Roland@pcmtec Posted July 31, 2018 Share Posted July 31, 2018 This is a guide to set up a ghost cam on a BF/FG. This involves understanding how the VCT system in the falcon works. NOTE. This is NOT emissions compliant. This cannot be done on a road car, it must be for vehicles that are used on a racetrack or a powercruise event etc. This is the same as using aftermarket cam shafts. The unburnt fuel will not be cleaned up by the catalytic converter and you will be releasing high levels of carbon monoxide (NOx should be quite low as it is running rich, not lean). Do not leave your car idling in a shed with poor ventilation. E85 is much safer than Petrol however it is still not recommended to breath in the gasses. Firstly the VCT works by the PCM calculating an intake camshaft position, it then adds the calculated overlap angle to this position to calculate the position of the exhaust cam. Eg: VCT_Intake_Cam = Calculated Intake position VCT_Exhaust_Cam = VCT_Intake_Cam + Overlap_Angle. Finally to confuse things the PCM then adds/subtracts from the intake and exhaust cam based on boost error. Note this in only in the FGs. This will not affect idle however it will affect your vehicles performance depending on how you have set up the boost control. To achieve a ghost cam we need to understand how the overlap angle is calculated. There are 3 modes of VCT operation cam source == 4 is Idle mode cam source == 99 is VCT Fault/Not Installed mode Cam source == 3 is power/full throttle mode cam source == 2 is part throttle mode. Now in idle mode the camshaft overlap is capped by the same table that determines the intake camshaft position, so you cannot achieve any overlap, the best you can do is set both the intake and exhaust camshaft to 50 degrees which will give you some lump. An easy solution to this problem is to force the PCM into cam source == 3 at all times. This means the main VCT tables are used at all times making tuning the vehicle much easier. To force the camshaft to use the main maps at all times simply set these scalars out of range to -1000 rpm. auF1079 (VCT Closed throttle disable RPM) set to -1000 auF1035 VCT Closed throttle enable RPM) set to -1000 Now to get a ghost cam the following tables need to be modified auF0115 (BF/FG) Maximum allowed overlap angle based on RPM and Oil Temp. Set the lower half of this table to 80 degrees Now we can change the commanded overlap at idle via auF16492 (BF) auF0116 (FG) Here you can see I have commanded 35 degrees of overlap at a TPS reading of 5, this means as soon as you touch the throttle the cam timing goes back to stock making car parks and low load no problem. You also need to modify auF16503 (BF) auF0097 (FG) to have similar timing values in the low load/low tps cells. In this example I set 600 rpm to -30 deg to stop the vehicle from stalling, this will also increase the lope when the rpm drops low as the decreased overlap will kick the rpm back up again. I changed auF0494 (BF) auF16487 (FG) (TPS) axis to 5 in the lowest cell, this means you keep the commanded overlap when hot/cold. Finally I suggest increasing your idle rpm to 1000 rpm to avoid stalling. In the FG there is an overlap adder for speed density auF2260. You will need to put smaller values in the 30 and 60 degree overlap cells. This will clean up the idle fuel trims. BEWARE that some FGs command 30+ deg of overlap when coming onto boost, if you modify this table you may be modifying the WOT fueling as well. If you are using a multi-tune another way to clean up the idle AFRs is to simply add the slope of map table to the tune. auF2928 may be a more suitable table to use for the FGs as it also has an RPM component. It is also recommended to disable LTFT when the ghost cam is active by adding this to your ghost cam tune. This will prevent closed loop fueling from maxing out adding fuel (auF0164) Beware that if you command too much overlap you will foul your plugs and the car will misfire until they clean up. 35 degrees is quite a lot and I would only recommend this as gimmick not in a daily driven car. Here is a video of what the above settings will sound like. As you can see low speed reversing etc is not a problem. Edit: This is possible to do on a BA if you use HAAT3VC or possibly HAAT2xx as these are the late model FPV BAs that had independent cam control. Edit 2: You can increase the lope quite dramatically by modifying this table (auF11706). This is the proportional gain of the idle spark feedback algorithm. By increasing it to 5000 it will toggle between min spark (-7) and max spark (MBT ~25 deg) causing even more lope. In the 5.0 Coyote v8s we have found the figures below tend to give quite a good result without even touching the cam timing. There can be a hesitation when transitioning from idle to throttle, so you may need to add timing to the low load main spark map to help the transition. In the 6 cylinders the numbers don't seem to affect drivability much so you can put silly figures like above without issue. If you are using the multi tune to do ghost cam you can add the following table to the ghost cam tune to increase your idle rpm, this means the non ghost cam tunes can retain a completely stock idle rpm. Here is an example of the required tables in a BF to add ghost cam to to tune 4 only if utilising the multi tune functionality. Value files now available for FG and BF 3 Quote Link to comment Share on other sites More sharing options...
