Technical Engine change from 1.1 to 1.2 mulitjet

[whitepuntomk1]

Hi all
can anyone tell me if a 1.2 multijet punto mk1 n reg engine will fit into my 1.1 punto mk1 n reg i've been told all i need to do is to keep my manifold and carbrator or will the ecu and wiring need changing to
thank you

 

[fingers99]

There's no such animal as an N reg multijet 1.2.

The multijet is a deisel engine and is 1.3.

Either someone is pulling your plonker, or their head is in a twist.

Some people refer to FIAT Fire engines as SPI (Single Point Injection) or MPI (Multi Point Injection). SPI for SPI, they're a straight swap, 1.2 for 1.1. But you need the 1.2 manifold or the exhaust will not clear the sump.

The only Mk 1 MPI engine is the Punto 75. You really need the complete inlet tract (manifold and TB), ECU and code box and ignition key and complete exhaust manifold. The exhaust itself is a slightly bigger diameter.

 

[whitepuntomk1]

Hi
Thank you for the information sorry the replacement engine is a 1.2 multi point injection 75sx,

 

[fingers99]

Do-able, but difficult, as described.

If you use your old head, and put the cam out of the P75 in it, essentially you have a P60 engine which will run off your existing ECU with no re-wiring required (but a chip is a good idea). You can use your old inlet mani, but should either extend the manifold by making up a 10mm spacer (pattern it on the exhaust to manifold flange) or a simple cut, extend and weld job on the exhaust pipe, or a P60 exhaust mani.

This is a very common (and cheap) way of boosting the power in Cinqs and early Seis, so there's a lot of stuff on this in the Cinq/Sei section, probably something in the guides/FAQs, too.

Although 60bhp isn't a lot more than 55 or so, the extra torque makes the car far easier to drive and with a bit of extra work (bigger throttle body, Punto 45 inlet manifold, chip and second hand supersprint exhaust manifold) you can make it produce a lot more.

Of course, look at uprated brakes, tyres, suspension, too.

On reflection, I may be wrong about the manifold (maybe the P55 and P60 are the same length?) so check!

 

[whitepuntomk1]

Thank you fingers99 sounds good tyres suspension already upgraded, its not really worth doing engine change really for whats the car worth but have had it so long with fsh evey bit a paper work from new, ill let you know how it goes
cheers

 

[whitepuntomk1]

Hi
just to let you no punto all up and running thank you for the information great help, they replaced ecu and wiring loom placed key under steering colum so no need to change locks
thank you again
Annabelle

 

[dave]

if you have kept it mpi you best fit the 75 fuel pump too,