2.0 tuning

[R.E92]

I suppose the condensed answer would be to keep the 18i and get a proper remap done. If you want more power than the tuned 18i offers then a tuned 35i will take you as high as the E89 platform can offer.

If MHD ever moves into N20 territory then the 18i will be a serious performance bargain.

 

[GBZ4]

The OP wants more oomph!
After reading thro some very well thought out arguments to wring more out of a 2.0l 4cyl and the potential problems, I would say save your cash for a 3.0l six in the future.

A featherweight will never go the distance with a heavyweight - or is that an over simplistic analogy !

Maybe just be content with what you've got? There will be plenty out there that would be more than happy to own a car like yours

Just my rambling thoughts and not wishing to offend!

Having given a remap consideration just recently I have to agree with Ronk. It may take a little longer to get there but I have still managed a 'sqeaky bum' moment and decided at my age it's enough as it is - just enjoy :roundel:

 

[Smartbear]

The OP wants more oomph!
After reading thro some very well thought out arguments to wring more out of a 2.0l 4cyl and the potential problems, I would say save your cash for a 3.0l six in the future.

A featherweight will never go the distance with a heavyweight - or is that an over simplistic analogy !

Maybe just be content with what you've got? There will be plenty out there that would be more than happy to own a car like yours

Just my rambling thoughts and not wishing to offend!

I've not heard of a remap from a reputable tuner causing problems with the n20 engined car's Ron?
It's a lot cheaper to get a map than to change cars :wink:
Rob

 

[ronk]

The OP wants more oomph!
After reading thro some very well thought out arguments to wring more out of a 2.0l 4cyl and the potential problems, I would say save your cash for a 3.0l six in the future.

A featherweight will never go the distance with a heavyweight - or is that an over simplistic analogy !

Maybe just be content with what you've got? There will be plenty out there that would be more than happy to own a car like yours

Just my rambling thoughts and not wishing to offend!

I've not heard of a remap from a reputable tuner causing problems with the n20 engined car's Ron?
It's a lot cheaper to get a map than to change cars :wink:
Rob

Im sure that a good tuner will be able to wring more out of the 2.0l engine but more power needs more fuel - I believe that a small engine that is tuned to produce similar power levels of a larger engine uses significantly more fuel as it's at the top end of its working efficiency. Thus any advantages of the smaller engine are gone.

I'm not being unsympathetic to the smaller engine - as young fella I had a very highly but conventially tuned (full race) cooper S

 

[Smartbear]

The OP wants more oomph!
After reading thro some very well thought out arguments to wring more out of a 2.0l 4cyl and the potential problems, I would say save your cash for a 3.0l six in the future.

A featherweight will never go the distance with a heavyweight - or is that an over simplistic analogy !

Maybe just be content with what you've got? There will be plenty out there that would be more than happy to own a car like yours

Just my rambling thoughts and not wishing to offend!

I've not heard of a remap from a reputable tuner causing problems with the n20 engined car's Ron?
It's a lot cheaper to get a map than to change cars :wink:
Rob

Im sure that a good tuner will be able to wring more out of the 2.0l engine but more power needs more fuel - I believe that a small engine that is tuned to produce similar power levels of a larger engine uses significantly more fuel as it's at the top end of its working efficiency. Thus any advantages of the smaller engine are gone.

I'm not being unsympathetic to the smaller engine - as young fella I had a very highly but conventially tuned (full race) cooper S

That's not so Ron, bmw say the 28i (which is the highest tuned 2litre) consumes 20% less fuel than the 3litre engine it replaced. It also produces more torque at lower rpm's than the larger engine
The n20 has a forged bottom end, it's strong enough to avoid grenading!
Rob

 

[ronk]

Grenading !!!!
I like that phrase. I did see an over revved BMC 'A' series engine fracture a crank and burst thro' the block many years ago.

 

[Smartbear]

Grenading !!!!
I like that phrase. I did see an over revved BMC 'A' series engine fracture a crank and burst thro' the block many years ago.

He should have read the excellent David Vizard book on A series tuning before he got that far!
Rob

 

[willgill]

I do have to quickly squash the more torque claim. Stock, the 28i has a tiny amount more torque for about 500 rpm, then it falls off dramatically.

