[Naiters]

Originally Posted by Gen13 F36

Last part was a general statement

Maybe PTF could post some of their statistics (n20 OTS Stage 2 downloads H/L for example) to shed some light on that reliability .

N52 can blow too:

[Luverse]

Originally Posted by Gen13 F36

Last part was a general statement

yeah, but i said might help, so it's not 100% will help

even F1 engine which built for racing, blown

[MilanF30]

Originally Posted by Gen13 F36

Wtf... are you serious... you believe you can add more power without risk.

Look Honda 2.0L NA called K20A can make power thru turbo plus tuning(hondata). Stock power is 195hp. Turbo and turning you be making 280hp. Yeah those blow up too.

There is always possibility that your N20 will blow up...your adding more stress to a motor rated at 240hp.

Anyway for everyone who said BMW sucks....you are still here are you not

And what are you saying? That it doesn't suck?
C'mon man have you seen that K20A engine stripped down? Compare that to N20... look at the timing chain and guides alone?
K20 has double row chain and metal body guides compared to single row thin chain and "child toy" plastic guides.



N20 is made cheaply and designed poorly. And that does not belong into a $50000 car (when new).

And that SUCKS big time!

btw. we are still here because we still have the car, but where are the guys whose engine blew up or disintegrated itself by broken chain?

[hybris]

Originally Posted by peter3hg

I agree in standard driving/cruising it was fine.

In all fairness a lot of the issues are probably more to do with gear ratios (my car is a manual) stopping me getting full benefit from the extra power. I found that in first gear the car was traction limited except on well surfaced dry roads which are a bit of a rarity around here.
In second peak power was above the speed I would normally be accelerating hard to, except when joining a motorway.

So you have tuned your car, and your main complaint is that it is too powerful / too fast?

[Luverse]

Originally Posted by MilanF30

And what are you saying? That it doesn't suck?
C'mon man have you seen that K20A engine stripped down? Compare that to N20... look at the timing chain and guides alone?
K20 has double row chain and metal body guides compared to single row thin chain and "child toy" plastic guides.



N20 is made cheaply and designed poorly. And that does not belong into a $50000 car (when new).

And that SUCKS big time!

btw. we are still here because we still have the car, but where are the guys whose engine blew up or disintegrated itself by broken chain?

i'm still here bro
blowm my N20 engine, rebuilt it, sold the car, then buy B48 engine and tune again
oh how much i must love BMW

[MilanF30]

Hahah how masochistic you are (Don't get offended, I'm joking )
No but really, I love the car also, I just hate the engine!

[Luverse]

Originally Posted by MilanF30

Hahah how masochistic you are (Don't get offended, I'm joking )
No but really, I love the car also, I just hate the engine!

hahahaha.. at first, i was planning to buy G20, but man, it cost US$ 100.000 for same engine, just a whole new platform and feature

[MilanF30]

Yes it's too expensive for just gimmicks and makeup.
I prefer the F30 looks anyway, I just hate the engine

[floridaorange]

Originally Posted by MilanF30

btw. we are still here because we still have the car, but where are the guys whose engine blew up or disintegrated itself by broken chain?

Bingo.

I'm still around to learn about these cars but most blown engine owners are not.

[GreenF30N26]

Talking to PTF they've said most issues coming from N20/N55 are due to shitty fuel injectors, which if I'm understanding right can lead to cracked pistons. Stands to reason that everyone should be logging early and often to ensure the car's operating properly.

[MilanF30]

Fuel injectors? How? What that has to do with cracking pistons?

[GreenF30N26]

Originally Posted by MilanF30

Fuel injectors? How? What that has to do with cracking pistons?

I just googled it. Seems rare but if N20/N55 has crap injectors this can happen.


faulty injectors can't be overlooked or ignored for long. Dirty or worn-out injectors can also cause preignition or detonation [source: Carley]. Detonation is a fairly common problem in which gas remaining at the end of the normal air/fuel burning cycle (which is set off by the spark plug) spontaneously combusts. Detonation is harmless in some cases, but the pressure has potential to break engine components and cause pitting and scuffing around the pistons. Preignition is when the air and fuel combust before the spark plug fires, causing severely increased engine temperature and damaged pistons. This problem is much more likely to pinpoint a leaky injector than detonation is, because it's a relatively rare occurrence in fuel-injected engines.

[Gen13 F36]

Originally Posted by MilanF30

And what are you saying? That it doesn't suck?
C'mon man have you seen that K20A engine stripped down? Compare that to N20... look at the timing chain and guides alone?
K20 has double row chain and metal body guides compared to single row thin chain and "child toy" plastic guides.



