[LPI]

Ponjohn

"Am interested to learn why the torque and hp spread is so small?"

I just posted an example of a similar style graph pulled from a google search.

The only reason, to explain that a horsepower and torque curve can be different for the following reasons:

1. Boosted engine
2. A different type of firing order camshaft ("C" firing order")
3. Electronic fuel injection (with timing control)

First, the reason for the graph is only to illustrate that we have entered a new age of power and tuning capabilities based on the use of electronic fuel injection with timing control.

The EFI being the similar component in these two examples.

Without going into a huge dissertation on dyno testing a new combination lets just say the graph especially on the torque side did not look anything like it ended up except for the fact that we had a large resolution on the timing control side.

When you go to look for a monitor or other electronic devices you are always looking at and comparing "resolutions", in most cases a higher resolution allows for a better outcome.

The Holley Super Sniper used in this situation has a 31 x 31 resolution timing matrix. We used every cell and in many cases a group of cells are different everywhere.

In our experience and opinion, resolution on the timing side of an EFI system is probably the most powerful, safest and most useful option to look for.

Thus the ability to change the timing points in hundredths as well as being able to change the timing values at different rpm's at different loads (MAP) allows you to make the engine very happy.

Compare this to a "locked out" timing or an interpolated three or five point linear slope, you just cannot make the engine happy nor optimized.

In another thread someone asked why a Pontiac motor can't act like or produce the results of an "LS". We believe with the right components we can meet and or exceed what the competition has to offer.

Yet in another thread someone asked why a Subaru can do what it can, again the answer is EFI/DFI.

We spent nine hours on the dyno that was equipped with some very intelligent sensing capabilities which allowed us to go to the cliff's edge.

Based on the data while utilizing pump gas for this combination, we were still 25% on the safe side of the cliff's edge. This is Pontiac Excitement!