inlet manifold

[jowley]

right im making a custom inlet manifold and heres 3 designs comments please

 

[frank]

if its single t/b, plenum ftw as fitted to most new cars, and ram air will be very speed dependant (loads in top gear, but sweet f/a in 1st gear )
http://www.micra.org.uk/attachment.php?attachmentid=13216&stc=1&d=1247512455
http://www.micra.org.uk/attachment.php?attachmentid=13217&stc=1&d=1247512455

 

[jowley]

im going to want as much power gain too and is unsure weather a longer manifold is better than short

 

[Alienfish360]

Even and equal is best, but take into account your wiring, and position for accelerator cable also.