what gear? sand?





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  1. #1
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    Question what gear? sand?

    howsit, on a recent trip to jakkalskloof i really searched for the right gear, the sand trail has some good sand hills, and are quite challenging! i got up the biggest dune in 2nd low, is this the right gear to use, will 3rd be alright? i dont want to run highish revs all the time in dunes, 2nd low is still really low. and is diff-loc a good thing to use in sand climbs?
    sorry for all the silly questions, but im now really getting into 4x4ing, making time for it.
    thanks
    jono

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    First and most important......which vehicle, i.e. engine?

    Use the difflock as much as possible!

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    it is a isuzu 300tdi, new shape.

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    jonoB

    Sand driving can be great sports.
    There are a couple of things to take into consideration ie. type of sand(fine, coarse, wet dry) tyres(amount of deflation), temperature(as you driving in sand the tyres heat up therefore your pressure goes up, check every now and again your pressures) etc. This all play a part in choosing the right gear and prevent any slauhtering of the motor. The idea is to "float" on top of the sand and prevent digging in. Keep on playing around in the sand and soon you will know wich gear to use.

    98 Hilux D/C 2.4P

  5. #5
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    dont want to run highish revs all the time in dunes
    I've discovered since converting to diesel that when driving on sand I have to rev the hell out of it to keep the boost up.

    I was concerned at first but since fitting my EGT guage I've discovered that the motor is happier doing that.

    It took me quite a few sand trips before I got used to the diesel. I battled at first. So hang in there and do more trails. Deciding on what gear you need will come naturally. It's been a year and I'm still learning the diesel.
    Last edited by Spike; 2007/05/23 at 08:19 AM.
    * "Wat Spike probeer sÍ in sy min woorde" -Die Skim "
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  6. #6
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    Quote Originally Posted by Spike View Post
    I've discovered since converting to diesel that when driving on sand I have to rev the hell out of it to keep the boost up.

    I was concerned at first but since fitting my EGT guage I've discovered that the motor is happier doing that.
    thanks to all for the input, spike as you said the engine is happier being revved, is this because your are not labouring the engine, but revving it freely? since their is no load, their should not be any labouring?

  7. #7
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    Correct. The more I rev it the more the EGT's come down.

    Before I had the guage fitted I was a nervous wreck. And I was getting stuck a lot because of wrongly thinking that my EGT's were going to be too high.
    * "Wat Spike probeer sÍ in sy min woorde" -Die Skim "
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  8. #8
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    spike, what size tires do you have? on monday im buying bfgoodrich a/t's, how much bigger is a 30" than a 245/70R/16?

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    * "Wat Spike probeer sÍ in sy min woorde" -Die Skim "
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  10. #10
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    Cool site Spike, my 265/75 R16 BGF All Terrain K/O on the Landy are close to 32" or 31.67". Good to know
    Currently: 2009 Mitsubishi Triton 3.2 D/C 4x4
    Previously: 1996 LR Defender 110 V8



  11. #11
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    32" or 31.67"
    That was before they were worn smooth

    edit: just teasing. it was pitch dark.
    Last edited by Spike; 2007/05/24 at 07:32 PM.
    * "Wat Spike probeer sÍ in sy min woorde" -Die Skim "
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    Sheez ja, they are not looking so hot. Bought the vehicle with them on, they are street legal but I wonder when they start sucking offroad. Worst wear is on the corners.
    Currently: 2009 Mitsubishi Triton 3.2 D/C 4x4
    Previously: 1996 LR Defender 110 V8



  13. #13
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    i like the idea of 255's, i will get a little more clearance, but will not lose any performance. what tires do you get in this size? perhaps a BFG a/t?

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    Whilst driving in challenges, we've come up with a easy three step plan for obstacles:

    1ste rat en gooi mielies
    2de rat en bliksem hom
    3e rat en bid

    Moet byse, dit is vir 'n baie modified cj2a met 'n ford enjin wat tot 8000 kan rev.

  15. #15
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    I've newer used 4L in sand. My Colt 2.8 runs like a dream on sand in Moz. Most of the time in 4x2. I only switch to 4H when there is a big incline.

    Main thing with sand is to keep it smooth.
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    Quote Originally Posted by Spike View Post
    Correct. The more I rev it the more the EGT's come down.

    Before I had the guage fitted I was a nervous wreck. And I was getting stuck a lot because of wrongly thinking that my EGT's were going to be too high.
    Good to know - also don't (didn't like reving the baki) but looks like I'll start reving it a bit more in future (don't have EGT yet) How much is reving it & in what gear.


    Hein

    Mazda Drifter 2.5TD D/Cab 4x4 "BURAWA"

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    How much is reving it & in what gear.
    I don't get too theoretical about it. Don't make a note of what revs/gear. I just drive it that the vehicle feels comfortable.

    You'll know when it's revving too much. My Colt dies before redline. That's when to tap off
    * "Wat Spike probeer sÍ in sy min woorde" -Die Skim "
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  18. #18
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    Interesting that higher revs give lower EGT's. Maybe the extra air/gas flowing thru the head / manifold removes more heat...?

    Bit like volla engine really - gotta keep the revs up to keep the fan turning

  19. #19
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    JonoB, the Isuzu guys (AND GIRLS) down in Cape Town frequently visit Atlantis....

    Isuzuoffroad.co.za

    Talk to Dietrich, he might just be able to help you with diesels and sand driving
    Sakkie Coetzee

    Some people say I have a "short temper"....I see it as swift and assertive reaction to Bull!

  20. #20
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    thanks sakkie, do you get 255/70R/16's in the BFGoodgich A/T? and will i notice a performance loss?
    Current: Toyota FJ Sport Cruiser

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