Lancia Beta Forum

I'm looking for a bit of a starting point for the jetting of a 40dcnf on a Volumex. I've fitted the carburetor and got the car running pretty well but it sounds like it's pinking slightly accelerating from lowish revs. It didn't do this on the original carb so I'm thinking that the timing is OK.
I've just installed an AFR gauge so should be able to get the mixture right but don't know what size chokes and jets I should be starting with just to get a head start.
I've seen a post on here that listed the jets that is a good starting point but I'll be dammed if I can find it now I need it.
Can somebody point me in the right direction?

This is listed in Guy Crofts first book which I seem to have hidden well in my house move! Hopefully someone who can actually find it will share it with you. You will want to go to a Rolling Road to set it up properly.

Eric 

Thanks Eric, I've been looking for a copy of Guy's book but so far not much look. As you say hopefully someone has a copy and reads this post and let's me know the recommended starting position.

You mean this?

Mark

Hi Mark, yes that's the sort of thing, however I don't see the Volumex on there and it's only 1 40 DCNF not 2.

There isn't anything else I can see in my edition of the book that discusses carburation on a vx other than the extracts below.

Hope they help.

Mark

Are you using the standard inlet cam or have you changed it? Many folk have fitted a standard 2 litre inlet camshaft or a fiat 130tc one, this will in theory make a decent difference. The choke needs to be relatively small, around 28mm, that is what I have on mine but it's yet to be tested in anger but it seems to run well out of the car.

I have a 2.0 ie  camshaft, just waiting for vernier pulleys.

Thanks Mark that's good.