Personally I like 4-1 design better.
When thinking about a header thinh 4-2-1 Mid range power gains (Great for V-Tec's who have dick squat for torque, especially down low before V-tec kicks in) HOWever the FS DE actually make pretty decent Torque, but dooesnt briing it super high in the rpm's (because of no V-tec) to make as much hp out of that torquue thhat a V-Tec would. Soo because we have no lack of low end torque, improvements in the top end will be more benificial.
4-2-1 design doesnt make more power then 4-1, 4-1 makes more power and makes its gains higher up in the rpm's (Thats how) at the sacrafice of a few ponies down low. 4-2-1 design makes less power gains, & it makes its gains more twords the mid range, however it doesnt have as much of a hurt on the low end.
4-1 flow more as the nature of the design (Only going through 1 set of colectors as aposed to 3) Understand how the torque curve works, all before peak is where the cylinders have more then enough time to fill, increase flow and this will move the peak higher in the rpm's, efectively giving you more power at higher rpms but too much flow in the lower end.
Fortunatly when accelerating hard the rpms dont usually drop to below the torque peak (Or not much below, remember we are NOT talking about the hp)
Unfortuanatly if your auto X'ing on tight short tracks iit migh have you a little boggie, however...
When putting in 4-1 headers, its good to accompany it with a UDP, to ballence it out a bit, that should take care of any down low losses and bogginess.
In the end the 4-1's will generate more Power (Peak)
When thinking about a header thinh 4-2-1 Mid range power gains (Great for V-Tec's who have dick squat for torque, especially down low before V-tec kicks in) HOWever the FS DE actually make pretty decent Torque, but dooesnt briing it super high in the rpm's (because of no V-tec) to make as much hp out of that torquue thhat a V-Tec would. Soo because we have no lack of low end torque, improvements in the top end will be more benificial.
4-2-1 design doesnt make more power then 4-1, 4-1 makes more power and makes its gains higher up in the rpm's (Thats how) at the sacrafice of a few ponies down low. 4-2-1 design makes less power gains, & it makes its gains more twords the mid range, however it doesnt have as much of a hurt on the low end.
4-1 flow more as the nature of the design (Only going through 1 set of colectors as aposed to 3) Understand how the torque curve works, all before peak is where the cylinders have more then enough time to fill, increase flow and this will move the peak higher in the rpm's, efectively giving you more power at higher rpms but too much flow in the lower end.
Fortunatly when accelerating hard the rpms dont usually drop to below the torque peak (Or not much below, remember we are NOT talking about the hp)
Unfortuanatly if your auto X'ing on tight short tracks iit migh have you a little boggie, however...
When putting in 4-1 headers, its good to accompany it with a UDP, to ballence it out a bit, that should take care of any down low losses and bogginess.
In the end the 4-1's will generate more Power (Peak)