el intake manifold on ebII

[Commando]

I sense a lot of love missing from this thread

[galapogos01]

the BBM turns the caterpillars into butterflies depending on intake temperature. it takes approx 6 weeks for a butterfly to fully mature.

as said above, the ecu needs to connect to the knee bone, which is on the back of the block near the knock sensor. you can drop an AU engine straight in, just watch you dont dint your quarter panels.

[five point slow]

I sense an epic fail coming on.

I think two people had an epic fail about 19 years ago.

[burnt turtle]

ok so because im such a retard can someone explain in complete how the butterfly's are moved, including vacuum and electrical.
i thought you guys might give me a better understanding of this becuase i dont really understand it all, i only understand how the bits you'v sed work not all at once.

[five point slow]

Dashpot. Solenoid. Google.

[Dansedgli]

There is a vacuum switch.

Vacuum goes in 1 side and out the other via a flap. The flap is electronically controlled by the ECU.

Flap closed means no vacuum gets to the other side of the switch.

Flap open means vacuum gets through.

The electronic signal opens and closes the flap. The flap lets vacuum through. The vacuum moves the BBM switch which moves the butterflies which creates a hurricane in south west india.

[burnt turtle]

so why does the ecu need to tell it wen to open? why isnt it just operated by vacuum only?
and will the butterfly's still operate if its not connected to the ecu?

[Dansedgli]

You have to be joking.

http://www.vicfords.com

[five point slow]

so why does the ecu need to tell it wen to open? why isnt it just operated by vacuum only?

Because.

[Commando]

Because if it were operated purely by vacuum, you'd have the BBM switch activate at the most retarded of times, like WOT at idle...

The whole point of the BBM is to optimise delivery throughout the rev range. Longer runners for more torque down low. Then it switches to shorter runners for more power up high.

That's the extremely oversimplified description of it.

[[Sterling]]

There is a vacuum switch.

Vacuum goes in 1 side and out the other via a flap. The flap is electronically controlled by the ECU.

Flap closed means no vacuum gets to the other side of the switch.

Flap open means vacuum gets through.

The electronic signal opens and closes the flap. The flap lets vacuum through. The vacuum moves the BBM switch which moves the butterflies which creates a hurricane in south west india.

i got NFI what this thread is about, but i did manage to undersand that.

[burnt turtle]

ok
so if i connect it all up with my eb ecu it'll run but the butterflies wont be moving at the write time?

[five point slow]

They won't be moving at all, defeating the whole point of the swap.

[burnt turtle]

they will be open wont they?

[Dansedgli]

[five point slow]

they will be open wont they?

Not if you close them.

[Commando]

The EL ECU is needed BECAUSE it dictates to the BBM when to open/close. EB ECU does not know of BBM, so it won't be telling it anything. If you keep your EB ECU, do what OED said at the start of the thread by mimicking the signal at approx 3800rpm (with a jaycar shiftlight circuit) to activate the switch...

[burnt turtle]

well i understand that the eb ecu dosnt know of the bbm. i knew that at the start.
by the way the point of the swap was to have an engine with lower k's on it in my car.
the butterflies will be held on the "high rpm" position because of a spring (i understand that bit) if i dont connect the it to the ecu.

[five point slow]

Which means you might as well use the old manifold.

[burnt turtle]

but as soon as i can i will wire up the bbm and then thats were it'll be different.

[Commando]

k?

[glenneaux]

ROFL!

best ever


burnt turtle; go play with an el and learn how that stupid bbm works. this thread should be locked.

[burnt turtle]

yeh i am its the only way for me to completely understand.
im not good at reading or writing.