Todays Project - What did you do today?

[Rickabilly]

(11-30-2012, 11:34 AM)doubleboost Wrote: Hi
Rick
Was that the same as the oxford 1622 cc engine
The triumph units were shite
But the 1622 oxford engine was a scaled up a series
Nissan did use this engine but i seem to remember they put a alloy cylinder head on to it
John

Yes John, the oxford 1622 was another version of the same engine, the Nissan BMC 1500s in Australia had cast iron heads but it's not too much of a stretch to imagine Nissan fitting an alloy head to it, considering that they were available in the aftermarket and Nissan had the Aluminium foundries at hand to make ally heads if they wanted to.

All of these engines 1500, 1622 an 1798 had the same stroke 3.5" if I remember correctly. In the 1500 that meant a very long stroke to bore ratio as was the practice at the time in Britain as a result of the taxation laws, after these laws changed they just bored the engines and kept the stroke the same to get revier engines that still had good torque, even at it's biggest the bore only ever got to 3.166"(from memory again, might have been 3.186") which is still a long way from square.

I do love old engineering, there is always a story as to "why" and everything has a family tree. Incidentally the scaled up "A" series was simply called the "B" series, well what else would you call it? but in truth there were other differences it wasn't a pure scaling excercise, for example the water pump bypass concertina tube on an "A" series was replaced by a drilled gallery on the "B" series and the "A" series had "cranked" conrods the "B" series didn't, the "B" series even had the luxury of a proper cam chain tensioner(wow high tech) and then there is the better oil pump setup on a "B" series as well. If anything the modifications made to the "B" series made it a better unit than the legendary "A" series.

Best Regards
Rick