Announcement

Collapse
No announcement yet.

General Q&A

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • General Q&A

    Hey, just wonderin', the fuel level sender is 240-33 ohms, correct? Also, what is proper boost/vacuum gauge for 7.3L, 30HG/45PSI, or 30/20, or 30/30? (how hard to install?)
    Thanks.
    Oh yea, how is pressure built up, pump comes on and comes up to, what, 75 psi? so pressure sensor is inline after pump? or is this pressure between tank & pump? how would oil fuel lines come up to pressure w/o putting wvo into fuel rails? please humor my ignorance!
    Last edited by captgrady; 08-18-2008, 10:43 PM.
    00' 7.3L Limited EX 4X4, V3 40g tank, Night Vision camera, Icom Ham radio, Urban Survival Vehicle
    Trailer w/90g tank & pump, for collection & trips.

  • #2
    Originally posted by captgrady View Post
    Hey, just wonderin', the fuel level sender is 240-33 ohms, correct? Also, what is proper boost/vacuum gauge for 7.3L, 30HG/45PSI, or 30/20, or 30/30? (how hard to install?)
    Thanks.
    Oh yea, how is pressure built up, pump comes on and comes up to, what, 75 psi? so pressure sensor is inline after pump? or is this pressure between tank & pump? how would oil fuel lines come up to pressure w/o putting wvo into fuel rails? please humor my ignorance!
    Capt- The fuel level sender is a 240 empty to 33 full ohm range. You only need a boost gage for the PSD, they NEVER operate under vacum like youwould see on a gasser. In stock or mildly modified trim a 0-35psi boost gage will be all you need. Only after some serious mdoficiatios will you ever see over 35. Word of cation though. From the facotry these trucks only make about 18psi of boost. But with the right defeats and programming the stock turbo "CAN" make over 30psi of boost. However running thm at anything over 25 regularly will grenade the turbo bushings in short order.

    Also, the pressure switch is in the manifold after the pump and secondary filter (so it can detect the condition of the WVO filter) but prior to the check valve so that it is not seeing the diesel pressure. I will be posting a hydraulic schematic of the V3 in the near future as well so that people can understand just how it ticks. Then you will be able to know WHY it is better than anything else, and not just assume it is. Cheers!
    1999 F-350 Lariat 7.3 385,000 miles and counting
    2000 VW Jetta 2.0
    1966 Jeep J-300 with EFI 351W

    Comment


    • #3
      Great! I can't wait to see the schematic. Lots of time people ask how the system works, and all I can say is that it does.
      Elvia the HandyMan
      2000 F350 7.3 XL Dually utility/service truck
      V3 March 2008

      Comment


      • #4
        Thanks so much Jason.
        I have a strange little thing going on. The V3 takes about 14 miles to come on, unless I put the A/C on max, then it comes on sooner. Also V3 sometimes turns off when in idle @ stop light, but only at first startup, (within 15 minutes,) then I switch the A/C to max or hit the throttle & it comes back on, then is good for the rest off the day. Do I need to tweak pressure sensor?
        Jason, I really want to thank you again, I got this running in the nick of time, it's my work/daily driver vehicle & with work slow right now, it's one overhead I don't have to worry about! & is keepin' my head above water.
        00' 7.3L Limited EX 4X4, V3 40g tank, Night Vision camera, Icom Ham radio, Urban Survival Vehicle
        Trailer w/90g tank & pump, for collection & trips.

        Comment


        • #5
          I won't say for sure, but it sounds like a thermostat replacement is due. Maybe its getting stuck at first then pops open. The symptoms you have sound like a heat problem. I think that if it comes on and off only when you first start driving, maybe its switching over too soon.
          Just a thought. I have the 203 degree thermostat and once I switch over )usually in 1.5 miles). it never turns back.
          Elvia the HandyMan
          2000 F350 7.3 XL Dually utility/service truck
          V3 March 2008

          Comment


          • #6
            Originally posted by Fordnut74 View Post
            From the facotry these trucks only make about 18psi of boost. But with the right defeats and programming the stock turbo "CAN" make over 30psi of boost. However running thm at anything over 25 regularly will grenade the turbo bushings in short order.
            So the stock turbos are physically limited to 18psi?

            Reason I ask is there have been a few times in my truck when climbing hills that the trans will downshift and the boost gauge will go up to almost 25-27 psi - this is on the stock gauge by the way. Never has hit 30, but the gauge does get up there.

            I've seen better than 20psi (22-23psi) quite often when downshifting to pass traffic.

            Maybe my gauge is off?

            Thanks!
            Greasin & Grinin
            Vegi oil powered since Aug 08
            2006 F-250 PSD - CC, Lariat, 4X4 - Vegistroke converted 1/27/13!!
            2008 F-250 PSD - CC, Lariat, 4X4 - Sold
            2005 F-250 PSD - CC, Lariat, 4X4 - Sold

            Comment


            • #7
              Your turbo will make almost 30psi... from the factory, Ford won't let it go that high though. They limit it to about 18psi.

              If you have a tuner, you could see pressure above 25psi no problem.

