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EF/EL Intake Plemum Butterflies 

 

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 Post subject: EF/EL Intake Plemum Butterflies
Posted: Fri Feb 18, 2011 9:25 pm 
Getting Side Ways
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Ride: BA XT, NCII V8

Location: Adelaide
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Hey guys

Im doing some work to my intake plemum atm mainly just sanding it and polish,

i was wondering on the bottom half of the plemum there is 6 butterflies that open when on hard throttle to allow more air into the motor,

now my feelings are is that they should be open all the time as i think more air is better.

While i have them out i was wondering if its worth putting them back in or just leaving it so the car gets more air??

any thoughts please
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 Post subject: Re: EF/EL Intake Plemum Butterflies
Posted: Fri Feb 18, 2011 9:39 pm 
Getting Side Ways
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it's not to let more in.
long narrow runners premote good cylinder filling at lower RPM.
short runner premote cylinder filling at higer RPM.
the changer over point is about 3800rpm, it has nothing to do with throttle position.

leave them in.

 

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 Post subject: Re: EF/EL Intake Plemum Butterflies
Posted: Fri Feb 18, 2011 10:44 pm 
Tyre Shredder
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Joined: 12th Jun 2010

Ride: EL Fairmont

Location: Central Highlands
QLD, Australia

wtbdlltd wrote:
Hey guys

Im doing some work to my intake plemum atm mainly just sanding it and polish,

i was wondering on the bottom half of the plemum there is 6 butterflies that open when on hard throttle to allow more air into the motor,

now my feelings are is that they should be open all the time as i think more air is better.

While i have them out i was wondering if its worth putting them back in or just leaving it so the car gets more air??

any thoughts please



Pull the vacuum hose of the BBM actuator and drive the car and you will soon realise the BBM is s**t hot/..for low down power..........

 

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 Post subject: Re: EF/EL Intake Plemum Butterflies
Posted: Fri Feb 18, 2011 11:10 pm 
Getting Side Ways
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Age: 29

Posts: 546

Joined: 5th Jun 2010

Ride: BA XT, NCII V8

Location: Adelaide
SA, Australia

thanks guys

i can feel the power diff when i hit about 3200rpm on full throttle its like 10kw+ extra easy was hoping to get that power all the time lol
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 Post subject: Re: EF/EL Intake Plemum Butterflies
Posted: Sat Feb 19, 2011 12:23 am 
Getting Side Ways
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Yep, not quite as good as vtec though...

 

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AU,factory fitted tickford kit/IRS, t5,Sports ryder/KYB: gone.

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 Post subject: Re: EF/EL Intake Plemum Butterflies
Posted: Sat Feb 19, 2011 3:44 am 
Stock as a Rock
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Location: hobart
TAS, Australia

wtbdlltd wrote:
thanks guys

i can feel the power diff when i hit about 3200rpm on full throttle its like 10kw+ extra easy was hoping to get that power all the time lol


Interesting, from what i thought i've seen on here a lot of people have reported from dyno runs that the power dips a bit after hitting the changeover point.
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 Post subject: Re: EF/EL Intake Plemum Butterflies
Posted: Sat Feb 19, 2011 4:42 am 
Tyre Shredder
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Joined: 12th Jun 2010

Ride: EL Fairmont

Location: Central Highlands
QLD, Australia

viper1431 wrote:
wtbdlltd wrote:
thanks guys

i can feel the power diff when i hit about 3200rpm on full throttle its like 10kw+ extra easy was hoping to get that power all the time lol


Interesting, from what i thought i've seen on here a lot of people have reported from dyno runs that the power dips a bit after hitting the changeover point.


Turbo models have butterflies removed---forced induction...

 

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