Tuning Stilo hybrid engine?

[MarkThompson4]

How's it going folks, I'm normally around the Stilo section but I thought I'd come here as yous will probably be more experienced when it comes to this

I have a 1.2 Stilo, I need to replace the head gasket and have weighing up my options as to what I can do whilst the head is off. I was maybe going to fit the Stilo 1.4 engine but I've recently heard that I can swap bottom ends with a 1.4 and get around 100bhp with standard 1.2 ecu map. Is this really the case? Isn't the bore of the cylinder bigger on the 1.4?

I would like to try this! Is it straight forward or is there a fair amount of work involved in swapping the blocks? I don't see any practicalities in trying to lug a 1.4 engine in my boot over to a garage for them to do it all??

I have a straight through exhaust, 4-2-1 decat manifold and induction kit on my 1.2, what sort of gains could I get if I swap the blocks? Ive read of 115bhp being achieved with the standard 1.4 engine with induction kit? Also what if I port/ polish the 1.2 head before swapping?

Cheers for any advice

Mark

 

[blu73]

1.4 bottom end will mate to a 1.2 head no problem. the difference in capacity is a taller block and longer throw on the crank..

i'm no good at ecu stuff really but i would imagine the 1.2 ecu would run it well enough for normal use.

 

[cc1]

I would sort out the engine and keep it standard. Sell the car and buy a 1.4 stilo. It makes alot of things simpler.

 

[MarkThompson4]

No thanks. I've already done a lot to the one I've got, both to get it running good till now and have upgraded a lot of the interior and exterior. A lot of work I've put into it already - it's better spec'd and not much slower than a 1.4. Buying a standard 1.4 Stilo would be a step down for me. Tbh it's only really a rocker cover gasket and thermostat it needs but the head gasket may as well get done too. A standard 1.4 has 95bhp so doing this swap would (if what previous threads suggest) give more power than a standard 1.4. It just wouldn't make sense to sell up. Thanks for the suggestions though, I've seen 1.4 engines on eBay for 3-400 so I'm going to start collecting parts (new gaskets, water pump, belt kit etc) and hopefully get an engine to give it a shot in April or May.

I'm still young and need something to keep me busy and burn cash on

Anyone got figures for cam'd and remapped 1.4s? Just to form a basis of what I could achieve?