Lexus V8 or 4.5 EFI in 80 Series LC 4.2D - Page 2





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  1. #21
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    That 1FZE is the man. Uri uses them in the dessert with at least 1tonne payload at 6,000rpm, all day and every day. Then they put 400,000km on them.

    Just totally unbelievable.

    Yes they like the petrol, but then you never open the motor.
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  2. #22
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    Quote Originally Posted by Henris View Post
    That 1FZE is the man. Uri uses them in the dessert with at least 1tonne payload at 6,000rpm, all day and every day. Then they put 400,000km on them.

    Just totally unbelievable.

    Yes they like the petrol, but then you never open the motor.
    Henri I agree 100% after a Namib trip with Uri last year my respect for the 4.5efi grew a million times. In the conditions they work day in day out -year in year out the 4x4 to beat them has yet to be built.
    It is not what you buy its what you build.

  3. #23
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    I suggest Lexus motor, lot more power and torque and much lighter on fuel. If you want to get it done for you, I suggest Mark Watson from Springs. I've seen many of his jobs, spoken to many of his clients and everyone are happy. He does a real professional job - he is on the L/Cruiser forum. One of his most recent projects was a 5l v12 Toyota Crown motor into a 79 L/Cruiser bakkie. His prices are very reasonable compared to other people. He is currently fitting a vvti into my Disco 1.
    If you want more info contact me on 0844888058.
    Duimspyker
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  4. #24
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    Yes I can vouch for Mark. A total professional.
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  5. #25
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    Quote Originally Posted by Henris View Post
    That 1FZE is the man. Uri uses them in the dessert with at least 1tonne payload at 6,000rpm, all day and every day. Then they put 400,000km on them.

    Just totally unbelievable.

    Yes they like the petrol, but then you never open the motor.
    I have the 1fze in my 80 , but make sure that the person that does conversion is familiar with the job .
    I am very happy with the efi motor . Carb was just not strong enough

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  6. #26
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    The 4,5 is an excellent and reliable motor and has done duty for many years in various Toyota products - only recently replaced by the v6. The only issues are their fuel consumption and the costs if something happens to the motor. To overall one will probably cost 30k where you can get a lexus for around 10k complete with gearbox, ecu's, harnesses etc. They are also reliable and is more fuel efficient. The vvti has about 51kW and roughly 50Nm more than the 4,5 and is also considerably lighter due to alu alloy block & heads.
    Duimspyker
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  7. #27
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    Duimspyker ,
    I agree with you when it comes to cost and consumption. Take it from a man that has done a few conversions himself. The 4.5 is not a conversion it is bolt in. You can use standard Cruiser spares. The only Hazel can be the tronics. With the Lexus you have to relocate engine mountings , use make shift bell-housing and clutch assy to mount it to the Cruiser box. If you use the Lexus auto box you need adapters to the Cruiser t-case,modify prop shafts and ad tronics to control the box. Yes a 4.5 with gearbox will cost you around R60 000.00. The cost of the Lexus usually ran around R80 000.00. The complete 4.5 will be more ore less the same in the end.
    If you do not change the existing vehicle's gearbox the 4.5 will cost you less . With the 4.5 you will then have a almost standard Cruiser and not a conversion as with the Lexus. With a few head and cam mods the 4.5 will equal the Lexus power and torque.
    Last edited by grips; 2012/08/18 at 06:46 AM.
    It is not what you buy its what you build.

  8. #28
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    It all depends if Krebs's mate wants to keep his vehicle as close to std as possible - if that is the case, then the 4,5 is the better option because of a lot less mods and less time consuming. If he doesn't mind fitting another engine (I understand this is the case) then the lexus is the better option because (1) also an excellent reliable engine (2) more power/torque (3) much better torque curve (flatter and at lower rpm) - which is good for off-roading (4) much more fuel efficient (5) a lot cheaper to buy/maintain (6) higher revving motor - happy to run at 6000, even 6500 - good for sand/dunes (7) weight wise a lot lighter due to allu alloy block/heads. Mark Watson from Springs - truly professional - will quote him a lot less than 60k, that includes the complete engine/auto gearbox assy. He will also make up a complete exhaust. Mark is on the L/Cruiser forum for further info/reference. He is well known and recognised for his professionalism but is very busy. I don't think the 4,5 will come close to match the power/torque/torque curve of the lexus motor with whatever mods because it is impossible to gain 51 kW (4,5 is 165, vvti is 216, std. is about 195 on the f/wheel) from any engine - excl turbo/s/charger etc. The 4.5 is designed to deliver 165 kW on the f/wheel - with a few mods (blueprint engine ; gas flow head ; f/flow exh. ; other cam etc) you will gain more power but not 51kW. If you mod the camshaft you're going to change the torque curve for the worse - it will move up the rev range, and that is not good for off roading. Inherently the lexus motor has a lot more torque at the bottom end of the rev range (1000 - 1500 rpm) than the 4.5 which makes it more ideal for off roading and cruising. Then off course the sound, eish !!
    Duimspyker
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  9. #29
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    Duimspyker ,
    I read Mark`s work on the Cruiser forum, enjoyed his V12 conversion. Also think he is a professional. As said I have done numerous conversions myself. My main reason for my post is to help someone not to fall into the pit falls of a conversion. The simpler the better. And for engines I am quite familiar with modifying them. I am currently busy building a 300kw 347 Ford stroker. The choice of a cam can make a engine more powerfully of more torquer depending on the application you want.
    It is not what you buy its what you build.

