Ta Performance Oil Pump Upgrade

Background:
About 8 yrs ago I installed TA Performance High Pressure, High volume oil kit on my 68 cj6. The jeep has less than 200 miles on it since then. Never got it on the road. This year when I took the front off the motor prepping to rebuild it I found my distributor gear and drove gear really worn a lot. TA Performance claims this can happen with their high pressure kits???
Anyway as part of my motor rebuild I decided to focus on upgrading the oil pump with TAP's booster plate mod which improves oil volumn only. You can read about this on their website.
My 225 odd fire is at the machine shop and I having them ream the block oil pick up galley (both legs) to a larger 1/2 inch. Also I have purchased oil pick up with 5/8 inch tube to replace the original 1/2 in tube. A "o" ring type gasket will also be used where the pick up tube bolts to the block. All the above mods are advised by TAP.

TAP's kit includes a "booster plate" which bolts between the timing chain cover and the oil pump casing. I have flow matched the plate, the cover and the housing to improve oil flow.

These photos show the enlargement and flow matching of the oil pump case, first photo and the timing chain cover, second photo. You can see the difference between modified and the original. Both photos show comparisons. haven't mastered the photo insertion with separate tags yet, (assuming tag means captions)

 

Thanks for sharing. Me likey pictures.

 

Tomellen
When the block is back please take pictures and post!

Can you provide the part number for the pick up?

Without waiting for pictures did the block require a relief for the “o” ring?

As hou can tell I am getting ready for arebuild - already have the TAP plate
Thanks
Dennis

 

The high pressure kits definitely wear more due to the strain they put on parts, especially the distributor. High pressure kits should only be used on high-rpm engines to help overcome the centrifugal force where oil may not othewise reach critical components. A high volume pump is much more appropriate for our workhorse engines, and these don't wear nearly as much as the high pressure counterparts.
The V8 Rover engines from the late 80s - mid 90s had interchangable timing covers and similar oil pumps that had much larger oil passages than the old Buick 215 and 225. The oil pickups were also larger, but were used with much larger sumps, so don't directly interchange. Even the 231 even fire made great improvements in the oiling system.
Just another source.
-Donny

 

I will post pictures of block and send pi k up pt number although it is on TA's web site as well as te o ring type gasket. No relief required.

 

Finally have block back. Here is a picture of the front of the motor showing the reamed out oil galley going back to the oil pick up. I cant find my picture showing the original size of the galley. I had it reamed out to .500 diameter which is a 35% increase in cross sectional area. Both the vertical and horizontal galleys were reamed.

 

I was steered away from the high pressure option and just went with volume.

Way I figure it also is that plenty of these motors lived long lives in stock configuration.
And unless your building a daily driver it will never see the long term abuse...

 

Good point. My reasoning about the same, went more volume with all the mods on suction side of the pump. Didn't want to mess with the discharge galleys, but did clean them THROUGHLY with gun brushes then soap and water.

 

The only difference between high pressure and high volume oil pumps is the spring that controls the pressure relief, provided you are using the taller gears with the spacer plate. The taller gears make the "high volume" part of the formula. The oil pump kits often come with two or three different springs that vary in stiffness, the stiffer, the higher the pressure relief. High pressure causes much more increased wear, especially on the distributor drive gear. It also takes additional horsepower from the engine. High oil pressure isn't needed unless you are turning very high rpm where you need to overcome the centrifugal force to oil the crankshaft as it spins at higher rotations.
For our Jeeps, generally the stock relief spring is more than adequate.
-Donny