chatting with someone on another forum regarding centos and engine swaps, and i dont have an answer for this one.

ignoring mounting it, clearence issues etc - is there any reason why the sei ECU cannot control a 1242cc 16v punto engine.

I reckon it can't, because correct me if i'm wrong a 16v unit would be a Super FIRE engine, and so too different for the ECU from a FIRE unit to control?

4 injectors so no major problem...

But then theres the timing issue, the TDC sensor might give out totally different signals (well, theyre not as expected by the Sei ECU)

I think yure right....8v MPi is fair game though

i have a low mileage 8v punto 75 mpi engine unit if hes intrested

hehe, he doesnt have a sei.. we were just discussing things in theory.

if you still have that engine in the summer dave, i may be interested. i cant afford to take my car off the road at the moment tho. (he says with it in the garage with a chewed up driveshaft)

arc said:

hehe, he doesnt have a sei.. we were just discussing things in theory.

if you still have that engine in the summer dave, i may be interested. i cant afford to take my car off the road at the moment tho. (he says with it in the garage with a chewed up driveshaft)

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you would have to swop the head if you want to put it in a spi. i might still have it in summer but it will be out of car, ATM its in the car an can be heard running.

yeah, i know re head swapping. hence can't even consider it till summer as i'd need another head, or just use mine.

even if its out the car, i trust you that it works

The major issue is the fuelling. The fuel rail on the 16V runs at ,I think, 3 bar, the cento's at less than one.

cheers

D

And rallycinq aka David wins again, yip it's all to do with fue........eh what he said.

Mark, have a trawl through the Cinqs&Seis list on Yahoo, pretty crap search function but the 16v is discussed a lot there or it was.

Liam

couldnt fueling be sorted by a bigger fuel pump, simple?

afaik, the Sei MPI has an uprated fuel pump as it has to fuel 4 injectors, not sure what pressure they run at though

arc said:

couldnt fueling be sorted by a bigger fuel pump, simple?

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From what though and where would you put it? And is the fuel pump not controlled via the ECU meaning that it still wouldn't fuel correctly.

TBSei can shed all the light but since he went for TB's I'd say he done this for ease of conversion as opposed to power gains/snazzy looks.

Liam

bloomfieldliam said:

From what though and where would you put it? And is the fuel pump not controlled via the ECU meaning that it still wouldn't fuel correctly.

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Thats what I thought....so it needs some ECU trickery to give 3 bar, cos I presume it finds its limits by referring to values held in its (the ECU's Microcontroller) memory.

If it's any use, the Punto 75 runs at 2.5 - 3.5 bar depending on year - I'd think the MPI sei would too - but this is really just a guess.

Could you put a 1242 16v in an MPI Sei?

Well, you can do a 1242 8v MPI - the standard ECU handles the fuelling ok and you can use the standard inlet manifold.

16v is completely different wiring loom though - so plugging it in might be tricky!

Throttle Bodies were always part of the plan for mine - something different and I wanted to get as far about 100bhp with a normally aspirated engine as I could.

In my case I went for a DTA ECU with an ETB digi-dash.

With standard manifold you'd probably need to run the 16v ECU - but you may have problems integrating the Engine loom with the Car loom.

The guys are right about fuelling - it seems most of the fuel pumps (bar the Punto GT) are basically the same size and shape, but with different performance, so upgrading the fuel pump shouldn't be too difficult - I run a Punto 16v fuel pump in mine.