kikiturbo

I made a G sensor that I can trigger at acceleration level of my choice...

Wall around the pickup is as tall as it can get... any taller and crank would hit it..

Ayoustin

iTrader: (2)

The challenging thing is I don't think you can correlate a certain amount of oil drainback to a lateral acceleration.

I would be worried about the pump pulling in air and pushing that into the sump and aerating the oil.

kikiturbo

oil drainback is in direct corelation to lateral acceleration...

as for aeration of oil... that is a valid concern, yes... (that can be only solved by a dry sump with large reservoar.. unfortunately..)

LetsGetThisDone

iTrader: (1)

Issues with dry sump is, for a street car, AC has to go. The belt slipping isn't really problem. Years of being around race cars, I've only seen a belt come off due to a rock getting in the engine bay on a short course off road truck. And the rock only got in because someone forgot to put a panel on. Other than that, dry sumps run cog belts. Replace the belt at appropriate intervals and they're generally problem free.

kyoo

iTrader: (29)

curious - what's the mechanics of the drainback wrt to lateral g's?

slicers also help with aeration

LetsGetThisDone

iTrader: (1)

Ever been in the amusement park ride where your in a drum that spins, then the floor drops out, but you drop with the floor, you stay stuck to the wall? Same concept with oil drain back. Gforce makes it stick to the sides of the block/head/whatever instead of falling back to the pan.

kyoo

iTrader: (29)

oh ok - no, but i assumed he was saying there was a positive correlation, i dont know why. obviously that makes sense. at least the kiggly hla will help not flood the head, but once it's there it's there until it drains back. there's not a lot of "neutral" g situations on a track though... when would it ever efficiently drain back, lateral g or otherwise

kikiturbo

running an engine at 1 G lateral acceleration is identical to running it at 45 deg angle.. in this case, fly being lower than crank pulley if you get what I mean... It is pretty clear where the oil will go.. Even the oil in the head will drain down but it will still fall to the wrong side of the engine..

If you take into account the ammount of oil the pump will flow at track speed RPM, you will see that "keeping the oil around the pickup with baffles" is just a part of the solution..

one more thing I am doing is venting the block with a hole in the crankcase. This way I can cut off the two vent ports that are cast in the head which will open up two more drains from the head...