28i torque curve : http://www.automobile-catalog.com/curve/2013/1861340/bmw_z4_sdrive28i_automatic.html
35is torque curve : http://www.automobile-catalog.com/curve/2010/1199255/bmw_z4_sdrive35is.html

I hardly think it makes it a low-end torque monster :wink:

 

[ronk]

Grenading !!!!
I like that phrase. I did see an over revved BMC 'A' series engine fracture a crank and burst thro' the block many years ago.

He should have read the excellent David Vizard book on A series tuning before he got that far!
Rob

He from Cars & Car Conversions!

 

[Smartbear]

I do have to quickly squash the more torque claim. Stock, the 28i has a tiny amount more torque for about 500 rpm, then it falls off dramatically.

28i torque curve : http://www.automobile-catalog.com/curve/2013/1861340/bmw_z4_sdrive28i_automatic.html
35is torque curve : http://www.automobile-catalog.com/curve/2010/1199255/bmw_z4_sdrive35is.html

I hardly think it makes it a low-end torque monster :wink:

I'm referring to the 3litre n52 engine the 28i replaced, it knocks it into a cocked hat for torque
Rob

 

[willgill]

Ah ok my mistake :?

Looking at the flat spot at the top of that 28i torque curve though I'd have thought you could explain the low end torque by it being a diesel :lol: :lol:

*runs*

 

[Pastry]

I'm referring to the 3litre n52 engine the 28i replaced, it knocks it into a cocked hat for torque
Rob

It's just a shame it sounds crap Rob

 

[Smartbear]

I'm referring to the 3litre n52 engine the 28i replaced, it knocks it into a cocked hat for torque
Rob

It's just a shame it sounds crap Rob

That it, I've had enough of the constant attacks-it's like being fooking married! :x

 

[Pastry]

I'm referring to the 3litre n52 engine the 28i replaced, it knocks it into a cocked hat for torque
Rob

It's just a shame it sounds crap Rob

That it, I've had enough of the constant attacks-it's like being fooking married! :x

I hear you can get a remap for that too but why would you want to increase their talk :wink:

 

[SteveSmith]

I'm referring to the 3litre n52 engine the 28i replaced, it knocks it into a cocked hat for torque
Rob

It's just a shame it sounds crap Rob

Do you think so??

It's was one of my concerns on test drive was the noise but I really liked it! Pops on over run, crackles on upshirts and a decent induction roar. It's no V8 but it's not a nasty sounding engine.

 

[Twin Turbo]

Has peeps who slate the engine of the N20 that is post 2013 -actually been in one - or heard one?

Earlier N20's did sound a bit naff TBH

 

[SteveSmith]

I can understand if it's all meant in jest but the N20 does take some stick on here! I think it's cracking and would most likely upset most 30i owners. But hey, who cares, you buy what you like

 

[Twin Turbo]

I can understand if it's all meant in jest but the N20 does take some stick on here! I think it's cracking and would most likely upset most 30i owners. But hey, who cares, you buy what you like

Agree, and 35i's

https://www.youtube.com/watch?v=0QpLRJrhqO4

 

[SteveSmith]

I can understand if it's all meant in jest but the N20 does take some stick on here! I think it's cracking and would most likely upset most 30i owners. But hey, who cares, you buy what you like

Agree, and 35i's

https://www.youtube.com/watch?v=0QpLRJrhqO4

You can't compare a modified 28i to a standard 35iS though!

I don't think my little 4 pot is an M4 killer, but it's certainly quick enough

 

[Twin Turbo]

I can understand if it's all meant in jest but the N20 does take some stick on here! I think it's cracking and would most likely upset most 30i owners. But hey, who cares, you buy what you like

Agree, and 35i's

https://www.youtube.com/watch?v=0QpLRJrhqO4

You can't compare a modified 28i to a standard 35iS though!

I don't think my little 4 pot is an M4 killer, but it's certainly quick enough

I would love find out @ Donnington - if a 35is could keep up

https://youtu.be/0n7gLJg7ACk

However without passenger should be able to get 1:27