the beginning to go to 1.88 rod journals, the drill the oiling holes in the proper place to start with. to do it after the fact by reducing a 2.375 journal down to a 1.88 you'd be removing .495". the oiling hole would be coming out the side of the radius on the crank.
for the crank in question, yes, IMO a 2.00 rod journal is doable.
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An off the shelf 3.79" stroke crank is available with 318/340 mains. I believe Mopar Performance sells it.
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sorry ... off topic .... but, RyanJ your PM box is full ....
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How much can a good std journal 273 crank be offset ground? Can it be ground down engough to use the honda rods? There are no holes in the throw so it should be OK right?