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  1. #21
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    Quote Originally Posted by Wobbly Dave View Post
    I post this without positive confirmation that my 4th gearbox since transplanting in the quaiffe LSD, is possibly on its way out. I have an appointment to see a gearbox specialist (the same people who did the fit back in 2011) later this week.

    This brings me to the thought that it is impossible to modify these boxes without later problems. Whilst I accept pushing them harder will limit life I am feeling a little frustrated.

    Should I be looking to change to an M66 - is this any stronger? Should I go brand new & cover that?

    The ford focus ST and RS appear to have better boxes?

    So Hamish says the only real way to get 400+ HP is to go down the RS Focus route. I don't agree - it must be possible as our Swedish cousins seem to have it nailed.

    Going to speak to Russell at RT Mechanics to see what they did to overcome their own challenges on the yellow peril.

    Speaking to the gearbox specialist he is also of the opinion that modifying/ ramping up the power on these road boxes is putting them beyond their engineered limits.

    Perhaps leaving the open diff as is - is the only way?
    this one sentence shows how little your so called tuner actually knows, its not bhp that kills gearboxes or clutches its torque.
    400bhp isnt a problem for the box ASK TIM
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  3. #22
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    Quote Originally Posted by deathrider311271 View Post
    this one sentence shows how little your so called tuner actually knows, its not bhp that kills gearboxes or clutches its torque.
    400bhp isnt a problem for the box ASK TIM
    daves car has no torque lol

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  5. #23
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    I think daves just been unlucky with gearboxes as he runs very little torque compared to some, yes my m59 ate itself but the 2.0L box is coping with 410 lb/ft quite happily at the moment (famous last words lol)


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  6. #24
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    Frankie beat me to it lol


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    That is a laughable statement, you have to agree with DR on that one!

    Not many people opt for breaking through the 400bhp barrier, simply because the cost in jumping from 350 to 400+bhp is pretty huge if it's done properly and reliably. And in all fairness in the real world, is 400bhp in a fwd Volvo much faster than a 350bhp fwd Volvo?? Apart from a motorway blast, not really, if anything it's probably less driveable. Anything is achievable with the right amount of money and knowledge. Unfortunately I believe Darth Cabl... (hang on, I'll get told off for that), Mr L doesn't have enough of the latter to achieve what you want to end up with Dave, hence that pathetic 'get out' comment!

    Many people running decent power (including the likes of Steve and Tim with well over 400bhp) have run M56's with an LSD, and afaik never had a problem. One thing to mention is, Quaife LSD's are not all equal. There is a quite a big variation in how effective they are, being a mechanical type diff that is built, fit and forget they are not all 'exactly' the same. The Quaife diff I had in my S70 was leagues ahead of the same diff Steve had in his V70 for example. I will be opting for an M56 and a Gripper in my 850.
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  9. #26
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    Quote Originally Posted by deathrider311271 View Post
    this one sentence shows how little your so called tuner actually knows, its not bhp that kills gearboxes or clutches its torque.
    400bhp isnt a problem for the box ASK TIM
    That remark has been taken completely out of context! It was a figure of my own speech & not a direct quote - so I don't see how this point is in anyway constructive or even accurate. Given that power is a mathematical consequence of torque there is a direct correlation, to be honest I'd rather not get into tit-4-tat exchange over my tuner's better than yours

    I think he was more intonating towards the RS gearbox being more capable given that it was designed to take more punishment from the outset & as a whole they are just newer.

    Still don't want one.
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  10. #27
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    It might surprise people to know that I don't agree with everything Mr. L says. I raised this thread to gauge opinion on which possible route to reliability I may take. The current box has had its fair share of abuse - so who can say.
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  11. #28
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    Have a look up at the Hotwok Nissan Cherry (now putting together a purpose built space framed Juke with the same set up)
    Afaik he ran/runs a modified Volvo box' and I think, at the minute at least holds the current Euro fwd drag record
    Not sure on torque but nigh on a 1000hp. He has broke boxes, but at what ever spec he's running with less than half the power it should last forever

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  13. #29
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    Quote Originally Posted by Wobbly Dave View Post
    That remark has been taken completely out of context! It was a figure of my own speech & not a direct quote - so I don't see how this point is in anyway constructive or even accurate. Given that power is a mathematical consequence of torque there is a direct correlation, to be honest I'd rather not get into tit-4-tat exchange over my tuner's better than yours

    I think he was more intonating towards the RS gearbox being more capable given that it was designed to take more punishment from the outset & as a whole they are just newer.

