Yep agreed on the pump volume helping, it just seems strange how low your pressure is at soak.
Am I correct in assuming you have an unrestricted -4 hose feeding the turbo with oil?
Is the center assembly coolant cooled?
What's the return line size?
What's your total oil system volume?
Do you ...

Interesting...

What's your oil temp at full soak? In the sump or in the valley? What weight oil are you using?

Okay, let's back up because I'm sure I missed somthing.

Why is it felt that more volume is needed?

How much volume is needed? Or felt needed. At 750rpm, at 2500rpm, at 6500 rpm?

What volume per rev did you calculate from the current pump?

I would have looked the math models before I left work ...

They can cost that much, but there are ones that are much cheaper. Modifying the front cover seems like a lot of work for minimal gain. Especially if you aux feeds for a turbo(s) or spring oilers. Having the ability to get the exact pump section size would be the benefit.

Why not just use a single stage external pump? And do away with the front cover pump all together?

I've done something very similar to this with my 96. Take a look at my builds. That said, try to stay with other h car ecus as it will be easier. If you are going to mod the l67, try to find a 98 or 99 4t65ed-hd.

This will drasticly save headaches on wiring. Then it's just a couple of pins to move ...

I currently have 3.29s in mine. I am heavily modded but I am still getting 16-18 at 55 to 60mph average.

*Edited for spelling

Brakes are next summers project. I have somthing special planned for them and they are going to be big...

One Step closer to driving. Now sitting on GXP wheels with 245 wide tires. Its still riding a little high in these pictures as the suspension needs to be settled yet. The suspension should drop roughly another 19mm from this photo.
http://i1314.photobucket.com/albums/t576/imolaspeedster/20170422 ...

You absolutely have to bring this beast out to the MI Meet in June, it's in your backyard...

Maybe, we'll see if I can get this dialed in by then.

...and if work doesn't have me doing long hours again this summer. I should have time as my next engine project isn't set to go to production until 7 ...

J Wikoff wrote:Link for the fog lights?

And... wanna make a second exhaust?

Fog lights are JW Speaker's Model 90.

Fuel Lines are installed
http://i1314.photobucket.com/albums/t576/imolaspeedster/FUEL%201_zpsujcgvwvg.jpg
http://i1314.photobucket.com/albums/t576/imolaspeedster/FUEL%202_zpsqmcqpzdj.jpg
Being that I am replacing all the fuel lines and fuel pump, I decided to replace the fuel tank, filler tube ...

Somw of you may remember that I was working a true dual exhaust system for this car. I actual started to mock-up of it last fall to save me time this spring on fabricating it. Well, the exhaust system is done and hung in the car.
http://i1314.photobucket.com/albums/t576/imolaspeedster/20161002 ...

The new engine has been installed.
http://i1314.photobucket.com/albums/t576/imolaspeedster/UNDERHOOD_zpsexldwuuy.jpg
The weekend actually was pretty productive. I was able to get the engine installed and built mounting brackets for the engine oil cooler and intercooler heat exchanger. The radiator ...

We made multiple pulls in the two days on the dyno. I started off using a 3.8 pulley and slowly worked my way down to the 3.5. However, I may back this off to a 3.6 to keep boost done a bit for street driving. Boost at higher rpm was at first a problem. At first the engine did not like going lower ...

Updated Dyno Sheet

Dyno time was successful.
The important part of the last run is shown below:

Well, Dyno time was pushed back a few days. But I made on sunday, Monday we spent the day instrumenting, and will spend tuesday and wednesday making numbers...
http://i1314.photobucket.com/albums/t576/imolaspeedster/GM%201_zps3fukugmv.jpg
http://i1314.photobucket.com/albums/t576/imolaspeedster/GM ...

I would have to check with the body and safety people, but I am 90% positive that there is an FMVSS standard for this. Internally its a no no to put the exhaust on the same side as the driver and its a no no to have the filler on the same side as the exhaust. At least that is in the states...

The ones in the pictures are modified zzp's. I have a custom set that i am finishing up now that will actually be used in the car. The final ones are stepped from 1.62 to 1.75 to 1.88. And have a 2.5 merged type collector.