Technical MPI Cinquecento

[fatty]

I seem to be asking a lot of questions haha.....

Anyway, What is the easiest way to convert a Cinq to MPI? Can the Late Seicento Sporting Loom be used? I'm thinking specifically in regard to using a Punto 75 engine.

If I get the whole loom from a Seicento MPI and the engine and ECU from a Punto 75 will these work together?

 

[Rosso83]

There are a few other little issues, one to do with fueling i believe. Someone with more knowledge will certainly explain.

 

[Oldschool]

I seem to be asking a lot of questions haha.....

Anyway, What is the easiest way to convert a Cinq to MPI? Can the Late Seicento Sporting Loom be used? I'm thinking specifically in regard to using a Punto 75 engine.

If I get the whole loom from a Seicento MPI and the engine and ECU from a Punto 75 will these work together?

The short answer is: No

Just get the engine in, splice the 4 injectors into the loom and have the car mapped for the 75. But don't forget to change the fuel pump to 3 bars and make sure that everything is ready for the higher pressure.

 

[fingers99]

An alternative is to go Megasquirt.

Although the heads on Punto 75 and Sei MPI are the same, the Sei uses all manner of stuff that the 75 doesn't. like sequential injection and a knock sensor. It'd be a real pain to merge the two, and as there's no performance advantage.......

 

[Oldschool]

The Seicento MPI is not sequential.

 

[fingers99]

The Seicento MPI is not sequential.

It must be semi sequential, or what's the cam sensor for?

 

[SuicideUK]

I'm sure rallycinq said something about the mpi being sequential with 2 cylinders firing at a time.

Luke.

 

[rallycinq]

I'm sure rallycinq said something about the mpi being sequential with 2 cylinders firing at a time.

Luke.

Nope, thats the wasted spark ignition system, something entirely different.

Cheers

D

 

[SuicideUK]

Thanks for clearing that up, I'm learning I guess.

Luke.

 

[arc]

Just get the engine in, splice the 4 injectors into the loom and have the car mapped for the 75. But don't forget to change the fuel pump to 3 bars and make sure that everything is ready for the higher pressure.

wouldn't do this. mapping the stock ECU to do this is not cheap, and ultimately a bodge especially considering we're talking about a turbo engine here.

bin the stock ECU and fit an aftermarket system.

Not sure why the cam phase sensor is there if the injection is not sequntial.

 

[fingers99]

Are we talking about a turbo engine? If so, bin, bag or sell the stock ECU. Go aftermarket. Chances are it won't cost that more than a re-map and it will be able to do the job properly.

I just can't see how you'd realistically control fuelling and ignition on boost any other way, let alone build in any sensible safety features (retard on knock isn't a sane option on a turbo motor).

 

[arc]

Are we talking about a turbo engine?

not sure now. i get confused with who has what car now.

 

[Oldschool]

not sure now. i get confused with who has what car now.

As long as you know what car you have got you don#t need to worry.