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BBM and boost 

 

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 Post subject: BBM and boost
Posted: Wed Aug 29, 2007 11:22 am 
Getting Side Ways
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should i not use the butterflies on my bbm manifold when i turbo,or does it not change much?
cheers

 

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Posted: Wed Aug 29, 2007 2:06 pm 
Smokin em up
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try it and satisfy yourself. i have been in a boosted car with them held one way and then the other. You can notice the difference. This just represents a seat-of-the-pants opinion and verifying it on a dyno would be alot more accurate.

Removing them all together looks bad for low-rpm performance in my worthless opinion.

Easy enough to activate them with either an rpm switch or a hobbs switch.

As i said, its up to you.

 

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Posted: Wed Aug 29, 2007 4:12 pm 
Getting Side Ways
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cool thanks

 

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97 el xr6,5 speed short shifter,sequential scoop,no arial,freshly resprayed,low on 17's,3 inch zorst,stainless hi flo cat,snort stage 3 stainless manifold,garrett t04e,front mount cooler,wolf 3d ecu,seimens 760cc injectors,walbro fuel pump

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Posted: Wed Aug 29, 2007 4:25 pm 
Getting Side Ways
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Age: 34

Posts: 10826

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Ride: BF MK11 XR 6 TURBO ZF 6spd

Power: 225 rwkw

Location: glenwood/sydney
NSW, Australia

aaron_hogan wrote:
try it and satisfy yourself. i have been in a boosted car with them held one way and then the other. You can notice the difference. This just represents a seat-of-the-pants opinion and verifying it on a dyno would be alot more accurate.

Removing them all together looks bad for low-rpm performance in my worthless opinion.

Easy enough to activate them with either an rpm switch or a hobbs switch.

As i said, its up to you.


your point of removing them??????

BA/BF XR TURBO BBM manifolds DO NOT have the butterfly's from the factory..

 

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Posted: Wed Aug 29, 2007 4:42 pm 
Getting Side Ways
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That only means they dont prove to be a benefit on a BA motor.

They will still encourage low down torque which will help spool a turbo.
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Posted: Wed Aug 29, 2007 5:00 pm 
Getting Side Ways
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ill run with them and see how it goes,cant be too much of a problem

 

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97 el xr6,5 speed short shifter,sequential scoop,no arial,freshly resprayed,low on 17's,3 inch zorst,stainless hi flo cat,snort stage 3 stainless manifold,garrett t04e,front mount cooler,wolf 3d ecu,seimens 760cc injectors,walbro fuel pump

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Posted: Wed Aug 29, 2007 10:25 pm 
Parts Gopher
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i took myn out.....to much retriction up top...the 4L is a big motor ...has no trouble spooling up a turbo ...yeah theres a bit of lag there but stuff all compared to smaller engines which may benifit from using a bbm type intake on them.
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