[delarock]

Hi guys is Tu HPFP enough for MHD stage 2+ ? OF course together with 300 cell catted downpipe and maybe high flow air intake. Or do i need Dorch Stage 1 ?
I will run Ron 98 map gasoline in europe ( RON 100 fuel)

[marcthedark]

Not being able to keep up the fuel pressure (aka provide enogh fuel) isn't one that appears with little or no E. But once you add more Ethanol at some point the fuel pump will not being able to keep up anymore. So the TU pump provides headroom for stock turbo up to around 40-50% E mix. With a big turbo you need Dorsch 1/2/....

[delarock]

sorry i didnt fully understand your answer ( not native speaker) but iam interesting in stage 2+ just with regular fuel - no any etanol addition etc)

So in. this situation TU pump isnt enough for Stage 2+?

[G.Newt]

TU will be plenty for Stage 2+ 98 RON. Also it's very good you're using 100 RON as that will help limit timing corrections.

[Skyhigh]

The TU pump is more than enough for Stage 2+ on pump gas. And generally for any of the MHD OTS Stage 2+ maps! Only if you go custom map and Ethanol blends you may need a more potent HPFP.

But please bear in mind that MHD Stage 2+ RON 98 has the same maximum power as Stage 2 RON 98... don't expect much of a difference. According to MHD there is only a minor improvement in mid-range, but the max power is the same. You need higher octane fuel to make gains with Stage 2+. Point being it may not be worth it going for Stage 2+ if you are only going to use RON 98 fuel.

[delarock]

Thanks for answers guys, i will use still ron 100 fuel so i will try both stages - MHD advertise Stage 2+ simillar HP gains( slightly more) but much higher torque. I need to test it

Do some of you use stage 2+ for daily driving ? Is daily driving comfort much decreased? thanks.

[Skyhigh]

Don’t expect miracles from Stage 2+ 98 vs Stage 2 98. To me the difference is very subtle. There is also no measurable 0-100 difference.

Why would you not be able to drive Stage 2+ daily!? People drive Stage 3 and 800 p.s. as daily, what’s the issue? It is up to your foot. It is not a real rocket The comfort is not affected by engine power…

[delarock]

Ok i will try it first stage 2+ and check the corrections etc.

One stupid question, i have bimmer link. Which parameters should i log after Stage 2+ ? Thinking about corrections etc you mentioned. Of course i will check for misfires but how can i check timings and correction ? do i need another SW for this purpose?
Skyhigh on my place, would you go stage 2 or stage 2+, i will update TU HPFP because i have 130 000 kms and iam changing injectors too.

[Skyhigh]

You log with MHD, not with bimmer link!!
https://f30.bimmerpost.com/forums/sh....php?t=1648722

[delarock]

Ou thanks ! i will purschase the licence.

And last question so on RON 100 gas and RON 98 map would you flash Stage 2 or stage 2+. Are there any cons for stage 2+ in term of realibility? As i stated i would upgrade HPFP regardless the stage.

At your country do you have RON 100 or just RON 98 gasolines?

[G.Newt]

Originally Posted by delarock

Ou thanks ! i will purschase the licence.

And last question so on RON 100 gas and RON 98 map would you flash Stage 2 or stage 2+. Are there any cons for stage 2+ in term of realibility? As i stated i would upgrade HPFP regardless the stage.

At your country do you have RON 100 or just RON 98 gasolines?

Try the Stage 2+ first. Take a log, then step down to Stage 2 if you're seeing excessive timing corrections.

[Skyhigh]

Originally Posted by delarock

Ou thanks ! i will purschase the licence.

And last question so on RON 100 gas and RON 98 map would you flash Stage 2 or stage 2+. Are there any cons for stage 2+ in term of realibility? As i stated i would upgrade HPFP regardless the stage.

At your country do you have RON 100 or just RON 98 gasolines?

As long as you use RON 100 fuel and it is of decent quality (don't take it for granted!) - you should be fine on Stage 2+ RON 98. In reality - my observation is that Stage 2+ is more forgiving for fuel octane deficiencies than Stage 2, as it seems to run more boost and less timing (but that's not definitive, just my own observation).

