HPTuner experiments

I've been playing with this tuning business for almost six years now, and one of the things that keeps me baffled is how come people ...

Long time ago I realized that we never look at the behaviour of the stock cars, only at the (often misbehaving/miscalibrated) modified one...

As you saw in the previous post, the way we grouped injectors was very simple, we simply sorted them by flow and picked 'top 4' and ...

So while discussing my findings from earlier this morning, I had this stray thought:  since we know what which injector flows separately, wh...

This is nothing new; I've written about it before HERE . However, I don't know why this is still such a ripe source for arguments, ...

This is an explanation, representation, and pros & cons of the Parametric VE. I was told to cut it out with the math, so here it is wate...

This is a short demo of why in addition to the traditional MAX, MIN, and AVG aggregates of data we also need STD (Standard Deviation). Norma...

In physics, when you're trying to get to the bottom of something, you usually have a model (a formula) and some data (variables with val...

I created a quick and dirty spreadsheet that approximates CrankingVE, based on PrimaryVE table. The tables are done in EFILive format, so HP...

Both E38 and E40 ECU's have a Temperature Bias table with both Airflow and Speed axis, making us think that it's using both to deter...