Dual PMag tee
Figured out how to post these.
First pic is the first version. Effective, but ugly, and labor intensive. Set up for 2 PMags. Could cap off 1 port for single PMag. The outlet hose routed to the MAP sensor, or the pressure manifold.
2nd pic. AN Tee with a 910 union to make it a 4 port tee. MANY configurations possible depending on the builder. This particular one has 2 AN826-3D tees with a AN910-1D union. Supply port from the engine, 2 branch ports to the PMags, outlet port to the MAP sensor. WE use teflon hose for the supply and outlet hoses as shown by the AN hose ends here. The 2 branch ports are -3 hose ends and can use the PMag supplied hose, or teflon hose adapted to the PMags. Maybe not as compact as the handmade version, but much easier. The added bonus for guys that initially have 1 PMag with a AN824-3D or 4D tee, you can remove that tee, and install the dual tee, and add 1 hose for the other PMag. This eliminates the need for a new hose assembly, or modifying one that you have.
I chose the -3 version to simplify the plumbing. Alot of guys use -4 hose for the MAP senders. Thats ok too---With a -4 tee, just use a -3/-4 stem to reduce the size for the PMag, or the sensor. The ID of the -3 stem is .079. We havent seen any adverse readings due to line pulses.
WE 'may' decide at some point to make these from 1 piece or bar stock. It would make a more compact unit, and eliminate the union. BUT, for the time being, this is easy. NOT plastic, brass, nylon, and uses threaded connections.
http://i1316.photobucket.com/albums/t620/tsflightlines/dual PMag tee_zps8sznfctv.jpg
Tom