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Old 18-12-2012   #1
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Question 1242cc Engines, same block?

Hey, I was talking to my friend "Zinraf" whilst we were tightening the alternator belt on his bravo 1.2 16v.

I noticed some of the block parts looked similar and that his engine is a 1242cc, which is the same as the punto 60 8v engine in my cinq, are they in essence the same block? And if so would it be possible to do a 8v/16v head conversion?

I am guessing it is not otherwise other people would do it, but you never know!

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Old 18-12-2012   #2
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Re: 1242cc Engines, same block?

i dont think its possible todo a 16v head swap

there is slight diferencces in the pistons i believe

The 8v is a safe engine, the 16v AINT

Ziggy
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Old 18-12-2012   #3
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Talking Re: 1242cc Engines, same block?

Quote Originally Posted by Ziggy122 View Post
i dont think its possible todo a 16v head swap

there is slight diferencces in the pistons i believe

The 8v is a safe engine, the 16v AINT

Ziggy
Ah ok U thought there would be something along them lines, guess im stuck with 60bhp
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Old 18-12-2012   #4
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Re: 1242cc Engines, same block?

I* haha tiny keyboard on the phone grr!
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Old 19-12-2012   #5
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Re: 1242cc Engines, same block?

If you stick a 16v head on an 8v engine, you'll have monumental valve to pistons collisions. If you put an 8v head on a 16v block you'll have compression ratio of less than 8.5:1.

Why not put a 16v engine in, complete? 1.2 or 1.4.
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Old 19-12-2012   #6
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Re: 1242cc Engines, same block?

Tempting, don't have the tools to do so though
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Old 19-12-2012   #7
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Re: 1242cc Engines, same block?

What tools do you need? Hire an engine crane for 20 a day or so.
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Old 20-12-2012   #8
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Re: 1242cc Engines, same block?

Quote Originally Posted by fingers99 View Post
What tools do you need? Hire an engine crane for 20 a day or so.
you shouldn't tempt me! We will see, it is still learning its engine map it would seem as it is running better with each drive and is pretty nippy now going for smaller wheels made a big difference too!
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Old 20-12-2012   #9
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Re: 1242cc Engines, same block?

Quote Quote:
going for smaller wheels made a big difference too!
It's not the wheels that count, but the circumference of the tyres.
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Old 20-12-2012   #10
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Re: 1242cc Engines, same block?

Quote Originally Posted by fingers99 View Post
It's not the wheels that count, but the circumference of the tyres.
True enough! All in all they wheel/tyres are smaller than it was previously on
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Old 20-12-2012   #11
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Re: 1242cc Engines, same block?

Wasn't it a fairly common mod to put the cam from the 75sx on the 60s engine? tbh its not something I have experience of but seem to remember a few people on here doing it to their mk1 puntos and getting gains. Might be something to look into before you rip its' guts out.

Edit: Looking into it a bit it depends what year your engine is if it is from before halfway through 98 apparently fitting an 866 cam would give about 5 horses...if its from after then you should have one already
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Old 20-12-2012   #12
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Re: 1242cc Engines, same block?

Wow that sounds like it might be worth a shot Don't think the engine will have been newer than that!
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Old 21-12-2012   #13
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Re: 1242cc Engines, same block?

The gains are not huge -- by far the best increase I had in power from a 1242 SPI car was from a 40mm TB and a ported Uno 45 inlet mani -- but worth having. It all adds up. In my case further experimentation was cut short by some berk in a Clio.

A P75 cam will have "866" cast into it, on one of the unmachined bits. I think there's a picture somewhere.
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Old 07-03-2013   #14
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Re: 1242cc Engines, same block?

Sorry to bring up an old, Just out of interest, Is the 1242 8v MPI engine in the grande punto (like the one I have) the same block as my cinq then? as in non interferance? If so I would feel much more confident in doing the cam belt myself
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Old 08-03-2013   #15
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Re: 1242cc Engines, same block?

All the 8v engines are non-interference.
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