Just found another weight for the Superlight 180sl (basically a mazda 13b with alloy front, middle and rear housings from raing beat) and a 35lb propeller step gear.
at 210 - 35 lb = 175lb

Then 175lb divided by 2.2 = 79 kgs!

confirming my calculations made using the data found earlier.

Add 16kgs to the 79 = 95/96kgs for the normal steel and alloy version of the 13b

It seems the turbo rotaries are the boat anchors which still make small cars 9s cars at the drags but the NA 13b is the lightweight.

The fact is 13b of any sort are rarely used as it makes most non rotary small cars illegal in all club events as well as on the road