  10. #30
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    To keep as simple as possible, the 4.5 is the better option. Different c/shafts will add more power and torque (when using the same motor) - the only problem is that the extra power & torque will come in higher up in the rev range and the torque curve will basically look like an tri-angle meaning you will have max torque between a shorter rev range. For off roading and even cruising you want a torque curve that looks like table mountain and at a rev range as low as possible - and this is why I say the lexus (vvt/i) is the better option.
    Duimspyker
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  11. #31
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    Duimspyker

    Do you have a graph showing the torque curve of the VVTi? The 4.5 motor is really strong on torque low down in the rev range.

  12. #32
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    Thumbs up

    A very interesting tread guy's

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  13. #33
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    Quote Originally Posted by David Helfrich View Post
    A very interesting tread guy's
    +1
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  14. #34
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    bryan , i did sort your cruiser out and ettienes so why are you shooting it down , look on the cruiser club and yes we have been successfull , so sorry that you took yours to knuckleheads from the beginning but i cant help it , you got ripped from the beginning .
    Last edited by MARK W; 2012/08/25 at 08:31 AM.

  15. #35
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    been reading this and at the end of the day the customer must decide what he wants , yes the 4500 efi is a good motor make no mistake but very thirsty , the 1uz can also be thirsty but it depends on your right foot , bryans cruiser when sorted out drove quite well but the guy that took it over from bryan could not afford to use it as a daily runner , ( the comment of 4 so called specialists bryan , i hope that does not include me - we got yours running , but the previous guys had butchered it already )
    the ideal gearbox for the 80 is the diesel version , the diff ratio as well as it gives a more relaxed cruising rpm .
    we fitted a 4500efi motor to a 62 series with excellent results with the original ecu. but as said yes the motors are not cheap , as for fitting a lexus into the 80 it goes in with no problems , space is not a problem , but just dont put a 2 ton flywheel on , as for the electronics the spits works like a bomb no problems .

  16. #36
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    Default Re: Lexus V8 or 4.5 EFI in 80 Series LC 4.2D

    Quote Originally Posted by Krebs View Post
    @ Sandboarder.. Ja, reliability is 'n issue, want hy wil gaan overland. Ek het al Lexus V8's gesien vir R 6 500, en 'n EFI vir R 25 000... Groot verskil! Watter het beter output (kW/Nm) ? En wat is die 1UZ-FE, 1HZ en 1FZ in leke terme..

    dankie
    Years later from my original reply and now I can finally provide some real life input on the 1FZ vs 3UZ (updated 1UZ).

    I've test driven the 1UZ but personally prefer the 3UZ due to better low end torque. In comparison I would say the 3UZ and 1FZ is close to the same in low down torque due to the variable intake runner lengths and VVTi on the 3UZ.
    Top end the 3UZ takes the win quite far in terms of power and rev range. The engine loves to breathe and rev BUT there is a noticable change in torque from 3000rpm where the intake flaps open up which might make the engine feel like it's got a "lack" of low end but this is more to do with the sudden transition compared to the smooth torque curve on the 1FZ.
    The 3UZ is more fuel efficient but there are also more sensors and electronics to look after. As previously mentioned here, the 3UZ is a very reliable engine option IF the conversion has been done properly like any other.

    Be very careful about who does the engine conversion or maintenance as I've already paid my school fees when a well known "professional" workshop in Cape Town assured me they know these engines work when they replaced the timing belt, well turns our they did not.

    So far I don't have any major complaints on the 3UZ and would recommend it if the budget does not allow for a 6.0L Chevy
    Prepare yourself for a budget of R70k+(2020 pricing) minimum for a professional 3UZ engine swap from guys like Mark Watson, which I can personally vouch for. DO NOT fall for a cheaper engine conversion price as they usually all end up at Mark's garage for him to sort out like it should've been done in the first place.
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  18. #37
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    Default Re: Lexus V8 or 4.5 EFI in 80 Series LC 4.2D

    Wow Mark W, still around? Had some work done and would not let him touch another vehicle

  19. #38
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    Default Re: Lexus V8 or 4.5 EFI in 80 Series LC 4.2D

    Quote Originally Posted by Wicd View Post
    Wow Mark W, still around? Had some work done and would not let him touch another vehicle
    he is still around.


    So you had a bad experience?
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  20. #39
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    Default Re: Lexus V8 or 4.5 EFI in 80 Series LC 4.2D

    Quote Originally Posted by Racer-X View Post
    he is still around.


    So you had a bad experience?

    Yip, terrible. Flat out being lied to and crappy work. After months drove the vehicle away and motor failed within 100km.

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    Default Re: Lexus V8 or 4.5 EFI in 80 Series LC 4.2D

    I am with Petri on modifications to these cruisers. Yes it can be done and has been done but its not cheap, with many failures also. If you are not mechanical mined stay away and buy the original, and one that was well looked after with a proper service history. Yes you don pay a lot for them but it don't stop there. You must decide do you want to work on or with it.
    Johan Kriel

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