Tuning questions for M43 (Not kidding :P)

Tyres, exhausts, suspension, strut braces, air filters, brake pads/rotors and anything else for 'dawn raiders'.

Moderator: Gazza

Post Reply
User avatar
Inferno
Joined: Sun 30 Sep, 2012 08:35
Posts: 269

  Z3 roadster 1.8
Location: Athens
Contact:

Tuning questions for M43 (Not kidding :P)

Post by Inferno » Wed 15 Apr, 2015 12:02

Does anybody knows WITHOUT PRECISION ofcourse, how much HP can M43 gain with the installation of air filter, exhaust, camshaft, and ecu tuning?
Image
Image

User avatar
Inferno
Joined: Sun 30 Sep, 2012 08:35
Posts: 269

  Z3 roadster 1.8
Location: Athens
Contact:

Re: Tuning questions for M43 (Not kidding :P)

Post by Inferno » Tue 21 Apr, 2015 13:49

I am currently have installed an air filter, and a magnaflow back box, do you think that installing schrick cam, ECU programm, and stainless steel exhaust headers worths the costs?
Image
Image

User avatar
Southernboy
Joined: Thu 07 Oct, 2010 13:39
Posts: 6312

  Z3 roadster 3.0i
Location: Johannesburg

Re: Tuning questions for M43 (Not kidding :P)

Post by Southernboy » Tue 21 Apr, 2015 14:42

...... yep.... the cams are good for power, but you don't need a new ECU - just have your OEM ECU re-callibrated to accommodate the changes of the new cams. The SS headers won't change much unless it's a special branch header which allows less back pressure.......:wink:
"Normal is overrated"
Image

Z3 Upgrades and Additions

User avatar
Inferno
Joined: Sun 30 Sep, 2012 08:35
Posts: 269

  Z3 roadster 1.8
Location: Athens
Contact:

Re: Tuning questions for M43 (Not kidding :P)

Post by Inferno » Tue 21 Apr, 2015 15:41

how much hp do you believe it can reach with all that? (i don't expect much) for example i know that with a filter, exhaust and ecu reprogramming you can get around 10hp, but i have no idea about the camshaft...
Image
Image

User avatar
Southernboy
Joined: Thu 07 Oct, 2010 13:39
Posts: 6312

  Z3 roadster 3.0i
Location: Johannesburg

Re: Tuning questions for M43 (Not kidding :P)

Post by Southernboy » Tue 21 Apr, 2015 16:03

10 - 15 HP..... The main benefit is added power in the mid to high rpm, and added torque in that range. You must also consider stronger valve springs to go with the cams. They need to shut a little quicker and stay shut with the higher lift cams.
"Normal is overrated"
Image

Z3 Upgrades and Additions

User avatar
Inferno
Joined: Sun 30 Sep, 2012 08:35
Posts: 269

  Z3 roadster 1.8
Location: Athens
Contact:

Re: Tuning questions for M43 (Not kidding :P)

Post by Inferno » Wed 22 Apr, 2015 08:11

10-15Hp from all that, or from just the cam?
Image
Image

Del
Joined: Sat 19 Nov, 2011 18:35
Posts: 2122

  Z3 roadster 1.9

Re: Tuning questions for M43 (Not kidding :P)

Post by Del » Wed 22 Apr, 2015 08:52

My understanding is that "higher lift" camshafts will give slightly more BHP at the expense of torque at lower revs. So in a racetrack situation when high revs are being used, there would be a small BHP gain but for normal road use the benefit would be questionable. You may also cause a lumpier idle, higher fuel consumption and need to make other alterations to cope i.e a remap. My own opinion is that when you are using a normally aspirated car on the road, you are quite limited with the "tuning" alterations you can make other than ensuring that the car is in tip-top standard service and tune condition.

Personally (must admit I am a bit boring :)) as you have the single cam 1.9 M43, I would focus on things like new top quality spark plugs, possible renewal of the HT leads (1.9 feature only), getting the injectors cleaned and new air filter.

https://www.youtube.com/watch?v=WQN-0zvZNbY

User avatar
Inferno
Joined: Sun 30 Sep, 2012 08:35
Posts: 269

  Z3 roadster 1.8
Location: Athens
Contact:

Re: Tuning questions for M43 (Not kidding :P)

Post by Inferno » Wed 22 Apr, 2015 10:52

i've got the 1.8 SOHC engine not the 1.9, (they are almost the same anyway i think), 1.000€ for that little gain is not worth it i think, for the same kind of money i can put the M44 1.9is, i have top quality spurk plugs and new free air filter, i will look on the HT leads renewal you mention
Image
Image

Dikiy
Joined: Fri 29 Jan, 2016 10:34
Posts: 1

  Z3 roadster 1.9

Re: Tuning questions for M43 (Not kidding :P)

Post by Dikiy » Thu 19 May, 2016 12:24

Funny question, but I`ve faced it)))
My Z3 `99 with M43 POWER)))
Ex. manifold was taken from M42(somebody says that it has similar length for each cylinder :) ) and connected with spec. plate of M43 head.
Image

sebring
Joined: Thu 12 Dec, 2013 12:45
Posts: 39

  Z3 roadster 1.9

Re: Tuning questions for M43 (Not kidding :P)

Post by sebring » Wed 12 Apr, 2017 13:38

isn't it cheaper to put a 2.8 into it?

193bhp out of the box - put a m50 manifold on it and you got around 220-230bhp

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests