Announcement

Collapse
No announcement yet.

Dobinsons Monotube Remote Reservoir Shock Absorbers

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

  • #31
    Originally posted by peter_mcc View Post
    Hmmmm, that doesn't sound good! I've got them installed - what measurements can I do to help? Where do I measure from/to? I can easily measure it on the ground and with the suspension at full extension. I'm not sure how I'd do full compression...
    Hey Peter,

    You could try calling Ben Dobinson in Rockhampton, and ask him exactly what closed/open lengths you have based on the part codes you have.

    You won't be able to measure fully compressed while it's all together, the coils will hold it up. You can measure your open length at full droop, just grab a torch and look inside the strut tower at the top. When you can see where the bottom washer is, measure from there to center of bottom ring eye.

    Hope this helps!

    Best

    Mark
    2006 GXL petrol auto. ARB deluxe bar x3 HID IPF's, ARB alloy roofrack, ARB awning, BFG A/T, Safari snorkel, Piranha breathers, Pacemaker extractors, custom Ironman 45710FE 436-569mm with Dobinsons 350, custom Ironman 45682FE 383-618mm with Dobinsons 487, Firestone kevlar 60psi airbags, 30mm extended Roadsafe links, AMTS bashplate and recovery points, ABR Flyer with Powersonic AGM.

    Comment


    • #32
      Originally posted by Dominator View Post
      Thanks for the reply ####. I have come from a Patrol to the Prado so I am still learning the finer points of IFS.
      I under stand the spring provides the lift, I just thought you would have a longer strut to go with the higher ride height to prevent the strut from topping out too soon.
      Hey Dominator,

      Welcome to the problematic world of IFS!

      You are spot on about topping the struts out, if you lift on the OEM lengths, you won't have much droop, and you'll easily top the struts out going around roundabouts and over speed bumps etc.

      This is for 120's, but you can see the effects of lifting without using longer struts here;

      http://www.pradopoint.com/showthread...-Prado-120-IFS

      You will lose a lot of droop, something like 50mm if you lift 2" on OEM open length.

      Using the rule of thumb from #### to prevent CV damage (tripod disengaging under load), no more than 15mm longer than OEM length, would give you 555+15 = 570mm open length, and another 15x2.2 = 33mm droop at the wheel. Keep in mind the leverage ratio works in your favor, with a measured 2.2:1 ratio on the 120 Prado IFS.

      Keep in mind the CV binding limit for the 150 is somewhere in between 585-590mm, so maximum open length you can use is around 10mm under this with a safety margin, so around 575mm, which works out pretty close to the rule of thumb from ####.

      I would call Dobinsons and see if the new MRR range goes out to this sort of open length.

      It's a fortuitous geometry for the 150 that satisfies the #### rule of thumb (within 5mm) and stays underneath the CV binding limit by 10mm. It is because the open length of the OEM strut for the 150 is 555mm.

      For the 120 series, the OEM open length is 540mm, much shorter! On the 120, CV bind is around 580mm, so many folks run a 570mm open length strut to maximise travel, but this is well over the #### rule of thumb with 540+15 = 555mm being the limit for 120 series.

      I run a 570mm open length strut on my 120, but I'm well aware of the experiments that #### has done, and I drive accordingly. If I get a front wheel in the air which tops out, I back off the accelerator quickly and pick a different line. There's still a chance I'll pop a tripod one day, as you can't keep an eye on everything all the time, but if I do it's my problem!

      This is also a bit of a grey area with several strut manufacturers. As an example, you used to be able to buy 570mm open length struts for the 120 series from ARB (N140S), Lovells (64610087F) and several others. These companies have now changed their strut maximum open length and reduced well below 570mm. It is getting more and more difficult to get long travel struts in Australia.

      However, this "grey" area has not stopped the development of a massive after market in the USA, where many drivers want to turn their FJ Cruiser or Tacoma into a desert racer. There you can purchase lower control arms that are 2" or 3" longer than the OEM arms, Total Chaos or Camburg. With the leverage ratio working in your favor again, a longer lower control arm means more droop at the wheel, and some are getting 12-13" of wheel travel on the OEM IFS geometry. The struts they use are longer travel again than what is possible with OEM arms.

      These desert racers punish their cars and are driving through whoops at well over 100km/h, and they are regularly jumping the vehicles, and the front CV's take an absolute pounding under load. I don't know what the CV failure rate is like, but I'm sure there are plenty! I'm also sure there are plenty who don't break CV's.

      Many rock crawlers are also using these longer lower arms. The front flex looks incredible with these setups, eg see here;

      http://www.lastgreatroadtrip.com/tag...ideas/page/11/

      This "grey" area in between where the tripod will disengage under load, and where the CV will bind at maximum strut travel is not often discussed, and I think it needs to be discussed more here on PP.

      I'm always thinking of this "grey" area when I watch All4Adventure episodes. I constantly see lifted front wheels on their 200's spinning their heads off, and I'm amazed they haven't broken a CV yet. Maybe they have and they just haven't shown it on the show. One thing that is noticeable is that the EFS suspension they use is definitely not long travel, as they also regularly lift rear wheels, so they are very likely within the #### rule of thumb for the 200 series IFS.

      If you do decide to use long travel struts into the "grey" area, then you will come across other issues such as the upper ball joint binding, CV boot binding, upper ball joint contacting front coils etc. You can get around these issues with after market upper control arms, SP light racing arms help a lot here as an example, or you can go with uniball arms if you're adventurous!

      Plenty to consider when you think about IFS, definitely a few more complications than your old Patrol front live axle setup!

      Hope this gives you plenty to chew over!

      Best

      Mark
      2006 GXL petrol auto. ARB deluxe bar x3 HID IPF's, ARB alloy roofrack, ARB awning, BFG A/T, Safari snorkel, Piranha breathers, Pacemaker extractors, custom Ironman 45710FE 436-569mm with Dobinsons 350, custom Ironman 45682FE 383-618mm with Dobinsons 487, Firestone kevlar 60psi airbags, 30mm extended Roadsafe links, AMTS bashplate and recovery points, ABR Flyer with Powersonic AGM.

      Comment


      • #33
        Originally posted by Anth120playdo View Post
        Hey Andrew,

        Yes correct, for the 120 series. The 150 series is 10mm longer. Approximately 550mm stock.

        Cheers.
        Thanks for the reminder. I was looking at the 120 data. Is the 150 550 or 555mm open length (just want to confirm)?

        Comment


        • #34
          Originally posted by amts View Post
          Thanks for the reminder. I was looking at the 120 data. Is the 150 550 or 555mm open length (just want to confirm)?
          From memory, years since I measured one, it s 550. I have some there to check if anyone thinks 550 may not be correct.

          Edit:
          I then read mark saying 555.
          So I just measured a 150 stock strut & it's 555mm. So mark is correct!
          Anth120playdo
          Banned
          Last edited by Anth120playdo; 06-11-2015, 07:18 PM.

          Comment


          • #35
            Originally posted by Anth120playdo View Post
            From memory, years since I measured one, it s 550. I have some there to check if anyone thinks 550 may not be correct.

            Edit:
            I then read mark saying 555.
            So I just measured a 150 stock strut & it's 555mm. So mark is correct!
            Hey ####,

            Good job, I was fishing around trying to find my old notes as I didn't have a 150 strut handy. Always good to have some measurements double checked by someone else!

            Just for clarification in case anyone reads this later on, the Prado/FJ chassis (120 evolved into 150, and FJ is a 120/150 hybrid) has the following;

            120 series OEM strut lengths: 420-540mm; 120 series CV bind = 580mm

            150 series OEM strut lengths: 432-555mm; 150 series CV bind = 585-590mm

            FJ Cruiser OEM strut lengths: 433-540mm; FJ Cruiser CV bind = 590mm

            So the "grey" (risk of CV damage) zone I referred to above for strut open length is then 555-570mm for 120 series, 570-575mm for a 150 series, and 555-580mm for an FJ Cruiser.

            I'm relying on someone else's CV binding measurements for the 150, which is why it is listed as 585-590mm. If you get a chance ####, perhaps you can pin the CV binding length down more accurately for the 150.

            It's always handy to know the long travel open length limits, just in case you come across a strut that has open length longer than the CV binding limit, which will need a limiting strap.