              The turbos that come on these trucks lose efficiency after 20-24psi, so if you plan on boosting it more and not blowing anything up, get a bigger turbo.
              Vegistrokin since 08/23/08

              Comment


              • #8
                Marv- Your gage may be off, or it may not. Unless you have had the truck from new it is hard to tell whether or not the PCM has been reprogrammed with a performance tune. From the factory there are three safety's that prevent the truck from overboosting. One is the wastegate solenoid. That little bundle of vacum hoses on the front of the intake spider controls the wastegate actuator by allowing manifold boost pressure to actuate the wastegate bypassing exhaust around the turbine reducing boost. This action is controlled by the PCM based off readings from the MAP sensor. Overboost control #2 is the adjustment of the wastegate actuator rod. This adjustment puts preload on the wastegate and is often set to allow the wastegate to open by mechanical force by overriding the spring tension in the wastegate actuator, even if the PCM has not activated it(or say you unplugged that little red line going to it). The third control measure in place is that the PCM will defuel the truck if it sees boost over about 20psi for more than a few seconds, and cause a SES light. All of this can be somewhat easily defeated to allow the truck to make more than 18psi of boost, but bone stock truck simply will not go over 18 but for rare situations and briefly at that. SO long as you are not seeing sustained boost above 25psi I wouldn't worry about a thing.
                1999 F-350 Lariat 7.3 385,000 miles and counting
                2000 VW Jetta 2.0
                1966 Jeep J-300 with EFI 351W

                Comment


                • #9
                  Originally posted by Marv View Post
                  So the stock turbos are physically limited to 18psi?

                  Reason I ask is there have been a few times in my truck when climbing hills that the trans will downshift and the boost gauge will go up to almost 25-27 psi - this is on the stock gauge by the way. Never has hit 30, but the gauge does get up there.

                  I've seen better than 20psi (22-23psi) quite often when downshifting to pass traffic.

                  Maybe my gauge is off?

                  Thanks!
                  Jason is talking about a 2000 7.3, they had a smaller turbo, quite a bit different from yours.

                  Comment


                  • #10
                    Originally posted by Jack_Toepfer View Post
                    Your turbo will make almost 30psi... from the factory, Ford won't let it go that high though. They limit it to about 18psi.

                    If you have a tuner, you could see pressure above 25psi no problem.

                    The turbos that come on these trucks lose efficiency after 20-24psi, so if you plan on boosting it more and not blowing anything up, get a bigger turbo.
                    Ah, I got ya. Wastegate I take it?
                    Greasin & Grinin
                    Vegi oil powered since Aug 08
                    2006 F-250 PSD - CC, Lariat, 4X4 - Vegistroke converted 1/27/13!!
                    2008 F-250 PSD - CC, Lariat, 4X4 - Sold
                    2005 F-250 PSD - CC, Lariat, 4X4 - Sold

                    Comment


                    • #11
                      Originally posted by CHenry View Post
                      Jason is talking about a 2000 7.3, they had a smaller turbo, quite a bit different from yours.
                      or maybe not...i'll shut up now.

                      I see 24-25 psi in stock mode pretty regularly.
                      29-30 with my tunner

                      Comment


                      • #12
                        Originally posted by CHenry View Post
                        Jason is talking about a 2000 7.3, they had a smaller turbo, quite a bit different from yours.

                        Oh okay...I got ya. I think I'm on the same page now.

                        Jason, thanks for the details by the way!
                        Greasin & Grinin
                        Vegi oil powered since Aug 08
                        2006 F-250 PSD - CC, Lariat, 4X4 - Vegistroke converted 1/27/13!!
                        2008 F-250 PSD - CC, Lariat, 4X4 - Sold
                        2005 F-250 PSD - CC, Lariat, 4X4 - Sold

                        Comment


                        • #13
                          Originally posted by CHenry View Post
                          or maybe not...i'll shut up now.

                          I see 24-25 psi in stock mode pretty regularly.
                          29-30 with my tunner
                          Haha...man, don't worry about it. I'm a bit "turbo ignorant" really - first vehicle I've owned that's got one.
                          Greasin & Grinin
                          Vegi oil powered since Aug 08
                          2006 F-250 PSD - CC, Lariat, 4X4 - Vegistroke converted 1/27/13!!
                          2008 F-250 PSD - CC, Lariat, 4X4 - Sold
                          2005 F-250 PSD - CC, Lariat, 4X4 - Sold

                          Comment


                          • #14
                            Clay- Thank you for catching that. . Here I am stuck in my own little 7.3 world again....
                            1999 F-350 Lariat 7.3 385,000 miles and counting
                            2000 VW Jetta 2.0
                            1966 Jeep J-300 with EFI 351W

                            Comment


                            • #15
                              There is another world besides 7.3ville..........grease out
                              2000 7.3X V3 So much fun,so little time,Support small Oil,burn WVO,Free and greasy down the road I go!!!!!!!!!!completely self sufficient and proud of it. (Wood furnace.....X.......solar pontoon....solarsheat twins this summer.....I don't Know much.......I'm just a hillbilly with too many guns..............

                              Comment

                              Working...
                              X