1.2 head on 1.3 block?

[John]

I've searched, and have not been able to find anything concrete. (i think i've personally asked before, but couldn't find it Lol)

Right, i have a good 1.3, with a fooked head (looks like its been skimmed with an angle grinder), and i also have a very good 1.2 with the same cathederal shaped ports. Will it fit ok on the 1.3 block, i presume i use the 1.3 gasket?
Also I'm planning on fitting a weber, and possibly some sort of better cam, is the 1.4 cam better than the 1.2/3?. Will it be ok to use with with the block/head combo?
Any help greatly appreciated!

[Welsh Dan]

The 1.4 carbed cam is better than the 1.2/1.3 ones, but has a different distributer drive on the end of it.

[John]

Thanks dan, so the 1.2 dizzy won't fit the 1.4 cam at all then? which other cam could i use instead?

[General Baxter]

it will have to be a 1.3, aftermarket (have both drives), or change the ignition system to a 1.4 set up

[John]

How about a 16sv cam? i know the 1.2 dizzy deffo fits this.

[Novasport]

Is this for your 1.2 GL? If so, use the 1.3 crank and rods with the original 1.2 block and pistons(I take it ts a 12ST) to create a 1.4.

[matt_vaughan]

How about a 16sv cam? i know the 1.2 dizzy deffo fits this.

That would be quite interesting. Rekon there's got to be plenty more lift than a 1.2 cam.

Apparently a 1.3 cam on a 1.2 gives around 5 bhp increase, so 16SV cam may be somewhere around there.

[John]

Is this for your 1.2 GL? If so, use the 1.3 crank and rods with the original 1.2 block and pistons(I take it ts a 12ST) to create a 1.4.

Yeah, will be downsizing if i keep it Lol. So are the 1.2/3 pistons the same do you know? Yeah its originally a 1.2st.

[mowgli]

Yeah, will be downsizing if i keep it Lol. So are the 1.2/3 pistons the same do you know? Yeah its originally a 1.2st.

the 1.3 is large stroke, small bore
the 1.2 is short stroke, large bore.

a 1.4 made this way has a 1.2 engine no. & every other part is interchangeable

the 1.2 & 1.3 heads are identical....

I did a 1.4 conversion in 1991 & it went very quickly. even on a 1.2 carb & inlet. but I did get the piston dishes machined down to give a reasonable compression ratio

[John]

So i use the 1.2st block, 1.3 pistons rods and crank, 1.2 head? Sounds tempting!