A lot of people say Full race gets the bucks because they are full race. This is true to an extent. But they have built a reputation to earn these bucks by having top notch construction, great support and they dont just stick with a basic design. Their manifolds go through many revisions both in practice and in their designs in solidworks. These manifolds are about as good as it gets for a consumer product.
With that being said, Im not the type of person to go that far. Ill gladly leave 1% hp on the table to spend half the money (well really make it myself but that is another story). Im not a fanboy of them, but I do respect them as fabricators and engineers.
As far as pipe size. Many people love to use pipe that is too large in turbo setups, thinking they are doing good. We were building 302 ford v8 kits using 1 5/8" primaries and 2.5" crossover tubes. We decided to revise the design for many reasons to 1 1/2" primaries and 2" crossover. Guess what? on cars up to 500whp(we didnt make more than that though a customer supposedly did low 600s on revision) we did not lose top end power but we did gain rougly 3-500 rpm in peak boost from the same turbo. On some cars the decrease in time was even more dramatic.
With that being said, Im not the type of person to go that far. Ill gladly leave 1% hp on the table to spend half the money (well really make it myself but that is another story). Im not a fanboy of them, but I do respect them as fabricators and engineers.
As far as pipe size. Many people love to use pipe that is too large in turbo setups, thinking they are doing good. We were building 302 ford v8 kits using 1 5/8" primaries and 2.5" crossover tubes. We decided to revise the design for many reasons to 1 1/2" primaries and 2" crossover. Guess what? on cars up to 500whp(we didnt make more than that though a customer supposedly did low 600s on revision) we did not lose top end power but we did gain rougly 3-500 rpm in peak boost from the same turbo. On some cars the decrease in time was even more dramatic.
