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Thread: Lucky 8's Project P38

  1. #41
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    Quote Originally Posted by FiveSPDDisco View Post
    We just went off of a P38 that was sitting on stock air suspension for our standard height mark. Does anybody know what the correct measurement is from Land Rover?
    Just for giggles let's do a comparison between our two trucks. From the center of the rim to the bottom of the fender in the front and in the rear what are you getting?

    Now take a level across the top of your tire to the ground what measurement do you get?

    Ill do the same
    I measured as you requested from the centre of the rim up to the liner at the top of the wheel well on the front axle and the measurement there is 21.85” (555mm). I then measured from the centre of the rim up to the liner at the top of the wheel well on the rear axle and the measurement there is 22.36” (568mm). Finally I measured with a level from the top of the tyre to the ground with 36psi pressure in the tyres and a full tank of fuel and the measurement there is 31.89” (810mm).

    I haven't found a measurement from Land Rover but on Alan Bates' website (tech articles) he states that “According to Atlantic British, the height of a P38 in standard ride height with stock tires measured from the ground to the top of the wheel well is 31-3/4” in the front, and 32” in the rear.”

    If I measure from the ground to the top of the wheel well as Alan Bates suggests then the measurements from the ground to the top of the wheel well are 37.2” (945mm) on the front axle and 37.8” (960mm) on the rear axle. If we then subtract the measurement of a standard ride height with stock tyres then we get a total lift of 5.4” (138mm) on the front of my vehicle and 5.8' (147mm) on the rear. Subtracting the radius of the 255 65 16 tyre which is 14.5” (369mm) from the 285 75 16 tyre which is 16.4” (417mm) giving us a tyre lift on the vehicle of 1.89” (48mm) which gives us a measurement of 3.54' (90mm) spring lift on the front axle and a 3.9” (99mm) spring lift on the rear axle.

    For those of you that read the post about the initial lift of the vehicle, I have since given the vehicle a bit more lift.

    Below is a picture of the "castrated" beast (according to PaulP38a ) for reference and comparison.


  2. #42
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    When I get home ill measure mine in high. Probably wont come close to those numbers but will give me an idea of how much lift my tyres and programming have netted me!
    Last edited by p38arover; 8th January 2013 at 02:45 PM. Reason: deleted swear filter dodge.

  3. #43
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    Quote Originally Posted by PaulP38a View Post
    EAS Standard Mode height for a stock P38 is approx 470mm from centre of wheel cap to underside of the guard/fender, measured at a front corner. Rears should be 10-20mm higher.

    Cheers, Paul.
    Thank you for posting. HHmmmm very interesting. I'll post my results up in a second

  4. #44
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    Quote Originally Posted by p38oncoils View Post
    I measured as you requested from the centre of the rim up to the liner at the top of the wheel well on the front axle and the measurement there is 21.85” (555mm). I then measured from the centre of the rim up to the liner at the top of the wheel well on the rear axle and the measurement there is 22.36” (568mm). Finally I measured with a level from the top of the tyre to the ground with 36psi pressure in the tyres and a full tank of fuel and the measurement there is 31.89” (810mm).
    Thank you very much for doing this. Take a look at my results

  5. #45
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    Quote Originally Posted by p38oncoils View Post
    Below is a picture of the "castrated" beast (according to PaulP38a ) for reference and comparison.

    We put some 32s on the L8 P38 and these trucks look very similar. I'll post those pictures up soon

  6. #46
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    Project help please

    If anybody has access to a P38 with stock suspension could you take some measurements for us?
    I would love to know the measurements in standard mode from the center of the wheel to the bottom of the fender front and rear please.

    This is what we currently have on our project.
    The front

    21.5 inches

    The rear

    22 inches.

    Just for reference the 305/70/16 tires on the truck

    32 3/4 inches

    Thank you for your help

  7. #47
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    Quote Originally Posted by FiveSPDDisco View Post
    Project help please

    If anybody has access to a P38 with stock suspension could you take some measurements for us?
    I would love to know the measurements in standard mode from the center of the wheel to the bottom of the fender front and rear please.
    I took the liberty of converting the metric measurements that PaulP38a gave in his post to imperial measurements (in brackets). Regards, Omar

    According to PaulP38a: "EAS Standard Mode height for a stock P38 is approx 470mm (18.5") from centre of wheel cap to underside of the guard/fender, measured at a front corner. Rears should be 10-20mm higher." (+10mm = 480mm is 18.9". +20mm = 490mm is 19.3")

    "Mine is approx 520mm (20.47") on EAS Standard Mode, or 940mm (37") from the ground to underside of the guard. EAS High Mode is approx 570mm (22.44").

    Unlike your castrated P38's, I can drop mine down to 410mm (16.14") to allow access in to car parks and garages (as long as I don't want to steer in any direction other than straight)

    Cheers, Paul."

  8. #48
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    Quote Originally Posted by p38oncoils View Post
    I haven't found a measurement from Land Rover but on Alan Bates' website (tech articles) he states that “According to Atlantic British, the height of a P38 in standard ride height with stock tires measured from the ground to the top of the wheel well is 31-3/4” in the front, and 32” in the rear.”
    It's only been 43 years since Australia converted to the Metric system but we can do it that way for fun

    Atlantic British either have been misinformed or NAS P38's have smaller OD tyres than Australian... but I don't think so.
    29" (737mm) tyres were standard on Australian P38's, so on EAS Standard Mode the distance from ground to bottom of wheel arch/fender is 33" (838mm).

    To recap what has been covered may times before, for a stock P38:
    • EAS Standard Mode is 18.5" (470mm) from centre of wheel cap to underside of front wheel arch/fender, therefore 33" ground to underside of wheel arch;

    • EAS Access Mode is 2.56" (65mm) below Standard;

    • EAS Low/Highway Mode is 1" (25mm) below Standard;

    • EAS High/Wading Mode is 1.57" (40mm) above Standard.


    So, in response to FiveSPDisco's request, the measurements you want are:
    • At EAS Standard Height, distance between centre of wheel cap and underside of wheel arch - 18.5" front, 18.8" rear

    • Tyre diameter - 29"


    I also have a stock P38, and these dimensions were correct last time I checked (after fitting Gen III's). Can't check it at the moment due to lack of flat ground and a broken Toyota Soarer (Lexus SC400 in American speak) and bits of its engine taking up most my garage.

    Cheers, Paul.
    My toys, projects and write-ups at PaulP38a.com

  9. #49
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    Quote Originally Posted by PaulP38a View Post
    It's only been 43 years since Australia converted to the Metric system but we can do it that way for fun
    .
    I dont know how to translate but consider..

    My Balls busted

  10. #50
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    Quote Originally Posted by PaulP38a View Post
    To recap what has been covered may times before, for a stock P38:
    • EAS Standard Mode is 18.5" (470mm) from centre of wheel cap to underside of front wheel arch/fender, therefore 33" ground to underside of wheel arch;

    • EAS Access Mode is 2.56" (65mm) below Standard;

    • EAS Low/Highway Mode is 1" (25mm) below Standard;

    • EAS High/Wading Mode is 1.57" (40mm) above Standard.

    Were did you find this? I dont see it in RAVE.

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