ECU remaps explained - BOOST

Next question. How much will blow up my turbo?

[vPerformance]

Sorry I don't do remaps, I'm just a bloke with a cable from ebay, and a few books.

[klstrucker]

Still one thing that wonders me: if you have mechanical wastegate actuator how can you adjust boost pressure by chiptuning?

[hritrabs]

Thanks for being so clear and honest. Really appreciate that. Well done. Keep it up.

[jordanmcshannon]

Haha never have to much.. but don’t put too much in... but ... never enough.. ok good !

[mariovieira]

hi, , i have a focus 1.6tdci, how a can remap my car??i bought the mpps, but i dont know how remap. can you help me??

[cgavin]

I'm guessing you can remap your ecu for MOT to totally game the emissions tee hee.

[dwightlooi]

You did a bad job explaining the efficiency map and kinda suggesting that you don't know what it is called doesn't help with audience confidence! Let me help you...
(1) It is called and EFFICIENCY MAP. If you google your car you can probably find out which turbo it uses. And, if you google that model of the turbo -- e.g. KKK K03, Mitsubishi TD05H-15G or Honeywell GT2048, etc. -- you can track down its data sheet and efficiency map!
(2) The vertical axis is boost pressure. The horizontal axis is airflow. The island contours say how efficient the turbo is at any specific boost pressure and airflow! Some maps also have a set of frontiers going from the bottom left to the top right telling you how fast the turbo is spinning but that is less important!
(3) Now, find out how much boost your uses stock. Add 1 to that number because the efficiency map is in absolute atmosphere. Draw a horizontal line from left to right on the efficiency map. This is where your turbo is operating along in an ideal and simplistic world where turbos make boost at zero rpm and the ECU allows boost to rise unchecked to your maximum prescribed boost then hold it till the redline.
(4) Now... find out where your engine makes maximum torque. Chances are that is where it is closest to 100% volumetric efficiency; where the cylinders fill completely with each stroke! A little simple math of the displacement of your engine times the rpm divide by two (because each cylinder draws in air once per two rotations of the crank in 4-stroke motors) will give you the amount of air it is ingesting at that speed. Now put a big dot on that horizontal line, congratulations you just plotted where on the map your motor is operating at at maximum torque!
(5) If you have an ideal engine which operates at full efficiency you can now plot where the turbo is operating at from idle to the redline proportionately. E.g. If your max torque is at 2500 rpm and the redline is at 6500 rpm then you simply go 6500/2500 = 2.6 times the way to the right on that horizontal line to figure out where your turbo is at at the redline! You can repeat this simple process to estimate where it is at for any rpm! Do it for max horsepower too. And highlight the line segment connecting mac torque, max hp and the redline!
(6) In reality though that is not how it works because your engine does not have constant and full volumetric efficiency. So, the points on the line are not evenly spaced. The line also does not start left edge because beyond the last "contour" on the island (the surge front) your turbo doesn't make jack shit in boost. Modern ECUs also vary boost over the rev range, typically reducing it at the top end and at certain other conditions such as the in deference to theme torque limit map. But I want you to ignore that for now to keep things simple.
(7) When you remap boost you are moving this horizontal line along with your highlighted segment up and down. That is what's important for you to know. Do it too much and it no longer passes through the nice, high efficiency contours. So look at the bloody map and figure out how far up you can go and still have that line clip at least the top several contours. You can generally go 15-30% over and still do that.
So there you have it. Now you can put that efficiency map to good use! Have fun!

[c.ll.l]

THANKS alot for your great videos!
Please excuse my English... I'm French.. (well anyway you sound scottish, so I also pardon your English );p
One thing first: I want to clone an ECU from my citroen to another ECU I bought on internet. Will it work with only a read (from the original)/write (to the one I bought) procedure, using my MPPSV16 or does the new ecu need other information (ID or whatever) to work on my car.

Secondly, do you know a website suggesting free map to try on différents car?

And last, it would be really interesting to show us a step by step exemple of remapping an ecu from stock, so we can see the step orders, the values that are "reasonable" etc

I'm really new in this so, once again, thank you much for sharing your acknowledges!!!

[christopherleishman]

Vw golf mk5 2.0 tdi bkd 140 I have 2.6 bar of boost and 410nm torque

[vPerformance]

The short answer is yes. It certainly can. Although - there are limits to what the turbo can do because of dimensions and many other things. A remap can request the turbo comes on sooner and/or with more force, and request extra fuel to keep the system balanced and working safely with the extra power.

[c.ll.l]

I read you learned from book. Could you advise one for newbies in this field (I know about mechanics and electronics. I mean new in ECU mapping)

[baviaanshit]

Hi, i have a question.
When i'm doing 120kph with my Ford S-max 2.0Tdci 163hp. It take's a while when i feel that the boost is at full pressure. Doing 2300Rpm at 120Kph and it take's to 2800Rpm when it really starts I Don't like that. Will an engine remap change that?

[autoservice]

You have an email adress? Sorry for my bad english. I apreciate much if you take me a little help whit some ideas for my ecu map on renault laguna 1.9dci. I don't understand the overboost, and i dont know how much i can modified this overboost. Thanks

[furayboy]

What polo have you got bud ? I have a 6r gti twincharged 1.4 been riddled with problems missfiring issues ever after a rebuild. ??

[acksvtr]

Firstly, thanks for the great video's :)
Secondly....im getting into tuning, cause the tuners in my country are ridiculously priced....i grand for a
Iv got an Opel Coupe 2.0 turbo (vauxhall/holden in some other countries) - saw you had one :) looking at putting on a ph3 map and doing the mapping myself, but....afraid i might have other questions. If you dont mind, is there any email address I can mail you on? this is going to be my first tune :)

[rickpercy]

Awesome videos, man! I have an arosa tdi (AMF) I'm pretty sure it's the same as your Polo engine. Any chance I can download you map or maybe show us a tutorial step by step of what you did?

[padimac]

been looking into getting superchips bluefin remap for my focus st tdci. supposedly adds a safe 39bhp, and 90nm of torque where needed. does anyone have any experience with remapping diesel engine's.

[warwickdean]

have you ever used ecm titanium or does vag suite correct checksum of mod file?

[alireza]

hi useful info i just bought 1.9tdi golf mk5 and like to remap it what is the safest option to not mess the turbo and engine as its already run around 145000 mile but service regularly and engine and turbo in a good condition and i only need some power and torque to use when i needed
any advice pls
and what's a best temporary chip device for 1.9tdi so i can unplug when i want to

[CraigGT]

I think you should point out to people that are watching this and have no idea about ecu mapping that they need to think about turbo speeds. As a engine calibrator we spend months mapping for engine and comp life. Winding the boost up will push your turbo speed to the limit and if they do this on a high baro day they will have a dad day on a low baro