Okay, first of all I do not have a VPC in my car, but just like you I noticed that everyone seems to have one so I went through the trouble of figuring out just what exactly it does.
Here's what I've gathered so far... I'm no expert so please take this for what it's worth.
The VPC converts the car's airflow metering from mass air to speed density. This conversion allows for the removal of the mass airflow-metering device, which is a bottleneck to airflow. As far as I can tell this becomes increasingly critical at or above 500 horsepower.
I also heard it gains around 20RWHP....but what I want to know is the difference between the stock MAF measurements compare to VPC's speed density measurement. would that be more accurate? does it help balancing out A/F ratio or fuel curve in anyway?
is it more of a single turbo "must" mode instead of BPU?
Both mass air and speed density measure the same thing in different ways. I don’t believe that either method is more accurate than the other. However, one method allows for more air to flow through the intake than the other. Namely, by switching to speed density you are in effect removing an inhabitance to airflow - i.e. the mass air meter.
The mass air meter is a physical protrusion residing along the path of your engine’s intake. By removing this protrusion you allow more air to flow through your engine’s intake.
This is one of those things that would take about 30 seconds to explain if I could point out exactly what I’m talking about, but could take forever to explain in words. I hope this helps.
Are you guys using a sensor ground for your bcc or chassis ground? I don't want to cut my harness so came up with this rough contraption. Something so simple yet 14-15 lbs boosts cuts every time. I started at 4.30v, kept turning it down after pulls to see if that was the case and nope still...
Will be installing 272 BC cams, springs, retainers, keepers and of course those pesky oem seals.
Still a bit confused on when I need to put motor at TDC since I am doing the "rope trick" does this matter?
So would you do shimless buckets like this?
Please correct if wrong.
So my odometer stopped working and i have resoldered it 2 times and everytime, it starts counting for about 5km and then stopps again. I have done the splice mod on the connector on the back also have tried putting it back to original and also tried removing my speedo converter but it didnt...