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Old Aug 4, 2015 | 09:56 AM
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03Ev0luti0n's Avatar
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Grimmspeed EBCS over boosting

Kind of lost on this...

Running Tephra V7 and ECU controlled boost on a BW 7670 w/ Dual EWGs.

Was running the EBCS as a 2 port system (top port of EWG was vent to atmosphere) car was extremely laggy but made boost and held great at roughly 40% WGDC. It just wasn't very consistent. Target would vary between 18-25 lbs.

I changed the WG plumbing to a 3 port system as I was told it may help with lag and more consistent boost curve. I zeroed BEC table and set WGDC to 5%. No it's boosting to 30 psi consistently at 5% WGDC?

When I was running a stock turbo I had to drop my boost adder to 10.6 to keep the stock turbo from over boosting at just 50% WGDC despite living in Atlanta, GA and no where near that high of an elevation. Do I need to just keep dropping the Boost Adder? My target boost is set at 24.9psi

Last edited by 03Ev0luti0n; Aug 4, 2015 at 09:58 AM.
Old Aug 4, 2015 | 01:32 PM
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03Ev0luti0n's Avatar
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From: Dallas, Georgia
Originally Posted by 03Ev0luti0n
Kind of lost on this...

Running Tephra V7 and ECU controlled boost on a BW 7670 w/ Dual EWGs.

Was running the EBCS as a 2 port system (top port of EWG was vent to atmosphere) car was extremely laggy but made boost and held great at roughly 40% WGDC. It just wasn't very consistent. Target would vary between 18-25 lbs.

I changed the WG plumbing to a 3 port system as I was told it may help with lag and more consistent boost curve. I zeroed BEC table and set WGDC to 5%. No it's boosting to 30 psi consistently at 5% WGDC?

When I was running a stock turbo I had to drop my boost adder to 10.6 to keep the stock turbo from over boosting at just 50% WGDC despite living in Atlanta, GA and no where near that high of an elevation. Do I need to just keep dropping the Boost Adder? My target boost is set at 24.9psi

solved the issue.. not sure if anyone else has had this issue.. JeffBeagley posted a diagram of Tial EWGS run to Grimmspeed EBCS. it can be found here:

https://www.evolutionm.net/forums/ec...l#post11487987


The grimmspeed doesn't come with a diagram how to run 3 port on EWGs. not sure if anyone else is having or had this issue.. Grimmspeed shows port 2 as the charge port but it is actually the vent to atmosphere port.
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