After taking a friend of mine for a run (Set Boost to 14.5 PSI) he told me that my boost doesnt seem to be stable. I couldnt say if this was true or not because i couldnt feel it.

 

So I try to use the graph (SBC-ID Blitz Boost Controller function) and see if this is true or not.

 

First I did a run wuth standart PSI and the graph was very smooth. Boost goes up and stays up. There is a nearly straight line at 11PSI

 

Second run I turn boost on and try again. The result looks like this. Boost goes up to 14.5/15 PSI and then drops down immediately to 12 then goes back to 14.5/16PSI then drops to 12/12.5/13PSI (random). And this goes on and on.

 

Anyone experience this before. What can cause this kind of instability?

 

Thanks.

 

 

 

your getting spike try adjusting your ratio and gain values they are out of whack.

Originally posted by 300z:

your getting spike try adjusting your ratio and gain values they are out of whack.

 

I believe that you might be right.

 

Can you give me some infos of what this values should might be?

 

 

 

well stock blowers actuators i think should not have a gain of more than 5-15

 

my suggestion is to go with around 10 on gain and then between 45-50 i would think for ratio to set 14 psi or around 1 bar.

 

 

If it works the same as my Blitz DSBC (which I am changing for the i-D version when it arrives) it sounds like the limiter value is set too high.

On mine you set the maximum boost pressure and then a value to drop the boost by when it goes over the limit.

If the drop is set too big then the boost drops back too far and gives a noticeable lag as it builds up again.

set the limiter to 14.5 or 15psi and the reduction value to 5 or whatever.

As has been said a gain/ratio of around 5 - 10 is good.