            Best

            Mark
            2006 GXL petrol auto. ARB deluxe bar x3 HID IPF's, ARB alloy roofrack, ARB awning, BFG A/T, Safari snorkel, Piranha breathers, Pacemaker extractors, custom Ironman 45710FE 436-569mm with Dobinsons 350, custom Ironman 45682FE 383-618mm with Dobinsons 487, Firestone kevlar 60psi airbags, 30mm extended Roadsafe links, AMTS bashplate and recovery points, ABR Flyer with Powersonic AGM.

            Comment


            • #36
              Today I took a few pics of the Dobinsons combo in front of a 2012 150, was in for 80k service & egr work.
              They have been hammered for 50,000k. Still drives well & dampening is excellent.
              Travel is perfect, the UCA stops right next to the coil without hitting it.
              Good c/v angle.
              You can't really go past this gear! Why pay more?
              Just saying..............





              Yes he needs to wash his vehicle. Busy is no excuse

              Comment


              • #37
                Anyone have any recent updates on these?

                Comment


                • #38
                  I've got them. They work well. Did you have any specific questions?

                  I find the car a little harsh on small bumps but it's great going over speed humps at high speed... I'm not sure if that's the shocks, springs or tyre pressures - one day I'll investigate

                  Comment


                  • #39
                    Originally posted by peter_mcc View Post
                    I've got them. They work well. Did you have any specific questions?
                    What springs have you got, and what accessories?
                    2008 D4D M6 GXL [MT ATZ-P3][Whitey's Ironman 45710FE/45682FE+KTFR101H/Dob487][extended Roadsafe links][Polyairs][DBA T3/T2][amts diffdrop & recovery points][Tin175's stone guards][Bushskins BashPlate][ARB Sahara][IPF 900s][Snorkel][WindCheetah][MaxTrax][IC-440][Parrot Asteroid][ARB Fridge][Lifestyle 2nd Row Fridge Mount][ARB Compressor][Thumper][SandGrabbers][Cargo Barrier][Tigerz Awning][MCC Rear Bar]

                    Comment


                    • #40
                      Also curious about springs, I've got an alloy bar with no winch but dual batteries so I'm not too sure what spring rate would suit.
                      I don't mind a firm ride but it still needs to be comfortable as a daily.

                      Mainly curious how they ride loaded/unloaded and over corrugations.

                      Comment


                      • #41
                        They are blue ones

                        Fronts are C59-352 - Linear Rate, Raised Height (45mm Lift) 50-100kgs Accessories (Bull Bar & Winch)
                        Rears are C59-327 - Linear Rate, Raised Height (45mm Lift), 100 - 300Kg to GVM

                        On the front I have an AFN bar, Runva 11XP winch, light bar, 2 HID spotties and an extra battery. The AFN bar is fairly light - they claim 44kgs.

                        On the back I have a towbar used with a Tvan (about 125kg ball weight). I told them we had about 100kgs in the car while towing.

                        It's great when it's full of stuff and it soaks up large bumps really really well. I don't need to slow down for the speed humps near work even when empty.

                        The problem (for want of a better word) is when it's empty on small sharp edged bumps - like older concrete roads where the sheets of concrete jump up and down a bit - then it is a bit harsh. It's also got 10 ply light truck Toyo AT tyres on it which probably doesn't help that.

                        Comment


                        • #42
                          Sounds like you're pretty happy with them then.
                          Did you install them yourself or by a shop? Also where are your front reservoirs secured?

                          Comment


                          • #43
                            I got Dobinsons Sydney to install them - I was short of time and thought that would be quicker.

                            The front reservoirs are bolted to the top of the chassis rails in the engine bay. I'll try and take a photo later but they are quite hard to see.

                            The rears are mounted on the inside of the chassis rails towards the back of the car. Just make sure the hose doesn't go between the chassis & body - otherwise it will get cut like mine did (see post 18 in this thread).

                            If anybody wants to come and take a look or test drive send me a PM - I'm in the lower North Shore of Sydney (between Chatswood and North Sydney)

                            Comment


                            • #44
                              Repost from the Bilstein and Kings spring thread. Was dragging it off topic.

                              Originally posted by Whitey View Post
                              Hey,

                              When you say "pogo", do you mean the Prado is pitching back and forth along the axis of the car, or do you mean straight/up down bounce?

