Tony 260Z
Club Member
Hi all, my 240 is "getting there" and attention is now on the exaust. At the moment there's a single 3" pipe leading to a chunky 300ZX backbox. It's quite fruity as you can imagine. The backbox has rotted out and I want to replace it and the centre pipe. The engine is an L28 with a modded head and cam, triple 45's and a NISMO 6-branch header (from MSA I think). Three cylinders go into each of two collectors and then there's a Y-piece to take it down to the single pipe. The car rides pretty low so I'm wondering about the practicalities of doing away with the single three inch pipe and putting a pair of two inchers running side-by-side under there instead. That could give me a bit of extra clearance underneath.
Does anyone have experience of the "twice pipes" setup from MSA? Or would I be better off going to someone like Pipecraft and having them make something up? I see that the twice pipes setup still comes out of a single pipe after the header - what would be the effect of running each three-header collector straight back without a y-piece? I'm guessing that y-piece and short length of single pipe smooths the gasflow which I assume is more efficent and therefore better for power but I don't know much about the physics, and that doesn't fit with what I've seen of cars running shortie headers or V engines where each bank has a side-exit exhaust.
Thoughts?
Does anyone have experience of the "twice pipes" setup from MSA? Or would I be better off going to someone like Pipecraft and having them make something up? I see that the twice pipes setup still comes out of a single pipe after the header - what would be the effect of running each three-header collector straight back without a y-piece? I'm guessing that y-piece and short length of single pipe smooths the gasflow which I assume is more efficent and therefore better for power but I don't know much about the physics, and that doesn't fit with what I've seen of cars running shortie headers or V engines where each bank has a side-exit exhaust.
Thoughts?