Originally posted by coop
Ok, I just got my PFC installed, I have a WB-O2 on the way...and I am working on getting Dataloggit.
Now for some (ok, alot of) questions:
(I did search first)
1.) Can I tune *moderatly* well without a dyno?

Yes, I would argue better than on a dyno...unless it has the ability to generate variable loads

2.) what boost can I tune for with stock turbos, not ported engine or WB? I do have the upgraded fuel pump. I have heard 13~14 psi is the limits, is that due to the compressor limits, or the engine limits? Does WI affect those limits? (see question #7)

Depends on AFR, INJ duty cycle, INJ size, temperature, humidity, elevation. If you have enough fuel, you can operate well outside of the optimium range of the stock turbos.

3.) I notice my injectors currently are at highest value of 50% when under WOT, what is a safe upper level to run stock injectors at?

Goto www.maxcooper.com and check his fuel calculator. I think you need to double check your max duty cycle at WOT. You have stock injectors, I take it? Check that calculator out and it will tell you how much HP you're not making.

4.) What pressure can factory apex seals handle?

No question is a silly question. Some come close.
Rob at Pineapple Racings says that a stock (from the factory) block can handle more boost than most any reman. He says he has seen the stock blocks goto 20psi, and hold together longer than anything else, other than his rebuilds. You were talking about boost at good AFR's?

5.) Is the process for uping the boost, to add more fuel than needed and then tune it out based on AFR.

Kinda. I think it's more important to measure where you begin from...baseline.

6.) is there an explination about leading/trainling spark degrees? how it affects combustion and the like...

Dude, you need to search and exhaust the information that is already in this forum. I hate playing that trump card and I risk lawyer Jeff having a snit-fit, but...

7.) How does a water injection system help with tuning, I have read it helps keep knock down by cooling the combustion chamber. So does that allow more boost/fuel levels than a non-water injected system?

Check the manufacturers web sites for more information.

Any answers would be greatly appricated!

It takes a little work to get the right answers...don't be afraid to put information that you have found in your messages. I bet you'll get more information back when people realize that you're not just trying to shortcut and you're a serious "hobbyist", willing to work and ask for help when you're stuck. Good luck.

-Dave