1.4 head work

[lj]

just fitted a 1.4 engine in my nova, i have a set of 40's from the nova sport to go on it, the lad i got them from tells me that the 1.4 head has square inlet ports whilst the inlet manifold is oval? is this ture and whats the best way to solve it....get a 1.3 head? new manifold or simply match them as much as poss?

[Stuart]

1.4 sri head with a 1.6gte/gsi inlet...

[womble sri]

the inlet is most likely for the mpi head which are generally better because of bigger valves i think, stuart will know, so get one of them i am using one and it is a lot better then the sr head but before you go putting it together get a cam trust me.:)

[lj]

so its best to get a gsi twin carb inlet?

[Stuart]

if you fit a SRI/GSI/GTE head then yes, but if you fit a 1.2(carb)/1.3 head then its a sport/1.2 inlet that you need.

[lj]

i 've got a 1.4 from an astra estate... the exhaust manifold was alittle tight to get on then later found out that is not correct for the engine as the studs are a little wider apart according to a mate... but it fits and don't blow so alls good i guess...

is the nova sr 1.4 any different on the engine or is it just a case of different cam?


just wanna get my carbs on and have fun... so as so as i know what manifold i need i'll crack on with it....

if my head is square holes and the inlet is oval can i have them matched?

[Stuart]

its easier to sell yoru oval ported manifold and to buy a square port one...

[lj]

won't cost me a pennie having the oval one made to match... will doing this work?

[Stuart]

not really, it will need welding up first.....

for the effort involved sell and buy the right one to save fcuking about really

[chris gsi]

i put twin 40s on my 1.4 sr and swaped the head to a 1.3 sr one as the round ports were better

[novatek]

i think the square ports are from carb engines arent they. so if you got a head from a mpi engine then you will be able to mach the oval ports

[Adam]

1.2i, 1.4i, 1.4SR, most 1.6 carb engines have square port heads.
SRI/GTE/GSi have round ports.

[mikey14sr]

1.2 and 1.3 carb heads have cathedral shape ports, thats what the origional sport manifold was designed to fit. After-market manifolds are available in all three designs, but the 1.4/1.6 injection heads are the best of the standard bunch, therefore you're best off with one of these, along with a decent camshaft.

[lj]

i've got a 1.4 carb...


think i'm gonna get a big valved 1.3 head. what ya think?

[mikey14sr]

A worked-on 1.3 head would be ideal if you can afford it, to make the most of it a 270 to 290 degree cam aswell. Be carefull not to have the head skimmed too much though as the increase in compression ratio could be too high.

[lj]

just looked at my head and the inlet manifold is a square type one with rounded top....i guess this is the cathedral shape... will my 1.4 carb engine be the same?


yes no ansa please!

[Stuart]

No