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Tuning Punto 75 head in a cento?

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Tuning Punto 75 head in a cento?

Give this guy a break, he is a new member, new blood to the cinquecento community in the UK. This isn't a growing community anymore as the number of cinq / sei is dieing. I much rather seeing an extra post about an age old problem than putting new people off.

I understand the annoyance of answering the same question over and over again, and when i couldn't be bother answering the same stuff again i just don't bother.

As for the P75 questions, not something i done, but from reading about your plans. I would get it running with the standard P75 ECU first. You don't need a piggy back right away, see how it runs first.

Also you may need to get that ECU virginsed or have the immob removed, you need to contact a member on here for reddy4bed, he did my 16v ecu for around £45 i think.

Is all about learning before you throw loads of money at it !

Thanks
Ming
 
NeilVox Ok, I have some advice for you and you may want to listen as I have an MPi Sei and it has a P75 engine fitted, in a fashion, Don't do it! just fit a 16v, with out going to great expense you wont get it running right. Please I am trying to give you solid advice here.


The issues come from the PowerSteering as it takes reading from the ECU for speed due to it being speed Variable, now with that in mind the only option you have is to piggy back the P75 ECU onto the Stock Micro ECU, or go full Stand-alone, if you run the P75 Piggy Back you will need to cut and splice the cars loom and a P75 loom together so it can be run, now if you run the 1.1 engine with the 75 head then you will only see a gain of about 5-10 bhp but you will need to modify the loom as none of the plugs for the Sei loom will reach to where the sensors are, if I remember right there is also an issue with the fuel lines too but I think that's easy fixed.


Now you could in theory run on the stock ECU with the 75 head and plastic inlet but again, this is the set-up I am currently running and it Dyno'd with the 1242 block at 69bhp, I had better out of my old 1.1spi.


Now with all this that you are looking at, look into a 16v conversion, its a lot easier and the gains are bigger.


If you are like me and want to stay 8v then I will actually help you how I can as I HAVE done this conversion but knowing it I really wouldn't recommend it and would strongly recommend a 16v conversion instead.
 
mariocinq said:
The issues come from the PowerSteering as it takes reading from the ECU for speed due to it being speed Variable.
Click to expand...
Not true. The power steering Ecu takes a direct input from the speed sensor.

The Mpi Ecu's can be fussy about tuning. My MF59 did not like an 866 Cam in the 1.1, so a full 75 engine setup would probably have it spit out the dummy?
I also agree about considering the 1.2 16v. For the money, time and effort on my 1.2 8v, I wish I would have gone for the 1.2/1.4 16v or turbo 1.1.
 
Last edited:
mariocinq said:
NeilVox Ok, I have some advice for you and you may want to listen as I have an MPi Sei and it has a P75 engine fitted, in a fashion, Don't do it! just fit a 16v, with out going to great expense you wont get it running right. Please I am trying to give you solid advice here.


The issues come from the PowerSteering as it takes reading from the ECU for speed due to it being speed Variable, now with that in mind the only option you have is to piggy back the P75 ECU onto the Stock Micro ECU, or go full Stand-alone, if you run the P75 Piggy Back you will need to cut and splice the cars loom and a P75 loom together so it can be run, now if you run the 1.1 engine with the 75 head then you will only see a gain of about 5-10 bhp but you will need to modify the loom as none of the plugs for the Sei loom will reach to where the sensors are, if I remember right there is also an issue with the fuel lines too but I think that's easy fixed.


Now you could in theory run on the stock ECU with the 75 head and plastic inlet but again, this is the set-up I am currently running and it Dyno'd with the 1242 block at 69bhp, I had better out of my old 1.1spi.


Now with all this that you are looking at, look into a 16v conversion, its a lot easier and the gains are bigger.


If you are like me and want to stay 8v then I will actually help you how I can as I HAVE done this conversion but knowing it I really wouldn't recommend it and would strongly recommend a 16v conversion instead.
Click to expand...

Is not possible to just wire the P75 ECU into a MPI car?

I mean, you could a 16v ECU to a cento. Or has this not been done before?

Thanks
Ming
 
ycming said:
Is not possible to just wire the P75 ECU into a MPI car?

I mean, you could a 16v ECU to a cento. Or has this not been done before?

Thanks
Ming
Click to expand...

You could but it's a total rewire of the engine bay due to the fact the plugs differ on the ecu and the bulk head, because of this it's a total pain in the arse to do and easier to either do a standalone or swap to a 16v as it's about as much of a pain but still has more power, I wish I had never started on my route but i have so I will see it through to the end.
 
As stated in the PM, the Micro ECU doesn't seem to be able to be Re-mapped, look at all the good running 16v's, they all run either the Earlier Big style ECU or Standalone, you can run the modern Micro ECU like Ming is but it cant be re-mapped I believe, this is where the issue lies with the MPi set-up as it has the Stupid Micro set-up.
 
I could be wrong, but if he is then its the same as what I did in my Mk1 16v and its just a simple case of EPROM Chip, plug and play which is the same as the SPI ECU's and the 75 ECU.
 
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