Technical 16v Bottom End 8v Head

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Technical 16v Bottom End 8v Head

Can you supply these for the 16v engine, as i might be in need of some me thinks(y)

I have the springs, got from Guy Croft.
There god for about 12500rpm!!

The 16V springs are double, I know. But a lot to small... this will not work.

I have seen a Cinq 1108cc from France with 4x40mm TB´s and 121bhp-8800rpm, so I think for a 1368cc the TB´s are fine.
 
So if I'm looking to get the best 1242 bottom end does anyone know the code I should be looking for?

I know it has been suggested it'll be on a 16v all types (I think?) & some 8v - would try wading through the ePER but both my home PC & work one won't let me on it properly @\ the moment :-(
 
The twin cam (16v) in late SuperFIRE form and the late 1242 8v both have the stiffer bottom end. You can tell by looking at the sump: on the SuperFIRE engines it's a 2 part construction in alloy rather than in steel.

A peek in J333EVO or foxyemx galleries should throw up some pics.

Here's the complete thread with lots of pics. The 8v ones have the one coil per cylinder set up and -- IIRC -- the yellow oil filler cap, too.
 
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Yeah, I think the newer ones like punto grande and 500 8v are a fair bit different, with the alloy sump, different head casting, and COP etc.

With those, the only real thing that matters is that it still has the holes for the mount on the block. I'd pressume they'd be there like on the 1.4 16v but best to check :)

Kristian
 
Yeah, I think the newer ones like punto grande and 500 8v are a fair bit different, with the alloy sump, different head casting, and COP etc.

With those, the only real thing that matters is that it still has the holes for the mount on the block. I'd pressume they'd be there like on the 1.4 16v but best to check :)

Kristian

I was considering using one of these as a donor with my existing 8v mpi head but the gaskets are significatly different. :eek:

Now know that life isn't that simple!!!
 
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The 16V buttom is stronger then the 8V.
You have stronger berings and a "reinforcement" between the berings.

The 8V head is best for tuning, it´s possible to get a lot more rpm then the 16V.

Im building a race enigne with a punto1 85 16V bottom, 1368cc crank and a punto75 head.
Until now, no probs fitting it together...

So the Punto 85 bottom matches the oil & waterways on the 75 head? I'd compared one of the newer 1242 16v gaskets & couldn't convince myself that they'd match up OK.
 
So the Punto 85 bottom matches the oil & waterways on the 75 head? I'd compared one of the newer 1242 16v gaskets & couldn't convince myself that they'd match up OK.

Gasket is no problem and 85 block and 75 block differ only as far as the mainbearin shells go. The 85 ones are prepared for the strengthening plate connecting the five main bearings.
 
Gasket is no problem and 85 block and 75 block differ only as far as the mainbearin shells go. The 85 ones are prepared for the strengthening plate connecting the five main bearings.

Ahh, thank you Peter :slayer: I've actually posted something similar on ClubFirePower but with more general info about a re-map mentioned also.

I take it that remapping a 1108 ecu using 1108 head with cam sensor & retaining knock sensor but using a 1242 bottom end should be straightforward (ie only volume changes not sensor additions/removal).
 
I have my 1368cc in bits....crank out, head off etc.


If you want any pictures or mesurements for anything...shout quickly. It may be back together on the weekend :)

Kristian

I'd love to take a look if you wouldn't mind?
You are also welcome to hand in the evenings if you'd like as I'm on earlies this week & have Saturday off for a change!!!
 
Ahh, thank you Peter :slayer: I've actually posted something similar on ClubFirePower but with more general info about a re-map mentioned also.

I take it that remapping a 1108 ecu using 1108 head with cam sensor & retaining knock sensor but using a 1242 bottom end should be straightforward (ie only volume changes not sensor additions/removal).

It is easier than doing it with a 16v conversion, which we got sorted too. It is only fueling and ignition adjusted.
 
i have a 1242 16v in bits aswell, so the same a kris, you want any info just shout

Thanks anyway but I popped over to Kristian & took a look, from what I can tell from the 8v gasket that I have when lined up on a 1368 block the oil & waterways aren't actually too bad a match - Kristian pointed out that when you know better what you are looking at the differences in holes aren't so bad, probably be to restrict & therefore vary coolant flow rate according to piston location & varied temperature.

A little more tempted to try 1368 bottom end with an 8v head now rather than stick to 1242 :devil:

It is easier than doing it with a 16v conversion, which we got sorted too. It is only fueling and ignition adjusted.

Guessed so - not sure it'll happen this summer 'cos I want reliability when taking advantage of the sun (I'm an optimist) but seeing K's I'm SO tempted!!!
 
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