[DM3]

Thanks, I will hook up the mechanical gauge to that over the weekend.

Originally Posted by Joe's Garage

It's the threaded port to the driver's side of the distributor.

Usually got one of those goofy square hole pipe plugs in it, unless someone has already taken it out.

[b-man]

Originally Posted by DM3

Also going back to the WIX 51042XP filter since I can not get a standard size oil filter to fit due to the headers. Once we have the oil issue resolved, I will 'modify" the header since I only need about 1/4 of space to get the oil filter on.

Rather than modify the header or relocate the filter this clever and easy little mod to the filter adapter should do the trick:

https://forums.maxperformanceinc.com...d.php?t=468168

[DM3]

So a quick question, I am adding an additional mechanical oil pressure gauge. I am planning on using the port next to the distributor, will this give me a more accurate reading instead of using the oil filter housing port?

Thanks

Dirk

[Scott65]

It's a more comprehensive look at oil pressure, especially when you use both. You can see differential pressure, as the housing location is before the filter, the port near the distributor is post filter, mains, rods, and at least one bank of lifters. ( Maybe both? I can't remember)

["QUICK-SILVER"]

Originally Posted by DM3

So a quick question, I am adding an additional mechanical oil pressure gauge. I am planning on using the port next to the distributor, will this give me a more accurate reading instead of using the oil filter housing port?

Thanks

Dirk

Down stream/aft filter will not change the high pressure reading at the filter adapter.

Max preassure is set by the relief spring in the oil pump.

Clay

[Scott65]

Pressure is also a result of the internal clearances.

[grivera]

Originally Posted by Scott65

Pressure is also a result of the internal clearances.

Same thing I alluded to in post 13: https://forums.maxperformanceinc.com...2&postcount=13

["QUICK-SILVER"]

Originally Posted by Scott65

Pressure is also a result of the internal clearances.

Originally Posted by grivera

Same thing I alluded to in post 13: https://forums.maxperformanceinc.com...2&postcount=13

Tight clearances/resistance to flow would make the pressure relief, in the pump, open sooner.

Tight clearances/resistance to flow would not turn 60 psi relief into 100 psi relief.

Clay

[grivera]

Originally Posted by "QUICK-SILVER"

Tight clearances/resistance to flow would make the pressure relief, in the pump, open sooner.

Tight clearances/resistance to flow would not turn 60 psi relief into 100 psi relief.

Clay

good to know - thanks

[johnta1]

But,


If you have 100 PSI at the filter, but only 30 PSI at the engine, not good.

[DM3]

So, this weekend I changed the oil to a 5w 20, back to the Wix 51042XP oil filter and only attached the oil pressure gauge tester I bought and mounter the gauge in the car.

Oil: 5w 20
Oil Filter: Wix 51042XP
Mechanical Pressure Gauge - reads to 100 PSI
Oil PSI at Idle: 45 to 50
Oil PSI while driving in 3rd gear: 80
Oil PSI at Idle after a drive sitting in driveway: 30

[DM3]

So I visited the shop today and discussed the issue. They have no issues with the 30 to 35 psi at idle and operating temperature. And he said with a high pressure pump he also has no problem with the 80 to 85 psi while driving. He suggested driving it a few hundred miles and see if the psi changes or stays the same, he would be more concerned if the psi was too low rather than high.


He also said if I don't feel comfortable, to pull the engine and bring it to them and they will replace the pump. Or I could try to raise the motor enough to drop the oil pan while the engine is still in the car, but I don't think there is enough room.

[DM3]

I drove over to the other shop that has done some work on the car. Told them what has happened over the last 3 weeks. After driving the car for about 20 minutes, the car idled steady at 22 psi and was between 60 and 80 psi while driving.

The second shop, who is very familiar with the car, said it was fine and to keep driving it.

[Tom Vaught]

Have to agree with the second shop, at least at this point in time.

Tom V.