Gizzmo Ebc + Gt3082r On Rb20 Surge Issues

[Flux_nz]

Hey guys,

I've had my car running a gt3040 + gizzmo ebc (non MS) for about a year now.

Holds boost well, given the turbo is known for surging...

While reading the forums i read up a bit on setting the gain closer to the boost level, bringing boost on faster etc.

Seems simple enough, so i gave it a test - however find that it spikes really really bad!

E.g if i set my boost to be 14psi its fine with gain at 0, but if i have gain at 13psi it spikes bad then jumps back and forward between about 12 and 16 psi

What im looking to know is what gain people use on their gizzmo's - is it -1psi from the max boost as the manual states? - if so do you have this similar problem?

[Ultimategtr]

Which gizmo uni u got? the MSIBC or the IBC?

I have the msibc and the rule of thumb was NOT to have the gain the same or higher then the duty cycle..

eg with the stock turbo/actuator i ran 25 gain and 30 d/c and it gave me around 8psi (i think).

If you set the gain the same as the d/c or higher, you WILL get creep/surge issues - Why, i dont know. I think its just how fast the actuator opens/closes the gate.

What is the setting on ur controller when u get surging? ie d/c, gain..

Also, youre running closed loop i presume?

[Flux_nz]

Running the IBC, not MSIBC as stated

Gain is set in PSI amounts, D/C is set in values between 1-100 or whatnot to open and close the solinoid at the set intervals.

So in this case the D/C is a value of 62 giving 14psi, and gain is a value of '13' - 1psi away from the max boost under the given D/C (14psi) - so -

DC = 62

Gain = 13

The IBC doesnt allow you to set the gain higher than the set boost limit and as a result you cant set the gain untill the D/C is done and set with a boost level.

It only allows to be as close as 1psi to it, never past it and never the same - only ever below it.

So any other ideas?

How do i know if its closed loop?

Edited June 9, 2009 by Flux_nz