Project Dry Sump

[christdeyoung]

Not very familiar with multi-stage pumps, are they individual in/out or common in/out?

There's multiple scavenge stages and one pressure stage. Each scavenge inlet is individual, and the scavenge outlet can either be individual, or just one main line returning to tank.
Pressure stage is obviously a dedicated suction from the tank, and discharge to the motor.

[xcye]

A small update:

I have finished adjusting a few things:
1. Switched to a small drive gear to lower the idle pressure to about 30psi.
2. Switched to a stronger relief spring so the max pressure now is about 110psi.
(Measured at 90 degrees with 5W40 LIQUIMOLY)
3. I also blocked one valve vent, and connect the other to the catch can with a peterson one-way check valve in between. Finally, the crankcase sees some vacuum, 3-4 inches at idle and around 8 -12 inches above 4000rpm.
4. Added an XS-Engineering ignition amp to resolve misfiring under high rpm and high boost condition.


5. Completed the bracket drawing and had it CNC machined out of a single aluminum block.

[xcye]

I am gauging interest of a group buy from AVIAID and Peterson for Dry Sump related items. If you are interested in anything from them. Please feel free to pm me.

[xcye]

Small Update:
Went to a track day a couple of weeks ago. The power steering belt snapped after 20 laps. However, the oil pressure was very consistant through out the session. Oil Temperature hit 105C. The pressure was above 100PSI after 3500RPM all the time. The car was a blast to drive, which surprised me since the car was still on stock suspension except some nismo rear control arms and bushings.

Later, I found a bolt that fixed the drysump pump to the bracket was a little too close to the power steering belt. Under day to day drive, the belt does not flex that much to touch the bolt. But on track, when rpm changes too quickly, the belt does get in contact with the bolt. And that broke the belt. So, I sent the CNCed bracket back and have it modified a bit to move that bolt out of the way.

Today, I installed the modify bracket. Everything bolted up perfectly.

While I was under the car, I also took a picture of the rear oil pick up.

[jerrym]

HI-OCTANE sells a dry sump kit ..

[dustyGTR]

Yeah and it's only 10k, I think this is a much more pocket friendly setup.

[Speeddm]

Don't opt for a cheap pump. Go with a weaver Bros.

[xcye]

Yeah, the Hi-Octane does seem to be a little expensive. However, after my exercise, I totally understand why they (as a company) price it that way. They must have spent a lot on R&D to get it right.

Anyway, I was out on track again last weekend with the new bracket. My car quit again after another 20 laps. Hey! What was wrong with my luck. The car lost power and was clearly running on 5 cylinders in the last lap. In the pit, I found the number 2 cylinder was not firing. So, I limped the car home with #2 injector wire plug unplugged. Later at home, after replacing ignitor, #2 coil and the spark plug(it looked good to me though), the car fired right back up and on full power again. I did not bother to check which of the above three components actually caused the problem.

Despite the bad luck, at least, I can say that this dry sump system has no problem to handle track duties.

BTW My Car has the following modification done to it besides the dry sump.
AEM ECU with WB O2, AEM 3.5 Bar MAP
Tomei 600cc injectors
Tomei PonCam Type-B
Tomei Exhaust Manifold
Tomei Timeing belt
Nismo Lemons Spec Turbos
HKS Dump and down pipes
Unknown 4inch Cat Back with Test Pipe.
OS Giken GT2CD Clutch
Nismo Rear Sub Frame Bushings
Nismo Rear control Arms
HICAS Deletion
R33 GTR Rear Brakes
Greddy,HKS Gauges
Greddy Boost Controller (17PSI Low, 22PSI High)

[xcye]

Don't opt for a cheap pump. Go with a weaver Bros.

I do not think Aviaid is any inferior or cheaper than Weaver Bros (although I do not actually have a weaver bros to compare). Aviaid and Weaver Bros basically share the same design.

To be honest, I like Peterson R4 pumps more (I had one of those 3 stage R4s before). But, they were too busy to build a pump to my spec at the time I was building the dry sump system. Then, I called Aviaid, and they did it in two days.

[christdeyoung]

Just picked up my 4 stage Moroso pump (p/n 22244) and a 10 liter tank from canton racing!

[Speeddm]

If you spend time working with Weaver. You will never deal with anyone else ever. The best service you could ever get.

[xcye]

Just picked up my 4 stage Moroso pump (p/n 22244) and a 10 liter tank from canton racing!

I can't wait to see another dry sump GTR project in progress.

If you spend time working with Weaver. You will never deal with anyone else ever. The best service you could ever get.

I believe that Weaver has great product and service. However, I wish they had a better website, so I could somewhat pick them to begin with. BTW, I had no complaint about what Peterson, or Aviaid had offered.

[xcye]

I did not spend too much time on it this winter other than enjoying driving it. Yes, in winter.

I did however manage to replace the stock ignition system with GM Truck Coils. Those coils are much more powerful than the stock ones and come with internal ignitors. The pictures are pretty much self-explanatory.



Here are more pictures:
http://photoshare.shaw.ca/messages/v...55002/gallery/


BTW, I am trying to organize the GB for the dry sump core kit, which takes out any guess work (which are very costly and time consuming) when you are building such a system. If you are interested please check http://forums.gtrcanada.com/group-bu...rb-engine.html

[GTR-Dad]

Do you have a back up in case the belt snap/falls off ? I was looking into plumbing an electric pump, has a primer and a back up, but they need a lot of juice, are not all compatible with hot oil, and would add
weight and more oil lines.

My plan is to have the ECU kill ignition if oil pressure drops below a threshold.

[Xeno-Vibe]

I remember reading a few build threads with Hi Octane dry sump systems.