Hayabusa SBD Dry Sump Kit

Description

factors in our design

External PRV housing (pressure relief valve) for pressure stabilization
After several tests and prototypes, we discovered that the standard PRV position causes pressure fluctuations because the valve is no longer submerged. We designed an external housing with oil recirculation.

Remove pump on site - there is no need to remove the crankcase
remove The two-stage sump oil pump, which replaces the original water pump (you need an electric pump) is designed so that it can be removed and mounted while the crankcase is in place, this allows the user to inspect many components without having to remove the crankcase or disassemble the engine further. The pump mounts directly to our billet dry-sump pan without the need for hoses.

Internal cleanup channels The catch basin
is designed in 2 neat pieces; Channels are milled in the main part of the sump, allowing the dry sump system to collect oil from both the front and back of the sump, so no external sump pipes are needed. The pan is then sealed with a thin top plate attached to the main body of the sump. You only need to provide an inlet from your dry sump tank and a return to the tank (via an oil cooler, if necessary).

M8 mounting lugs for semi-loaded applications
We have also added 4 x M8 mounting holes to the 31 mm deep sump pan. The billet is extremely rigid and these mounting lugs allow the user to attach the sump to a car chassis if necessary to further increase the strength of their installation.

No baffles required - faster oil drainage
There are several reasons why we did not install a retaining plate. A retaining plate is designed to hold oil underneath it, so if the engine was a wet sump, there would be oil in the sump itself and when the vehicle turns corners, the bulkhead is designed to slow the oil movement under the bulkhead to prevent it from escaping. When an engine is a dry-sump, in theory there is no oil in the crankcase itself and therefore the baffle becomes an unnecessary component because there is no oil to hold on to. The other problem with using a baffle is that any oil that falls into the crankcase itself is slowed down by the baffle, but in fact this is the opposite of what you need and any oil that finds its way into the crankcase should be able to reach it as quickly as possible, Because the moment it reaches the sump, the clean-up pumps suck up the oil and return it to the tank as quickly as possible.

Remove standard oil cooler
The standard oil cooler option was removed from our dry sump system because there was always a significant oil pressure drop when in use. No matter what we tried, there would always be a pressure drop and as many Hayabusa owners would know, the oil pressure is quite high when the engine is cold and as the engine warms up and the crankcases would grow, the oil pressure would drop tremendously. We have even seen an oil pressure of 2PSI at tickover, if you mount the oil cooler only on the clearance side, the pressure part of the system does not have to work as hard and we have seen significantly more oil pressure under all temperatures.

Provision for Turbo return
If you are going to equip your engine with a turbocharger, we have created a special -8JIC fitting that will fit the front gage filter cap OS-DSK-BUSA-TURBO-C01 replaces.