M3 exhaust on a 325i - lambda sensor question
Discussion
Has anyone done this?
I've been able to compare the manifolds and they will both bolt on to each other's head studs, the only problem is the pipes finish in different places so the easiest thing to do is use the complete exhaust system from the M3: manifolds, cat centre section and rear box. As you'd expect the M3 setup has much free-er flowing manifolds and larger diameter pipes all the way through so should provide a bit more power especially at the top of the rev range.
The only problem is on the 325i the pipes join just before the cats for the single lambda sensor to plug in, on the M3 there are 2 lambda sensors as the setup is 2 separate pipes all the way through. What would happen if I was to run it with just one lambda sensor and blank the other plug off? Would the engine run properly?
Thanks for your help.
I've been able to compare the manifolds and they will both bolt on to each other's head studs, the only problem is the pipes finish in different places so the easiest thing to do is use the complete exhaust system from the M3: manifolds, cat centre section and rear box. As you'd expect the M3 setup has much free-er flowing manifolds and larger diameter pipes all the way through so should provide a bit more power especially at the top of the rev range.
The only problem is on the 325i the pipes join just before the cats for the single lambda sensor to plug in, on the M3 there are 2 lambda sensors as the setup is 2 separate pipes all the way through. What would happen if I was to run it with just one lambda sensor and blank the other plug off? Would the engine run properly?
Thanks for your help.
E30M3SE said:
Should not be a problem, as the ECU is looking for one reading and it is still receiving one reading.
So it doesn't matter what the other 3 cylinders get up to then? I suppose the car only has on throttle body so if 3 cylinders are correct then the other 3 won't be far off.Gassing Station | BMW General | Top of Page | What's New | My Stuff