20-06-2018, 03:03 AM
This raises the question of typical oil consumption. When broached a few years ago I recall Ruairidh was about the only person who reported a very low consumption. My car with original wide rings used very little; my father considered it due for new rings at 1 pint in 800 miles. I took it over very worn but still not with excessive oil use, but a Cord ring fitted under the top ring as spacer as per a Cord pamphlet proved hopeless and it then used gallons. I fitted narrow ring pistons in another block worn moderately but barrel shaped (not initially noticed from usual top and bottom measurement) Again used a lot of oil. So was rebored with 4 ring pistons, ci oil rings, expanders behind the top oil ring but still used 1 pint per 300 miles on long main road trips. With baffles.
Just what is achieved with/without baffles? They must have considerable effect to justify the complication. The situation for racing is different; consumption matters little.
3 or 4 piece steel oil rings would presumably help. I dunno if now used but Seven experts used to reckon these sapped too much “power”
Just what is achieved with/without baffles? They must have considerable effect to justify the complication. The situation for racing is different; consumption matters little.
3 or 4 piece steel oil rings would presumably help. I dunno if now used but Seven experts used to reckon these sapped too much “power”