2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

greddy profec b spec II settings for my car

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Old May 11, 2005 | 09:26 PM
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From: Wesley Chapel, FL
greddy profec b spec II settings for my car

im kind of confused on what my settings should be on this with my current mods. previous owner installed it but i dont think they ever tuned it cause it would boost spike like crazy. i messed around with it a bit but i dont think ive got it the best i can.
its a 91 gxl
mods:
full jdm s5 tII swap
jdm rear end w/ lsd
hks fuel cut defencer
racing beat downpipe
racing beat mid pipe
APEXi n1 dual mid pipe back exhaust
hks turbo outlet pipe
greddy type s bov
johnnyracecar fmic
walbro 255
APEXi intake kit
greddy profec b spec II
greddy turbo timer
autometer cobault boost and a/f gauge
tein s tech springs
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Old May 12, 2005 | 06:30 PM
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From: Wesley Chapel, FL
anyone?
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Old May 12, 2005 | 08:51 PM
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From: Gainesville, FL
how much boost you wanting to run? every car is going to be different.

ill check my setting for you tommorow though
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Old May 12, 2005 | 09:56 PM
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From: In Your Dreams
ahh, so you bought the car. i was wondering if someone off of here got it, hit me up on AIM sometime, DrRachelLesage
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Old May 12, 2005 | 11:06 PM
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From: Berthier, Quebec
before turning the boost up, you might want to get a way to manage fuel huh??

unless you want to be on the edge fo the razor on your engine's life...
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Old May 12, 2005 | 11:50 PM
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From: Arkham Asylum
There are no 'base' settings for specific mods on the spec II.
You have 3 main settings: set, gain, and start boost.

Set and start boost are you 2 most important settings.

Set is the duty cycle in % which corresponds to your desired boost pressure. Just adjust the duty cycle until you are at the boost pressure you want.

Start boost is basically your boost response. The closer you set it to your desired boost pressure, the longer the wastegate will stay closed, and the quicker you will build boost. But, if your Start Boost is too high, you will spike.

Gain controls how quickly your wastegate responds. Having the gain too high will also create a boost spike
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Old May 13, 2005 | 05:18 AM
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From: Wesley Chapel, FL
Originally Posted by gergrx7
how much boost you wanting to run? every car is going to be different.

ill check my setting for you tommorow though
10lbs, is that too much with out running some fuel mods or ignition stuff? im new to turbos so sorry for the noob questions i tried searching for profec b settings and got very lost and confused.


Originally Posted by eViLRotor
There are no 'base' settings for specific mods on the spec II.
You have 3 main settings: set, gain, and start boost.

Set and start boost are you 2 most important settings.

Set is the duty cycle in % which corresponds to your desired boost pressure. Just adjust the duty cycle until you are at the boost pressure you want.

Start boost is basically your boost response. The closer you set it to your desired boost pressure, the longer the wastegate will stay closed, and the quicker you will build boost. But, if your Start Boost is too high, you will spike.

Gain controls how quickly your wastegate responds. Having the gain too high will also create a boost spike
thank you for the info

Originally Posted by Green_Streak
ahh, so you bought the car. i was wondering if someone off of here got it, hit me up on AIM sometime, DrRachelLesage
will do
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