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Search took 0.01 seconds. Search: Posts Made By: JFP in PA
Forum: Performance and Technical Chat 05-31-2019, 01:05 PM
Replies: 54
Views: 11,286
Posted By JFP in PA
All the AOS operate the same way, they are a...

All the AOS operate the same way, they are a throttling device, not unlike the cooling system's thermostat, the take a relatively high vacuum level at the intake (well over 20 inches of mercury) and...
Forum: Performance and Technical Chat 05-31-2019, 12:03 PM
Replies: 54
Views: 11,286
Posted By JFP in PA
Vacuum levels created by flow across an opening...

Vacuum levels created by flow across an opening are totally dependent upon flow rates, which are never constant in the intake box. The heads on the 997.2 do not "vent" into the intake tube while the...
Forum: Performance and Technical Chat 05-31-2019, 11:14 AM
Replies: 54
Views: 11,286
Posted By JFP in PA
First of all, the air box is open to the...

First of all, the air box is open to the atmosphere, there is no vacuum, only flow. Check it some time with a digital manometer, if anything you will find a slight pressure at speed, which is why I...
Forum: Performance and Technical Chat 05-31-2019, 10:02 AM
Replies: 54
Views: 11,286
Posted By JFP in PA
It DOES matter, without the five inches of...

It DOES matter, without the five inches of crankcase vacuum, the low tension piston rings will not seal properly, leading to loss of power, blow by into the crank case, etc. I can see adding a puke...
Forum: Performance and Technical Chat 06-17-2016, 05:16 PM
Replies: 54
Views: 11,286
Posted By JFP in PA
Because oil used to sit on the diaphragm,...

Because oil used to sit on the diaphragm, weakening it with time.
Forum: Performance and Technical Chat 06-17-2016, 02:40 PM
Replies: 54
Views: 11,286
Posted By JFP in PA
How does he resolve the click on fitting that is...

How does he resolve the click on fitting that is molded into the plastic intake behind the throttle body?
Forum: Performance and Technical Chat 06-17-2016, 07:31 AM
Replies: 54
Views: 11,286
Posted By JFP in PA
Only problem is that the AOS unit uses "click on"...

Only problem is that the AOS unit uses "click on" hose ends which are vastly more failure prone than the hose itself:
...
Forum: Performance and Technical Chat 06-03-2016, 01:50 PM
Replies: 54
Views: 11,286
Posted By JFP in PA
Problem is that the AOS system draws vacuum on...

Problem is that the AOS system draws vacuum on both cam covers and thereby the sump. Even at only 5 inches of water, hot oil is going to give off some level of oil vapor, as well as other vapors (we...
Forum: Performance and Technical Chat 06-03-2016, 05:12 AM
Replies: 54
Views: 11,286
Posted By JFP in PA
At speed, your cam covers have a lot of oil in...

At speed, your cam covers have a lot of oil in them; add G=loads in corners and some of that liquid oil can get sucked into the AOS system (which has a vacuum line running to each cam cover). While...
Forum: Performance and Technical Chat 06-02-2016, 05:20 PM
Replies: 54
Views: 11,286
Posted By JFP in PA
Assuming that your AOS is working (max of 5...

Assuming that your AOS is working (max of 5 inches or water steady vacuum at the oil filler cap), you are always going to find the hose from the AOS to the intake coated in oil, that is simply a fact...
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