does anyone know of a way around replacing the mpi seicento manifold fr a supersprint type cus its got the cat built in so id be killing two birds with one stone

been done, need custom pipe from bottom of manifold to join up with system, and either wiring extention for lambda or welding on a new sensor point, would only use one of the sensors resulting in warning light on but to no harm (could always weld in a second sensor point for second sensor if you fancy?)

im confused now!!!!

i think i get the part about welding new lambda sensor nut in the manifold, but is the other option to just cut the post cat lambda off?? this wud throe up an ecu fault light and the car wud probably run terrible wudnt it??

when you say a modified bottom pipe do you mean because the new manifold has a flange, whereas the original mip system doesnt??

pls ghost, help me to understand lol

the earlier non MPI sei is a lot easier and better to tune.check out 600M sometime.

MintySport said:

im confused now!!!!

i think i get the part about welding new lambda sensor nut in the manifold, but is the other option to just cut the post cat lambda off?? this wud throe up an ecu fault light and the car wud probably run terrible wudnt it??

when you say a modified bottom pipe do you mean because the new manifold has a flange, whereas the original mip system doesnt??

pls ghost, help me to understand lol

Click to expand...

Yeah the other option is to bin the second lambda but this would give you the fault light but would not cause any adverse running problems

modified downpipe would be because the centre pipe would not reach the end of the manifold/downpipe (all in one i think anyway) just need a exhaust pipe to join them up

any other q's shoot mate

sumplug said:

the earlier non MPI sei is a lot easier and better to tune.check out 600M sometime.

Click to expand...

Original 600M's (aka before they got fixed so they were actually driveable) were extremely over-rated and over priced for what they produced, and if you ask anyone who knows their cento's this will be confirmed.

re the spi better than mpi, just because there is more availiable doesnt mean its any worse to modify. heck im a spi man (4 cinqs now) but when i got my sei i decided i wanted mpi. and also my mpi sei which was engine wise standard other than CDA had no problems keeping up with some pretty modified spi 1108's on clubcento IoM trip, out of the box it is alot smoother and doesnt suffer from the dreaded flat spot in my experience. also pulls a bit better at higher revs/speed.

but this is a manifold thread and going off topic very quickly. it was not a question of which is easier/better to tune (easy answer spi - correct answer both equally.) it was a question of how to fit a supersprint manifold to the mpi as such we should keep it to that subject at least until the purpose of this thread is served.

Cheers,

Cool!
This plan is also on my drawing board. Think your car will run worser without the second labda plugged in. My plan therefore is to start with a SMT6 and let the ECU think that there is a labda while there isn't one at all.