N20 is made cheaply and designed poorly. And that does not belong into a $50000 car (when new).

And that SUCKS big time!

btw. we are still here because we still have the car, but where are the guys whose engine blew up or disintegrated itself by broken chain?

Well... what I'm saying is tuning comes with risk... I love the idea to have a 2.0L inline 4 making 500 hp plus. Shit I did that on my Nissan S14... but do you know how much for a built engine Tomei built engine for Japan GT350. Right its $12000 for a short block 2.0L.

As there is a thread on this forum for a N20 build with strong internals. I bet he will need about $5k minimum to start with that build.



I want to build on this engine but the BMW tax is keeping me off.


On the side note... I'm staying stage 1... not going further anymore. Just want to enjoy the car without blowing my pocket

[chowser51]

Originally Posted by Gen13 F36

On the side note... I'm staying stage 1... not going further anymore. Just want to enjoy the car without blowing my pocket

I have the B46 and was considering a catted downpipe (emissions checks in my area) and moving to stage 2 but decided to just keep it at stage 1 and get a B58 or better next time around. I'll leave stage 1 93 flashed when I give the car to my daughter in a few years.

[Luverse]

Originally Posted by Green33

Talking to PTF they've said most issues coming from N20/N55 are due to shitty fuel injectors, which if I'm understanding right can lead to cracked pistons. Stands to reason that everyone should be logging early and often to ensure the car's operating properly.

so we had to constantly check the fuel injectors? or maybe replace it?

[pierreye]

How to check the fuel injectors? Does it show any error code or tell sign? Looks like I'll be more diligent using Techron Concentrate Plus to clean the injector.

[DadzBmer_N2o]

Originally Posted by Green33

I just googled it. Seems rare but if N20/N55 has crap injectors this can happen.


faulty injectors can't be overlooked or ignored for long. Dirty or worn-out injectors can also cause preignition or detonation [source: Carley]. Detonation is a fairly common problem in which gas remaining at the end of the normal air/fuel burning cycle (which is set off by the spark plug) spontaneously combusts. Detonation is harmless in some cases, but the pressure has potential to break engine components and cause pitting and scuffing around the pistons. Preignition is when the air and fuel combust before the spark plug fires, causing severely increased engine temperature and damaged pistons. This problem is much more likely to pinpoint a leaky injector than detonation is, because it's a relatively rare occurrence in fuel-injected engines.

Originally Posted by MilanF30

Hahah how masochistic you are (Don't get offended, I'm joking )
No but really, I love the car also, I just hate the engine!

Hey speaking of that, this is the oil i am gonna use nxt change to avoid that (LSPI) problems:

[Naiters]

Originally Posted by DadzBmer_N2o

Hey speaking of that, this is the oil i am gonna use nxt change to avoid that (LSPI) problems:

Any symptoms of a fuel injector going bad (pre-code showing off obviously)? I guess excessive smoke from pipes etc.?

[GreenF30N26]

Originally Posted by Luverse

so we had to constantly check the fuel injectors? or maybe replace it?

PTF is suggesting they can tell if issues from logging so yes it would be ideal to have them check logs maybe monthly or more depending on how often you drive the car. In your case you only had the time for a very short period so maybe the issue was already there and the tune just set it off. No magic bullet to save all engines just need to do what we can to help ensure the tune is running healthy and sending logs is the only way to detect this one it seems.

[DadzBmer_N2o]

Originally Posted by Naiters

Any symptoms of a fuel injector going bad (pre-code showing off obviously)? I guess excessive smoke from pipes etc.?

No none yet for my engine, but i'd rather take pre-emptive measures to insure a better chance to survive this for the long miles ahead. I wanna keep her for as long as my wallet can hold up lol, i have only 43k since it was bought CPO'd w/ 32k in 2016.

[CandyRedRC46]

Originally Posted by Gen13 F36

Wtf... are you serious... you believe you can add more power without risk.

Look Honda 2.0L NA called K20A can make power thru turbo plus tuning(hondata). Stock power is 195hp. Turbo and turning you be making 280hp. Yeah those blow up too.

There is always possibility that your N20 will blow up...your adding more stress to a motor rated at 240hp.

Anyway for everyone who said BMW sucks....you are still here are you not

https://honda-tech.com/forums/k-seri...right-3144444/

Try +600whp, but ok....

[CandyRedRC46]

Originally Posted by DadzBmer_N2o

Hey speaking of that, this is the oil i am gonna use nxt change to avoid that (LSPI) problems:

If you want to prevent LSPI, stop lugging your engine and have a low torque tune made....