Stencils118 said:

I've read up on all these engine conversions which use P75 bottom ends, with SPI heads, is it necessary?
Couldn't you just use a p60 1242 SPI engine? or does the P75 deal more power?
Am I correct in saying the P75 1242 engines are MPI, but with the 8v head on, its a SPI? CONFUSEDDD!:bang:

Sorry if I come across as dumb, I'm really really interested and eager to 'modd' my Seicento, but I'm kinda stuck on a few things,

Thanks,,

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fingers99 said:

Not sure that the bottom end is actually stronger, but otherwise, yes.

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ycming said:

Just use the full P75 engine and splice the wire so u can connect 4 injectors instead of 1. And the standard cento ecu will run it fine!

Ming

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woj said:

What do you mean by "fine"? It will run it, period. But that is about it, "fine" is not the word I would use. Power will be far from 75-ish and the fuel will be also off (it will run unnecessarily rich).

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andys cinq said:

my conversion running the cinq ecu went thru the mot emissions with near on perfect readings for 3 years so over fueling is rubbish

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woj said:

Emissions are tested in the closed loop range, when lambda is ok this is never under or overfueled unless the mapping is waaaaaaay off making lambda past its limits. We are talking about high load high power range when the ECU is in open loop and where you want your swap-power.

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andys cinq said:

trust me mine flew and silly speeds were acheived on an airfield
i had no problems anywhere in the rev range so i still disagree with u....

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woj said:

I believe you fully, but ask yourself if it did everything it could...

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