what causes boost creeping? im boosting my 7afte at 8psi but when i reach around 5000rpm the boost presure drops to 5 psi. what size exhaust pipe do you use in a 7afte?
boost creep - 6G Celicas Forums
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i just got my 2 1/2 in done and it gets me to 8.5 psi at 5900 rpm
QUOTE(akiyama @ Apr 30, 2006 - 11:05 PM) [snapback]428433[/snapback]
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what causes boost creeping? im boosting my 7afte at 8psi but when i reach around 5000rpm the boost presure drops to 5 psi. what size exhaust pipe do you use in a 7afte?
what causes boost creeping? im boosting my 7afte at 8psi but when i reach around 5000rpm the boost presure drops to 5 psi. what size exhaust pipe do you use in a 7afte?
i just got my 2 1/2 in done and it gets me to 8.5 psi at 5900 rpm
your not refering to the right thing here....
boost CREEP is when for example say your setting is 8psi but you keep boosting and reach 10psi...thats creep
wat you are experiencing is boost DROP...
this is attributed to 3 things i would say
1)your exhaust is too small...
2)your turbo is too small.....your turbo basically doesn't have the efficiency to run at that high of an RPM for the CFM moving and drops
3)your motor doesn't move enough air to keep the turbo spooling fast enough to build that amount of pressure...
exhaust size on a 7afte should be 2.5"
boost CREEP is when for example say your setting is 8psi but you keep boosting and reach 10psi...thats creep
wat you are experiencing is boost DROP...
this is attributed to 3 things i would say
1)your exhaust is too small...
2)your turbo is too small.....your turbo basically doesn't have the efficiency to run at that high of an RPM for the CFM moving and drops
3)your motor doesn't move enough air to keep the turbo spooling fast enough to build that amount of pressure...
exhaust size on a 7afte should be 2.5"
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i just had my car on a dyno and it was at 12-13ish psi and kept droping off to 10psi in the upper rpms.... explain that!
QUOTE(playr158 @ May 1, 2006 - 8:20 PM) [snapback]428777[/snapback]
>
your not refering to the right thing here....
boost CREEP is when for example say your setting is 8psi but you keep boosting and reach 10psi...thats creep
wat you are experiencing is boost DROP...
this is attributed to 3 things i would say
1)your exhaust is too small...
2)your turbo is too small.....your turbo basically doesn't have the efficiency to run at that high of an RPM for the CFM moving and drops
3)your motor doesn't move enough air to keep the turbo spooling fast enough to build that amount of pressure...
exhaust size on a 7afte should be 2.5"
your not refering to the right thing here....
boost CREEP is when for example say your setting is 8psi but you keep boosting and reach 10psi...thats creep
wat you are experiencing is boost DROP...
this is attributed to 3 things i would say
1)your exhaust is too small...
2)your turbo is too small.....your turbo basically doesn't have the efficiency to run at that high of an RPM for the CFM moving and drops
3)your motor doesn't move enough air to keep the turbo spooling fast enough to build that amount of pressure...
exhaust size on a 7afte should be 2.5"
i just had my car on a dyno and it was at 12-13ish psi and kept droping off to 10psi in the upper rpms.... explain that!
15PSI - 30MPG - Megasquirt Tuned
not enough down force, lagos. need a bigger wing. 
lol im jp.
lol im jp.
the 1/4 doesnt have patience for a ST.... so we make them ST-T's so atleast we'll sound good going slow.