what size down pipe to use?
what size down pipe to use? well i to the down pipe stage on my build and i am trying to decided what a size pipe to construct it from..
i am running a 5.7l ls1 with a master power t70 with a .96 a/r. i think 3.0" is to small but the turbo is 3.0" should i got 3.5"or 3.0"?
i am running a 5.7l ls1 with a master power t70 with a .96 a/r. i think 3.0" is to small but the turbo is 3.0" should i got 3.5"or 3.0"?
If the turbo is 3 inches, then 3.5 is better. 4 would be even better....The gas is as hot as we can keep it, up to the turbo housing, but after the turbo housing you want it to cool as fast as possible, because cold gas takes up less space (more dense) and therefore you can fit more in a given space. The gas seeks low pressure, which is atmosphere. The easier you make it to achieve standard pressure the better your exhuast works, and the better you clear the cylinder.
The transition from 3 to 3.5 or 4 helps disrupt the spin of the gas induced by the turbine. A divider in the exit of the turbo also stops the spin of the gas and gets it to move down the pipe rather then around and around like a flushing toilet which hurts your exhuast capable volume because it going around in circles rather then getting out the pipe straight. Like making a straight pass at the track or driving side to side, back in forth in teh lane.....which is faster.
In the end.......the best exhaust for a turbo car, is the largest that fits.
The transition from 3 to 3.5 or 4 helps disrupt the spin of the gas induced by the turbine. A divider in the exit of the turbo also stops the spin of the gas and gets it to move down the pipe rather then around and around like a flushing toilet which hurts your exhuast capable volume because it going around in circles rather then getting out the pipe straight. Like making a straight pass at the track or driving side to side, back in forth in teh lane.....which is faster.
In the end.......the best exhaust for a turbo car, is the largest that fits.
