Another before/after header, dyno

[maneval69]

Here are the numbers
before =HP 293, torque 321
after = HP 297, torque 332
I know that doesn't look good but look at the dyno chart in my sig.
At 3500 rpm there is a HP gain of 28 and a torque gain of 43.
Also, note the A/F relation between the before and after header runs and how the gains relate.



Looks like getting it leaner above 4000 rpm would provide some nice gains.

It sucks that almost all the gains would only be seen in first gear at the track, but is should help my 60’ time.

Conditions
Baseline- 86 degrees, humidity 49%
w-headers- 64 degrees, humidity 54%