So give Stage 2+ 98 a try, do a proper log and post it here - we will help you with the analysis. Just make sure you do a proper log as per instructions in the other thread.

In my country the highest octane fuel available is RON 98... unfortunately.

[delarock]

Ou thank you very much. Next week i have a plan to do downpipe, HPFP and injectors replacement and than i will post my log here

For example in Slovakia we had big test of our gasoline, and RON 100 fuels have even little bit higher octane number (100,5 etc)

[DieselDuck]

Originally Posted by delarock

Ou thank you very much. Next week i have a plan to do downpipe, HPFP and injectors replacement and than i will post my log here

For example in Slovakia we had big test of our gasoline, and RON 100 fuels have even little bit higher octane number (100,5 etc)

Injectors replacement ? Why ?

And to answer your initial question tu hpfp is plenty for mhd stage 2+, I only seen slight railpressure dips when I'm running over 50% ethanol on the E40 map, but as you're running on pump gas there won't be any issue.

[delarock]

Hi guys, so my B58 underwent some tunning
Car has 120 000 km
Coils are original
Plugs original Bosh 5000 km old
300 Cell EURO 6 CAT from HJS
New bosch injectors
TU HPFP fuel pump upgrade
Intake remained stock.
Coils
I flashed there Stage 2 98 RON( i always tank 100 RON Premium fuel), for me absolutely enough for daily driving. During ride i didnt feel any problems, no cells etc - little more smell from exhaust)

First i checked bimmerlink: During cold start i got some misfires on certains cylinders, for examle when i rev to 2500 RPMS i still get new misfire on cylinder 4. During a 300 km ride occasionally have 1 misfire on cylinder 1 and 4, engine runs flawlessly. 98 percento f ride 0 misfires.

So then i bough mhd monitor and here are the logs. On some cylinders i had corrections up to -3… Is this normal?

I would like to kindly ask to check the log (i tried to measure from 2 to - 6k :

[Skyhigh]

Please upload logs to datazap and paste link. This is a pain otherwise.
To your question - you always need to look at the big picture and tendencies. Answering whether individual corrections down to -3 are good or bad would be incorrect without taking the full picture into account.

Regarding the sporadic misfires you have seen with bimmerlink - read this thread (and linked within other threads): https://f30.bimmerpost.com/forums/sh....php?t=2080129

[delarock]

https://datazap.me/u/delarock/log-17...og=0&data=3-18
https://datazap.me/u/delarock/log-17...og=1&data=3-18
https://datazap.me/u/delarock/log-17...og=2&data=3-18

thanks

[Skyhigh]

Unfortunately neither of the logs is usable. You should read the first post here about how to make proper logs. You need WOT (full throttle) from about 2500 RPM to about 6500 RPM:

https://f30.bimmerpost.com/forums/sh....php?t=1648722

[delarock]

Is this better? i went on manual mode from 2000 rpm to 7000 rpm on gear 4 . Looks like cylinder 1 need some corrections ….

https://datazap.me/u/delarock/log-17...3?log=0&data=3

[Skyhigh]

This is not a valid log either. Look at your RPMs. It is far from a linear increase.

https://datazap.me/u/delarock/log-17...?log=0&data=20

Not sure what went wrong, looks like big chunks of data are missing. But it does not look like WOT either. Your throttle is also not at 100%, but at 73-78%. Also - do not start at 2000. Start around 2500.

[delarock]

ok i dont have good road condition ( high traffic so at evening i will record new graph. sory but what is WOT?

so start at 2500 rpm , full throttle but not kickdownpedal, sport plus mode.

[DieselDuck]

Originally Posted by delarock

ok i dont have good road condition ( high traffic so at evening i will record new graph. sory but what is WOT?

so start at 2500 rpm , full throttle but not kickdownpedal, sport plus mode.

WOT = wide open throttle. So yep, full throttle. 4th gear should be good if your tyres are warm and the road conditions are OK.

And correct, go WOT in 4th at around 2500 rpm to 6500rpm, your gearbox in S, manual mode, in either Sport+ or DSC OFF. Do it in a remote and safe area as you will be going pretty fast