Nissan’s mighty VK56 engine is a powerhouse from the factory and you are about to see how well it responds to modifications/tuning. This 2011 Titan is known as “Red Alert” to owner, Joe E. The big red truck came to ZCG for some extensive NA power upgrades. We started with a throttle body spacer, Doug Thorley long tube headers, Berk Hi-flow cats, and a Stillen cat-back exhaust, followed by Rob’s Uprev tuning.
The quest for more power left us wanting more than 309hp/355tq at the wheels(significant gains over stock, nonetheless) so the cylinder heads were removed and sent to Rebello Racing for some massaging. New Supertec intake valves, ported heads, and higher a compression ratio (9:8:1 to 10:4:1) allow the VK to suck, squish, bang and blow more efficiently.
And you thought Doug Thorley only made headers for Hot Rods and American Muscle cars Look how beautiful these pieces are:
Here is the engine with the front end apart preparing to receive the new JWT cams/valve springs
Cylinder head details below from Rebello with the Supertec intake valves, porting and new JWT cams installed:
With more Uprev tuning Red Alert now makes 342hp and 385tq at the wheels, gains of 58hp and 52tq!!!
Joe will always need to use 91 octane but we don’t think he will mind for the newfound hp and tq these mods added to his TITAN…
Uprev or stay at idle!
Check the gallery for more detailed pictures of the engine work !