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EF xr6 Throttle body swap with BAXR6T 

 

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 Post subject: EF xr6 Throttle body swap with BAXR6T
Posted: Wed Oct 04, 2006 7:29 pm 
Oompa Loompa
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I have a 72mm Butterfly TB available from a BAXR6T, I was wondering if it would make my EF breathe better, as mine is approx 65mm
Now for the hard part
1st:
Is it possible?
2nd:
Is it worth it?
3rd
What modifications are needed for Cable Throttle linkage and TPS etc.
4th:
Do I just have a go and tell all of what I learn.

 

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Posted: Wed Oct 04, 2006 8:37 pm 
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Yeah its possible anything can be made to fit, and na its prob not worth it,

 

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Posted: Wed Oct 04, 2006 8:44 pm 
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I6 throttles are big as is, no need fit a larger one.

Besides, your intake manifold only has a T/B port of 68mm, designed for the original. Now if you put a 72mm T/B on, thats all good, but the airflow will still hit a 68mm port once through the T/B.

 

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Posted: Wed Oct 04, 2006 9:09 pm 
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BA throttle bodies are drive-by-wire (i.e. they dont have a throttle cable). It wont be easy to fit and there are little to no gains.

 

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Posted: Sat Nov 04, 2006 4:22 pm 
Oompa Loompa
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I have bought the BA Turbo Throttle body, going to machine out my existing one and fit this ones butterfly in it's place.
I just got to check shaft size and bolt placement, if it is all sweet I will get it done pronto.

 

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Posted: Sat Nov 04, 2006 5:40 pm 
Getting Side Ways
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you can only machine e-series/au throttle bodies out to about 68mm. After that the walls get too thin.

 

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Posted: Sat Nov 04, 2006 7:56 pm 
Oompa Loompa
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So it looks like that idea is out the window, I will see what I can do with the BA one then ...

 

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Posted: Sat Nov 04, 2006 8:51 pm 
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Why are you so keen to mod the throttle body? As already said the I6 one is HUGE for the size of the engine (e-series I6 are bigger than the v8's). Nobody has ever got so much as 1rwkw more by fitting a larger throttlebody (and many including myself have tried).

 

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Posted: Sun Nov 05, 2006 6:26 am 
Oompa Loompa
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Ok you got me, :shock: I thought that they fit 90mm Throttle bodies onto the V8's which showed an improvement for them, so I thought well what is good for the 8 may work for the 6. I was planning on modifying the plenum to take advantage of the bigger butterfly too :wink: .
But If there is no benefit anyone want a BA Turbo T/B unmodified....

 

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Posted: Mon Nov 06, 2006 3:33 pm 
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68mm is enough to make 180RWKW on a I6 falcon - been there and done that.


bigmat wrote:
Ok you got me, :shock: I thought that they fit 90mm Throttle bodies onto the V8's which showed an improvement for them, so I thought well what is good for the 8 may work for the 6. I was planning on modifying the plenum to take advantage of the bigger butterfly too :wink: .
But If there is no benefit anyone want a BA Turbo T/B unmodified....

 

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Posted: Mon Nov 06, 2006 4:17 pm 
Oompa Loompa
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[quote="Waggin"]68mm is enough to make 180RWKW on a I6 falcon - been there and done that.


So where did you get to. and what did you do to get there. 180 RWKW is a limit I wouldn't mind passing, 220 + sounds nice....

 

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Posted: Mon Nov 06, 2006 4:22 pm 
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bigmat wrote:
So where did you get to. and what did you do to get there. 180 RWKW is a limit I wouldn't mind passing, 220 + sounds nice....


Try to get to 180 first :lol:

220 isnt possible without forced induction, NOS, or methanol

 

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Posted: Mon Nov 06, 2006 4:42 pm 
Oompa Loompa
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Ride: XR6 EF

Power: 367 rwkw

Location: Gisborne
New Zealand

You have a point, but I am quick running out of changes to make some horsepower from Naturally Aspirated anyways (without upping the compression (which will be hopeless for forced induction ,and/or doing some serious massaging on the head)
With the bigger throttle body I have got, if I later turboed it what harm can it do.
I am trying to look at this from the end point in mind. apart from extractors and cam already fitted which will have to change anyways... but I have to make incremental improvements anyways just too keep my sanity and keep that smile on my dial everytime I hit the loud peddle.
:D

What are your suggestions

 

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