fordsrule Posted July 31, 2018 Share Posted July 31, 2018 i'm keen to try this but is there a possibility of doing damage? thx, steve Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted July 31, 2018 Author Share Posted July 31, 2018 If you have stock cams providing you don't you don't touch the tables such as "Expected position of cam hardstop" you will be fine. If you change these tables you run the risk of hitting the physical interlocks to stop the cams from causing valve piston interference. If you run aftermarket cams and extend the overlap even further again (no one would do this) via the VCT system there is a possibility of valves making love to the pistons depending on the cam design. The only other risk is fouling your plugs if you leave it idling lumpy for a long time without your air fuel/spark being correct. However that is no different to running actual cams Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 1, 2018 Share Posted August 1, 2018 ok, i understand. i drive in traffic quite a lot to and from work, do you think that fouling the plugs would be an issue with the ghost cam tune? i have the FG mkii XR6 na. cheers, Steve Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted August 2, 2018 Author Share Posted August 2, 2018 Depends how much overlap you command and how much idling you do. Just tweak it until it drives how you want. Take your laptop with you, you can always adjust it. Quote Link to comment Share on other sites More sharing options...
DarkHorse Posted August 2, 2018 Share Posted August 2, 2018 You can clean up your fueling by adjusting auF16657, Exhaust cam adder. Under speed density. 1 Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 2, 2018 Share Posted August 2, 2018 good info, thanks very much Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted August 2, 2018 Author Share Posted August 2, 2018 Yes if you do this your trims will max out at idle. Fixing the various sd maps will be required as suggested above. Quote Link to comment Share on other sites More sharing options...
Carl Posted August 3, 2018 Share Posted August 3, 2018 Mate and I giving it a go received_10215041226331801.mp4 20180803_073340.mp4 2 Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 3, 2018 Share Posted August 3, 2018 wow!!! Lol Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 4, 2018 Share Posted August 4, 2018 hi i must be missing something, probably knowledge lol i can't locate any auf**** scalars. i have searched for them but it doesn't find any of the ones mentioned what should i be doing? thx, steve Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted August 6, 2018 Author Share Posted August 6, 2018 Send us an email with your file and the specific scalars you can't find, or if you are happy to share publicly you can post it here as an attachment. Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 6, 2018 Share Posted August 6, 2018 1 hour ago, Roland@pcmtec said: Send us an email with your file and the specific scalars you can't find, or if you are happy to share publicly you can post it here as an attachment. actually it's the tables mentioned above that i can't find. Does it matter that the tune is a Herrod/Sct tune? cheers Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted August 6, 2018 Author Share Posted August 6, 2018 19 minutes ago, fordsrule said: actually it's the tables mentioned above that i can't find. Does it matter that the tune is a Herrod/Sct tune? cheers Are you using the Pro version of the software? Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 6, 2018 Share Posted August 6, 2018 1 minute ago, Roland@pcmtec said: Are you using the Pro version of the software? i'm using the workshop version sir Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted August 6, 2018 Author Share Posted August 6, 2018 Is it a BF/FG XR6 Turbo? Do you have all the view levels enabled via View -> PCM -> Workshop etc? Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 6, 2018 Share Posted August 6, 2018 1 hour ago, Roland@pcmtec said: Is it a BF/FG XR6 Turbo? Do you have all the view levels enabled via View -> PCM -> Workshop etc? it's an FG na i'll look into the Views thanks for your help Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted August 6, 2018 Author Share Posted August 6, 2018 What strategy? it may have different parameter numbers in the NA. Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 6, 2018 Share Posted August 6, 2018 23 minutes ago, Roland@pcmtec said: What strategy? it may have different parameter numbers in the NA. this is a shot of the screen, the strategy name isn't right? Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 6, 2018 Share Posted August 6, 2018 3 minutes ago, fordsrule said: this is a shot of the screen, the strategy name isn't right? ok, it looks like there might have been a setting in the Views list that was stopping it, i can find the tables now thankyou so much Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted August 8, 2018 Share Posted August 8, 2018 On 8/3/2018 at 10:14 AM, Carl said: Mate and I giving it a go received_10215041226331801.mp4 20180803_073340.mp4 what overlap did you have on the top video? sounds so good Quote Link to comment Share on other sites More sharing options...
