boring 1400engine HELP....

[greg1.4]

i am really needing to do some engine mods to get my 1400 spi nova over 1400cc. I have a few ideas but need some help.

I am thinking about boring it out over a 1400cc but then what problems do i come across? Whats the first oversize i can bore it out to without changing pistons etc? Can i get away with boring it slightly and not doing any other mods?I just need it slightly over 1400cc.

If i done this i would stick my 1300 sr head onto the 1400spi engine but then what carb would i need to use to make it run? do i use the sr carb or the spi carb? what about fuel pipes/pumps etc? I need help soon please!

[tom_beverley]

By putting the 1300 head on it will probably mess up your compression ratio, may be wrong though.

If you can run the 1300 head then get a 1300 inlet and Weber 32/34DMTL twin choke carb.

The later, I'm selling if you want one?

Would need a pressure regulator to govern the fuel pressure down to acceptable levels for the carb or you will have to change fuel tank over to a carb one.

Or find an Irmscher Injection System!

Tom

[Adam]

If you fit a 1300 head use a 1300carb inlet, and a std sr carb/weber 32/34.

If you bore the bottom end you will need oversize pistons.

[greg1.4]

can i get cheap oversize pistons? what is the first oversize for boring?what other mods could i do to bring it from 1398cc or whatever it is to slightly over 1400cc?

[Stuart]

why do you want it slightly over 1400cc? the overbore on its own wont really add much power as such

[Adam]

Im guessing to run it in a rally etc class with a regulation for over 1400cc engine?

[greg1.4]

yes! just excactly.lol

[Adam]

Fit a 1600 then,Lol