Boost Fluctuations on Data Logger - Printable Version +- Welcome to The Australian Hayabusa Club Forum - ARCHIVE ONLY VERSION - NEW REGISTRATIONS & POSTS DISABLED (https://www.australian-hayabusa-club.com/MyBB) +-- Forum: Bike Discussions (https://www.australian-hayabusa-club.com/MyBB/forumdisplay.php?fid=35) +--- Forum: Turbo Talk (https://www.australian-hayabusa-club.com/MyBB/forumdisplay.php?fid=41) +--- Thread: Boost Fluctuations on Data Logger (/showthread.php?tid=11804) |
Boost Fluctuations on Data Logger - horndog - 12-03-2009 I am getting a fluctuation of boost on my data log for wide open throttle. I have read on some forums that it is normal and you can smooth it simply by putting a restrictor on the MAP sensor for those engines that run timing referenced with boost. I just wanted to ask if others have experienced this and is it normal or can there be an identified issue causing it? Turbo Gurus? Time Boost RPM 32.200 1.2 5590 32.300 2.8 6010 32.400 3.6 6085 32.500 4.3 6330 32.600 3.2 6475 32.700 3.6 6823 32.800 5.0 7133 32.900 4.1 6926 33.000 3.7 5516 33.100 4.8 3892 33.200 3.4 3502 33.300 3.6 3522 33.400 2.5 3810 33.500 1.7 4044 33.600 1.9 4292 33.700 2.8 4538 33.800 1.9 4822 33.900 1.7 5054 34.000 2.1 5331 34.100 3.7 5583 34.200 2.3 5858 34.300 2.6 6136 34.400 2.8 6427 34.500 4.3 6730 34.600 3.0 7046 34.700 3.7 7349 34.800 4.8 7693 34.900 4.5 8005 35.000 4.7 8343 35.100 4.7 8678 35.200 4.1 9000 35.300 6.1 9278 35.400 6.1 9593 35.500 5.2 9860 35.600 5.6 10127 35.700 1.7 8539 35.800 2.5 8393 35.900 3.6 7801 36.000 3.2 7972 36.100 3.6 8170 36.200 4.8 8348 36.300 3.7 8491 36.400 4.8 8656 36.500 4.3 8811 36.600 4.5 8965 36.700 4.3 9101 36.800 4.5 9278 36.900 5.2 9423 37.000 5.4 9567 37.100 5.6 9735 37.200 5.2 9881 37.300 5.8 10068 37.400 5.8 10187 37.500 6.9 10332 37.600 6.9 10489 37.700 6.3 10618 37.800 6.7 10783 37.900 6.5 10911 38.000 7.4 11050 38.100 6.3 10980 38.200 5.9 11104 38.300 2.5 8229 38.400 1.9 9462 38.500 3.7 8873 38.600 3.0 8913 38.700 3.4 8994 38.800 5.0 9089 38.900 5.4 9149 39.000 4.5 9228 39.100 4.5 9297 39.200 5.8 9372 39.300 4.7 9462 39.400 5.8 9540 39.500 5.2 9607 39.600 5.0 9681 39.700 6.9 9749 39.800 5.2 9811 39.900 5.2 9903 40.000 5.9 9981 40.100 6.5 9832 40.200 3.6 9560 RE: Boost Fluctuations on Data Logger - Matturbo - 12-03-2009 Mine does that too, jumps 2 PSI in .1s usually sits around 8PSI with a 7 PSI spring. Not sure of cause. RE: Boost Fluctuations on Data Logger - spamanglenn - 13-03-2009 8psi and 149mph?? what going on there? is it decompressed or something. RE: Boost Fluctuations on Data Logger - GRUNTMAX - 14-03-2009 Not an expert on this, but maybe you need an AMS1000 boost controller from NLR USA, and LP air loading your wastegate instead of boost pressure. (a small electric air compressor that cuts in at 90psi & shuts down at 120 psi loadind a small volume tank such as the ones built into a bigccracing swingarm and loading your wastegate.) While your at it, you may as well install a watermist injection system so you can increase your boost pressure. RE: Boost Fluctuations on Data Logger - horndog - 14-03-2009 I think I may have found a contributing factor to my issue, I was getting some exhaust gas bypassing around the turbine through the wastegate port. I have fixed it up now and the turbo sounds like it is spooling better already just from free revving. Some comments from the guys on the U.S forums suggest it should be making full boost quicker so hopefully this will help. Next time out for some laps will tell if it has made a difference. |