Jump to content

mr E34

Members
 View Profile  See their activity

  • Content Count

    877

  • Joined

  • Last visited

Posts posted by mr E34

  5. Posted · Edited by mr E34 · Report reply

    Gus/my old - Turbo 318iS

    230 rwhp as measured by Gavins dyno - 25% power train loss roughly so call it 258 flywheel hp.

    So 143hp/ltr <- god bless turbos

    212hp/ton

    Edit: it weighed 1220 kg

    Forced induction is bloody good when you see those figures.

    I still don't get pwr train loss, say you are developing 200hp @ wheels, you then turbo and you get 300hp @ wheels.

    200hp + 25% =250 flywheel

    300hp + 25% =375 flywheel

    375-250=125, yet my increase was only 100hp, the higher the hp the 25% should be scaled?? I don't know, am i missing something in the equation??Thanks. ALSO, some say 15% loss on manual cars?? Don't know.

  14. Posted · Report reply

    Don`t forget what we discussed Graham. ECU is included in the price. M30 3 litre ECU from an E34 works really well.

    Although there are other options we have discovered.

    Have a M52 2.8 crank avaliable as an option.

    Regards Ray

    0212HELLBM

    ps I have 6 M20 B25 motors in stock.

    2 around the 100k mark

    Ray's got the options covered! All you need is the answer!!!! Which option???????

  17. Posted · Report reply

    Thanks once again guys, I was quoted $1,200 for a piggy back installed with a Dyno sheet to back things up. To remap the factory ECU I was quoted $1,125 so not much in it. Either way im not going to spend near 30% of the cars value on a tune.

    I am staring to think that this is a expensive conversion for “only†200 odd BHP, to build the 2.7 I essentially need to buy another two engines + pay for labour and new refresh parts + supplements etc..It’s quickly adding up to nearly $5K. I could have a 2.5Vanos in for not much more than that!

    Maybe a M20-25 with a few little mods could be better option. What kind of power would a M20-25 put out with say a set of extractors, polished intake plenum and a cold air box? Say 180bhp

    Just drop in a std M20 2.5ltr like you said, pwr output is anyones guess on an older engine. Dyno is only approx at the wheels so only good to compare before/after figures.

    The big mistake many people seem to do is massive internal engine work and leave the std intake plenum, if you are going for HP you need individual throttle bodies. Thats what all M engines do.

    My 2 cents.

  18. Posted · Report reply

    I think the dyno will maybe give that 10hp. Hardly a huge difference.

    It will be significantly cheaper to tune motronic than use a piggy back.

    I too am not a fan of the 2.7 build - not enough power for all the work (unless you go fairly hardcore on it)

    Peak horspower/torque thru the mid range counts for a lot when it costs you nothing (ecu/tune) compared to internal engine mods.

    Yes, will be cheaper to tune motronic but you still have barn door flap.

    Thats the prob with 2.7 build, you are correct.

    Hey, what do i know!! I'm just fiddling around for a hobby.

  19. Posted · Report reply

    Hi Graham, stating the obvious but the 2.7 build will be expensive (ecu + tuning small part) and only modest increase.The Alpina 2.7ltr was only rated at 210ps @ 5800, 289nm @ 4500.

    Have a good read on the overseas sites where they talk about it, maybe pickup a good later 2.8ltr?, unless you want to stick to M20.

    I fitted piggyback Map-ecu 2, call me on 5231711 if you need info on piggyback.

    Rgds

    Boris.

    Forgot to tell you the big advantage with piggy back over just chip etc is the removal of the AFM, big difference!

  21. Posted · Report reply

    Thanks guys that would end up costing me the same as a piggy back though. I can get a M50 ECU installed for that money.

    Does anyone know if there is a chip or a factory BMW ECU that can run the 2.7??

    Hi Graham, stating the obvious but the 2.7 build will be expensive (ecu + tuning small part) and only modest increase.The Alpina 2.7ltr was only rated at 210ps @ 5800, 289nm @ 4500.

    Have a good read on the overseas sites where they talk about it, maybe pickup a good later 2.8ltr?, unless you want to stick to M20.

    I fitted piggyback Map-ecu 2, call me on 5231711 if you need info on piggyback.

    Rgds

    Boris.

  22. Posted · Report reply

    Yeah I know about the Sultan's B12, nice car :) The tyre size thing I was talking about was actually referring to the 285/35/18's possibly being too wide for 18x9.5" wheels, but obviously they are ok as Alex is running them. There are a few E31's out there with 10.5" or wider rear wheels with 305's or wider on them, it would appear there is a ton of room under the arches.

    I like the design of the spokes on the Alpina's, but not the big centre cap. I quite like their design of wheel that has got 5 groups of 4 parallel spokes, those are quite nice.

    Ideally it'd be either M-Par's or M6 wheels, just need to find some :)

    Any idea when your 850csi will be ready for shows etc?

    Maybe you could buy the ex sultans car as well???

  24. Posted · Report reply

    Ahh yep, I wasn't sure about running 285's on the back, I was thinking 275's might be the max.

    Send me an email so I've got your address so I can send you pics when the bumper has been done

    Hi brad, not sure if you checked out Alpina B12 5.7 (416PS / 570nm)but it ran as follows:

    FRONT: 18x9 alloys, 245/40/18 tyres

    REAR: 18x10.5 alloys, 285/35/18 tyres

    Would assume your beast would take the same,(buy some classic Alpina alloys)

×
×
  • Create New...