Variable boost pressure in one gear
Thread Starter
Joined: Feb 2002
Posts: 1,640
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From: Tacoma WA
Variable boost pressure in one gear
Tell me what's wrong.... here is the stock dyno:
Here is the dyno with my boost controller turned on.
It varied from 9-12 psi in the same gear / pull. I don't have an FCD, but my Air Fuel Ratio Mixture actually read rich at 12psi. Am I supposed to have the turbo feeding into the boost controller and bypass the stock duty solenoid altogether?
Here is the dyno with my boost controller turned on.
It varied from 9-12 psi in the same gear / pull. I don't have an FCD, but my Air Fuel Ratio Mixture actually read rich at 12psi. Am I supposed to have the turbo feeding into the boost controller and bypass the stock duty solenoid altogether?
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
Likes: 8
From: Auckland, New Zealand
Originally posted by Arpus
Am I supposed to have the turbo feeding into the boost controller and bypass the stock duty solenoid altogether?
Am I supposed to have the turbo feeding into the boost controller and bypass the stock duty solenoid altogether?
Those are pretty lines though...
Last edited by NZConvertible; Apr 26, 2003 at 07:45 AM.
Rotary Enthusiast
Joined: May 2002
Posts: 1,203
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From: Boston
Arpus what is your car and what are your mods?
Also, how does he have 2 boost controllers, where is the stock soleniod?
And last question, is the dyno supposed to be all wavey like that? Is that normal?
Also, how does he have 2 boost controllers, where is the stock soleniod?
And last question, is the dyno supposed to be all wavey like that? Is that normal?
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
Likes: 8
From: Auckland, New Zealand
The Series 5 already has electronic boost control, via an ECU-controlled solenoid. If you fit an aftermarket EBC, you must bypass the stock solenoid. Running both controllers together obviously caused rapidly fluctuating boost as the two systems fought each other, which is what produced the wavy lines.
Senior Member
Joined: Aug 2002
Posts: 311
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From: Parkersburg, West Virginia
All hail the problem-less N/A!! 
Strange dyno though...I can't tell what I'm looking at and even I know that it ain't supposed to do that...
Strange dyno though...I can't tell what I'm looking at and even I know that it ain't supposed to do that...
Last edited by RX7_ZRO; Apr 27, 2003 at 07:22 AM.
Thread Starter
Joined: Feb 2002
Posts: 1,640
Likes: 2
From: Tacoma WA
ok.. I've disconnected the lines running to the stock solenoid. And disconnected the connector on the solenoid. It only makes 6 psi now.
With an EVC II, is the solenoid supposed to be mounted a certain way?
With an EVC II, is the solenoid supposed to be mounted a certain way?
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Thread Starter
Joined: Feb 2002
Posts: 1,640
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From: Tacoma WA
NZ I've read a couple of your posts on boost but I want to be clear on something. Is the line from the turbo housing to the boost controller supposed to have the restriction pill in it or not?
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
Likes: 8
From: Auckland, New Zealand
Originally posted by Arpus
Is the line from the turbo housing to the boost controller supposed to have the restriction pill in it or not?
Is the line from the turbo housing to the boost controller supposed to have the restriction pill in it or not?
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