I finished assembling the Ls2 Stroker today finally. Chasing small parts took time, the engine came from an '07 vette with 80 miles on it. The owner swapped to an LS7 and in the process they canibalized several things from this engine to convert the 7 over to a wet sump oiling system. Those were the things I've had to figure out and get during assembly.
Hopefully this engine will push hard at 600hp if not exceed it. The crankshaft is a 4" stroker Callies Dragonslayer.
It was installed using Federal Mogul main bearings and ARP stud kit with 12pt nuts. The rods are Callies Compstar with ARP 2000 rod bolts and were installed with Clevite 77 bearings which are polydyne coated. This crank has a 2" crankpin rather than the standard 2.100" so that notching the block is not neccessary. I'm also using the 58x reluctor and 4X cam gear since these are supposed to allow for smoother and more exact ignition tuning.
The block was decked so that the pistons are .010 above the deck. The LS2 factory pistons are usually .007 out and when it was mocked up after honing with torque plates for the new pistons they were .004 below the deck. So I had the machine shop cut .014 from the deck surfaces. This should give me 11:1 compression assembled with the heads I chose. The pistons are Wiesco -8cc dish coated and the rings are perfect circle, chrome moly top, napier second, and a support rail on the oil ring since the pin gets into that ring land.
The cam is a comp cams grind, special ground for me from specs given by Vengeance racing here in Atlanta. Lift is 620 int. and 625 exhaust, duration is in the 230 and 240's range. The cam chain is C5R and the oil pump is a GMPP high volume. The heads I chose are Trick Fow Specialties 225 CNC with 65cc chambers.
Heads were installed with ARP studs and 12pt nuts. The gaskets are GM 6.0 3 layer MLS type.
I finished up with Comp lifters, Trick Flow push rods and Yella Terra shaft type rockers. The damper will be an ATS which I only have the hub on in the pics. It goes with the Vintage Air front runner which is black anodized. I installed the factory valve covers for now since the engine is going in the car for final mock up and header fabrication. They will be replaced with a set of Katech covers and coil relocation brackets during final car assembly. That is when the intake, injectors and Fast fuel rails will also be installed. The intake is a Fast 92mm ported by Vengeance and the throttle body is the stock fly by wire 90mm also ported by vengeance. The oil pan is 4th gen. f-body with an improved racing trap door baffle installed.
Hopefully I'll get the flywheel, clutch assmbly, bellhousing and trans mounted and the entire unit slid in the car this week. We'll see, keep your fingers crossed for me.
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
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