Which jets?? - Alfa Romeo Forum
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Which jets??

Afternoon gents, I once again have a question

I will soon be putting a 1.6 engine into my 33 but I'll be using the dellortos from the old engine which is a 1.3, I'm going to order a refurb kit off ebay but I understand I will also need to re-jet the carbs to suit the bigger capacity 1.6. question is, which jets?

I had a quick look here: Dellorto and weber carburettors online

and I'm none the wiser would I be right in assuming I only need to replace the main jet or do I need to change the idle and c hoke jet too?

Any advice welcome!
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You will need to have the car put on a rolling road so it can be set up properly, as you are putting in a non standard size engine and you have no guidelines to follow.

You will probably have to change most of the following: main jets, idle jets, pump jets, venturies, emulsion tubes.
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Lol, rolling road! My effort will be a bit a more of a home brewed affair I think once I have the carbs jetted right and balanced, and the timing belts changed and checked It'll be close enough for me.
I should mention its a 1.6 boxer from a 145 so once the electronic crap has been binned it should be pretty straightforward (famous last words!)
Just wasnt sure about re-jetting, thanks for the advice
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Jim I have jetting info somewhere. I'll dig it up for you. When I rejetted, I changed the chokes, idle and main jets. About 6 months later I changed the emulsion tubes to clear an lean spot in the rpm range when on light throttle. a lot of the jets for the 1.5 and 1.7 are the same size so it won't be too hard to dial in the 1.6

Found it:

Last edited by Fluffyduff; 29-05-11 at 10:20.
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