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**JohnStranahan** · 12-07-2007, 05:28 PM

I made a decision to keep most all emission systems so the computer would not throw a trouble code and also to keep emissions low. I have a suspicion the EGR turns off or down at wide open throttle to achieve maximum power, but I don't know this to be true. It is off at idle.
This is reinventing the wheel, but the actual wheel is very expensive and does not control emissions.
I don't think my version of the SCT has the ability to turn off the egr trouble code. It does have two settings that are going to help the project. The first is WOT percentage of fuel. This can be upped or lowered in 2 % incrememts. Very fortunately (Randy leaked out to me in a phone converstion) it also tugs the entire fuel map up with it having the most effect at WOT. I added 6% WOT fuel to fix a bog around 2500-3500 RPM. The engine has never run better in the corners.

Another feature of The SCT is the ability to raise the fuel pressure. The way I understand this is that the duty cycle will remain the same but slightly more fuel will be delivered due to the higher pressure. This allows me to raise or lower the entire fuel map equally at high and low RPM.

Timing can be adjusted in narrow RPM bands. This will be helpful to tune the new system as well.

John

12-07-2007, 05:28 PM	#14
JohnStranahan Junior Member Join Date: Dec 2004 Posts: 96	Re: Suzuki GSXR 750 quad Throttle Body Install on 2.3 L Duratec I made a decision to keep most all emission systems so the computer would not throw a trouble code and also to keep emissions low. I have a suspicion the EGR turns off or down at wide open throttle to achieve maximum power, but I don't know this to be true. It is off at idle. This is reinventing the wheel, but the actual wheel is very expensive and does not control emissions. I don't think my version of the SCT has the ability to turn off the egr trouble code. It does have two settings that are going to help the project. The first is WOT percentage of fuel. This can be upped or lowered in 2 % incrememts. Very fortunately (Randy leaked out to me in a phone converstion) it also tugs the entire fuel map up with it having the most effect at WOT. I added 6% WOT fuel to fix a bog around 2500-3500 RPM. The engine has never run better in the corners. Another feature of The SCT is the ability to raise the fuel pressure. The way I understand this is that the duty cycle will remain the same but slightly more fuel will be delivered due to the higher pressure. This allows me to raise or lower the entire fuel map equally at high and low RPM. Timing can be adjusted in narrow RPM bands. This will be helpful to tune the new system as well. John