simmo Member 431 Member For: 21y 10m 16d Gender: Male Location: byron bay more underarm hair per square km Posted 29/08/09 09:02 PM Share Posted 29/08/09 09:02 PM (edited) my car was going good after running 10 psi edit ,as somepeople know it all of a sudden lost boostnow my car is at a workshop and they found a split vaccum line near the turbo,it was repaired and dynoed I then get a call saying the car made well over 300 rwkw on the dyno spiking at 20 psi then dropping to 16psi but it obviously was leaning out.could this mean that it was tuned with a problem with the vaccum line to 10 psi and now repaired its boosting its ass off??........ps im in no way blaming the tuner for this btw. Edited 29/08/09 09:04 PM by simmo Link to comment Share on other sites More sharing options...
The_Bogan Donating Members 881 Member For: 17y 8m 22d Gender: Male Location: Brisbane, Queensland Posted 29/08/09 11:51 PM Share Posted 29/08/09 11:51 PM what type of exhaust have you got? Link to comment Share on other sites More sharing options...
simmo Member 431 Member For: 21y 10m 16d Gender: Male Location: byron bay more underarm hair per square km Posted 30/08/09 12:49 AM Author Share Posted 30/08/09 12:49 AM standard with gutted cat but ive go a dump and high flow at ordered Link to comment Share on other sites More sharing options...
bertis Member 30 Member For: 15y 4m 19d Posted 02/09/09 03:10 AM Share Posted 02/09/09 03:10 AM That cant be good at all.... How could you not blame the tuner...... Link to comment Share on other sites More sharing options...
ETM Member 1,194 Member For: 17y 9m 12d Gender: Male Location: syd south Posted 02/09/09 03:59 AM Share Posted 02/09/09 03:59 AM Nothing here makes any sense. A split vacuum boost line to the wastegate will cause OVERBOOST and when fixed it will return to normal boost pressure. A split boost line cannot cause the complete loss of boost that you were describing, nor can it increase boost pressure when fixed. Either you have your wires crossed or you are being fed a load of crap. Link to comment Share on other sites More sharing options...
BAD APPLE New Member 9 Member For: 16y 2m 10d Posted 03/09/09 05:52 AM Share Posted 03/09/09 05:52 AM If the cat has been guttered then the absolute lowest boost pressure will be 13psi with no other mods done, even if your tuner tries to lower the boost with a flash it simply wont work. The lose of boost sound like when the hose joining the turbo to the under battery pipe comes off. Link to comment Share on other sites More sharing options...
MiKa Donating Members 4,243 Member For: 18y 4m 5d Gender: Male Location: Melbourne, VIC Posted 03/09/09 06:32 AM Share Posted 03/09/09 06:32 AM Maybe he meant just a split hose?? A split hot side pipe or the air box to turbo pipe, would cause you to loose boost pressure and if it was tuned that way then fixing the problem would result in obviously more boost than wanted.. Same thing happend to me, my car was tuned with a pipe not secured enough and as the days went on it finally popped off. I reconnected the pipe and it was boosting to about 21psi.. Got a re-tune asap back to around 14psi...In my case I didnt blame the tuner cause these things happen, at the time everything seemed fine, so... sh*t happens IMO Link to comment Share on other sites More sharing options...
simmo Member 431 Member For: 21y 10m 16d Gender: Male Location: byron bay more underarm hair per square km Posted 03/09/09 10:04 AM Author Share Posted 03/09/09 10:04 AM na the guy said it was a split hose on the factory boost controller I cant see how it now spikes at 20 psi and drops to 15psi im not driving it on that tune its going back to factory tune untill I go back to my regular tuner and get a retune..........get this apparently it made 360+ at the wheels I think his dyno is out to say the least I dunno now im even more confused Link to comment Share on other sites More sharing options...
simmo Member 431 Member For: 21y 10m 16d Gender: Male Location: byron bay more underarm hair per square km Posted 03/09/09 10:08 AM Author Share Posted 03/09/09 10:08 AM (edited) 13.8 is not a safe afr reading am I correct ? whats considered safe? Edited 03/09/09 10:08 AM by simmo Link to comment Share on other sites More sharing options...
timlavxr6t Member 7 Member For: 15y 4m 7d Gender: Male Location: Brisbane Posted 03/09/09 10:47 AM Share Posted 03/09/09 10:47 AM 13.8 is not a safe afr reading am I correct ? whats considered safe?13.8 is rich that's ok 14.7 is where you want it to be anything above that is lean. 14.7 = how many parts air to 1 = unit of fuel Link to comment Share on other sites More sharing options...
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