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Thread: tried towing with the 3.9!!!!!

  1. #21
    Homestar's Avatar
    Homestar is offline Super Moderator & CA manager Subscriber
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    Quote Originally Posted by jazzaD1 View Post
    i am rounding up the parts to do that exact thing, got the turbo, external wastegate, and intercooler at the moment, i still need to get some oil lines, intercooler piping, and then adapt it to my 3.5 V8

    i am hoping to have it done in a couple of months
    Cool! Let me know how it goes - I am very interested. Once you have it done, I'd love to come and look at how it all came together.

    Cheers - Gav
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

  2. #22
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    Whatever you do, don't ever drive a late-ish model 3.2 litre diesel Pajero...

    I've only towed a 5x8 open cage trailer with my new toy, 95 Vogue SE / 3.9 - but the fuel useage did'nt change toooo much....

    *Only* 10 or so litres extra for 200 km..

    Nor is it overly-endowed with power... a VW diesel van left me for dead at the lights last week... and after 2 km and LOTS of numbers on the speedo he was still drawing away.

    We have to face the reality that the 3.5 & 3.9 Rover/Buick V8 is at least 30 years behind the more frugal / more powerful V-6's of the last 5 to 10 years.

    Grumpy (but realistic) Old James in Gosnells.

    PS, - but would love to be proved wrong !

    The EH, Classic 95 Vogue SE with *working* Air suspension !

  3. #23
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    Just a quick thought whilst I was trawling through Atlantic British USA (nice exchange rate at the moment!)

    - would your oxygen sensors be past their use-by date ?
    - Dunno what the "reality" life-span is, nor whether data from elderly O2 sensors would affect power as much as fuel thirst.

    Cheers,

    James in G.

    The 'EH' 95 Classic Vogue with working EAS, and ABC.

  4. #24
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    timing issue

    thanks again for all the replies,

    tried setting the timing at the weekend, marked the 6 degree point to make it easier to see and got it spot on, Rangie then ran like a three legged donkey, struggled to get to 40kph away from the lights, tried again with the same result, never been anything like this bad before.

    then I read the plate on the engine, this said that due to the emissions control system the timing should be set to between 1 and 3 degrees, did that and we are well and truly away, has anyone had this?

    so if 6 degrees doesn't work try 2, it seems to have done the trick for me!

  5. #25
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    Quote Originally Posted by finallyrangie View Post
    thanks again for all the replies,

    tried setting the timing at the weekend, marked the 6 degree point to make it easier to see and got it spot on, Rangie then ran like a three legged donkey, struggled to get to 40kph away from the lights, tried again with the same result, never been anything like this bad before.

    then I read the plate on the engine, this said that due to the emissions control system the timing should be set to between 1 and 3 degrees, did that and we are well and truly away, has anyone had this?

    so if 6 degrees doesn't work try 2, it seems to have done the trick for me!
    To me it sounds like you marked the AFTER side to 6 degrees, you need to double check as you want the BEFORE side. The crankshaft '6' mark should be to the right of the TDC mark. I never met a RR which didn't run better at 6 to 10 degrees advance.

  6. #26
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    ditto
    It is virtually impossible for a RV8 NOT to make more power with more advance.
    The limiting factor is detonation.
    The reason it is 2degrees is all to do with emission regulations and reducing NOX which used to be a major concern back then as it is an ingredient of smog. Remember when people were concerned with smog?
    Regards Philip A

  7. #27
    mike 90 RR Guest
    Hand Turn the crank so the TDC marks are at the bottom
    Lay under the car and clean up the TDC markers with "wet n dry"
    You will notice that the markers go .... 12 6 T 6 12 .....
    grab a "white out pen" and put lines on the 9 degree spot

    Now start the motor and advance it to 9 degrees .... Fairly easy to work out if your going the right way ... because the motor picks up revs, as you move it towards the 9
    If it drops revs as you move towards 9 ... then you are retarding the motor ....

    .... Piston #1 is passenger side of motor ....

    You need to advance it ....



    Was the vacuum advance working? ... Did you check that the plenum side is not blocked?

  8. #28
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    thanks so much for the idiot guide, I'm the idiot who needed it, was indeed going the wrong way, everyone (non rover owners) told me after TDC, know better now thanks to you lot.

    getting pretty quick at setting the timing now, and at 6 degrees BEFORE TDC, and using the right plug for no1 (was on drivers side before), Rangie is now running better than I thought they could, new plugs and leads are next then we are ready for another go at towing the van!

    might try 9 degrees to, just to see how that goes!

    thanks again

  9. #29
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    Any advance on 6 degrees ? - Sorry, could'nt resist that !

  10. #30
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    thanks for all the quick replies, Rangie has done 215 ish ks, is that enough to need a freshen?
    Well if the oil has not been changed regularly, then the cam, lifters and timing chain will be well worn.
    I recently changed mine at 196KK and there is a really noticable difference in acceleration even though mine wasn't worn badly .

    There are many other performance robbing problems that can happen that are mainly due to poor maintenance.
    Some are- sticking exhaust valves ( miss under load)
    -seized centrifugal advance( check by seeing if the rotor turns say 15degrees and springs back),gives no advance at full throttle. Also can be checked by marking the front pulley at 30degrees and revving to 4000RPM.
    Are you getting full accelerator travel. Have someone floor it and see if the throttle blade opens fully. You would be surprised how often it doesn't. If not just adjust the cable.
    If it has never had a valve job at 215KK then the valves will be badly in need of a refinish.
    Check the compression. If it is below 150PSI then the engine is tired and will never give the best performance. ( this could be valves leaking but a wet test will check out the rings)
    Regard sPhilip A
    PS while I do not tow a heavy van. Mine will fly with my 600Kg camper on the back. Last weekend came up Mt Ousley near Wollongoing holding 80Kmh alternating between 3rd and 4th lockup, and strongly accelerated after a 40Kmh zone. Of course it drops down on the steep hills along that section but never under 80Kmh and I could hold 100Kmh if I wanted to drop to thrid.
    Last edited by PhilipA; 15th March 2011 at 08:08 AM. Reason: more info

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