Carl Posted August 8, 2018 Share Posted August 8, 2018 We where playing around. I think it was about 30 to 35. Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted August 22, 2018 Share Posted August 22, 2018 Was mucking around with these settings, seems to give some lump but then it smoothes out, then comes back, then smoothes out etc. Is there other tables that should be fine tuned also? Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 25, 2018 Share Posted August 25, 2018 On 8/6/2018 at 5:19 PM, fordsrule said: ok, it looks like there might have been a setting in the Views list that was stopping it, i can find the tables now thankyou so much Hi, the image below is from my tune, as you can see it differs from the example you posted in your guide. My query is which line do I change to match your example as I have more lines? Thanks, Steve Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted August 25, 2018 Author Share Posted August 25, 2018 On 8/6/2018 at 4:49 PM, fordsrule said: this is a shot of the screen, the strategy name isn't right? That is because your car has been previously tuned with SCT. Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 25, 2018 Share Posted August 25, 2018 6 minutes ago, Roland@pcmtec said: That is because your car has been previously tuned with SCT. That would be right, but can you help me with which lines do I change? Your example says the last two, but mine are different thanks Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted August 25, 2018 Author Share Posted August 25, 2018 You can do whatever you want there. Experiment and see what works best. Quote Link to comment Share on other sites More sharing options...
fordsrule Posted August 25, 2018 Share Posted August 25, 2018 9 minutes ago, Roland@pcmtec said: You can do whatever you want there. Experiment and see what works best. Oh, ok lol. I'll give it a go then Quote Link to comment Share on other sites More sharing options...
Loki Posted August 30, 2018 Share Posted August 30, 2018 On 8/25/2018 at 5:49 PM, Roland@pcmtec said: You can do whatever you want there. Experiment and see what works best. I have no idea what to do with that table as mine had been tuned with SCT. It has more rows than what you showed from your BF table. Can you give me a little more details please? Just want a little "tiny" rattle from ghost cam ? Very tiny bit Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted August 30, 2018 Author Share Posted August 30, 2018 It is the TPS vs cam angle. So it depends what TPS angle you are seeing at idle as to what you need. Eg if you set the low TPS cells to a high overlap but when you flick he AC on it the TPS increases it will drop you out of that cell. So you need to experiment and see. Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted November 5, 2018 Share Posted November 5, 2018 Just touching base on this, has anyone fine tuned their ghost cam settings and willing to show what they have found works best for drivability too? Mine tends to want to drop idle rpm too much coming back into the overlap cells, even with idle speed set higher Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted November 5, 2018 Author Share Posted November 5, 2018 What fuel trims are you getting at idle? Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted November 5, 2018 Share Posted November 5, 2018 I will double check in the morning. Even with 35deg overlap, i barely get much lump, would running e85 have an effect on this? The effects were a lot more noticable on 98, on e85, same settings seems to just "stumble" rather than have a lump. Maybe the fuel trims are off Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted November 5, 2018 Share Posted November 5, 2018 So i checked stft and they were at 1% with the stock overlap adder for fuel. Changed to the settings in the 1st post and its still at 1% but sounds better. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted November 5, 2018 Author Share Posted November 5, 2018 What about LTFT they are the ones you care about. Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted November 6, 2018 Share Posted November 6, 2018 (edited) With stock cam adder values, around -10. Lowering the numbers for 35 and 60 degree overlap brings it down to about 8, but cant lower it further, and thats lowering them from 1 to 0.5 Edited November 6, 2018 by richardpalinkas Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted November 6, 2018 Share Posted November 6, 2018 So adjusting auf16657 in the 30 degree, 550rpm to 1000rpm, should these values be increased or decreased to make it leaner? Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted November 6, 2018 Author Share Posted November 6, 2018 Decreased. 1 Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted November 6, 2018 Share Posted November 6, 2018 On 7/31/2018 at 2:23 PM, Roland@pcmtec said: Now in idle mode the camshaft overlap is capped by the same table that determines the intake camshaft position, so you cannot achieve any overlap, the best you can do is set both the intake and exhaust camshaft to 50 degrees which will give you some lump. What tables/ scalers need to be changed to achieve this method? Quote Link to comment Share on other sites More sharing options...
