Boost Controller OFF -> Boost Spikes like hell - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

katbak · 02-23-2005, 09:25 PM

I bought the car used, very nice car
Redtop, lots of mods.
It has a greddy profec b spec II boost controller. I made a post before about how I can set it, etc... But thats not the problem.
When I turn the boost controller off my boost spikes like crazy, still, basically as long as i floor the pedal the higher it will go, yes... VERY high... 25lbs ?

...

So I'm asking what are the possible causes of this.
A boost leak...
Hoses not correctly connected...
Where can I find the valve unit under the hood?
Anything else I can visual check?

xVaporx · 02-23-2005, 10:29 PM

is the plastic plug still in the solenoid?

katbak · 02-24-2005, 05:13 PM

where can i find the solenoid, i have checked for it but I don't know in the area of where I should look.

statik · 02-24-2005, 05:31 PM

follow the lines from the wastegate, chances are its mounted to the drivers side strut tower like mine

statik · 02-24-2005, 05:32 PM

also for the sake of your car, try not to boost 25psi again....

dct223 · 02-24-2005, 05:39 PM

t25 is a small turbo, better flow, ie 3" dp and 3" exhuast will cause it to spin VERY rapidly, and the internal waste gate can not open fast enough to control the boost...

thats the case on DSM's, they have t25's and thats the reason why my friends car would spike... so im guessing something similar on the SR?

katbak · 02-24-2005, 06:31 PM

Thanks statik...

WILDACEX187 · 02-24-2005, 07:17 PM

just leave it on and dont blow up the motor.

02-23-2005, 09:25 PM	#1
katbak Leaky Injector Join Date: Jan 2005 Location: Ok Age: 45 Posts: 106 Trader Rating: (0) Feedback Score: 0 reviews	Boost Controller OFF -> Boost Spikes like hell I bought the car used, very nice car Redtop, lots of mods. It has a greddy profec b spec II boost controller. I made a post before about how I can set it, etc... But thats not the problem. When I turn the boost controller off my boost spikes like crazy, still, basically as long as i floor the pedal the higher it will go, yes... VERY high... 25lbs ?... So I'm asking what are the possible causes of this. A boost leak... Hoses not correctly connected... Where can I find the valve unit under the hood? Anything else I can visual check?

02-23-2005, 10:29 PM	#2
xVaporx Leaky Injector Join Date: Jan 2004 Location: Hurricane Target, FL Posts: 143 Trader Rating: (0) Feedback Score: 0 reviews	is the plastic plug still in the solenoid? __________________

02-24-2005, 05:31 PM	#4
statik Zilvia FREAK! Join Date: Oct 2003 Location: Long Island, NY Age: 40 Posts: 1,358 Trader Rating: (0) Rides Gallery: statik Feedback Score: 0 reviews	follow the lines from the wastegate, chances are its mounted to the drivers side strut tower like mine __________________ 97 240sx esaarr \| Current Status: SOLD

02-24-2005, 05:32 PM	#5
statik Zilvia FREAK! Join Date: Oct 2003 Location: Long Island, NY Age: 40 Posts: 1,358 Trader Rating: (0) Rides Gallery: statik Feedback Score: 0 reviews	also for the sake of your car, try not to boost 25psi again.... __________________ 97 240sx esaarr \| Current Status: SOLD

02-24-2005, 05:39 PM	#6
dct223 Nissanaholic! Join Date: Nov 2003 Location: hella NORCAL! Age: 39 Posts: 1,664 Trader Rating: (4) Feedback Score: 4 reviews	t25 is a small turbo, better flow, ie 3" dp and 3" exhuast will cause it to spin VERY rapidly, and the internal waste gate can not open fast enough to control the boost... thats the case on DSM's, they have t25's and thats the reason why my friends car would spike... so im guessing something similar on the SR? __________________ Sfourteen

02-24-2005, 05:13 PM	#3
katbak Leaky Injector Join Date: Jan 2005 Location: Ok Age: 45 Posts: 106 Trader Rating: (0) Feedback Score: 0 reviews	where can i find the solenoid, i have checked for it but I don't know in the area of where I should look.

02-24-2005, 06:31 PM	#7
katbak Leaky Injector Join Date: Jan 2005 Location: Ok Age: 45 Posts: 106 Trader Rating: (0) Feedback Score: 0 reviews	Thanks statik...

02-24-2005, 07:17 PM	#8
WILDACEX187 Post Whore! Join Date: Jan 2003 Location: QUEENZ, NYC Age: 42 Posts: 3,103 Trader Rating: (4) Feedback Score: 4 reviews	just leave it on and dont blow up the motor. __________________ SR POWA COUPE LUVVV!!!