Amazon: Damaged JFUR4 distributor

[Burdekin]

Originally Posted by HRA

Thanks Burdekin - it's good to hear that the -2SE should be plug-and-play. Do you have any advice on needles? B2AF and B1AN are the specified needles for the B20A but different sites contradict each other when it comes to dates. I can't even be sure which is the earlier needle.

I also wonder why they changed the needle for this engine? If it was to cure a problem then I want the later one. But if the later needle was a compromise to get around emissions legislation then an early one sounds a better bet.

The B20A needles are B1AN and B1CC.

http://zenithcarb.co.uk/carbspec/car...pares/id/4400/

[HRA]

Originally Posted by Burdekin

The B20A needles are B1AN and B1CC.

http://zenithcarb.co.uk/carbspec/car...pares/id/4400/

I'd not heard of the B1CC for the 2 litre Amazon.

My Haynes manual says B2AF.

The 1969 Volvo Service Manual also says B2AF.

CVI automotive sell B2AF for B20A engines made in 1969, B1AN for 1970 engines and B1CC undated.

Scandcar sell B2AF for B20 engines up to 1970

Classic Volvo Restoration in the States sell B1AN for B20A engines 1970-72

I feel like the man with multiple watches who never quite knows what time it is!

All three needles are similar at the wide end but narrower half is different in each case. B1CC is leaner, B1AN is in the middle and B2AF is richer. What I don't know is if the differences are really significant. I've attached some graphs showing the differences - needle diameters at 12 sections, all in inches.

I'm tempted to apply the Goldilocks principle and go for the one in the middle!

[Burdekin]

Speak with someone at Burlens they are probably your best bet.

[Burdekin]

Thought I’d have a look at the needles in the booklet, there is minimal difference in the B1CC and B1AN, see pics.