Spiking Like Crazy!

[jd06]

Hey folks just after some advice here, I am struggling to figure this one out!

I recently installed a Blitz DSBC Spec S Single Solenoid boost controller on my car (R33 S2).

The car is standard with a 3" exhaust/ dump pipe & pod filter.

After setting the desired settings (NORMAL 0.5 bar HIGH 0.7 bar) I noticed the boost spikes dramatically (to approx 0.95 bar) during vigorous gear changes. The boost stabilizes a split second after a gear change has been made.

I have managed to reduce the severity of spiking by lowering the boost warning setting but this just leads to jerky power delivery as the boost controller tries to constantly correct boost during gear changes.

Strangely, when the boost controller is switched off this spiking still occurs.

How can this be cured?

This boost controller does NOT offer GAIN or boost response settings?

Any suggestions or help is welcome. Thanks guys!

[ish]

hmm i would say a small crack or leak in the actualtor line !

[jd06]

Thanks for the advice! If the actuator line is OK what else could be causing the spiking???

[otto]

the wastegate is inadiquet (spelling)

[ULOOOK]

I had a spec s boost controller on my skyline (r33 s1). I was told that once you go over .7 bar the boost solenoid needs to be upgraded($110). I think its even written in the operating instructions. I tried to run mine at 1 bar and it just went stupid, spiking to 1.5 bar. So i got rid of it.

[jd06]

I had a spec s boost controller on my skyline (r33 s1). I was told that once you go over .7 bar the boost solenoid needs to be upgraded($110). I think its even written in the operating instructions. I tried to run mine at 1 bar and it just went stupid, spiking to 1.5 bar. So i got rid of it.

I am currently using the non standard Blitz Solenoid that was bundled with the boost controller.

The factory Nissan one has been removed. It's puzzling... When I turn the Blitz controller off it runs 0.5 bar (standard). However if the car is pushed harder i.e. quick gear change it will still spikes!

What are Blitz Boost controllers like as a general rule??? Are the problematic?

[jd06]

I am currently using the non standard Blitz Solenoid that was bundled with the boost controller.

The factory Nissan one has been removed. It's puzzling... When I turn the Blitz controller off it runs 0.5 bar (standard). However if the car is pushed harder i.e. quick gear change it will still spikes!

What are Blitz Boost controllers like as a general rule??? Are the problematic?

Hey guys, any more ideas with this one???

Surely someone else out there has had similar troubles.

Cheers.

[mad082]

just out of curiousity, where is the pressue hose run from? is it run from the bov hose is it? possibly done when fitting a front mount cooler.

i had spiking with my $22 controller after i did my cooler install. i had the hose hooked from the bov hose (like it shows in the instructions). this caused spiking on gear changes. i moved the hose to the 'hot' cooler pipe (took the nipple off the old cooler pipe and stuck it on the hot pipe). this solved my problem.

[Flea]

just out of curiousity, where is the pressue hose run from? is it run from the bov hose is it? possibly done when fitting a front mount cooler.

i had spiking with my $22 controller after i did my cooler install. i had the hose hooked from the bov hose (like it shows in the instructions). this caused spiking on gear changes. i moved the hose to the 'hot' cooler pipe (took the nipple off the old cooler pipe and stuck it on the hot pipe). this solved my problem.

The boost controller pressure hose taps into the fuel pressure regulator or the small vacuum hose coming out of the front of the plenum chamber.

I also have a mechanical boost gauge tapping into this same location. Do you think I should relocate the boost pressure line?

The pressure hose for the boost controller itself is small in diameter. Approximately the same size as the factory vacuum line exiting the back of the plenum...

[mad082]

The boost controller pressure hose taps into the fuel pressure regulator or the small vacuum hose coming out of the front of the plenum chamber.

I also have a mechanical boost gauge tapping into this same location. Do you think I should relocate the boost pressure line?

The pressure hose for the boost controller itself is small in diameter. Approximately the same size as the factory vacuum line exiting the back of the plenum...

so the hose is rather long? i would relocate the pressure line to before the cooler. that way the hose will be nice and short. and it also won't suffer spiking due to cold nights.

you will find that companies like HKS have the wastegate line coming off the compressor side of the turbo.

[jd06]

so the hose is rather long? i would relocate the pressure line to before the cooler. that way the hose will be nice and short. and it also won't suffer spiking due to cold nights.

you will find that companies like HKS have the wastegate line coming off the compressor side of the turbo.

Cheers for the advice mate! I might have to redo the hose set up in this case...

[justin911]

umm i got the same boost controller.... and it definetly offers set/gain settings....

you sure u read the manual on howto set it up properly ?

sounds like you havnt entered the 'set' value correctly..

btw, lemi know if you need the manual for it (took me ages to find online)

This boost controller does NOT offer GAIN or boost response settings?

Any suggestions or help is welcome. Thanks guys!

[justin911]

i run mine on 12psi, has no spiking issues....

i think the limit is 16psi for the spec-s, not .7 bar

I had a spec s boost controller on my skyline (r33 s1). I was told that once you go over .7 bar the boost solenoid needs to be upgraded($110). I think its even written in the operating instructions. I tried to run mine at 1 bar and it just went stupid, spiking to 1.5 bar. So i got rid of it.

[jd06]

i run mine on 12psi, has no spiking issues....

i think the limit is 16psi for the spec-s, not .7 bar

The Blitz I have only has a single solenoid (Spec S version).

The manual I have is in Japanese so its not much use to me

My high boost setting is set for around 10psi but it spikes well above this (approx 13psi)

When I toggle the controller (left mode button) I don't have a gain function.

If you could post up the manual you are referring to that would be great!

Thanks

[justin911]

change menus till you get to the 'set' screen. then press and hold down "mode" for a few seconds, that will change to the gain value and let you change it.

for my r33 gtst, i have 11 / 48 values. Which gives me a tiny bit over 12psi.

When I toggle the controller (left mode button) I don't have a gain function.

If you could post up the manual you are referring to that would be great!

Thanks

SBC_SPECS.pdf

[jd06]

change menus till you get to the 'set' screen. then press and hold down "mode" for a few seconds, that will change to the gain value and let you change it.

for my r33 gtst, i have 11 / 48 values. Which gives me a tiny bit over 12psi.

Ahh thanks mate, you are a gent

[jd06]

change menus till you get to the 'set' screen. then press and hold down "mode" for a few seconds, that will change to the gain value and let you change it.

for my r33 gtst, i have 11 / 48 values. Which gives me a tiny bit over 12psi.

Ahh thanks mate, you are a gent

[jd06]

change menus till you get to the 'set' screen. then press and hold down "mode" for a few seconds, that will change to the gain value and let you change it.

for my r33 gtst, i have 11 / 48 values. Which gives me a tiny bit over 12psi.

Hey Justin,

I have now found the GAIN setting thanks heaps!!! What GAIN setting do you suggest? What do you run?

I have a stock turbo, standard cooler & 3 inch exhaust.

[justin911]

i use 11 for my gain.

try something like that... yours is probably on the default setting of like 30 or something

Hey Justin,

I have now found the GAIN setting thanks heaps!!! What GAIN setting do you suggest? What do you run?

I have a stock turbo, standard cooler & 3 inch exhaust.