How to tell LSX B15 from B8? Differences?

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03-24-2021, 11:58 AM

momofx

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How to tell LSX B15 from B8? Differences?

Does anyone know how to tell LSX-B15 block from a B8 block visually without tearing it apart?

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03-24-2021, 12:40 PM

1FastBrick

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Quote:

Originally Posted by momofx

Does anyone know how to tell LSX-B15 block from a B8 block visually without tearing it apart?

The Block is the same LSX block.

The Internals are different between the 2.
The B8 uses factory Powdered metal rods and the B15 has forged rods.

The only other visual thing I have seen is the valve covers between the two.

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03-24-2021, 01:01 PM

SLOW SEDAN

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Pretty big one is that the B8 has 4 bolt heads, B15 has 6 bolt heads.

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03-24-2021, 01:08 PM

1FastBrick

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Quote:

Originally Posted by SLOW SEDAN

Pretty big one is that the B8 has 4 bolt heads, B15 has 6 bolt heads.

It seems you are correct.

I re read and also noticed the B8 has a standard Nodular crank with 6 bolt rear flange while the B15 has a forged crank with an 8 lug bolt pattern. Possibly from an LSA or something like that.

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