    Still don't want one.
    If it is mathematical as you say why has the torque on my S70 been limited by the map??? and before you ask yes it is a custom map, no i wasnt getting into a tit for tat about tuners, everyone has their own mind when it comes to tuners, for me AET motorsport for my ME7 car, Tim and Ben for my motronic 4.4.

    Im not slating Hamish in any way but we all know he isnt really interested in doing custom maps, all he wants to do is reflash work and normal mechanics. For that reason alone i would be looking at other options.
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  14. #30
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    of course it's mathematical. Brake Horse Power is the mathematical product of torque (in ft lbs) times the RPM divided by 5252.

    if I have misread what you're saying then accept my apologies - it is too easy to mis-interpret the written word on forums.

    TBH I wasn't looking for lots of torque low down either & to date my maps have not been torque mad - so I am pleased that you have a responsible mapper who's tried to look after your car.

    I am hoping that we'll be able to use the SBC to raise the boost further up the rev range to help maintain the torque curve right through. I have no planned power figure.
    Last edited by Wobbly Dave; Tuesday 8th April 2014 at 20:04.
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    Quote Originally Posted by Wobbly Dave View Post
    of course it's mathematical. Brake Horse Power is the mathematical product of torque (in ft lbs) times the RPM divided by 5252.

    if I have misread what you're saying then accept my apologies - it is too easy to mis-interpret the written word on forums.

    TBH I wasn't looking for lots of torque low down either & to date my maps have not been torque mad - so I am pleased that you have a responsible mapper who's tried to look after your car.

    I am hoping that we'll be able to use the SBC to raise the boost further up the rev range to help maintain the torque curve right through. I have no planned power figure.
    Stick a n/a box in it then you will have more power in the road than being left in the gearbox .and it will change the power curve a lot too .with your quaffe in a n/a box and with your 7.5krpm rev limit you will still hit 160mph too .but my god will it be quick and they are cheap as chips too and not worn like the t5 boxes too.and what you are using the car for track and drag the ratios would be wild .

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  18. #32
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    Don't know wot box I have but it works well with its gripper tho on and off the track or 1/4 mile


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  19. #33
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    Quote Originally Posted by smithy View Post
    Stick a n/a box in it then you will have more power in the road than being left in the gearbox .and it will change the power curve a lot too .with your quaiffe in a n/a box and with your 7.5krpm rev limit you will still hit 160mph too .but my god will it be quick and they are cheap as chips too and not worn like the t5 boxes too.and what you are using the car for track and drag the ratios would be wild .
    Interesting idea.
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  20. #34
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    I also have the torque limited on mine, to protect the box, but I have an m59.
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    Quote Originally Posted by WOODY T5 View Post
    Don't know wot box I have but it works well with its gripper tho on and off the track or 1/4 mile

    if or when if i uprate my box it will be with a gripper diff.
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  23. #36
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    See my build thread - but I think I have fixed it/ found the problem. Wobbly can't do up his nuts properly LOL
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    Quote Originally Posted by cherry1809 View Post
    Have a look up at the Hotwok Nissan Cherry (now putting together a purpose built space framed Juke with the same set up)
    Afaik he ran/runs a modified Volvo box' and I think, at the minute at least holds the current Euro fwd drag record
    Not sure on torque but nigh on a 1000hp. He has broke boxes, but at what ever spec he's running with less than half the power it should last forever
    PS I did look it up - http://www.woken.se/wok/2005/3_gearbox_e.htm - back in 2005 they used a M56H modified with a multiplate clutch and a quaife LSD.
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    Quote Originally Posted by Wobbly Dave View Post
    See my build thread - but I think I have fixed it/ found the problem. Wobbly can't do up his nuts properly LOL

    You dope
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    Spoke too soon - noise is back & this time the exhaust dp remained clear
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