Which head?

[matt_vaughan]

Going to be rebuilding my engine very soon. I have the choice of a 1200 or 1300 head. I know the 1200s flow better but do the 1300's differ any way in valve size etc. Will be doing some porting and polishing on which ever I choose anyway.

EDIT: or a C14SE head? Large valves but diff ports yes?

[novasrikev]

what engine have you got?

[AlexW]

C14SE heads have round ports.

What engine, what means of air/fuel?

[novasrikev]

C14SE heads have round ports.

What engine, what means of air/fuel?

the 1300 n engine had them dint they?

[Welsh Dan]

1200 carb and 1300 heads have cathedral ports, and are almost identical.

[matt_vaughan]

Sorry, 1200 block. Got choice of either Pierburg 1B or 2E carb. Probably therefore be using the twinchoke.

Will be Kent Cammed too.

[jimbob-mcgrew]

youll loose out on compression using the 1300 head on the 1200 block wouldnt you ?

id keep the 1200 complete with the use of a 1300 inlet manifold to house the 2e, might have to get the carb rejetted if its from a 1400.

edit : keep me informed if you go down this route, wouldnt mind doing something similar myself :thumb:

[jimbob-mcgrew]

infact.. i have a 2e carb kicking it here, and possible access to a 1400 cam, might go for it, i cant stand the auto choke on the 2e tho, will have to manual that before hand.

anyone got any idea on the carb jet size ?

[matt_vaughan]

Not sure you will have to rejet it. I have one from a 1300 so not going to bother.

However, with mine having 4 branch and Kent slapped in there, the carb will eventually become the "choking" point

I dont think compression is any different between the two heads, just wanted to know if valves were.

[jimbob-mcgrew]

mmm.. couldnt tell u for sure, but ive heard the 1300 heads have slightly bigger exhaust valves.

my 2e is from a 1400... im thinkin it might be a tad too much ? if u lived closer i'd do you a swap lol
the ignition setup will have to go with the cam, i have that allready.