Current test motor is an aluminum 5.3 with ported cathedral heads/LS6 intake, and 120lb injectors. I plan to push it as far as it will go.... meaning 1000rwhp and driving this weekly most likely around 14psi which will be around 750rwhp as max power. Lower gears get lower boost levels via boost by gear.
Summit had a sale on LS9 blocks last year so I picked one up for $1808 delivered. Being machined with torque plates from GM at the factory they basically need ZERO machine work. Getting a Molnar 3.622" crank/rods and found some low mileage used LS9 heads to be ported for the final motor going inside. That should make the GTS76 turbo spool nicely with an additional extra liter of engine capacity (.9 liters). Most likely just run a stock LS3 intake as we have made 1200rwhp with them using a bigger turbo already in my LS9 turbo RX-7. It will be mothballed until the 5.3 gives up the ghost.
Last edited by gnx7; 02-23-2020 at 03:32 PM.
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