workxr6 Member 28 Member For: 15y 9m 25d Gender: Male Location: Brisbane Southside Posted 30/07/09 12:40 PM Share Posted 30/07/09 12:40 PM I have a problem with not being able to get the boost up higher. Thought some one could shed some new thoughts.To begin, I have just done the turbo up myself. Ported the hole, fitted a 35mm flap (cause it fits onto the original seat ) and a 12psi actuator (genuine garrett) and ported the housing for smoother airflow. No other changes were made at the same time. Before, the boost hit 15psi by 4500 odd rpm and crept up to 17psi before I woosed out and let off. After turbo mod, it would get to 10psi then fall back to 8psi. I tensioned the actuator another turn and now it goes to 11psi then falls back to around 9psi.The boost rises quickly to 11psi like it should and the motor pulls through the rev range good. I have put tunes in commanding a wastegate duty cycle of 0.1 and another tune with 1 and it makes no difference. The flap opens and closes sweet with compressed air and the actuator now has close to 5-6mm of preload.?????????? Anybody help here, please! Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/ Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 10m 23d Gender: Male Location: @ my laptop Posted 30/07/09 09:39 PM Share Posted 30/07/09 09:39 PM I doubt you are going to get enough control with just the hand unit, you will need a custom tune to get the boost correct and then you can make small changes with the hand unit.Assuming you have no boost leaks anywhere, your port is allowing more exhaust flow through it when it is commanded to be open which is why your boost level is now lower Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/#findComment-914585 Share on other sites More sharing options...
workxr6 Member 28 Member For: 15y 9m 25d Gender: Male Location: Brisbane Southside Posted 31/07/09 12:57 AM Author Share Posted 31/07/09 12:57 AM I'm not quite sure of the "hand unit" you are referring to. I am using a Sniper box with the Commando software. It has all the functionality to do a full custom tune.I realise the porting is now bypassing more exhaust gas. The problem is I cant get boost above 11psi.I have programmed the wastegate duty cycle to be fully closed and fully open, and it doesn't make any difference. Unless there are other fields in programming that I am missing.Cheers. Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/#findComment-914632 Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 10m 23d Gender: Male Location: @ my laptop Posted 31/07/09 01:47 AM Share Posted 31/07/09 01:47 AM Sorry mate, I know I shouldn't assume, but I assumed you must have been trying to control boost with a flash 2 or 3 .Not familiar with the sniper, but possibly the turbo control is still in closed loop which is why your adjustments may not be working.Is the flapper closing all the way, I have seen some port jobs (including some that are posted on this forum) that the flapper can catch and then not close all the way intermittantly, which then stops boost building as it should. Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/#findComment-914637 Share on other sites More sharing options...
workxr6 Member 28 Member For: 15y 9m 25d Gender: Male Location: Brisbane Southside Posted 31/07/09 09:45 AM Author Share Posted 31/07/09 09:45 AM I think its solved. Yes, the flapper is closing all the way (at least when its all cold anyway). I had the ute on the hoist with dump pipe off and my noggin jammed up beside the gearbox.You are right about the closed loop part. I found out that the "Base desired boost pressure" is in "In Hg" not psi. I changed that and it went up a bit but also went harder. Increased the wastegate duty cycle a bit more and boost went up a bit more then settled on 12.I am confident its all good. Thanks for your help Ratter. Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/#findComment-914872 Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 10m 23d Gender: Male Location: @ my laptop Posted 31/07/09 12:28 PM Share Posted 31/07/09 12:28 PM No problem, hope you get it sorted 100% Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/#findComment-914961 Share on other sites More sharing options...
sct911 Member 848 Member For: 12y 5m 13d Gender: Male Posted 03/04/14 10:45 AM Share Posted 03/04/14 10:45 AM On 31/07/2009 at 1:47 AM, ratter said: Is the flapper closing all the way, I have seen some port jobs (including some that are posted on this forum) that the flapper can catch and then not close all the way intermittantly, which then stops boost building as it should.can this be checked with only the dump pipe off or does the entire rear housing have to come off? Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/#findComment-1463344 Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 10m 23d Gender: Male Location: @ my laptop Posted 03/04/14 11:00 AM Share Posted 03/04/14 11:00 AM it can be checked if jammed, just by looking at the arm with a mirror if you know where it should sit, to check whether it catches intermittently then the dump may need to be removed Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/#findComment-1463348 Share on other sites More sharing options...
sct911 Member 848 Member For: 12y 5m 13d Gender: Male Posted 03/04/14 11:06 AM Share Posted 03/04/14 11:06 AM cheers mate, just need to check if it catches intermittently. Would intermittently catching also cause lack of response down low? a post I found(below) kind of defines sometimes what my car feels likePosted 03 December 2006 - 12:24 PMAdam, on Dec 3 2006, 10:11 AM, said: Adam said: Jason, didn't you do some tests on your actuator to see if it was working properly?Yes, although mine was more lack of minimum boost and exhaust related issues. However, I recently did some troubleshooting on another T with boost issues. The problem with that car was the lack of response under 3500rpm but no issues with peak power. You could see on the dyno graph exactly when the power shot up.As it turned out, the car had a 8psi actuator installed but there wasn't enough preload on the wastegate swingvalve assembly. What that did was allow the swing valve to remain partially open causing the exhaust gases to bleed-off through the wastegate port, starving the turbine wheel of the gass it needs to spin. Hence the lack of response down low. Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/#findComment-1463353 Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 10m 23d Gender: Male Location: @ my laptop Posted 03/04/14 12:35 PM Share Posted 03/04/14 12:35 PM yes, if it is being held open it will be laggy Link to comment https://www.fordxr6turbo.com/forum/topic/60172-cant-get-it-up-boost-that-is/#findComment-1463377 Share on other sites More sharing options...
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