ok so how does one go about determining what the best header tube length would be for a particular engine and would the difference be significant enough to to go the trouble? specifically, we are building a 284 injected flathead for a dragster and my first thought was to just put short stacks on it and be traditional but wouldnt i see big gains in scavenging and top end hp figures with a custom set of headers on it? please someone" edjikate" me on this so i can get the most from this engine...thanks
Many benefits but it takes a lot of trial and error plus a dyno wouldn't hurt either. Best advise is to talk to someone who specializes in building flatheads for drag racing, because trial & error sucks (fun, costs a lot of money but still sucks)! The guys who specialize in it already did the R&D work and spent their money so you won't!
To begin with, Jetmek, go here: http://www.wallaceracing.com/Calculators.htm I'm sure you'll find something worthwhile. Put exhaust dividers in the center ports. Rev the daylights out of it. Have fun Jim
I heard something about the crayon method? Something like cut at the point where the crayon burns off?
This is to determine where an "H" or "X" pipe crossover should be. For header tube length calculation, use this... http://www.bgsoflex.com/bestheader.html
This is how they do Briggs motors,Might work on Flathead ford their both Flathead`s. I am guessing you are doing zoomies. So here it goes.They make them long and paint them with cheap paint. run the motor down the track. the paint on the ends of the headers will burn and bubble. Cut the ends off where the good paint Starts.I have never done this only heard about in the past. Pete.
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