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perfomance throttle body 

 

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 Post subject: perfomance throttle body
Posted: Sun Sep 25, 2011 9:02 pm 
Smokin em up
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Age: 30

Posts: 250

Joined: 18th Apr 2009

Ride: ba mk2 xr8

Location: nyngan
NSW, Australia

hi guys is it worth getting one of the ebay throttle bodies will it make much difference i have a wade 1673 cam/ head shave port polish / vrs race head gaskets / redback excractors / redback 2 1/2 exhaust / venom high flow cat / and a j3 with a custom tune for my mods / and a pod in air box.
what do you guys think
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 Post subject: Re: perfomance throttle body
Posted: Sun Sep 25, 2011 9:07 pm 
Getting Side Ways
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Joined: 30th Aug 2010

Ride: BF XR6,

Location: NEWCASTLE
NSW, Australia

if you do a search you will find people argueing over losing power on the dyno swapping to a bigger throttle body on the 4.0l or gaining, personally i think the standard one is capable of giving your engine enough air with a 1673 cam, if it was a definate power increase by changing it im sure every second car on here if not all cars on this forum would have bigger throttlebodys

 

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BF XR6
xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto

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 Post subject: Re: perfomance throttle body
Posted: Sun Sep 25, 2011 9:09 pm 
Stock as a Rock
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Location: Ballarat
VIC, Australia

how much are they worth? you would have to have bigger intake piping
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 Post subject: Re: perfomance throttle body
Posted: Sun Sep 25, 2011 9:11 pm 
Smokin em up
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Age: 30

Posts: 250

Joined: 18th Apr 2009

Ride: ba mk2 xr8

Location: nyngan
NSW, Australia

should i just polish the in side of my existing one and in my intake manafold while im at it
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 Post subject: Re: perfomance throttle body
Posted: Sun Sep 25, 2011 9:12 pm 
Stock as a Rock
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Age: 25

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Ride: Ford Falcon EA

Location: Ballarat
VIC, Australia

spinner1987 wrote:
should i just polish the in side of my existing one and in my intake manafold while im at it



get it power ported
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 Post subject: Re: perfomance throttle body
Posted: Sun Sep 25, 2011 9:13 pm 
Smokin em up
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Age: 30

Posts: 250

Joined: 18th Apr 2009

Ride: ba mk2 xr8

Location: nyngan
NSW, Australia

the out side is the same its the inside of them thats bigger and about $250
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 Post subject: Re: perfomance throttle body
Posted: Sun Sep 25, 2011 9:18 pm 
Getting Side Ways
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Ride: BF XR6,

Location: NEWCASTLE
NSW, Australia

EA-SPAC-88 wrote:
how much are they worth? you would have to have bigger intake piping

they are just a standard throttle body and they just machine them out bigger on the inside,

 

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BF XR6
xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto

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 Post subject: Re: perfomance throttle body
Posted: Mon Sep 26, 2011 12:00 am 
Getting Side Ways
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Ride: Turbo EL

Location: Melbourne
VIC, Australia

You could give it a shot dude, I was looking into them myself. Some people say they work wonders others think not.
It all depends on what mods you have and if the extra volume will do you any justice for it's price.

I gave mine a little polish back and also just the spindle in half.
Here is the link:
http://www.fordmods.com/ford-4l-and-6-cylinder-f1/69mm-throttle-body-need-more-dyno-tuning-t106006.html

Then there is the original doco from KWIKXR
http://www.fordmods.com/fordmods-technical-documents-diy-f38/improving-your-6cyl-e-series-throttlebody-the-diy-way-t84040.html

And with the home made mod to the butterfly some maths done by tickford_6
All are worked out based on an 8mm shaft.

Stock 65mm tb has an area of 2798mm squared
stock 65mm tb with half shaft mod has an area of 3058mm squared
70mm tb with full 8mm shaft has an area of 3288mm squared
70mm tb with half shaft has an area of 3568mm squared.

 

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