BLDun

I am installing a separate oil pressure guage and have a question. Can I simply tap into the wire that now comes from the oil pressure sensor or am I going to have to add a separate pressure sensor for this guage???

shoebox

I would say you need a separate sensor. Tapping into the existing one will likely throw off the resistance reading and make both gauges inaccurate.

BLDun

Shoebox, I am having trouble finding the auxiliary oil port. I looked at your pic but it is too close to see exactly what's around it. I see the edge of the oil filter but on my engine I can't find the port. Is it located on the side of the block or at the back?? Either way I'm probably going to find I don't have much room to screw in a sending unit.

Injuneer

Its on the side, right above the oil filter. I use that port for my mechanical oil pressure gauge.

Look at the pipe plug stuck in the block above the filter/oil cooler.

http://members.aol.com/InjuneerZZ/im...hotos/Dyno.jpg

BLDun

Thanks, Fred, I finally found it. Problem is that the sending unit I have doesn't match hole. It has fine thread and looks to be about 3/8 while the plug I pulled out has a coarse thread and appears to be be 1/4". Any ideas where I can pick up a sending unit??

shoebox

Just get some adapter fittings.

Injuneer

You have an electric pressure sender? Are you sure its 3/8"? Usually they are 1/8" NPT (which has an O.D. of about 3/8"). The hole in the block is 1/4" NPT. There's a 1/8 x 1/4" NPT bushing that would reduce the hole to match the sender.

You may also need an elbow to point the sender in a different direction, because space is at a premium at that location. I have a mechanical oil pressure gauge, and a brass elbow screwed into the block, with a -4AN braided hose running into the dash.

You can see the elbow in this pic, and how crowded it is:

http://www.injuneer.com/images/photo...e/DCP03020.jpg