DanG144 said:
Eddif,
I have seen no information that leads me to think the cam force from the 150 injectors would be any less than the 100 injectors. Doesn't it all depend upon how it was designed?
You could end up with the same or higher peak forces, but perhaps of shorter duration.
Do you have information on this, or are you making assumptions on what you hope is a similar case?
Dan
For one, SBA reported he was able to lay down a black smoke screen. This means that given the tandem pump pressure that exists stock, you can get more than the needed fuel at high RPM WOT. Thus the high RPM primary fuel pressure can be reduced leading to lower injection pressure at high RPM and or WOT. The low RPM pressure from the pump would not be affected with the correct tandem pump modifications,and idle should not be affected.
Assumptions and extrapolations can be different. Of cousrse I do not know enough to be 100% sure on any of this. I will not even presume to know what an extrapolation is. Some of this is based on similar cases, and uses lateral thinking to arrive at the logical outcome.
Cam bearing cutting is derived from engine design where several bearings are unique to their running position. Our engines have unique design flaws and require a unique approach to counteract each situation.
Peak forces should be down and rely on similar to stock durations for fuel delivery using larger openings / design flows.
A theory is that - a theory. You test it to see if it works. Some have suggested our wear occurs at start up. Talks nice and the way to address this is to install the pre lube device and test it. I am testing the cut bearings and will report in just as I did with stock cam bearing replacement. I would call the stock cam bearing replacement a limited success. Reading the 5,000 mile bearings says that the timing belt bearing would fail just like the first stock set did. The replacement set needs to be modified IMHO. Yes we test change and retest. Sorry this is a forum to work together not a store that sells you an item with a glorious description, of a new product that you have no information about.
My test of ZDDP was a flop, but you did get the results and know what not to do. If you faill it is not the end of the world it is an opportunity to learn. Some tried the added filter and when their engine failed it is sitting on a shelf somewhere. Others are going on testing. Both folks are adding to our knowledge. I would say the filter would be a waste of my money, but if later it is found to work a certain way, I will go back and reconsider.
Just to be testing something is not an end of and to itself. I do not make a habbit of trying everything I come in contact with another way. I was just forced by circumstance to try something on our PD. No fix was available and we need something. I wish VW was shipping the solution tomorrow, but I hear no rumors that suggest it is coming. VW did make the black followers and they also fail (sorry about that). I appreciate the effort VW put in.
We have to work more and report in. Talk and work.
What has everyone done today to help our cause?
eddif
Edit:I could not make changes in the draft copy and had to use post and edit to get some changes to work.