hi all, as i've already cracked my sump once (e30 318is), and i plan to road rally this car i'm thinking of modifying the sump. my first thought is to make a steel sump which is wider and shallower than the existing one and shorten the oil pick up inside the engine to accomodate this; i'll also have to baffle the sump to try and counteract the increased chances of oil surge. the other thoughts i have are dry sumping it. now i don't know much about this or if it's possible but if anyone has any experience it would be greatly appreciated. making bits for these jobs isn't too much of an issue for me as i work in a machine shop and am a welder/fabricator too. i'm also thinking that an oil cooler may be advisable as the sump as standard is very low and finned which i assume is for cooling purposes. any suggestions or experience on this would also be appreciated too.
thanks alot
Kevo
modified sump?
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kam-325i
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For road rally, a dry sump would be best.
My basic understanding of a dry sump system is that instead of the oil pick-up sitting in the oil in a sump under the crank, a tank is used, up higher, around the header tank height, with a pipe to feed oil directly to the oil pick-up, but thats where i get lost, not to sure on how the oil gets back into the tank !!!
My basic understanding of a dry sump system is that instead of the oil pick-up sitting in the oil in a sump under the crank, a tank is used, up higher, around the header tank height, with a pipe to feed oil directly to the oil pick-up, but thats where i get lost, not to sure on how the oil gets back into the tank !!!
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kevo
- E30 Zone Camper
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hiya kam,
I was at a road rally last night and there were a number of e30s competing all of them were as low as mine with standard sumps (but well guarded) so they are useable; but i fancy doing something like dry sumping i assume it directly pipes to the pick up and that there is a small tiny tank which tapers down to a point where the oil goes into the return pipe. but i need to find out how much the oil pump pumps (?) in order to get a similar spec pump which would be driven of the crank possibly via an extra pulley on the front of the engine but this is where i have to get into specifics or i run the risk of starving the engine of oil. i may go for the steel shallower tank idea but need a bit of help regarding the pick up. i.e. would there be any issue in shortening it? or is it just a pipe at the end of the day?
cheers for ur help.
Kevo
I was at a road rally last night and there were a number of e30s competing all of them were as low as mine with standard sumps (but well guarded) so they are useable; but i fancy doing something like dry sumping i assume it directly pipes to the pick up and that there is a small tiny tank which tapers down to a point where the oil goes into the return pipe. but i need to find out how much the oil pump pumps (?) in order to get a similar spec pump which would be driven of the crank possibly via an extra pulley on the front of the engine but this is where i have to get into specifics or i run the risk of starving the engine of oil. i may go for the steel shallower tank idea but need a bit of help regarding the pick up. i.e. would there be any issue in shortening it? or is it just a pipe at the end of the day?
cheers for ur help.
Kevo
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Turbo-Brown
- Boost Junkie
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- Location: Aldershot, Hants
I'm a coward so I'd be scared to reduce the capacity of the sump for fear of it emptying on a long corner or something.
My understanding of dry-sumping is that you have high volume scavenge pump(s) which take whatever they can from the sump and lift it to the tank from where the oil drains back to the high pressure pump for supply to the engine.
From what I gather though, the scavenge pumps will blow a lot of air up to the tank with the oil making it all bubbly so the tank needs some kind of arrangement in it to get the air out of the oil before it goes back to the pressure pump.
Be interested to know how you get on, perhaps contact someone like Pace for advice on the pumps.
My understanding of dry-sumping is that you have high volume scavenge pump(s) which take whatever they can from the sump and lift it to the tank from where the oil drains back to the high pressure pump for supply to the engine.
From what I gather though, the scavenge pumps will blow a lot of air up to the tank with the oil making it all bubbly so the tank needs some kind of arrangement in it to get the air out of the oil before it goes back to the pressure pump.
Be interested to know how you get on, perhaps contact someone like Pace for advice on the pumps.
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