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Gizzmo Ebc + Gt3082r On Rb20 Surge Issues

Flux_nz

By Flux_nz,
in Engines & Forced Induction

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Flux_nz Contributor

Flux_nz

Posted
Posted

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 Proficient

Ultimategtr

Posted
Posted

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 Contributor

Flux_nz

Posted
  • Author
Posted (edited)

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 by Flux_nz

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