F6Fury Member 135 Member For: 12y 28d Posted 06/08/13 08:11 AM Share Posted 06/08/13 08:11 AM Hey guys has any actually checked for boost pressure spikes between gear changes on the fg zf,mine seems to spike up to 4psi,and yes I have the bigger flapper valve and stock dump Link to comment Share on other sites More sharing options...
boost69 Donating Members 737 Member For: 19y 7m 5d Posted 06/08/13 08:16 AM Share Posted 06/08/13 08:16 AM I haven't checked on my FG, but on my BF I have a boost gauge and that spikes on every gear change...normal apparently. Link to comment Share on other sites More sharing options...
Bonjaz Donating Members 1,841 Member For: 16y 16d Gender: Male Location: CQ Posted 06/08/13 08:18 AM Share Posted 06/08/13 08:18 AM Yea normal mate, you will never totally get rid of spikes between gears 1 Link to comment Share on other sites More sharing options...
F6Fury Member 135 Member For: 12y 28d Posted 06/08/13 08:26 AM Author Share Posted 06/08/13 08:26 AM I haven't checked on my FG, but on my BF I have a boost gauge and that spikes on every gear change...normal apparently. hey bro how much spike are you seeing? Link to comment Share on other sites More sharing options...
boost69 Donating Members 737 Member For: 19y 7m 5d Posted 06/08/13 10:50 AM Share Posted 06/08/13 10:50 AM On the BF which runs around 5 psi peak...I have seen it spike to about 8psi on the gear changes from memory... Link to comment Share on other sites More sharing options...
Kosij Donating Members 2,045 Member For: 13y 4m 13d Gender: Male Posted 06/08/13 11:00 AM Share Posted 06/08/13 11:00 AM I have seen my brothers Zf spike to about 18psi! Cars tuned to 15psi. Link to comment Share on other sites More sharing options...
F6Fury Member 135 Member For: 12y 28d Posted 06/08/13 11:18 AM Author Share Posted 06/08/13 11:18 AM Mines jumping around 5psi over Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 29d Gender: Male Location: Probably above atmospheric pressure Posted 06/08/13 01:20 PM Share Posted 06/08/13 01:20 PM Funnily enough I re-posted this exact picture only last night of my car when it was stock (BFII XR6T). Link to comment Share on other sites More sharing options...
wa g6et Member 657 Member For: 13y 6m 21d Gender: Male Location: Perth NOR Posted 06/08/13 02:42 PM Share Posted 06/08/13 02:42 PM When mine spikes on shifts the Nizpro Overboost Valve I have fitted should jump in. I have it set to 2psi above my tune. Link to comment Share on other sites More sharing options...
Headsex Donating Members 2,528 Member For: 19y 4m 13d Gender: Male Location: Melb Posted 13/08/13 02:44 AM Share Posted 13/08/13 02:44 AM The boost level jumps on ALL autos, 4speed or 6 speed.If its tuned in closed loop, the PCM will command 0duty as it exceeds the overboost limit, but even this is not enough to stop the spike.Seeing as though you have enough time to look at the boost gauge whilst driving hard, I suggest you go out and get more mods/power to distract you from the boost gauge 5 Link to comment Share on other sites More sharing options...
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