Ralph Wiggum Moar Powar Babeh Lifetime Members 19,332 Member For: 19y 8m 25d Gender: Male Location: Perth Posted 03/04/11 10:32 AM Share Posted 03/04/11 10:32 AM a HDI cooler, 580 x 220 x 100...boost definately seems to start to fade when the motor is hot...I pressure tested my intercooler piping on the weekend, and found no leaks!so if my turbo is pushing constant pressure, and I have no leaks in my pipework, im thinking that I might have a leak in the intake manifold somewhere that gets worse after it gets hot...Boost will drop off when hot as will timing. The cars are tuned this way too reduce stress on the motor Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094182 Share on other sites More sharing options...
FORDPSI Member 40 Member For: 14y 8m 1d Posted 03/04/11 11:29 AM Share Posted 03/04/11 11:29 AM How did you measure this? Did you do the actuator line first then the manifold after that? Or did you do have two gauges and did it at once? Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094206 Share on other sites More sharing options...
FAST-XR EVIL T Member 259 Member For: 16y 6m 8d Gender: Male Location: Liverpool NSW Posted 03/04/11 10:28 PM Author Share Posted 03/04/11 10:28 PM How did you measure this? Did you do the actuator line first then the manifold after that? Or did you do have two gauges and did it at once?I measured them seperately.I moved my boost gauge from the manifold to read from the actuator lineBoost will drop off when hot as will timing. The cars are tuned this way too reduce stress on the motorhow does boost get pulled out when the actuator has constant pressure? Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094310 Share on other sites More sharing options...
spoolxr6 Member 312 Member For: 14y 7m 2d Posted 03/04/11 11:08 PM Share Posted 03/04/11 11:08 PM Where abouts on the actuator are you measuring, before the solonoid or after? Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094319 Share on other sites More sharing options...
FAST-XR EVIL T Member 259 Member For: 16y 6m 8d Gender: Male Location: Liverpool NSW Posted 03/04/11 11:21 PM Author Share Posted 03/04/11 11:21 PM Where abouts on the actuator are you measuring, before the solonoid or after?between the turbo and the solenoid... Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094325 Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,332 Member For: 19y 8m 25d Gender: Male Location: Perth Posted 03/04/11 11:31 PM Share Posted 03/04/11 11:31 PM What exhaust/cat is on the car? Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094327 Share on other sites More sharing options...
FAST-XR EVIL T Member 259 Member For: 16y 6m 8d Gender: Male Location: Liverpool NSW Posted 03/04/11 11:33 PM Author Share Posted 03/04/11 11:33 PM 100cpi 5" cat. stock exhaust with straight through 2.5" mufflers... Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094328 Share on other sites More sharing options...
spoolxr6 Member 312 Member For: 14y 7m 2d Posted 03/04/11 11:34 PM Share Posted 03/04/11 11:34 PM Look if you have no leaks in the pipes the only thing that sits in line with the pipework is the intercooler so it's the only thing that could be a restriction and from previous experience it was that for me. The drop off in boost as the revs increase also highlights the intecoolers ineffeciancy as the turbos flow/load is increased. Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094330 Share on other sites More sharing options...
spoolxr6 Member 312 Member For: 14y 7m 2d Posted 03/04/11 11:39 PM Share Posted 03/04/11 11:39 PM Think of it this way, if you had the pipe go straight from the turbo to the TB the pressure would be the same even if you had a leak on the pipe somewhere the pressure would be even accross all of it. So the only thing in its course at the moment is the cooler. Even if the BOV was leaking like EPIC mentioned the pressure on the turbo side would also be the same. So you are not chasing a leak you are looking for a restriction. Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094331 Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,332 Member For: 19y 8m 25d Gender: Male Location: Perth Posted 03/04/11 11:41 PM Share Posted 03/04/11 11:41 PM between the turbo and the solenoid...If you are measuring between the turbo and the solenoid your not getting a true picture of the boost pressure being supplied too the actuator. If the car is tuned too pull boost out up high you would see this when plumber between the solenoid and actuator.However, Spool is right, the cooler isnt flowing enough air too maintain the boost pressure. Link to comment https://www.fordxr6turbo.com/forum/topic/73860-turbo-to-manifold-pressure-drop/page/2/#findComment-1094332 Share on other sites More sharing options...
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