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Thread: repowering a RRC, thinking about a 4JB1..

  1. #31
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    And if you want a measure of petrol vs diesel off road performance. Just go to a moderate to high level 4WD Comp. 80% of the front runners will be EFI V8s.

  2. #32
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    Quote Originally Posted by Wombat74 View Post
    And if you want a measure of petrol vs diesel off road performance. Just go to a moderate to high level 4WD Comp. 80% of the front runners will be EFI V8s.
    Maybe so, but it's hardly a real world measure, is it? Who drives like that day to day?
    ​JayTee

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    ​Getting involved in discussions is the best way to learn.

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  3. #33
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    From what I see on the M1 most days, the majority of 4wd drivers.

  4. #34
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    Quote Originally Posted by gavinwibrow View Post
    Having just read about the UK Strange Rover, what about the 3.5L Mazda inter-cooled turbo diesels?
    I had one of these to put in my old rangie as the conversion kit was off the shelf, opted to go the isuzu as one fell in my lap basically and it was a proven thing.
    At the same time i was putting an LS in my county, scrapped it due to the cost of the conversion, kinda glad i did now.

  5. #35
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    mazda 3.5T

    Hi,
    my old 101 camper had the Mazda 3.5 turbo motor in it and it went very well indeed re power and torque and used to get 14-16ltrs/100 on a trip fully loaded. It had the Samurai conversion and the standard 4 speed --I had driven other 101 campers and this one did perform and I suppose you could easily use the 4ltr Mazda version as well, and motors also in Ford Trader trucks so a few out there--just depends what you have access too.
    Alan

  6. #36
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    repowering a RRC, thinking about a 4JB1..

    Hi,
    Back in 1987 I had a 2 door RR with a 4.4 P76 motor. After owning it for about 5 years & a lot of Ks I fitted a V8 diesel out of a Oldsmobile. I think it was a 5.7. Driving it was not a lot of different from the petrol motor, but the miles per gallon was about a 1/3 better. I had to fit heavier springs up front. At the same time a friend had the 1st of the 4 door RR & he fitted a 4BD1. The difference was a lot heavier than the diesel V8. I can remember when we lowered it onto the engine mounts it almost went down to the bump stops. We both noticed that the RRs did not handle as well in the wet as before & the handling on the sand on Fraser Island was much worse. I think whichever way you go I would make sure to go with the lightest motor whether it be diesel or petrol to keep the balance of the car. I love my 4BD1T in my 6x6. I would be hesitant to put it in a Range Rover.
    Paul.

  7. #37
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    Quote Originally Posted by powerband View Post
    Hi,
    Back in 1987 I had a 2 door RR with a 4.4 P76 motor. After owning it for about 5 years & a lot of Ks I fitted a V8 diesel out of a Oldsmobile. I think it was a 5.7. Driving it was not a lot of different from the petrol motor, but the miles per gallon was about a 1/3 better. I had to fit heavier springs up front. At the same time a friend had the 1st of the 4 door RR & he fitted a 4BD1. The difference was a lot heavier than the diesel V8. I can remember when we lowered it onto the engine mounts it almost went down to the bump stops. We both noticed that the RRs did not handle as well in the wet as before & the handling on the sand on Fraser Island was much worse. I think whichever way you go I would make sure to go with the lightest motor whether it be diesel or petrol to keep the balance of the car. I love my 4BD1T in my 6x6. I would be hesitant to put it in a Range Rover.
    Paul.
    My 4bd1t works fine in my RRC, drives the same as a 4x4 perentie, except a lot quieterrepowering a RRC, thinking about a 4JB1..

  8. #38
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    Bearman is offline TopicToaster Gold Subscriber
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    I find the extra weight on the front axle with the Isuzu is better than a light motor.
    Cheers......Brian
    1985 110 V8 County
    1998 110 Perentie GS Cargo 6X6 ARN 202516 (Brutus)

  9. #39
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    4BE1 engine

    Quote Originally Posted by Bearman View Post
    I find the extra weight on the front axle with the Isuzu is better than a light motor.
    Had an NKR250 duel cab with that engine for over 15 years with 400,000+ on the clock when I sold it. Best motor I have ever owned. It used 16lt/100 in the truck and was pulling 3300 rpm at 100k. I often thought about trying to put it into p38 that was using about the same petrol. With the better gearing and aerodynamics it would have been a lot more efficient.

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