1.4 head on a 1.3. Anyone done it?

[Jonesfach]

Anyone out their done this or know that is feasible?

thoughts much appreciated.

have got one to hand and thinking of putting onto a 1.3 with twin 40 dcoes.

[Stuart]

Tbh the 1300head in std form would be better than the 1400head, unless its an Sri head

[Jonesfach]

Tbh the 1300head in std form would be better than the 1400head, unless its an Sri head
I have a 1.4 head that has had bigger valves in it and been ported. The original 1.3 head on the car is pretty much standard.

[Stuart]

Furry muffs, should be better than the 1300 head. You'll need a square port inlet

[Jonesfach]

Furry muffs, should be better than the 1300 head. You'll need a square port inlet
Out of interest do you know the difference between a 1.2 and 1.3 valve sizes apart??
thanks for your replies Stuart..

[Stuart]

iirc there are no valve size changes between 1.2 and 1.3. Willing to be proved wrong though.

[Royston]

iirc there are no valve size changes between 1.2 and 1.3. Willing to be proved wrong though.

They are the same size, early 1.2 head has a slightly less combustion chamber size than the 1.3, have a look at my thread below


http://www.pngclub.com/forum/showthread.php?209643-OHC-8V-1300-to-1400-Engine-conversion-Looking-for-info&highlight=

[Jonesfach]

So you can stick a 1.2 head on as a straight replacement to up compression hence performance increased a little! Interesting! A good cheap upgrade if funds are tight.

did think standard valves were bigger on a 1.3 myself, but they are the same...

[Royston]

IIRC

Cathederal port 1.2/1.3 head

inlet 33mm
ex 29mm

Later heads I believe are
inlet 38mm
ex 31mm

[Royston]

I could CC a 1.4 head if anyone could load me one to measure......