Car shutdown after increasing Rail Pressure

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Re: Car shutdown after increasing Rail Pressure

Postby ecuedit » Fri Feb 02, 2018 2:41 pm

MothaHDI wrote:
ecuedit wrote:
map sensor can be installed and enabled in binary.
than you can convert the bin to be a map based...and inject fuel based on map pressure.
everything can be done.



Ok, is it worth? Cu'z remap its much simpler without map sensor. What are the advantages?
Do you think its worth increasing the rail pressure to >1500bar ? The car was made in 1999 and i have trust issues with reliability :roll:

depend what you want to achieve with your car.
to go over 1500bar you need another rail sensor - from opel astra H fits mechnically and it measures up to 1800bar,
you need also alter the rail pressure linearisation map to install it.

Also this pump can not sustain stable pressure over 90mm3 and over 1450bar. to get more pressure you need stronger pump also...
as i said everything can be done. We have pushed 2.0 hdi 90hp to 270hp with hardware upgrades...

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Re: Car shutdown after increasing Rail Pressure

Postby ecuedit » Fri Feb 02, 2018 2:45 pm

jtdpow wrote:
MothaHDI wrote:
ecuedit wrote:
map sensor can be installed and enabled in binary.
than you can convert the bin to be a map based...and inject fuel based on map pressure.
everything can be done.



Ok, is it worth? Cu'z remap its much simpler without map sensor. What are the advantages?
Do you think its worth increasing the rail pressure to >1500bar ? The car was made in 1999 and i have trust issues with reliability :roll:

you must know yuor car maximun rail pressure sensor to increase the rail pressure above 1500 bar
to prevent big pressure spikes increase rail pressure in small changes after 3000 rpm,for example;
3000 rpm- 1400 bar
3250 rpm- 1410 bar
3500 rpm-1420 bar
4000 rpm-1430 bar :thumbup:


by increasing rail pressure the affect on End of injection in high rews makes very important impact which for proper "engine timing" soi needs to be recalculated properly and precisely to get as best as possible result due to rail increase.

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Re: Car shutdown after increasing Rail Pressure

Postby jtdpow » Fri Feb 02, 2018 3:38 pm

of course ecuedit,but sometimes depends iq quanty and rail pressure,the stock soi its fine for stage 1 tune

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Re: Car shutdown after increasing Rail Pressure

Postby ecuedit » Sat Feb 03, 2018 1:08 pm

jtdpow wrote:of course ecuedit,but sometimes depends iq quanty and rail pressure,the stock soi its fine for stage 1 tune


that's the biggest problem if in some cases you leave stock by thinking all will be ok, but if you check for example stock map that in higher IQs that was never used but map is written all the way - for example SOI somewhere around even 40 degrees :lol: , and by increasing IQ you are automatically dropped in the area of the map where SOI increases automatically by 15 degrees and more...but that area of the map was never used before as that iq was before never achieved...

that is normally trick in Fiat/Alfa/Lancia and almost nobody check values by thinking they are stock...
In BMW there is a trick with boost - it increases automatically by more than 0.5bar...and so on ;) and that's also one of the reasons why people have so much blown turbos.

picture attached

p.s. almost every producer has it's own tricks to make your engine degrades faster when changing values and not recognising them.
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Re: Car shutdown after increasing Rail Pressure

Postby MothaHDI » Sat Feb 03, 2018 2:00 pm

ecuedit wrote:that's the biggest problem if in some cases you leave stock by thinking all will be ok, but if you check for example stock map that in higher IQs that was never used but map is written all the way -


Oh no... i'm currently with 1450bar and are you saying that i need to change the calibrations of the injectors? Is it mandatory? I dont feel comfortable changing them :o

I've seen alot of projects that went wrong because of injector calibration :/ I will study it, if you have any thread or a pdf to help, it would be awsome :thumbup:

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Re: Car shutdown after increasing Rail Pressure

Postby uberderv » Sat Feb 03, 2018 7:30 pm

As I understand it MothaHDI you have to look at standard EOI for the IQ/RP then with your increased values you can calculate shorter duration and alter SOI maps.

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Re: Car shutdown after increasing Rail Pressure

Postby ecuedit » Sat Feb 03, 2018 8:41 pm

uberderv wrote:As I understand it MothaHDI you have to look at standard EOI for the IQ/RP then with your increased values you can calculate shorter duration and alter SOI maps.

thats correct, also your duration map on rail axis goes only up to 1400bar..so if you did not alter your axis and recalculate duration time, you are injecting fuel at higher pressure and same duration...and you are injecting more fuel that ecu actually "thinks".

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Re: Car shutdown after increasing Rail Pressure

Postby lyecon » Sat Feb 03, 2018 11:54 pm

ecuedit wrote:that's the biggest problem if in some cases you leave stock by thinking all will be ok, but if you check for example stock map that in higher IQs that was never used but map is written all the way - for example SOI somewhere around even 40 degrees :lol: , and by increasing IQ you are automatically dropped in the area of the map where SOI increases automatically by 15 degrees and more...but that area of the map was never used before as that iq was before never achieved...

that is normally trick in Fiat/Alfa/Lancia and almost nobody check values by thinking they are stock...

There are worse things than that, unluckily.
Sometimes, when reading a DAMOS described file, I get the impression that I'm looking at some beta version of a student project, unfinished and broken.

BTW, some new cars occasionally puff a black smoke cloud for no reason, and the reason is simply that broken firmware. BOSCH should stand trial for that much more than VW.

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Re: Car shutdown after increasing Rail Pressure

Postby MothaHDI » Sun Feb 04, 2018 8:48 pm

OK, so thx to Alex.T for this awsome tool, i have my EOI (stock and MOD). So what do i need to do now? Try to match the stock with the moded EOI? and what about the axis that ecuedit was talking about? which one is it?

Thx for the answers :thumbup:
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Re: Car shutdown after increasing Rail Pressure

Postby MothaHDI » Thu Feb 08, 2018 2:22 am

ecuedit wrote: We have pushed 2.0 hdi 90hp to 270hp with hardware upgrades...


Can you tell me wich upgrades you did?

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