VAC Billet Block

[bluptgm3]

LOL!! Is this for real? Who is going to buy a Billet M/S5X Block at that price?

VAC store page


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[GG///M3]

That crank with their special crank that increases displaced would be amazing

[ScotcH]

I mean ... it's a high price, but damn, a 3.2L aluminum N/A engine would be pretty sweet, lol (worth the 50 lbs? only you can decide )

[Greenday694]

It looks pretty good to me. Throw in the 4 bolt mains, upgrade head studs, dry-sump, and stroker crank. Should handle some serious power.

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[NeilM]

Love the $9999.95 price. That saved nickel makes all the difference.

Neil

[nick325xit 5spd]

People building really expensive turbo motors is who.

People building really expensive NA motors will go billet S54. (Or S14.)

[bluptgm3]

I was pointed to the VAC Instagram page, where it states they have a smooth exterior surface block for NA applications and the external rib reinforced block for boosted applications.


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[nick325xit 5spd]

I was pointed to the VAC Instagram page, where it states they have a smooth exterior surface block for NA applications and the external rib reinforced block for boosted applications.


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The great thing about CNC on demand is that they don't need to inventory these things. And whatever modeling that they did to design the new block probably made it really easy to create a "low strength" alternate.

[jakermac]

worth the 50 lbs? only you can decide

Does VAC make that statement anywhere? The OEM single Vanos aluminum M52 block is 50lbs lighter than the iron one (as verified by me on a scale), but is the VAC one a full 50lbs lighter than the OEM iron one?

[bluptgm3]

The great thing about CNC on demand is that they don't need to inventory these things. And whatever modeling that they did to design the new block probably made it really easy to create a "low strength" alternate.

With in house CAD (CAD Stress Analysis) the smooth surface variant was probably the first cut, with stiffening ribs added for the strength required for high HP applications.

Does VAC make that statement anywhere? The OEM single Vanos M52 block is 50lbs lighter than the iron one (as verified by me on a scale), but is the VAC one a full 50lbs lighter than the OEM iron one?

Are you referring to the alloy block version of the M52 installed in the Z3?
I would not expect the VAC offering to be as light as the cast alloy OE block.

But it does sound like the VAC billet block addresses the head bolt issue in the BMW variant with deeply threaded studs.


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[ScotcH]

Does VAC make that statement anywhere? The OEM single Vanos M52 block is 50lbs lighter than the iron one (as verified by me on a scale), but is the VAC one a full 50lbs lighter than the OEM iron one?

Yeah, no. It was just a guess. No idea what the VAC one weighs. I doubt you'd be buying this for the 50lbs though.

[GG///M3]

Weight is 62lbs

[bluptgm3]

Weight is 62lbs

...vs how much for alloy M52 2.8L and how much for iron S52 3.2L?


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[jakermac]

...vs how much for alloy M52 2.8L and how much for iron S52 3.2L?


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58 and 108.

Are you referring to the alloy block version of the M52 installed in the Z3?

Yes. I have now edited my post.

I doubt you'd be buying this for the 50lbs though.

You're right, I wouldn't personally. But I'm sure there are those at the pointy end of road racing that would.