fordsrule Posted November 24, 2018 Share Posted November 24, 2018 Well finally got around to flashing the ghost tune, didn't blow anything up so that"s good lol 20181104_113402.mp4 Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted November 25, 2018 Share Posted November 25, 2018 Got all the fueling sorted. Sounds good in park/ neutral but driving still has the issue of overshooting below idle rpm, sometimes stalling. Ive tried gradually reducing the cam angle so its not as sudden, which doesnt make too much difference. Is there more parameters that nees to be adjusted such as idle airflow or spark timing at idle to help it not overshoot? Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted November 25, 2018 Author Share Posted November 25, 2018 13 minutes ago, richardpalinkas said: Got all the fueling sorted. Sounds good in park/ neutral but driving still has the issue of overshooting below idle rpm, sometimes stalling. Ive tried gradually reducing the cam angle so its not as sudden, which doesnt make too much difference. Is there more parameters that nees to be adjusted such as idle airflow or spark timing at idle to help it not overshoot? Definitely recommend setting the idle rpm higher and also more airflow at idle. If you raise the airflow to get the idle timing lower (eg 5 degrees ish) then you have more timing reserve to catch the fall. If you are already idling at 20 degrees the PCM can't respond quick enough to catch it. Timing cause the idle to jump almost immediately, more idle air has a small lag delay and can oscillate. I also recommend leaving the oil temp table fairly standard, that way when the car is cold it won't have the lumpy idle. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted November 25, 2018 Author Share Posted November 25, 2018 On 11/25/2018 at 7:44 AM, fordsrule said: Well finally got around to flashing the ghost tune, didn't blow anything up so that"s good lol Sounds like it is misfiring. How much overlap is that? Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted November 26, 2018 Share Posted November 26, 2018 Best to adjust auf0032 for idle airflow? As a ballpark, how much should these values be increased by? Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted November 26, 2018 Author Share Posted November 26, 2018 It is dependent on too many things. Start small and experiment. Quote Link to comment Share on other sites More sharing options...
fordsrule Posted November 26, 2018 Share Posted November 26, 2018 1 hour ago, Roland@pcmtec said: Sounds like it is misfiring. How much overlap is that? As per auF2260, but i have read it again and you say to reduce the values there so there is no misfire, i will have to make that adjustment. But the idle did change to more of a lump just after the end of that video Cheers Quote Link to comment Share on other sites More sharing options...
richardpalinkas Posted December 1, 2018 Share Posted December 1, 2018 Some testing for some ear candy. 45deg overlap sounds mint, but still cannot get the revs to drop nicely when coming to a stop in drive GOPR0153_1543638459562_high_1.mp4 Quote Link to comment Share on other sites More sharing options...
ebbarra Posted December 2, 2018 Share Posted December 2, 2018 Mine worked 6AC88E0C-E3AD-40AF-BE49-80B65052EB14.MOV Quote Link to comment Share on other sites More sharing options...
abs351 Posted December 16, 2018 Share Posted December 16, 2018 Hi Team, New member to PCMTECH & tuning of such ECU's. I took the time to read through the ghost cam scenrio, got to work, great..after the 1st run got over it, sounds good though..lol...one thing i didnt find as a scalar is auF2260 i dont seem to find this. Car is a 2013 FG XR6 MK2 turbo following strategy HAEK4MF.HEX / BBMF Is this missing on such stargey? running PCMtech version 0.74. regards Abs FG-MK2-XR6-TRBO-GhostCam&Overboost-16-12-18.tec Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted December 16, 2018 Author Share Posted December 16, 2018 You need professional or workshop to see the cam overlap adders (auF2260). You can upgrade to professional for the difference in price (there is a product you can purchase online for the upgrade). Quote Link to comment Share on other sites More sharing options...
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