I've owned my 1978 Midget 1500 from brand new. I change the oil every 3,000 miles using Castrol GTX 20/50. NO engine problems whatsoever at 78,000 miles
Great video! One thing we do here in the UK is to fit oil coolers to the 1500 engine in addition to the gallery work. I gather some people also machine for the slightly beefier MGB centre main and new tang position. We also used to lighten the flywheel somewhat to decrease crank flex - though its debatable whether or not that's effective - even if it is good for improved engine acceleration.
No. Pressure is goverened by the fit of the bearings to the crank, camshaft and rods. Flow increases with area. In other words, more oil will be present, but under the same pressure. Hope this helps, dave
I noticed that there was a lot of sludge in the oil pan. How often was the oil changed? Also, that former fix to the block may have closed off part of the oil gallery.
It slightly increases the volume of oil in the gallery and passages, and maybe increases (by just a fraction of a second) the time when you're staring at the oil pressure gauge/light (before pressure builds up) ...but the advantage is to eliminate a possible bottleneck in the FLOW of oil to rods two and three. Now if you were installing a remote oil filter on one side, and an oil cooler somewhere else, and you had large-diameter oil lines connecting everything, that might be something that causes a delay in getting oil pressure to the engine, because the oil goes from the oil pan, to the pump, over to the filter, then over to the cooler, then finally back to the engine. You'd want to keep that whole shebang filled with oil even with the engine off, to eliminate that delay. Kind of like using an oil filter without an anti drainback valve, the pump then has to fill the empty filter before the motor gets any oil, every time.
It’s all about maintenance (timely oil changes) and RPM’s ........running these vehicles above 4000 / 4500 RPM’s constantly will eventually be its demise , gotta remember back in the day (50 yrs. ago) in the UK the max. speed on all roads except the highways was 50-55 MPH so it worked for them but without overdrive (5th. gear) it’s a crap shoot on highways . Just don’t expect to hear anything from your radio or significant other ............... the lord works in mysterious ways . Fin .
I've owned my 1978 Midget 1500 from brand new. I change the oil every 3,000 miles using Castrol GTX 20/50. NO engine problems whatsoever at 78,000 miles
Great video! One thing we do here in the UK is to fit oil coolers to the 1500 engine in addition to the gallery work. I gather some people also machine for the slightly beefier MGB centre main and new tang position. We also used to lighten the flywheel somewhat to decrease crank flex - though its debatable whether or not that's effective - even if it is good for improved engine acceleration.
No. Pressure is goverened by the fit of the bearings to the crank, camshaft and rods. Flow increases with area. In other words, more oil will be present, but under the same pressure. Hope this helps,
dave
Man, I would want John to be my mechanic
I noticed that there was a lot of sludge in the oil pan. How often was the oil changed? Also, that former fix to the block may have closed off part of the oil gallery.
Midget 1500 is a Triumph spitfire engine isn't it?
wouldn't increasing the size of the oil gallery cause the oil pressure to decrease.
It slightly increases the volume of oil in the gallery and passages, and maybe increases (by just a fraction of a second) the time when you're staring at the oil pressure gauge/light (before pressure builds up) ...but the advantage is to eliminate a possible bottleneck in the FLOW of oil to rods two and three. Now if you were installing a remote oil filter on one side, and an oil cooler somewhere else, and you had large-diameter oil lines connecting everything, that might be something that causes a delay in getting oil pressure to the engine, because the oil goes from the oil pan, to the pump, over to the filter, then over to the cooler, then finally back to the engine. You'd want to keep that whole shebang filled with oil even with the engine off, to eliminate that delay. Kind of like using an oil filter without an anti drainback valve, the pump then has to fill the empty filter before the motor gets any oil, every time.
It’s all about maintenance (timely oil changes) and RPM’s ........running these vehicles above 4000 / 4500 RPM’s constantly will eventually be its demise , gotta remember back in the day (50 yrs. ago) in the UK the max. speed on all roads except the highways was 50-55 MPH so it worked for them but without overdrive (5th. gear) it’s a crap shoot on highways . Just don’t expect to hear anything from your radio or significant other ............... the lord works in mysterious ways . Fin .