I'm back. Installed the Mocal oil filter sandwich and re-plumbed the temp. senders to read the temps in and out of the engine to the oil filter. Photo's attached. If any of you are reading this who didn't read my first Post you'll have to back and look for the Subject: " Engine oil temp. study results".
I removed the thin-line sump sender because the temps read there were meaningless. In order to try to set this up where it's more easily readable, the following numbers (1 thru 6) correspond with the following nomenclature. 1= RPV or rear pressure relief valve. 2=T3D or Type 3 dip stick block off plate. 3=ECI or External cooler In. 4=ECO or External Cooler Out. 5=DCI or Doghouse Cooler In. 6=DCO or Doghouse Cooler Out
Ambient air temp was 80 degrees F. at the start of two test runs and the numbers are the average of the two runs like last time. Fwy speed was 70 mph on level road and Street data was stop and go in traffic. Idle test data was after 5 min at idle two times after the runs on the fwy and street. The CHT data was as follows. Street: 331F. Fw: 325F. Idle: 329F.
To me, the most significant change was in the stability of the oil temps. and getting the oil temps. up slightly. Also I could hear the Ext. cooler fan cycling frequently except that now it didn't come on at all when at idle. Before, it would come on once it reached 180 F. and stay on until I shut off the engine.
The External oil cooler reduces/changes the oil temp much more than the Doghouse cooler does. I believe it should. It has much more surface cooling area. So here is the numbers. In Fahrenheit.
SEND STRE FWY IDLE
1RPV 179 178 169
2TD3 182 182 175
3ECI 183 191 177
4ECO 168 180 168
5DCI 162 167 145
6DCO 158 164 141
I think the Mocal Sandwich makes a positive improvement and I am now confident in knowing that my oil temps are within range and that the readings I get are from a reliable place on the engine. Sender TD3 tells me what's happening in the engine. It's also a simple install if you have that block-off plate. If not I would choose to install a sender in the oil filter inlet side assuming you have a "Mocal Sandwich". Having looked at three different oil filter adapters, I think an 1/8" NPT sender could be installed in the adapter. There appears to be enough "meat" to do so.
Respectfully.....Bruce
), but I don't think there's any heat transfer going on there. The exhaust will eventually damage the hose, but that's another story. Al
