BruceH
BBB Big Bore Boss 322
I purchased a 2013,14 GT500 oil pump for the billet steel back plate. I had planned on swapping plates and calling it a day but in the end I swapped the pressure relief springs and retainers.
Along the way I took some pictures and measurements. The main difference is the longer and stiffer spring used on the GT500 pump. This has been previously reported but I have a few more pics and comparisons.
Pump housings side by side. 2013 is on the left. The 2013 had about .005" less depth for the rotors than the 3v had. It also had about .020" less depth for the pressure relief spring.
Georotors stacked on top of each other. 3v are on top. The 2013 were about .002" thicker than the 3v rotors.
Insides of the back plates are a little different.
During reassembly I overtorqued a screw. Luckily I had this left over from my first slave cylinder swap during which I overtorqued a slave cylinder bolt.
FYI 100 inch pounds is the torque for the backplate. If you try 145 because you aren't thinking it will strip the threads at about 120. I had torqued everything to 100 and then stepped up to 145. After the first screw stripped I rechecked and found 100 inch pounds to be the correct torque. 65 inch pounds would hold these fasteners just fine. The 100 inch pound reference came from a shm book.
Along the way I took some pictures and measurements. The main difference is the longer and stiffer spring used on the GT500 pump. This has been previously reported but I have a few more pics and comparisons.
Pump housings side by side. 2013 is on the left. The 2013 had about .005" less depth for the rotors than the 3v had. It also had about .020" less depth for the pressure relief spring.
Georotors stacked on top of each other. 3v are on top. The 2013 were about .002" thicker than the 3v rotors.
Insides of the back plates are a little different.
During reassembly I overtorqued a screw. Luckily I had this left over from my first slave cylinder swap during which I overtorqued a slave cylinder bolt.
FYI 100 inch pounds is the torque for the backplate. If you try 145 because you aren't thinking it will strip the threads at about 120. I had torqued everything to 100 and then stepped up to 145. After the first screw stripped I rechecked and found 100 inch pounds to be the correct torque. 65 inch pounds would hold these fasteners just fine. The 100 inch pound reference came from a shm book.