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Author Topic: Boost loss when quick gear change  (Read 2394 times)

Offline Ajh_91

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Boost loss when quick gear change
« on: 26 June 2012, 09:25 »
Hi guys, right ive got this problem thats baffling me.. My car has been remapped to 185bhp.
It boost to 20psi, when i quick gear change it will only boost to 10 psi.. Yet if i take foot fully off throttle for 1 second and back on it will hit full boost without fail and hold there ?!?
If anyone one has any ideas it would be a great help, cheers
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Offline DunnDeal12

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Re: Boost loss when quick gear change
« Reply #1 on: 26 June 2012, 10:57 »
if thats baffling you then your baffling me :huh:
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Offline Xtrhardcore

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Re: Boost loss when quick gear change
« Reply #2 on: 26 June 2012, 16:36 »
Checked your Actuator?
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Offline Ajh_91

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Re: Boost loss when quick gear change
« Reply #3 on: 26 June 2012, 16:59 »
I havent .. How do i go about checking it ?  Like what do i have to look out for ?
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Offline Ajh_91

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Re: Boost loss when quick gear change
« Reply #4 on: 26 June 2012, 18:18 »
Thing is if i slow gear change or known as "granny shifting" it will boost up perfectly all the time every time, so as quick gear change im likly to see only 10 psi surly if it was the actuator it would do 10psi all the time ?
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Offline cooki2

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Re: Boost loss when quick gear change
« Reply #5 on: 26 June 2012, 20:44 »
Surley there is no need to change gear really quick though? Y not just change gear like a normal person then u won't have the problem?
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Offline Ajh_91

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Re: Boost loss when quick gear change
« Reply #6 on: 26 June 2012, 21:18 »
Because for me to shift and maintain the 20 psi boost to next gear, my revs drop 2000 rpm... That isnt a normal gear change.. Hence the term "granny shift".. So any ideas guys ?
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Offline Wazzzer

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Re: Boost loss when quick gear change
« Reply #7 on: 26 June 2012, 21:25 »
you will never maintain positive pressure when you change gear, it will always drop (unless you have anti lag)
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Offline mcgee9t2

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Re: Boost loss when quick gear change
« Reply #8 on: 26 June 2012, 22:13 »
only way to keep boost up is to install an antilag system

edit. didnt read any of the replys, already beeten to the answer by was
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Offline Ajh_91

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Re: Boost loss when quick gear change
« Reply #9 on: 26 June 2012, 22:54 »
Okie..  Im is secong gear accelarating (boost gauge is showing 20psi peak, holding 18psi), shift gear to 3rd (normal speed - quick shift) in 3rd gear and it will only boost to 10psi and hold at 10psi, let throttle fully off for 1 second, full throttle again and boost straight to 20psi.

Okie..  Im is secong gear accelarating (boost gauge is showing 20psi peak, holding 18psi), shift gear to (granny shift (2-3 seconds)) in 3rd gear and it will boost straight to 20psi.

I cant put it no clearer the that, it only happens when i change gear normal speed or i change gear fast (giving the car some power down the dual carridge way)
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