1.2 MK1 Head Replaced with 1.4 Sr MK2 Head?

[ive_had_a_novadose]

Is this a straight swap im looking at swapping the 1.4 Sr head,cam, dizzy, ignition coil,fuel pump (mech),the exhaust downpipe, and maybe inlet manifold

could all this be a straight swap onto a 1.2 engine? and would i get a fair amount of power from all this? as i have all these parts at a mates house for free

[Adam]

You'll loose power.

[ive_had_a_novadose]

why would i loose power? ive heard on here somewere that the cam is quite good?

[Jon_nova1]

yes but the head isn't, put all the stuff you want into the 1.2 head

[Jon_nova1]

oh and either keep the 1.2 inlet, as you have no carb to put on the 1.4 inlet, or get a 1.4 carb and put it on a 1.3 inlet

[ive_had_a_novadose]

oh ok then so if i put the cam in the 1.2 head that would be fine? and also would it make a difference if any to add the fuel pump dizzy and ign coil?

[ive_had_a_novadose]

ok then mate ill be on the hunt for a 1.3 inlet but if the 1.4 carb was on wouldnt it be overfueling the engine because its for a 1.4 engine?

[Jon_nova1]

it may be hard fitting the 1.4 dizzy for a 1.2, the fuel pump wont make much difference i wouldn't have thought, the ignition coil may give you a better spark

[ive_had_a_novadose]

trial and error then with the dizzy but thanks anyway mate the reason why the 1.4 ign coil would be good is that im instaling the 6 dial clocks from the sr which has a rev counter and i hate not having a rev counter could someone tell me how to wire the rev counter up?? i know its a different subject than the title but any help would be good

[Adam]

Keep with the 1.2 coil/dizzy, and fuel pump(which is same as 1.4 one).
The only thing worth fitting is a 1.4sr cam, even that wont give much gain tho.
The 1.4 exhaust manifold and downpipe would help too, but you'd then need a complete 1.4 exhaust system.

You could fit a 1.3 carb inlet, and a 1.3 carb, as thats a twin choke carb.

The reason for power loss is your taking a highish compression 1.2 head, with quite well flowing large ports, and replacing it with lower compression ****e port 1.4 head. Just because the head comes off a bigger engine doesn't always mean it will give a smaller engine more power