Forcefed Z Posted April 3, 2007 Share Posted April 3, 2007 Im fabing a turbo manifold, and I was wonderign how an equal length header is measured....I was measuring the longest length of the bend, but it seems the best way to do it would be by volume, mabe someone can enlighten me.... thanx, DUSTIN Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted April 3, 2007 Share Posted April 3, 2007 ON A TURBO, exhaust tunning by primairy length, is far less important than clearance,your not useing the vacuum to scavage the cylinders, and access issues,are far more important, build it to gain easy access and clearance,keep in mind heat damage to near by parts,access to bolts, gasket instalation,adjusting valves, valve cover sealing,spark plug access, ignition wire routing, any potential advantage in tuned length will be all but meaningless compared to maintinance and clearance issues think STAINLESS and vibration stress, access, routing and ease of maintinance Quote Link to comment Share on other sites More sharing options...
CRAVED Posted April 4, 2007 Share Posted April 4, 2007 Pay more attention to the collector arrangement to ensure a smooth transition from the runners to the turbo flange, than the exact length of the runners .. you will also need to work out your runner length and thickness of material that is required for your application .. thicker wall/smaller tube will aid in spool time, but restrict flow up top .. reverse for bigger runner ID Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted April 4, 2007 Share Posted April 4, 2007 http://forums.hybridz.org/showthread.php?t=116979 another thread on turbo manifold building i measured my by counting how many elbows i used, and measureing the length of the straight pipe i used. Quote Link to comment Share on other sites More sharing options...
Forcefed Z Posted April 5, 2007 Author Share Posted April 5, 2007 Primairy length being the greatest distance in the bend? This manifold has lots of space to work with so im not worried, ive fit it all up so far and it fits and looks pretty good, its for a FC rx7 with a 20b. Ive used 2" sched 10 304 stainless pipe wich works realy well and was easy to come by....as for the runner lenghts, they are all equal the way ive measured it but I had a realization the it wont realy matter because of the flow charecteristics of the rotary engine(3 pulses every 360deg each runner) Nonetheless its still looks wicked !! Quote Link to comment Share on other sites More sharing options...
johnc Posted April 5, 2007 Share Posted April 5, 2007 http://www.burnsstainless.com/TechArticles/Construction/construction.html Quote Link to comment Share on other sites More sharing options...
CRAVED Posted April 11, 2007 Share Posted April 11, 2007 thats a good read, thanks Quote Link to comment Share on other sites More sharing options...
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