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2.0s Capri is what I have on the big lump photo, that one you have looks like it has been made to fit around the Sierra foot well. I suspect it's a custom made Capri job then chopped to fit.
Exhausts produce a pulse every time the valve closes. If they all fire in order then the pulses all run in order down the pipes. If two of the pipes are different lengths then the exhaust pulses start to overlap, if two pulses collide then you have doubled the theoretical quantity of gas trying to occupy the same part of the pipe at the same time. This produces an uneven flow of gas up the secondary pipe and slows the gas down.
Thats a shit explanation but the only other comparison I could come up with is 'crossing the streams' on Ghostbusters...
ok iv text andy previous restorer of sierra. hes not shure but thins it may be 20l s capri. :-)
why ade apart from the weight ..? cant make make that much difference can it...?
oooooooooooooooo works for me......:-))))
Tomorrow ill post photographs, unpainted, naked !!
steve id be up for that. im sick of these tin manifolds that last a year. got any pics :-))))
Sorry, CAST crossflow manifolds and proper 4 branchs are a world apart.
yeah but crossflow manifolds don't provide the best flow rate.
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