HOW TO - Control boost using ECUFLash and 3 port GM boost solenoid
Nov 10, 2008, 12:01 PM
#362
Evolving Member
Great thread, very interesting....
I got one question..
In my corner of the world, the GM BCS's are very hard to come by... I have a faulty GReddy Profsec B II boost controller, the electronic in the box is blown, and was wondering if I could use the GRreddy 3 port solenoid in place of the GM unit.
Thx
I got one question..
In my corner of the world, the GM BCS's are very hard to come by... I have a faulty GReddy Profsec B II boost controller, the electronic in the box is blown, and was wondering if I could use the GRreddy 3 port solenoid in place of the GM unit.
Thx
Nov 10, 2008, 12:58 PM
#363
Great thread, very interesting....
I got one question..
In my corner of the world, the GM BCS's are very hard to come by... I have a faulty GReddy Profsec B II boost controller, the electronic in the box is blown, and was wondering if I could use the GRreddy 3 port solenoid in place of the GM unit.
Thx
I got one question..
In my corner of the world, the GM BCS's are very hard to come by... I have a faulty GReddy Profsec B II boost controller, the electronic in the box is blown, and was wondering if I could use the GRreddy 3 port solenoid in place of the GM unit.
Thx
Nov 28, 2008, 05:34 PM
#364
Just an observation if I understood right:
I do not have the exact R values from the stock BCS, nether the GM 3 ports but since everybody seems to explain that the 10 ohms resistor is to simulate a 28-32 ohms from factory BCS... Math tell me that the power of the additional resistor should be at least 2 watt (and not 1 as mentioned) .
And regarding R vs response time, may be it will be good to try with a normalized 8.2 ohms - 3W.... That's just my opinion....
I do not have the exact R values from the stock BCS, nether the GM 3 ports but since everybody seems to explain that the 10 ohms resistor is to simulate a 28-32 ohms from factory BCS... Math tell me that the power of the additional resistor should be at least 2 watt (and not 1 as mentioned) .
And regarding R vs response time, may be it will be good to try with a normalized 8.2 ohms - 3W.... That's just my opinion....
Nov 28, 2008, 07:15 PM
#365
Just an observation if I understood right:
I do not have the exact R values from the stock BCS, nether the GM 3 ports but since everybody seems to explain that the 10 ohms resistor is to simulate a 28-32 ohms from factory BCS... Math tell me that the power of the additional resistor should be at least 2 watt (and not 1 as mentioned) .
And regarding R vs response time, may be it will be good to try with a normalized 8.2 ohms - 3W.... That's just my opinion....
I do not have the exact R values from the stock BCS, nether the GM 3 ports but since everybody seems to explain that the 10 ohms resistor is to simulate a 28-32 ohms from factory BCS... Math tell me that the power of the additional resistor should be at least 2 watt (and not 1 as mentioned) .
And regarding R vs response time, may be it will be good to try with a normalized 8.2 ohms - 3W.... That's just my opinion....
https://www.evolutionm.net/forums/sh...d.php?t=379043
Dec 2, 2008, 12:52 AM
#367
Evolving Member
Hi..
I recently changed back to ECU controlled boost suing a Greddy 3 port soleniod.
My biggest problem is trying to sort out the dip at 4000-4500 rpm.
I have seen this before on the forums, and it seems to be quite a common problem with ECU controlled boost.
MY thinking is that it could be due to the spike at peak boost (3700rpm) and the dip is just the ECU doing it thing to try and bring it back into line.
It doesn't really make any sense why it is doing any corrections because my "Turbo
Boost Error correction" table is all zero's.
Unfortunately I am unable to log boost atm, my Zeitronix will be arriving soon.
With the attached log below, I am boosting 1,8bar tappering down to 1,45 at 7000rpm.
My mods are.
Std Evo 8 turbo.
Megan O2 housing.
Works down pipe.
Custom 3" exhaust with Megan back box.
BC 272 cams.
Greddy 3 port solenoid.
Full Nisei LICP and UICP.
K&N large cone filter with adaptor.
Forge BOV using 2 spacers with the red spring.
I am at "Elevation: 1,753 M (5,751.3 FT)".
Please take a log at my 3rd gear logs below and also my current boost settings. Any advice to get rid of that dip will be most welcome
Thx
I recently changed back to ECU controlled boost suing a Greddy 3 port soleniod.
My biggest problem is trying to sort out the dip at 4000-4500 rpm.
I have seen this before on the forums, and it seems to be quite a common problem with ECU controlled boost.
MY thinking is that it could be due to the spike at peak boost (3700rpm) and the dip is just the ECU doing it thing to try and bring it back into line.
It doesn't really make any sense why it is doing any corrections because my "Turbo
Boost Error correction" table is all zero's.
Unfortunately I am unable to log boost atm, my Zeitronix will be arriving soon.
With the attached log below, I am boosting 1,8bar tappering down to 1,45 at 7000rpm.
My mods are.
Std Evo 8 turbo.
Megan O2 housing.
Works down pipe.
Custom 3" exhaust with Megan back box.
BC 272 cams.
Greddy 3 port solenoid.
Full Nisei LICP and UICP.
K&N large cone filter with adaptor.
Forge BOV using 2 spacers with the red spring.
I am at "Elevation: 1,753 M (5,751.3 FT)".
Please take a log at my 3rd gear logs below and also my current boost settings. Any advice to get rid of that dip will be most welcome
Thx
Dec 2, 2008, 09:49 AM
#369
Evolving Member
I did try something similar but made other changes as well which caused too much confusion. I guess the best method is to make one change at a time to see the differences.
Feb 1, 2009, 08:35 AM
#371
Tuning for 30psi is no different than tunign for 20psi. Just start with low values and work your way up, until you get to the level you want. Make sure your AFR and timing are in check (with no knock) as you do this, or you'll be an unhappy camper 
I run 29-30psi daily on this same setup.
I run 29-30psi daily on this same setup.
Feb 4, 2009, 08:05 PM
#375
LOL sorry everyone, I can't believe I left that part out. That would explain all the PMs from people....
Juggling a conference call and typing wasn't a good idea. Need to work on my multi-tasking skills.
I ordered through amazon.com, just paste in the part # and it will show up. I believe the solenoid was $15 and pigtail was $25. Yea, I know its weird the pigtail was more, but you get free shipping if you get one from amazon directly.
AC Delco on amazon has the pigtail for $16, but then you would have to pay seperate shipping for solenoid and pigtail.
Juggling a conference call and typing wasn't a good idea. Need to work on my multi-tasking skills.
I ordered through amazon.com, just paste in the part # and it will show up. I believe the solenoid was $15 and pigtail was $25. Yea, I know its weird the pigtail was more, but you get free shipping if you get one from amazon directly.
AC Delco on amazon has the pigtail for $16, but then you would have to pay seperate shipping for solenoid and pigtail.