Thread: Amazon: - Damaged JFUR4 distributor
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Old Aug 12th, 2020, 12:51   #32
HRA
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Last Online: Mar 28th, 2024 16:36
Join Date: Aug 2018
Location: Surrey
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Quote:
Originally Posted by Burdekin View Post
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!
Attached Files
File Type: doc B20A Stromberg needle comparison HRA.doc (242.5 KB, 5 views)
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