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Old 12-02-2002, 04:51 AM   #1
danci1973
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Lightbulb Twin Throttle Body

Has anyone ever tried (or thought of) using two throttle bodies - one for each half of the engine??

It seems possible, placing the TBs over the heads, facing each other. This would require new runners (or intake 'half manifolds' ) and some new intake piping. One TB could do without TPS, which could in turn be used to connect both throttle plates together.

Here is a sketch of what I have in mind:



Notice how short those runners could come out...

Comments, please...

Thx, D.
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Old 12-02-2002, 05:26 AM   #2
HndaTch627
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good luck designing a likage that will work with both throttle bodies and you will need to get a stand alone system in order to properly tune the motor since you have just theoretically completely changed the air metering system.

jeremy
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Old 12-02-2002, 05:59 AM   #3
danci1973
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Quote:
Originally posted by HndaTch627
good luck designing a likage that will work with both throttle bodies
So far, making new runners seems to be the hardest part, together with getting a cheap/free spare TB.

Linkage doesn't seem all that complicated - by removing the TPS on one TB I would get a rotating axle which could be used for linking to the other TB.


Quote:
and you will need to get a stand alone system in order to properly tune the motor since you have just theoretically completely changed the air metering system.
Are you sure? My car has a MAF, which would still be at the end of the intake, so all the air would still flow through it.

If I get a second TB and someone to make new runners (or 'half-manifolds' ), I'll try it out.

D.
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Old 12-02-2002, 09:28 AM   #4
Legacy777
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Sounds like a hell of a lot of work for no real particular reason other then just doing it..........cool.

In all honesty......I wouldn't waste your time or money....if you were looking at doing this for performance gains......there's much cheaper means of getting more hp then what this would do.

I'd probably compare this to some of the older rods with triple deuce carbs..... Sure they can crank out the hp, but are an incredible pain to tune, and always have some sort of issue or problem.
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Old 12-02-2002, 11:13 AM   #5
danci1973
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Quote:
Originally posted by legacy777
Sounds like a hell of a lot of work for no real particular reason other then just doing it..........cool.

In all honesty......I wouldn't waste your time or money....if you were looking at doing this for performance gains......there's much cheaper means of getting more hp then what this would do.

I'd probably compare this to some of the older rods with triple deuce carbs..... Sure they can crank out the hp, but are an incredible pain to tune, and always have some sort of issue or problem.
Considering all the talk about how bad the stock manifold is, I thought it was a good idea... Dang...


D.
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Old 12-02-2002, 11:37 AM   #6
HndaTch627
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Quote:
Originally posted by danci1973


Considering all the talk about how bad the stock manifold is, I thought it was a good idea... Dang...


D.
why does everyone think the stock manifold is so bad?? i mean it's not all that restrictive, sure it needs a lil bit of positive pressure but you will never net gains off a NA manifold like people seem to think. a very mild port job would increase the airflow quite a bit. anyhow good luck if you do it, i wouldn't though.

jeremy
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Old 12-02-2002, 06:35 PM   #7
guitaro
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yea it would run lean if both throttle bodies did not have Mass airflow sensors on both intakes. It might work if you had Manifold absolute pressure (MAP) sensors.
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Old 12-02-2002, 06:57 PM   #8
jasona
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i would do it if i were you, just because it would be cool.
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