I just picked up a set of RC 440s SL9-440. When comparing these injectors side by side with a stock 1.8 injector there is a few physical differences.
The differences are mainly at the bottom of the injector where it inserts into the head.
Here's a RC Injector
Here's a tan top Injector
My concerns are....
1. The length of the "nipple" where it inserts into the head is shorter on the RC. The difference is 0.225in. From the top of the injectors to the the stepped area where the injector would rest on the head is the same so I know they will work. The only difference is the stockers protrude 0.225in deeper into the head.
2. The RC doesn't have any kind of dust cover/vacuum seal on the bottom.
3. The nipple on the stock injectors measure 0.375in Dia, the nipple on the RCs measure 0.360in Dia.
Being that RC specs these injectors as direct replacements for the stock injectors, I don't think I have any issues. Do you see anything to be concerned about? Am I missing a "cap/seal" on the bottom of the RCs? Am I missing 0-rings at the base of the RCs?
Am I just being a geek and over analysing this?