max HP out of NA m42b18

[sjoerd]

The Dbilas setup is not tunable. Its not an alpha-n box either as it still requires the AFM.

Either way, the ECU add on is not a tunable setup.

wich ECU would i need so they can tune it? and do i have to make other mod's to tune the ecu?

[thebrelon]

you can chip tune the stock ECU for no additional cost (other than chips and tuner's time) or go stand alone, like megasquirt or others, but that's much more extensive (time, money, knowledges, selflearning, mods...)
the most "straight forward" is chip tuning, even if it is not as flaxible as stand alone, but whatever you choose tuning is not the easiest with a throttle body kit.

[sjoerd]

you can chip tune the stock ECU for no additional cost (other than chips and tuner's time) or go stand alone, like megasquirt or others, but that's much more extensive (time, money, knowledges, selflearning, mods...)
the most "straight forward" is chip tuning, even if it is not as flaxible as stand alone, but whatever you choose tuning is not the easiest with a throttle body kit.

and will it be bether to let it chip tune at e shop or bu a chip from dbilas?
as long as the engine runs smooth and rev's easely (and makes some more power ) it's fine for me, i am not planning to race it.

[thebrelon]

it would be better to get it chip tuned from a shop equipped with a dyno.

the thing (which is hard to understand for me) is that you talk about 3-4000$ in mods and only require that your engine runs "good enough".

for the same amount of money you can have a nice supercharger/turbo setup and make much more power or you can have a good rebuild with performance upgrades that would bring more power either.

if you look for a smooth runing/rev easy engine for a little investment without going too deep into the engine: keep your engine stock, use M52B28 pistons and make them work for a 11.5:1 Cr, 270 to 280 max intake cam, lightweight single mass flywheel, elec fan, underdrive pulleys, COP, get the whole chip tuned and you should have exacty what you're looking for for half the money.

[wazzu70]

It seems to me using the Dbilas software is the best route as its intended for use with the ITBs. People have tried various methods of tweaking the factory ECU to work with the ITBs with little success.

Main reason for lack of success is the factory ECU has its main load axis defined by the AFM. If you want an Alpha-N setup you use throttle position as the main load input. The factory ECU is not setup to work this way and this is why people have issues.

If you want true open air ITBs, then you need a standalone ECU as it can do either Alpha-N or speed density based tuning.


Easiest route is just to use the software made for the product from Dbilas and eliminate the guess work!

[Warsteiner]

I agree with Nick... If you don't plan on changing anything other than cams and springs in the engine, you should definitely talk to Dbilas about a chip for your combo.

As far as not being able to tune the ITB's though....If you can do it on S38's and S14's on stock ECU's I think Mark D and Barrie could definitely figure it out for the M42/44.

I have to finish my tuning!!

Cheers,
~Ralph

[alex230ro]

-dbilas throttle body kit,
-dbilas chip,
-stronger valve springs
-and dbilas  264� cams (or do i better thake other cams??)

should be enough,for cams you can look also at http://www.catcams.com/welcome.aspx

anyway you realise that this mods would cost very much

what power will i be looking at? and doesn't it raise the torqeu band cause it is my sunday/meeting car so i don't just whgant some power at 5500rpm's
in part's it will cost about 3000euro's

and you will gain perhaps 30hp if you are lucky 
there is a guy that sells  turbo kits for M42  it costs around 2800 usd(that is 2200 eur or something like that) shipping included.still you will need .
I've also thinking what to do with the M42 and every time the amount that is needed to make a solid M42 goes  towards 2000 eur.
You can try to begin with simple mods - chip and a lightweight flywheel and see how it goes.
Otherwise if you have the money and you are ok with the fact that you spend 3000 eur and gain 30hp go for it

[sjoerd]

aren't turbo's bad for aan NA engine if you don't change the pistons and crank ect.. i heard i would make to much pressure?
and otherwise i live in belgium and my goverment hates cars and we can't to to much to ore cars or we aren't allowed to drive it... we are not allowed to get other suspension, other seats, other brakes, other wheels, other steering wheel, and defenetly no turbo's ore supercharges or i will be put in jail :p

[alex230ro]

that's bad .if you have the money you can try the dbilas setup:
-cams
-chip
-itb
perhaps you can get a good deal for the whole pakage.

[thebrelon]

aren't turbo's bad for aan NA engine if you don't change the pistons and crank ect.. i heard i would make to much pressure?
and otherwise i live in belgium and my goverment hates cars and we can't to to much to ore cars or we aren't allowed to drive it... we are not allowed to get other suspension, other seats, other brakes, other wheels, other steering wheel, and defenetly no turbo's ore supercharges or i will be put in jail :p

we do have the same kind of laws in france but it's easier for us to cheat than it's for you... anyway, look at the recipe I gave few posts above and  forget about that dbilas thing: this is totally invisible from outside and would still grant you a nice power upgrade. add to that an E85 conversion (pump and injectors basically) if it's easily available in your area and you should walk on 325i...

[MrPhatBob]

I got this message from the German engine builder, Sefan Glass, who's been giving me a lot of help on mine:
"news from my costumer with the M42....monday he was here at Dyno,its a 1930 ccm with 320si valves, catcams  cams with 12,5mm I/12mm E valve lift, 13:1 compression, 45mm butterflies, straight port 50cm long, injected in trumpet give very good 244 hp and 240 nm at my dyno... rev band 5200-7900 very strong".

So thats a possible 244hp with 177ftlb.  But with a huge spec and aftermarket ECU.

[Warsteiner]

Could you ask him what kind of dyno he has and if those numbers were at the rear wheels?

Cheers,
~Ralph

[alex230ro]

no,in Europe usually they measure crank hp

[MrPhatBob]

It's a Hoffmann rolling road, with the crank hp calculated with run-down measurements of the transmission losses.