how to make an intake manifold

[CB7lx91]

Tell me if I am wrong, to make an intake manifold, you cut the runners a little after the flange and weld tubes of an equal diameter to them. Now for the plenum you take the volume of a cylinder and multiply it by 4, and theres how big your plenum has to be. Make it a free flowing design and there ya go.

Is it really that simple? Whenever I look at custom intakes thats all i can think of.

AndyAndy

[visualpoet]

Tell me if I am wrong, to make an intake manifold, you cut the runners a little after the flange and weld tubes of an equal diameter to them. Now for the plenum you take the volume of a cylinder and multiply it by 4, and theres how big your plenum has to be. Make it a free flowing design and there ya go.

Is it really that simple? Whenever I look at custom intakes thats all i can think of.

AndyAndy

Well, it seems like you'll need some vacuum ports, mounting places for the throttle body and a couple of other items, but you've got the basics. I think you could make the UP a little bigger without it being too detrimental to performance. You could also make your own flange out of 3/8 - 1/2 inch plate. Or go straight to ITBs.

[rexload]

sounds interesting,
any pictures of custom Honda intake manifolds?

EDIT: found a pic



And here is a cleaner one



What the advantage of having an IM like that? Bigger plenum?

[CB7lx91]

exactly what i was talking about.

the only real benefit is that you made it, it's cheaper, you know its durability and all its specs...i dunno, just is really easy it seams so why not.

Yeah I need to make a throttle body plate and tap some holes for my vacuum lines. You could even tap them like in the back so you don't see friggen lines everywhere.

hell you could buy a friggen big ass throttle body from any car and slap that on there as well.