Quote:
Originally Posted by lubeman1969
Would you be able to post the pre and post header dyno sheets? Not doubting, would be neat to see where the gains were
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First graph is of stock (Red), 93 octane tune (Blue), and E85 tune (Orange). This was just with a Rotofab on stock exhaust.
This graph is the final numbers after Kooks headers. I just realized that I actually lost 8 peak torque but gained about 27 peak HP. Kind of hard to see what's going on but if you look at about 6500 RPM on both graphs at the 93 octane tune, HP is about 360 before headers but 410 after headers. Torque at 6500 before is 285 and after headers is about 330.
It is at about 5000 RPM and above where the HP and TQ are extended with headers. I was really surprised the gains in that area were that good.
We did not bother to retune with E85 as it wasn't necessary. I would expect peak HP/TQ would have been about 450 with a similar extension of power and torque above 5000.