possible carb / head upgrades

[jimbob-mcgrew]

ive got a standard 1.2 on a pierburg 1 carb, have access to some parts from a 1.4 carb:- head, inlet, pierburg 2, dizzy & coil. someone gave me the idea that i should put the 1.4 inlet and carb onto the 1.2, but then i mentioned about the square ports, then he said i should grind out the ports to match the inlet to head, can this be done i wonder, as the square ports are long and thin arent they ? also im guessing the valves are bigger on the 1.4 head, how much would it cost me to get it skimmed to bring back the compression ratio, i might use the whole lot if its worth while ? also, would i benefit from using the c.b dizzy and coil compared to the breakerless ignition ive currently got on the 1.2 ? what do you guys think. cheers for any replys.

[Welsh Dan]

I'd fit the 1.4 cam, ignition and carb, but use a 1.3 inlet as it'll have the right ports on both ends.

Do you use the stock 1.2 exhaust manifold and downpipe? If so fit the 1.4 items aswell if you can.

[jimbob-mcgrew]

cheers dan :thumb:, head not worth bothering with is it ? on the exhaust front.. yeh standard manifold at the mo.. but i have a better 4-1 kicking about thats going on in future. about the cam, i think its abit worn, but hopefully not too bad, still worth doing ? and are they easy to change, can i just slide the 1.2 out and slide 1.4 in. bar gaskets and a cam belt, do i need anything else for the conversion ? one more thing i forgot, the pierburg 2 has an auto choke which i dont want, will the manual choke gubbins of my pierburg 1 fit on it ?

[Welsh Dan]

It is possible to fit a manual choke to the 2e3 as far as I can remember. The head has marginally bigger valves iirc, but the tiny ports negate any benefits. A worn 1.4 cam will be better than an equally worn 1.2 cam, it just depends on how worn they both are - get the vernier caliper out. You can slide one cam in and one out, Adam did a guide in the tutorials section iirc.

You may aswell change the waterpump aswell if you're changing the cambelt.

[jimbob-mcgrew]

thanks man, been helpfull :)