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  1. #1
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    M66D in a 850 and a top speed of 220 mph

    After spending a slightly damp but very enjoyable Saturday morning at HLM dyno day myself and Steve went to Solihull and collected a M66D gearbox.




    As you can see from pedro`s image with the M66D ratios it could give me a top speed of 220+ mph.

    Name:  m66d ratios.png
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    (well you could if pedro hadn`t removed the image)

    When in 6th gear at the moment 80pmh = 3000rpm but with the M66D 80mph will be a little over 2000rpm.

    I`m aware at that rpm I`m not in the "power band" but if I need to knock it down to 4th to get in the "power band" then thats no hardship.

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, ostrich 2.0 , green injectors, K24 turbo, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

  2. #2
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    What the West Bromwich ghetto lol, nice chap, though I wouldn't want to park overnight.

    Interesting how the postcode almost spells BOOST!

    B700ST!

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  4. #3
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    As someone who's mapped launch control into his car but refuses to actually launch it, why are you looking at 220mph gear ratios too?
    19t, greens, 3" inlet, 3" downpipe with race cat, V70R catback, autotech map...

    310.2bhp / 333ft/lb

    2016 Swedish Day UK "Best Modified Swede"

  5. #4
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    Quote Originally Posted by M-R-P View Post
    As someone who's mapped launch control into his car but refuses to actually launch it, why are you looking at 220mph gear ratios too?
    I`m not looking to do 220mph, I`m looking at more curising speed against rpm.

    I`ve got to do somthing to get my average mpg from 19

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, ostrich 2.0 , green injectors, K24 turbo, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

  6. #5
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    Quote Originally Posted by oblark View Post
    I`m not looking to do 220mph, I`m looking at more curising speed against rpm.

    I`ve got to do somthing to get my average mpg from 19
    Try some weight reduction...

    ...in your right foot lol
    19t, greens, 3" inlet, 3" downpipe with race cat, V70R catback, autotech map...

    310.2bhp / 333ft/lb

    2016 Swedish Day UK "Best Modified Swede"

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  8. #6
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    Quote Originally Posted by M-R-P View Post
    Try some weight reduction...

    ...in your right foot lol
    That`s with the curise control set to 70 mph.

    If have a spirited drive it drops to 7

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, ostrich 2.0 , green injectors, K24 turbo, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

  9. #7
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    5 pot heart of a Volvo
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    Quote Originally Posted by oblark View Post
    That`s with the curise control set to 70 mph.

    If have a spirited drive it drops to 7
    something wrong with your car then, i averaged 36mpg yesterday on the way to hlm

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  11. #8
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    Jeeezus! even the wife manages 38mpg at 70
    19t, greens, 3" inlet, 3" downpipe with race cat, V70R catback, autotech map...

    310.2bhp / 333ft/lb

    2016 Swedish Day UK "Best Modified Swede"

  12. #9
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    Quote Originally Posted by M-R-P View Post
    Jeeezus! even the wife manages 38mpg at 70
    It`s the price you pay for brake horse power

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, ostrich 2.0 , green injectors, K24 turbo, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

  13. #10
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    Quote Originally Posted by oblark View Post
    It`s the price you pay for brake horse power
    We'll compare notes at southways soon mate
    19t, greens, 3" inlet, 3" downpipe with race cat, V70R catback, autotech map...

    310.2bhp / 333ft/lb

    2016 Swedish Day UK "Best Modified Swede"

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    oblark (Sunday 5th October 2014)

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    I got 35 at 70, even though 2 up, with tools and a gearbox in the boot, not too terrible.

    Martin your ££££ing cleaning my injectors, next southern!

  16. #12
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    220? Not with our aerodynamics
    missing being Swedish

    Previously:
    03 S40 Sport Lux 1.9d SOLD
    1998 MTE Stage 2 V70 T5 Manual SOLD
    1998 V70R AWD Manual BROKEN

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  18. #13
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    A Lotus Carlton has a similar gear ratio to that box and they can only maintain speed in 6th they can't accelerate regardless of whether they're in the power band or not...

    Fair play though it will certainly help with your mpg although I fear that is more to do with other issues not centred around gear ratios. My auto ticks along at 2,400 at 70 and that achieved 35 mpg on yesterday's run and that's tuned with greens.


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  19. #14
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    2000rpm at 80mph sounds good to me, for some reason going over 3000 rpm rockets the fuel consumption
    1996 Olive Green 850 AWD - Forged rods, VXR injectors, 19T, Ostrich 2.0, Arduino data display, Active exhaust control. Follow the project here
    1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.

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  21. #15
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    Quote Originally Posted by AndysR View Post
    A Lotus Carlton has a similar gear ratio to that box and they can only maintain speed in 6th they can't accelerate regardless of whether they're in the power band or not...

    Fair play though it will certainly help with your mpg although I fear that is more to do with other issues not centred around gear ratios. My auto ticks along at 2,400 at 70 and that achieved 35 mpg on yesterday's run and that's tuned with greens.
    You mean high up the mph I.e flat out, mine is slightly harder geared in 6th 238mph, but easily accelerates in 6th on the motorway. But obviously if making headway you'd drop it down a few gears.

  22. #16
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    a 19t just isn't laggy enough
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    Quote Originally Posted by Ettienne View Post
    mine is slightly harder geared in 6th 238mph
    the M66D has the highest top-end, so guessing you've done your own calculations with a bigger tyre?

    my gearbox has a higher top-end than the M66D in the 5 gears it has got

  23. #17
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    There's loads of these gearboxes on ebay
    1996 Olive Green 850 AWD - Forged rods, VXR injectors, 19T, Ostrich 2.0, Arduino data display, Active exhaust control. Follow the project here
    1996 Nautic Blue 850 AWD - Failed its MOT, now it's a donor for the green thing.

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  25. #18
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    Quote Originally Posted by M-R-P View Post
    Jeeezus! even the wife manages 38mpg at 70
    Quote Originally Posted by oblark View Post
    It`s the price you pay for brake horse power
    Not necessarily true!

    Have you ever thought as your a newbie to ECU management that is the price you pay for getting it wrong!

  26. #19
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    Quote Originally Posted by 960kg View Post
    Not necessarily true!

    Have you ever thought as your a newbie to ECU management that is the price you pay for getting it wrong!
    No, I`m running a file that has been tested, It`s just a case of fine tuning the injector tables to suit my setup.

    1996 850 T5 AWD - Self tuned M4.4 ECU with COP`s, ostrich 2.0 , green injectors, K24 turbo, 3.25" MAF, top mounted Dump Valve, RN Exhaust manifold, 3" downpipe with 200 cell cat, 2.75" Stainless exhaust, Brembo calipers, S60R brake discs, stainless RIP kit, 3" Throttle body,

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  28. #20
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    You lot all commenting on your magical MPG's please tell me you're not quoting your dashboard figures!


 

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