Best Heads For 5 3 Turbo

706 852 862 head.

Best heads for 5 3 turbo.

The exhaust port is a unique d shape that improves flow. The 2 00 inch valves accommodate the smaller bores. The 5 3 in question is a junkyard sourced l33 that hasn t had a lot done to it. After installation of the 706 heads the power jumped to 468 hp at 6 800 rpm and 413.

The best factory cathedral port heads 243 799 and 317 castings flowed near 250 cfm which represented a huge step up from the conventional small block heads that preceded them. On the dyno the power output jumped to 451 hp at 7 000 rpm and 379 lb ft of torque at 5 700 rpm. Then tfs gen x 205 heads were installed with a btr stage 2 turbo cam and holley race sniper intake. The 5 3 is the cheapest and easiest to find so you ll see a lot of people use it.

These heads are designed specifically for truck engines such as the small bore 4 8 and 5 3 liter though they could also be useful in a 5 7 liter looking for maximum torque. All of the engines are great with a turbo but the 5 3 and 6 0 liter engines are the most popular. However the rest of the head is cnc ported to facilitate great flow. The owner jon capizzi who owns and operates capizzi automotive claims that it has slightly worked over stock 799 casting heads and it s obviously sporting a decent sized cam from the guys over at baker engineering jon attributes the success of the engine mostly to the camshaft design.

Ls6 heads are the best choice only when all out power is needed. Run with the 317 heads the modified 5 3l produced 448 hp at 6 800 rpm and 398 lb ft of torque at 5 000 rpm. After installation of the 706 heads the power jumped to 468 hp at 6 800 rpm and 413. With a 5 3 and 6 0 you can see up to 1 000 horsepower on a stock motor if you push them.