quote:

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Originally posted by L885 1.28v
what difference does it make putting a mpi head on it then? could you also put a mild cam in the mpi head and get a decent power increase???

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if you dont change the pistons, the compression ration will be lower & cause the engine not to run as well as it should as its N/A & not forced induction.

what difference does it make putting a mpi head on it then? could you also put a mild cam in the mpi head and get a decent power increase???

:thumbs:

I wana build an 8v on carbs - then get shut of the ECU :lol:

quote:

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Originally posted by PaulW
must be something with the ports :boggle: duno...

still it sounded 'different' when it was done :lol:

i want another corsa with an 8v engine :( there sooo nice to work on!

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must be something with the ports :boggle: duno...

still it sounded 'different' when it was done :lol:

i want another corsa with an 8v engine :( there sooo nice to work on!

my SRi's lumpy when cold anyway :|

i used a 1.4sri 8v head on my SPi engine, kinda helped torque a bit & top-end power, but was still running the SPi setup... :|

only main issue i had was it ran a bit lumpy when cold with the sri head

The head design is also different, in the ports and valves are larger.

You'd need
Head
Cam
inlet manifold
Exhaust manifold
Loom
DIS pack
Fuel pump
Also if the engine Spi doesn't have a crank sensor then you'd need
oil pump
crank sensor
Crank pulley

so just swap the engines over :)

compression ratio of the SPi is lower than the MPi so the pistons are different... the poskets are deeper on the SPi to lower the compression.

SPi - 9.5:1
MPi - 10:1 or around that

[Edited on 25-11-2004 by PaulW]

do a search it's been posted millions of time.
There's a lot to it, it's just easier to swap the whole engine.

Get full head and manifolds off the mpi, and the pump, fuel connectors etc.

Pistons may be different though :thumbs:

an inlet maybe?

Fuel pump, injectors, as far as i know.

a 1.4 spi to a 1.4 mpi
how much and is it worth it