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There are some serious issues with that torque curve tho..... That is not normal at all! I have dynoed 3 F's and that is not normal... In any mode...

 

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according to andy, the elite headers require that the engine be removed. it has been stated from sikky that the engine does not have to be removed to install them, it can be done from underneath.

this is a huge factor. especially since i take joy in doing things myself, i will be putting on my headers. this means i have to do a lot less work.

I was wrong, we put the prototype headers in by pulling the subframe. It worked very actually.

 

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I have been thinking about this all day and its bugging me... I have looked at all the dyno charts I have here for the F's... I find a few things very interesting... #1 The torque curve is absolutely the WORST curve I have ever seen, it should be flat. #2 The headers gain only 5 HP all the way up to 5200 rpm ish... That seems really odd because you would think the power increase would be linear..

Look at the difference in the torque curve of splats and Sikky's. It just doesn't add up..

 

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At what rpm does the F get "on cam"? Just like a turbo car, the more agressive the cam profile, the more important your exhaust path is. IE, you are going to be seeing larger increases when the car is on the more agressive cam profile.

Also, the torque curves are similar, it's just the different scaling on the graphs that is exagerating the differences. You can see two small peaks in the torque curve on your DD dynno, but the two peaks on the other graph are much more visable due due the differences in scaling.

The problem with that is my torque curve never drops in the middle....... his drops 20-30 ftlbs in that valley... That should not happen....

 

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This says it all, I don't think we need to say much more. But I will add that this really comes down to the difference in dyno's. The dynapack is far more sensitive and will show fluctuations more than the dynojet. The mass of the rollers spinning tends to smooth dyno plots out and will not show the fluctuations that are present as clearly. Also, for comparison sake this setup has no tunning software or AEM ems setup on it. This factor pretty much eliminates the validity of a comparison between the two cars and there dyno plots.

The only thing Splats car has extra is the ported intake.... There was no tuning done to that car.

On another note after dynoing our headers I now see that they do affect the torque curve and after scaling our graph the same as yours, they are similar. I still don't understand why you scaled it that way... but it is a valid curve.