Quote:
Originally Posted by Richard Hudgins
Vector1,
If you have the standard JBL headers and sidepipes they are:
Primaries:
3rd Harmonic = 31.6 inches long 1.75 Dia.
Collector:
3rd Harmonic = 33.6 inches long 3 inch Dia.
This was the best compromise that I could provide for the various 351 derivatives.
They are pretty close to your program numbers.
But of course not optimal.
|
hello richard
i had no doubt that the headers were optimally designed. through the rpm band there is a point where the exhaust gets to be almost like a f1 shreek, even with ear plugs it is ear splitting, could be some other factors also.
from what i understand of the program optimum is usually within a couple inches either side when tuned on a dyno but not much difference in power. collector length followed by primary length then primary size would be order of importance if i remember correctly.
one problem with the jbl, i can't find enough twisties!
