First off, I paid for these injectors myself and I am not affiliated with R&D IDI in any way, so I will try and just show the data in an unbiased way as possible, however, things like what makes a good spray pattern and poor are of my own opinion and experiences. Others may have different criteria for these things and that is absolutely fine, I am just reporting my own findings to help people who may be interested in these injectors.
Well, I bought these injectors when they first came out, and I was hearing that these injectors were coming with completely new nozzles, which have not been produced in years so I bought a set to see how they did. I paid $225 for the set, and have about 75k miles on them, this is the third engine they have been in and recently I have gotten an occasional fuel knock from an injector or two hanging open and a rough idle.
This evening I pulled the injectors out and went through each one on the pop tester, my tester is just recently rebuilt and recalibrated. Each injector looked normal when I pulled them out, but each nozzle was markless, here are the results as I pulled them out.
Well, I bought these injectors when they first came out, and I was hearing that these injectors were coming with completely new nozzles, which have not been produced in years so I bought a set to see how they did. I paid $225 for the set, and have about 75k miles on them, this is the third engine they have been in and recently I have gotten an occasional fuel knock from an injector or two hanging open and a rough idle.
This evening I pulled the injectors out and went through each one on the pop tester, my tester is just recently rebuilt and recalibrated. Each injector looked normal when I pulled them out, but each nozzle was markless, here are the results as I pulled them out.
- 1100 psi. Very poor spray pattern and sticking open
- 1600 psi. Good spray pattern
- 1300 psi. Good spray pattern
- 1500 psi. Good spray pattern
- 1500 psi. Good spray pattern
- 900 psi. Poor spray pattern (came back up to pressure spec after reshimming but spray pattern didnt improve much)
- 1200 psi. Good spray pattern
- 1300 psi. Good spray pattern