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Bbm or log manifold? Eb turbo 

 

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 Post subject: Bbm or log manifold? Eb turbo
Posted: Mon Jun 16, 2014 7:08 am 
Oompa Loompa
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Age: 31

Posts: 49

Joined: 1st Apr 2011

Gallery: 8 images

Ride: Eb II XR6

Location: kalgoorlie
WA, Australia

Hi guys, I've almost got my turbo kit installed into my eb and was wondering which manifold is "better".
Currently I have the bbm on as I converted the engine to el specs before I got the turbo kit and just to be easy I've hooked up the piping to it. I'm wondering if it's worth going back to the log manifold. The intercooler is inverted with the piping going just under the headlights and with the log manifold it will shorten the piping significantly. The only reason I didn't change it over before is because I'd have to source an xh idler and new accelerator cable.
What I really want to know is will it make a difference to change it?

 

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EBII SXR6 White, manual, el dash and door trims, ba xr front seats, serpentine belt, electric fans and a turbo
http://www.fordmods.com/the-garage-f53/just-another-white-eb-t114629.html

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 Post subject: Re: Bbm or log manifold? Eb turbo
Posted: Mon Jun 16, 2014 8:10 pm 
Technical Contributor
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Age: 60

Posts: 6817

Joined: 22nd Jun 2005

Gallery: 8 images

Ride: EF Fairmont

Location: Campbelltown
NSW, Australia

Use the Log for the Turbo, better suited for boost than the BBM.
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 Post subject: Re: Bbm or log manifold? Eb turbo
Posted: Fri Jun 27, 2014 2:48 am 
Getting Side Ways
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Age: 64

Posts: 3552

Joined: 7th Nov 2004

Gallery: 4 images

Power: 482 rwkw

Location: Penrith
NSW, Australia

On the BA turbo they run the BBM with short runner .. The butterflies where removed..
I would as said go the longer log style manifold..

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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 Post subject: Re: Bbm or log manifold? Eb turbo
Posted: Fri Jun 27, 2014 2:39 pm 
Getting Side Ways
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Age: 21

Posts: 462

Joined: 24th Jun 2013

Gallery: 3 images

Ride: Ford Fairlane na2

Location: Launceston
TAS, Australia

I was going to convert my na2 to bbm then did some research and found that my log manifold is better for turbo and supercharged applications.

 

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NA2 fairlane - 3.9 with au headgasket & injectors, ef fans, 2.5" zorst, lowered on selby springs , kenwood head unit and 6 speakers, fusion sub, el ecu & ti chip

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 Post subject: Re: Bbm or log manifold? Eb turbo
Posted: Fri Jun 27, 2014 3:37 pm 
Moderator
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Posts: 14513

Joined: 7th Nov 2004

Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

I ran mine with the bbm and kept the bbm operational, it still had more down low torque and throttle response over having the bbm guttered.
you could tune around it I guess, but I found it much better to drive off boost with the bbm working.

even more so with the centrifugal supercharger...
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 Post subject: Re: Bbm or log manifold? Eb turbo
Posted: Mon Jul 14, 2014 11:32 pm 
Getting Side Ways
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Age: 64

Posts: 3552

Joined: 7th Nov 2004

Gallery: 4 images

Power: 482 rwkw

Location: Penrith
NSW, Australia

Check that vacuum is open BBM and closes again on boost ??

 

_________________

As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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