rokkie Member 87 Member For: 12y 8m 14d Gender: Male Location: Adelaide, SA Posted 24/04/15 09:59 AM Share Posted 24/04/15 09:59 AM Hi all, as above I'm curious what you all think. Its tuned to 14psi @ 302rwkw. When I give it a boot full I notice the boost pressure go strong and hold 14psi then drops to 9psi and back up to 14psi a few times.I have traction on but no traction light comes on when it happens. Its only started the last month that im aware of.Mods are fairly standard for a BA xr6t- 4 inch dump to twin 2.5- bosch 1000cc injectors- walbro 255 lph- plaz valve springs- sct tune (xcal 4)- pwr intercooler with stock plumbingHave not done the flapper mod as the tuner never mentioned it. So under the impression boost was controllable during tune. The dyno print out for boost was smooth with no spikes. Link to comment https://www.fordxr6turbo.com/forum/topic/90426-boost-pressure-fluctuations/ Share on other sites More sharing options...
Bizkets is Drunk? Too heavy needs boost Member 5,929 Member For: 11y 9m 28d Gender: Male Location: Adelaide Posted 24/04/15 10:47 AM Share Posted 24/04/15 10:47 AM Actuator maybe? Link to comment https://www.fordxr6turbo.com/forum/topic/90426-boost-pressure-fluctuations/#findComment-1541438 Share on other sites More sharing options...
rokkie Member 87 Member For: 12y 8m 14d Gender: Male Location: Adelaide, SA Posted 24/04/15 12:59 PM Author Share Posted 24/04/15 12:59 PM Holds pressure with compressed air, thought it might be the waste gate solenoid so replaced that too Link to comment https://www.fordxr6turbo.com/forum/topic/90426-boost-pressure-fluctuations/#findComment-1541467 Share on other sites More sharing options...
BenDoCo I'm getten too old for this s**t Bronze Donating Members 4,509 Member For: 12y 1m 27d Gender: Male Location: A big bridge over a river in South Australia Posted 24/04/15 01:23 PM Share Posted 24/04/15 01:23 PM You have a 4" dump and the tuna didn't recommend a port/flapper job.....Get that done and a re-tune and you should be sweet 2 Link to comment https://www.fordxr6turbo.com/forum/topic/90426-boost-pressure-fluctuations/#findComment-1541472 Share on other sites More sharing options...
rokkie Member 87 Member For: 12y 8m 14d Gender: Male Location: Adelaide, SA Posted 24/04/15 11:49 PM Author Share Posted 24/04/15 11:49 PM Thanks will look into that. What about the actuator? Aftermarket? And what brand as I've seen a few post about the turbosmart and not sure Link to comment https://www.fordxr6turbo.com/forum/topic/90426-boost-pressure-fluctuations/#findComment-1541506 Share on other sites More sharing options...
pj4000 New Member 23 Member For: 10y 5m 15d Gender: Male Location: Central Coast NSW Posted 10/05/15 10:24 AM Share Posted 10/05/15 10:24 AM How'd you get on with this mate? Did u end up doing the flapper mod and new actuator. Link to comment https://www.fordxr6turbo.com/forum/topic/90426-boost-pressure-fluctuations/#findComment-1543911 Share on other sites More sharing options...
rokkie Member 87 Member For: 12y 8m 14d Gender: Male Location: Adelaide, SA Posted 10/05/15 10:31 AM Author Share Posted 10/05/15 10:31 AM Not yet as it seems to have corrected itself the last couple of weeks. Holds 14psi all the way untill I lift the foot. Very strange!Only change is 4 new tyres but when I was having the issue it didnt matter with traction on or off. Nice being able to smash the pedal and feel traction. 1 Link to comment https://www.fordxr6turbo.com/forum/topic/90426-boost-pressure-fluctuations/#findComment-1543912 Share on other sites More sharing options...
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