1200 dellorto

[greeny89]

iv got my nova 1200 nova (CARB HEAD) running on twin 40s im thinking of puttin a 1300 crank and rods in what can i expect power wise also what do you rekon to a 1400 cam ?? any help would be mega cheers

[Balley]

Should make it around a 1400.. I would say your looking at 90-100 bhp

I would suggest at least a fast road cam.. What exhaust and that are you running?

[mk1nova_rich]

Use a Kent AST2 cam, even a brand new 1400 cam won't make a significant difference. The above power figure is about right if you make it a 1400 engine

[greeny89]

iv got a standard exhaust at the minute but that will be coming out! and il definatly be sourcing a fast road cam then! would i need to rejet the carbs ? because at the moment its seems to be flooding??

[mk1nova_rich]

what engine were the carbs previously fitted to...?! I would recommend a 4-1 exhaust manifold and a decent mild steel exhaust to make it a nice free-revving engine

[greeny89]

i think they were fitted to a 1.2 corsa but cant be sure as they wernt on the car but cant complain it still shifts when floods clear and they were only £60 and seem pretty good and the car was £50 and its pretty tidy

[mk1nova_rich]

try not to use it much until you have had them set up right...you will cause problems with too much petrol seeping past your piston rings into your oil, as well as other things. Find a local carb tuner and spend a bit of money getting them serviced and set up correctly to suit your engine and you will get a lot more power, economy and engine durability out of them :)

[greeny89]

sweet i know a bloke who is an absolute guru with 40's cheers for the advice so its a 1300 crank n rods,
fast road cam and decent manifold n exhaust

[mk1nova_rich]

yes, but get your block honed as an absolute minimum if you can as the longer stroke will increase the travel of the pistons into parts of the bore that havn't been "used". Its more ideal to have a 1300 bored out to suit the larger 12ST pistons. Also check the compression ratio after performing this conversion, it tends to be rather high so you may want to get your pistons machined to bring it down