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Twin throttle body 

 

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 Post subject: Twin throttle body
Posted: Wed May 07, 2014 7:21 pm 
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I'm posting this in the garage section because I think it's the right spot for it considering it's general talk about many applications.

Iv been looking at a few threads about dual throttle body's on I6's. The idea I kinda get outa it is that down low there no good? But up in the rev range they come into play when having higher power. So... I was thinking having 2 standard body's on a bbm. The first throttle body would be connected the conventional way ( of older cars) by a accelerator cable and the second being driven by a servo. My idea is once the throttle/ rpm gets to a certain point the second body comes in play. Effectively it could be "tuned" because it's electronic hell arduinos are really cheap.

If anyone with a bit more understanding about this could "chime in" and provide more knowledge on the subject. One more thing to ad is that I'm picking up a spare bbm on Friday and a project like this could be in the makings, iv been thinking about it for a while now.

Cheers,
Fullyforded (chris )

 

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 Post subject: Re: Twin throttle body
Posted: Wed May 07, 2014 7:37 pm 
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The Garage is only for build threads. Thread moved to more appropiate section for you.

 

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 Post subject: Re: Twin throttle body
Posted: Wed May 07, 2014 8:08 pm 
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93EB wrote:
The Garage is only for build threads. Thread moved to more appropiate section for you.


Sorry and cheers.

 

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 Post subject: Re: Twin throttle body
Posted: Wed May 07, 2014 8:11 pm 
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A couple of people have done it to E-series over the years.
Not sure any have done what you're suggesting with a servo, but it has been done before on other cars with linkages.

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 12:41 am 
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I think when I buy it I'll see how much I can mill off to fit another throttle body. There pretty pricey on eBay so I might just turn one up, at the end of the day I wanna try it but my car is stock everything and I prob won't notice it.

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 2:51 am 
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Ive seen a twin throttle body floating around here for inline 6. Quite sure it was a flipped log manifold from an ea-ed and twin xf throttle bodies were used. I recall xcabbi being the owner at 1 point.

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 8:06 am 
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Yeah I still have it. When I bought it I was promised it had 76mm XF throttles on it but when I picked it up they were replaced with E series throttles. At the moment it's just sitting there waiting to be used. I'll get around to doing something with it eventually.
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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 10:00 am 
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xcabbi wrote:
Yeah I still have it. When I bought it I was promised it had 76mm XF throttles on it but when I picked it up they were replaced with E series throttles. At the moment it's just sitting there waiting to be used. I'll get around to doing something with it eventually.


Don't suppose you could upload a picture?

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 1:22 pm 
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fullyforded wrote:
xcabbi wrote:
Yeah I still have it. When I bought it I was promised it had 76mm XF throttles on it but when I picked it up they were replaced with E series throttles. At the moment it's just sitting there waiting to be used. I'll get around to doing something with it eventually.


Don't suppose you could upload a picture?

good ol google
Attachment:
image.php.jpg

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 1:48 pm 
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bry40l wrote:
fullyforded wrote:
xcabbi wrote:
Yeah I still have it. When I bought it I was promised it had 76mm XF throttles on it but when I picked it up they were replaced with E series throttles. At the moment it's just sitting there waiting to be used. I'll get around to doing something with it eventually.


Don't suppose you could upload a picture?

good ol google
Attachment:
image.php.jpg


Cheers man, it would be cool to put it on set a throttle limit to 50% and have a really touchy throttle!
This has given my many ideas. Cheers

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 2:00 pm 
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id personally set one throttle to open first to say 30% before the second one came on, so it would be as a normal car under normal driving,

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 2:41 pm 
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bry40l wrote:
id personally set one throttle to open first to say 30% before the second one came on, so it would be as a normal car under normal driving,


That was the idea of having one electronically controlled. That way it could open up whenever. I wonder if I make it if it would have any positive affects on a stock motor... I guess only one way to find out, I can't wait till I get this second manifold... So many things to try!

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 4:20 pm 
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fullyforded wrote:
bry40l wrote:
id personally set one throttle to open first to say 30% before the second one came on, so it would be as a normal car under normal driving,


That was the idea of having one electronically controlled. That way it could open up whenever. I wonder if I make it if it would have any positive affects on a stock motor... I guess only one way to find out, I can't wait till I get this second manifold... So many things to try!

it will need a tune to get the correct a/f ratios. even better if you had a cam and head job done :D

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 4:47 pm 
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bry40l wrote:
fullyforded wrote:
bry40l wrote:
id personally set one throttle to open first to say 30% before the second one came on, so it would be as a normal car under normal driving,


That was the idea of having one electronically controlled. That way it could open up whenever. I wonder if I make it if it would have any positive affects on a stock motor... I guess only one way to find out, I can't wait till I get this second manifold... So many things to try!

it will need a tune to get the correct a/f ratios. even better if you had a cam and head job done :D


I'm so keen to get a cam, I'm planning on rebuild my motor or getting a company to rebuild the lower half and then get head work done. I'm currently saving for a full exhaust system then after that I'll start saving for the engine to get done. I'll hopefully have it rebuilt by the end of the year.

 

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 Post subject: Re: Twin throttle body
Posted: Thu May 08, 2014 6:28 pm 
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Staged throttle openings would be a pain in the a*** on that thing, not to mention there being a real possibility of half of your cylinders running quite lean/rich.
The way I was going to use it was in a turbo application with a top mount water to air cooler that has a single inlet for the turbo and twin outlets for the intake manifold. Hopeless for the street (it would be too touchy) but an absolute weapon for the strip.
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