Boost Spiking?!!
Jul 17, 2006, 04:17 PM
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Boost Spiking?!!
hey guys
i have a IX with the following mods:
3" Cat-delete
3" Catback
and a Defi Blackface elect. boost gauge.
my boost is not stable...especialy in lower gears. it spikes to about 20.5 psi and then settles at 19 then spikes back up to 21 and goes back to ~18/19 towards the top of the rpm range.
i am just wondering if this is normal?
i am not tuned yet..i am just waiting for the rest of my mods to get it so that i could get a custom tune towards the end of the month
i am running 98 octane fuel and the car is running smoother than stock..
thanks in advance for the input
Respect
Moose
i have a IX with the following mods:
3" Cat-delete
3" Catback
and a Defi Blackface elect. boost gauge.
my boost is not stable...especialy in lower gears. it spikes to about 20.5 psi and then settles at 19 then spikes back up to 21 and goes back to ~18/19 towards the top of the rpm range.
i am just wondering if this is normal?
i am not tuned yet..i am just waiting for the rest of my mods to get it so that i could get a custom tune towards the end of the month
i am running 98 octane fuel and the car is running smoother than stock..
thanks in advance for the input
Respect
Moose
Jul 17, 2006, 04:44 PM
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Originally Posted by Mulholland0132
Not sure but...you are going to love your car with mods once your tuned. The sooner the better. 
thanks anyways...
anymore takers?
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Jul 17, 2006, 04:54 PM
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Are you keeping your foot on the pedal? Or are you running over small bumps and will bounce your foot off the pedal? My first mod was a Defi Elec Boost Gauge, second was a test pipe and downpipe. Boost was fine and didn't do anything weird like how yours is doing.
Jul 17, 2006, 04:55 PM
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Originally Posted by EvoRicer
Are you keeping your foot on the pedal? Or are you running over small bumps and will bounce your foot off the pedal? My first mod was a Defi Elec Boost Gauge, second was a test pipe and downpipe. Boost was fine and didn't do anything weird like how yours is doing.
Jul 17, 2006, 04:57 PM
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alright!!
thanks alot guys...
now i gotta start another thread asking what to get..a MBC or an EBC or do you guys wanna answer me here and save some server memory
?!!
and trust me i've done my homework and searched but still couldnt set my mind.
just for reference the parts that are on order are:
3" Downpipe
Injen intake w/ UICP
and a custom tune (Using Unichip Q+ piggyback ECU)
thanks alot guys...
now i gotta start another thread asking what to get..a MBC or an EBC or do you guys wanna answer me here and save some server memory
?!!and trust me i've done my homework and searched but still couldnt set my mind.
just for reference the parts that are on order are:
3" Downpipe
Injen intake w/ UICP
and a custom tune (Using Unichip Q+ piggyback ECU)
Jul 17, 2006, 04:59 PM
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Originally Posted by SiCKlEyWiKeD
that's not weird at all, read the posts above. His boost is fine
Jul 17, 2006, 05:00 PM
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Originally Posted by EvoRicer
Are you keeping your foot on the pedal? Or are you running over small bumps and will bounce your foot off the pedal? My first mod was a Defi Elec Boost Gauge, second was a test pipe and downpipe. Boost was fine and didn't do anything weird like how yours is doing.
Jul 17, 2006, 05:02 PM
#14
a more stock car will see less boost fluctuation that a car with a freed up exhaust and intake. he has a downpipe, (presumably a turboback exhaust), intake and intercooler pipes. His turbo will spool quicker than the stock ecu is accustomed to reponding, thus leading to a less stable boost curve when contolled by the stock BCS.
Jul 17, 2006, 05:03 PM
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Originally Posted by SiCKlEyWiKeD
the IX's respond really well to ebc, but a good cheap and reliable alternative is an mbc
my tuner suggested he could control boost via stock ecu's solenoid...hmmm
