Aussie-Built LS1 V12 To Hit US Market in 2017, Here's a Dyno Test

The internal combustion adventure comes from the Corish brothers, Mick and Shane, who have joined a pair of LS1 V8s. While keeping the LS1 bore and stroke, the resulting mechanical heart comes with a 519 ci (8.55 liters) displacement.

Each of the original LS1s lost a pair of cylinders, while the crankshaft and camshaft required serious fabrication work. Nevertheless, while most V12 use a 60-degree angle, the GM roots of this unit means we're dealing with a 90-degree take.

The vee-twelve was recently strapped to an engine dyno, with the result being a respectable 717 hp and lb-ft (850 Nm). Nevertheless, while the performance can be further improved, the reliability and drivability aspects are currently the main focus of the Corish family.

The brothers plan to give a 1968 Camaro a V12 heart transplant for the 2017 SEMA show to ensure their V12 crate engine enters the US market with a bang - as we mention in the title, the unit is scheduled to become available next year.

And while the piece of footage below, which comes from the Fullboost local team of enthusiasts, offers us a delicious sample of what this engine can do in terms of smooth power delivery, here are the main specs of the unit:

• 519ci capacity / 8.55L, 10.2:1 compression
• 3.898" bore, 3.622" stroke
• (Stock LS1 bore and stroke)
• Billet crankshaft designed by V12LS.com (the brothers' website)
• Camshaft: Billet Clive Cams hydraulic roller (228/238 with 0.589" lift)
• Heavy duty valve springs
• Custom made copper head gaskets,
• Stock unported GM 241 cylinder heads
• Modified GM LS1 exhaust manifolds
• FAST EZ-EFI throttle bodies
• ECU: Haltech Elite 2500
• Ignition: 12x LS1 coils

P.S.: Given the odd firing on this LS1 mix, the unusual soundtrack delivered here shouldn't come as a surprise.