Some real manifolds

[vvega]

depends on how many pulsed you plan to use in your scavanging
and strx7
automoive companys spend a lot of money making production cars make good hp and are reliable
unless you own a caldena :d

as for mainfold material
steam tube makes a good compramise
and stainless is shit because it loves to move when its hot
though you can fix that with some careful planning and prereleaving

if you wanna talk engineering im happy to
but realise i do it for a living.... and have been there and done it

as for ex physics......the only real differance is the heat IMO

and gmacrae
have you ever seen a proper split pulse manifold ??
one with 2 wastegates ??
cause as soon as you join the to streams.....its a waste of time

90% of teh manis you can buy have a single wastegate and is potentially why you dont see advantage

rotarys ?? and piston engines ???
there both air pumps just ones a 2 stroke


do some thery and have a think about it

v

[Crucible]

cause as soon as you join the to streams.....its a waste of time

90% of teh manis you can buy have a single wastegate and is potentially why you dont see advantage

hmmm interesting, that makes sense

My split pulse manifold, (barrys old one) only uses the one wastegate, I know its divided where the two join with a plate but probley wouldnt be completely sealed, wonder if its worth the effort running twin gates???

I thought the plate was there to just keep the flow on path.

I see now why barry uses twin gates, thought it was just a bling feature..

[RedMist]

I think it is opposite => higher revs shorter runners (reasoning is due to wave length being shorter at higher frequency)...

correct, same with inlet manifold runners

Not strictly true. It totally depends on the number of reflections used in the helmholtz calculations. A 4 reflection primary may be shorter than a 3 reflection primary, but the 3 reflection will be tuned for higher RPM. IE longer, but tuned for higher RPM.

[vvega]

depends on how many pulses you plan to use in your scavanging

v

muhahahahah

[Bazda]

anyway.
back to the topic, all fitted etc, racing at pukekohe on the 17th Dec.
Come listen to this escort down by the hairpin cos it sounds magic!