Hello,

I am curious as to what the current trend is with dry sump pumps on serious effort turbocharged race cars. I am contemplating between a 4 stage, 4 stage with an auxillary vacuum pump or to go with a 5 stage. Is anyone using a vacuum pump in addition to the sump pump? The engine will see 40# of boost and I know I will be seeing some serious ring blow by at that kind of inlet pressure. I also know the advantages with naturally aspirated engines when pulling a vacuum on the crank case. Similar combinations as mine with 4 stage pumps (turbo) still see a couple psi in the crank case, and I'd like to see that number 0 or under...if even worth the effort. 5 stage or auxillary driven vacuum pump?

Thanks for any help.

 

i can tell you about the Z10 wetsump system, but not about others.

the oil system we run on our cars consists of 1 pressure section and 1 vacum section(one car has an extra section for turbo scavenge) the 1 vacum section is not enough to properly "vent" the engine, as it blows the relief valve open, blows oil all over the firewall/down the car/under the car..... we have seen it dripping off the wheelie bars..... not good... also, this system previously used the oil drain back holes on the rear of the block(also not smart) it filled the catch can up to the top, and then some(it was dripping out of the filter it was sooo filled up) @ the end of 1 pass.

we have bandaid'd our situation by installing 2- 1inch hoses on the front side of the valvecover, which lead to a catch tank. the vacum section now pulls off the rear of the valvecover(we put a small baffle in place)

we have never logged crankcase pressure/vacum so we dont know what its doing now, but we do know that the catch tanks stay damn near bone dry, so its at least helping.

 

Not trying to thread jack but I have a related question. In a NA road race B16 what type of dry sump setup would I need? The benefits I'm looking for is to be able to set the engine lower in the chassis and eliminate oil starvation during hard turns.

 

bump