what is a butterfly?

[jepree]

i hear you guys talkin bout it all the time and im not the gearhead you guys are and i was just wondering if you guys could help?

[dkdeleon68]

this will show u.they are in the intake and they are controled by the swerl control valve and vacuum

[dkdeleon68]

and another pic

[uncle_louie83]

hehe...i removed mine...idle is ok i guess...but id keep them in...cause there is a low end power loss...like under 3700 rpms you can feel the difference....once u hit 4k your fine...but id keep them if i was you.

lewis

[jepree]

awesome thanks guys!

[s1ndicate]

sorry had to do it Surprised no one else has done it, but they nailed it on the head.

[NismoGreg]

Automatic ka's dont even have butterfies in the intake mani

[Checkered-Member]

and another pic

Actually those are secondary butterflies, the primary butterfly is the throttle body plate

Automatic ka's dont even have butterfies in the intake mani

I’m an auto KA, and I have one of those nifty air restrictor thingies

[InsanityInc]

Are the secondary butterflies default open or closed?

[Checkered-Member]

Are the secondary butterflies default open or closed?

From my understanding, they are angled at low rpm then open wide at higher rpms, it has to do with accelerating the air into the engine at low rpms to produce more torque

on a hot day with A/C i can feel them open up around 4K

[EstoMax]

ok bringing this out of the dead but im about to put an s13 motor in my s14 cause i blew my rod bearing, and im using the s14 distributor, exhaust mani, but leaving the s13 intake..

now the secondary butterflies, am i going to be able to hook their vacuum up and do they even have a vacuum port somewhere that has to be hooked up? or is it part of the motor (hopefully not unplugged by previous owner then)

tnxMarko

[deviousKA]

The secondary butterflies are pulled closed by vacuum. If their control pot vacuum line was disconnected they would stay open all the time.