                              It's likely a combination of two factors, i) a mismatch in your suspension frequency, which typically occurs when the front spring rate is too high compared to the rear...a very common issue in Prados, and ii) your 712/713 combo is flogged and the rebound damping is shot and the spring is banging back hard and bouncing. It's easy to test, just set up some speed bumps that are around wheelbase apart in length, and drive over them at around 10-20km/h. When the pitching starts, see how many cycles it takes to damp out. I noticed when I had 712/713 that this was particularly bad, and they couldn't cycle out a pitching surfboard, let alone a big heavy Prado.

                              The rebound damping on the 712 is 1000N lower than some other Bilstein struts that you can use. The powers that be say 712 is valved to Australian conditions, however, I know many are running much stiffer struts on 120/150/FJ and are very happy with the ride quality.

                              The 713 really shouldn't be used in a lifted vehicle, it has less travel than the OEM rear shock, and you end up with minimal droop on the rear, and a common complaint with 713 will be oil leaks from top outs.

                              Considering the issues you've had, you might want to look at something which has tuneable valving...the MRR don't as far as I know? Maybe Profender? FOX or Icon if you have the coin.

                              The 712/713 combo is a long way off the limits of the Prados suspension geometry, so you might want to consider some longer travel gear for your upgrade!

                              Best

                              Mark
                              Straight up and down bounce at the front. Takes 3-4 cycles to settle down. Rear behaves, no sign of leaks (713 with airbags).

                              Springs are ridepro medium. Prado has front and rear bars, dual spare wheels, no winch. Will probably swap them out, maybe Dobinson 314/327.

                              The measurements I have say the A713 has 580mm extension vs standard 575.

                              Standard Dobinson 120 MRR's are F: 427-560, R: 362-583 so 44mm extra wheel travel at front and 8mm at rear over standard.

                              MRR Rear shock options MRR LC80 is 603 (+28mm), MRR 60701 is 615mm (+40mm)

                              MRR's are revalveable back at the Dobinsons dealer, but not by the owner. A set of MRR shocks are around $1300, way less than on vehicle adjustables.
                              2008 D4D M6 GXL [MT ATZ-P3][Whitey's Ironman 45710FE/45682FE+KTFR101H/Dob487][extended Roadsafe links][Polyairs][DBA T3/T2][amts diffdrop & recovery points][Tin175's stone guards][Bushskins BashPlate][ARB Sahara][IPF 900s][Snorkel][WindCheetah][MaxTrax][IC-440][Parrot Asteroid][ARB Fridge][Lifestyle 2nd Row Fridge Mount][ARB Compressor][Thumper][SandGrabbers][Cargo Barrier][Tigerz Awning][MCC Rear Bar]

                              Comment


                              • #45
                                In terms of wheel travel, is it a fair assumption that if the front is extended by 44mm, the rear should be in the same league?

                                That would mean going for the 60701's (+40mm) on the rear. The 120 would handle that without dragging on sway bar links or brake lines?

                                Cheers,
                                2008 D4D M6 GXL [MT ATZ-P3][Whitey's Ironman 45710FE/45682FE+KTFR101H/Dob487][extended Roadsafe links][Polyairs][DBA T3/T2][amts diffdrop & recovery points][Tin175's stone guards][Bushskins BashPlate][ARB Sahara][IPF 900s][Snorkel][WindCheetah][MaxTrax][IC-440][Parrot Asteroid][ARB Fridge][Lifestyle 2nd Row Fridge Mount][ARB Compressor][Thumper][SandGrabbers][Cargo Barrier][Tigerz Awning][MCC Rear Bar]

                                Comment

                                canli bahis siteleri bahis siteleri ecebet.net
                                mencisport.com
                                antalya escort
                                tsyd.org deneme bonusu veren siteler
                                deneme bonusu veren siteler
                                gaziantep escort
                                gaziantep escort
                                asyabahis maltcasino olabahis olabahis
                                erotik film izle Rus escort gaziantep rus escort
                                atasehir escort tuzla escort
                                sikis sex hatti
                                en iyi casino siteleri
                                deneme bonusu veren siteler
                                casibom
                                deneme bonusu veren siteler
                                deneme bonusu veren siteler
                                betticket istanbulbahis
                                Working...
                                X