Oiling system mods. (lots of pics!!!!)
 

I am performing all the oil system mods that i know of and thought i would share.

My objectives are.

1-No single passage smaller than 1/2" (including fittings).
2-No dual passage smaller than 3/8" (including fittings).
3-As few angled fittings and 90* internal passages as possible.
4-Block the oil galley in that goes trough the dowels (in case the dowel land brakes).
5-Be able to adjust the oil pressure externally (just do).
6-Minimize restriction on the oil pump pickup (turbulence).
7-Increase the oil system capacity (larger filter)
8-Regulate the oil pressure to the turbo without restricting flow.

I can't take credit for all of the mods. Some of them i pick up from reading over the years and some are my idea.





First are the mods to the oil pump passage. I did the standard porting and polishing but did not spend a tremendous amount of time on it.

http://img216.imageshack.us/img216/8...mods020np9.jpg
http://img216.imageshack.us/img216/5...mods021jk3.jpg
http://img216.imageshack.us/img216/2...mods022dz8.jpg
http://img216.imageshack.us/img216/9...mods023pt7.jpg


I then knocked the plug out of the end of the oil pump galley and enlarged the passage. I feel that this is the biggest restriction in the whole oiling system. I reamed it out to 1/2 all the way into the oil pump cavity and then tapped it (18 X 1.5) so i could eliminate the oil passage that goes trough the front cover. I am also going to plug the bypass valve in the front cover.

http://img229.imageshack.us/img229/6...mods018zr8.jpg

Plugging the passage to the front cover and bypass valve.

http://img229.imageshack.us/img229/3...mods027rp7.jpg

Then i removed the casting flash from the oil drain back passage in the front iron.

http://img291.imageshack.us/img291/3...mods026dg9.jpg




Then i removed the galley plug for the front main bearing. I reamed the passage to 3/8 and tapped it (16 X 1.5).

http://img87.imageshack.us/img87/871...mods015fl8.jpg
http://img87.imageshack.us/img87/406...mods012sp0.jpg

I enlarged the area where the banjo bolt for the turbo originally goes so i could tap and plug the galley (blocking oil from the dowels).

http://img228.imageshack.us/img228/7...mods025fh4.jpg
http://img228.imageshack.us/img228/2...mods024ai8.jpg

Thats about all the work i did on the front iron.



On the rear iron i made a oil filter adapter that eliminated the passage for the pressure regulator.

http://img220.imageshack.us/img220/8...mods030ru7.jpg
http://img220.imageshack.us/img220/4...mods028rd6.jpg


I reamed the rear main passage to 3/8" and radius the passage.

http://img216.imageshack.us/img216/8...mods034lo9.jpg
http://img216.imageshack.us/img216/3...mods032he2.jpg


I still need to make the pickup and plug the oil passage to the dowels in the rear iron.



Here are a few pics of the plumbing of the system.


http://img232.imageshack.us/img232/3...mods001yu5.jpg
http://img232.imageshack.us/img232/4...mods002kl0.jpg
http://img225.imageshack.us/img225/2...mods007rq5.jpg


Here is a shot of the "Y" that will oil the front and rear mains. It is #10 inlet and #8 outlets.

http://img225.imageshack.us/img225/1...mods006fz6.jpg

Here is a picture of the oil line for the turbo going to the regulator.

http://img88.imageshack.us/img88/579...mods003co9.jpg
http://img88.imageshack.us/img88/450...mods004ch8.jpg

And lastly, here are a few shots of the oil filter adapter with oil pressure adjustment. The #8 line from the adapter is the return from the regulator.

http://img228.imageshack.us/img228/6...mods011ac4.jpg
http://img228.imageshack.us/img228/7...mods009vb9.jpg
http://img228.imageshack.us/img228/1...mods008bm9.jpg


As i assemble and install the motor i will try and update this thread.

I found it amazing at how terrible the factory designed the oil system.

thats a beautiful setup you have there
more pics!

real nice.

Very nice, great write up and pics. There isnt alot of information spread around on this, hopfully someone will archive this

Damn nice job!

Thanks everyone. It is hard to find a lot of info on oiling systems so i just wanted to put it all in one place. As i build the motor i will post up some more mods including sealing the oil pump without gaskets or paper.

Wow !!! and here I am thinking that I actually modded my system !!!! amaizing work man !!

Very nice! I especially like the idea of have an external pressure regulator. Is this incorporated with-in that oil filter adapter?

Yeah, it is made into the adapter. The 12 pointed nut and 5/16 bolt are the adjustment point.

noob here no flaming but whats the benefit of all this?

Where did you get that oil pedistal/regulator? ive looked for external regulators and was never able to find any.

eBay. It's a pull off from a circle track car of some sort. I paid $99 for it. I was going to make an external regulator but after i found the pedistle i decided to kill two birds at once.


http://cgi.ebay.com/ebaymotors/ws/eB...S%252BI%252BSS





.

The short answer is that when HP and RPM are increased beyond stock the oiling system starts to become inadequate.

so like 400+ hp and trying to get 12k+ rpm this might be a good idea?

master lubricator

lube master indeed.

What did you use to block the upper dowel oil galley in the in the rear iron?

1/4 NPT plug.

hmm, i was unaware that the oiling system had so much room for improvement. For a 8k redline motor at say 14 lbs is there anything I could/should do when im already ripping it all apart to add dual massive oil coolers. That all looks like mods you do when building a new motor though

Good god man that is insane! I guess i missed what happend to your other motor? Was it oil issues?

Nothing oil related, more along the lines of 27 PSI on three piece seals. I will however need a stout oiling system for this beast https://www.rx7club.com/rotary-drag-racing-167/got-fuel-756944/

Plus all these mods were very cheap.

So are you going with ceramic seals or 3mm seals next time?

edit: Damnnnnnn!!!! That freakin' setup is sick! Can't wait to see youtube of that thing running. Good luck man!