Greg@GLD
09-23-2004, 07:52 AM
Well, now that I have one, I can see how valuable a tuning tool the EFI Systems/Anderson Ford PMS system is. Was talking to Bob Kurgan last night and he says "How much boost are you making?" I answer "11-12 PSI"
Then he says "What is your base fuel pressure?"
"39 PSI w/vaccum line connected"
He says "You're running out of fuel around 5600 RPM"
I wanted to know how he knew this, of course he has years of blower tuning experience. He wanted to know the injector duty cycle, which the PMS displays. I have only had a day to play with the PMS, and looking at the data terminal while driving is not wise. So I get my kid to ride with me and stare at the screen while I hammer it. At lo and behold, at 5600 RPM the duty cycle is at 96%.
:thud:
We can fix this via fuel pressure increase and PMS tuning. But it is obvious that with the 30's I was running out of fuel, and that's why I could not get beyond 5 PSI w/o a problem.
The tune-abiity with this device is awesome. All I could do with the Extender was to set a targeted A/F ratio that is constant thruout the entire powerband, and it is not "boost sensitive" either. With this device we can tune based on 500 RPM increments as well as boost pressure. So, rather than use a BTM, we can set the parameters precisely how we want them. We can tell it to add timing before the boost comes on and to subtract it when it does come on, and it's an absolute setting, unlike a BTM. BTM is a crude device by comparison. There's much more to it, but my initial impression is that this is a "must have" for a blower car. While there is a learning curve here, I am already getting comfortable with the data input functions. If you run a blower and can find one of these used, I'd grab it. It's worth the money.
I think I have enough clutch to try to take on SMOKDU at the shootout :hehe:
Then he says "What is your base fuel pressure?"
"39 PSI w/vaccum line connected"
He says "You're running out of fuel around 5600 RPM"
I wanted to know how he knew this, of course he has years of blower tuning experience. He wanted to know the injector duty cycle, which the PMS displays. I have only had a day to play with the PMS, and looking at the data terminal while driving is not wise. So I get my kid to ride with me and stare at the screen while I hammer it. At lo and behold, at 5600 RPM the duty cycle is at 96%.
:thud:
We can fix this via fuel pressure increase and PMS tuning. But it is obvious that with the 30's I was running out of fuel, and that's why I could not get beyond 5 PSI w/o a problem.
The tune-abiity with this device is awesome. All I could do with the Extender was to set a targeted A/F ratio that is constant thruout the entire powerband, and it is not "boost sensitive" either. With this device we can tune based on 500 RPM increments as well as boost pressure. So, rather than use a BTM, we can set the parameters precisely how we want them. We can tell it to add timing before the boost comes on and to subtract it when it does come on, and it's an absolute setting, unlike a BTM. BTM is a crude device by comparison. There's much more to it, but my initial impression is that this is a "must have" for a blower car. While there is a learning curve here, I am already getting comfortable with the data input functions. If you run a blower and can find one of these used, I'd grab it. It's worth the money.
I think I have enough clutch to try to take on SMOKDU at the shootout :hehe: