Roland@pcmtec

Assuming you added a lower friction under drive pulley? No other changes? There is an engine friction model and torque at idle table which would be the proper way to fix this. You could also fudge it my adjusting the idle air flow or even just dropping the idle rpm. I'll have a look at what the tables are called for you when I'm on a PC Edit: could be an idle air leak as well. Eg if a vac hose has come off that will cause this as well. What is your idle spark sitting at? This will tell us if the spark is pegged at 0 degrees etc.

Too early for that, we don't even have a pause/stop button yet! When it is closer to release we will let people know in here if they would like it trial a beta version. I'm working on this close to full time at the moment, so it should happen soonish! What do people say these days, 2 weeks away? ?

Yep this is basically it. The WOT setpoint is defined by another scalar however as this map only goes to 500 the PCM will peg the values at this bottom row from 45% onwards.

Are you taking the piss?

Yaxis is throttle. 500 is roughly 45% So 0.87 dropping to 0.75

Data logger development is back underway. We now have dynamic logging where you can select/deselect channels in the middle of a log. The video is mainly to demonstrate the mouse pan/zoom features which does away with the need for a manual axis setup which can be very time consuming to set up. The layout will still be changed quite a bit. Ultimately we will be aiming for a layout similar to the mockup below with 4 main charts each with 4 (standard) or up to 8 traces per chart. The current value and label will be shown on the side. There will also be a grid view with all active scalar values, this will mainly be for logging text values (torque sources) etc and you don't require a graph view.

Great news!

You can check this by opening up the stock tune file or reading it from the vehicle. Lambda stoich is usually 14.63 from the factory which they will command at idle and cruise. This is a typical base fuel map for an XR8. Remember there are lambda modifiers as well. Eg exhaust/cat overtemp (0.7 lambda) and enleanment for torque reduction (1.05 lambda).

FYI I've put some more information regarding this here:

A few people have asked how to remove the throttle limit on the 5.0L supercharged vehicles. A good way to start with these kind of problems is to compare the FPV or Sprint calibrations to a stock calibration. Eg a FPV 351 auto calibration is HAFJ1K2 and a standard 5.0L auto calibration is HAFH5HB Here you can see the following tables have been tuned by Ford. Desired throttle angle (auF0077) increased from 419 to 579 Throttle Angle auF0083 has been increased from 60 to 80 Throttle Angle B auF0084 has been increased from 60 to 80 IPC conversion of percent accelerator pedal angle to desired throttle angle auF12514 Delta pressure across the throttle plate auF10980

Do you have the tear tag/calibration ID for the FPV 351? Without this no one will be able to do this for you.

If you log the throttle and spark what occurs?

Negative numbers are going to spike boost quite dramatically. I think this will be your solution. This will also activate during knock retard, so if you had a lean out during cornering etc this will stop a boost spike. Let us know your results. I would be very curious to see a before and after data log as well.

I've also heard of someone leaving the car in closed loop and setting the base duty cycle to be 10-20% lower than what is required. Eg command 40% duty cycle when 55-60% is required for the boost in the desired boost table. Then during a gear shift (open loop duty cycle will be forced) it will drop to 40% stopping the overboost. This is probably the wrong method, however it is very quick and easy if you are limited on time.

Yes this will limit boost on a gearchange, the problem with this is it will hold it for too long, so you'll get the opposite, a boost drop on gear change. I would recommend playing with this table instead: auF3002 Change in spark adder to waste gate duty cycle. During a gear shift you should be getting spark retard (what causes the boost spike). Log the spark during your gear shift and work out the spark delta. Eg if you should be getting 12 degrees spark at 5000 rpm 2.2 load, and on a gear shift you see 2 degrees your spark delta is 12-2 = 10 degrees. Hence the PCM will be multiplying the waste gate duty cycle by -0.0135. Eg a 1.35% drop. So if you were commanding 20% duty you would see 20 + (20 * -0.0135) = 19.73% duty cycle. You could then try blowing these numbers out drastically, eg change the cell at 10 degrees to -0.2 (20%) so you get a 20% reduction in duty cycle. Eg you would see 16% duty cycle instead of the commanded 20%

Dynamic units are not too far away! Edit: as of 1.11 dynamic units are available.

Snippet of the dynamic units on the scalar lists that is almost complete.

Yes it will show everything. The data is there it is just hidden until you license it or use the populate unlicensed file feature.

Yes you need to license it or use the "populate unlicensed file" option.

If you could only see the TCM then either the PCM was not read or the PCM was not licensed. If you flashed this file into the car it wouldn't have done anything other than flash the TCM

Update. We are working on dynamic units and this should make it into the next release. All common units (volumetric/mass flow, pressure, temperature etc) will be changeable. Eg in the scalar list view the units will now be a dropdown menu allowing you to change them. We will also have bulk "Use °C everywhere" options etc. Our new employee Scott is working very hard on this at the moment.

What do you mean "there seems to be more to the tune than what is showing up in the navigator" ?

For anyone who is interested this issue was due to the memory constraints of the Mk1 FG operating systems, they can only have a smaller subset of features enabled as they control the 5R55 5 speed auto via the PCM which takes up a lot of memory. There are alternative operating systems available that will work in the FG Mk1 if required (providing you don't have the 5R55 transmission) or you can just use a subset of the custom os features (eg a slightly smaller subset of flex fuel tables).

Second fuel pump could be turned on with the imrc runner output. This wouldn't be tune dependent but rather rpm dependent. Will you be doing all of this yourself? It will be fairly time consuming to set up, but it this is a hobby car and you have the time I think there are a few solutions.

Should be doable. You could set up 3 different stoichometric ratios and have a 3 position switch. You could then have two different injectors slopes as well. Same with spark. You could set up 2 spark maps and have the third position use some combination of the two. So you would only have dual maps, but providing the 3rd map is some combination of the other two maps you can effectively make a third one with some limitations. Would be a bit tricky to set up, but I think you could make it work with a few compromises. Otherwise just take your laptop with you and run two tunes. One for the strip, then use the dual map custom os for the daily duties.