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Custom intake manifold idea 

 

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 Post subject: Custom intake manifold idea
Posted: Tue Oct 25, 2011 5:52 pm 
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i have been thinking about the design of the intake, in particular the intake manifold, and have come to the conclusion that i have no idea why it is the way it is.
A lot of people are chasing a less restrictive CAI, so my thought was to mirror the intake maifold so that the throttle body points outward instead of inward over the injectors.

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i have two ideas for doing this (i have not looked into the details of either of these):
1 - weld up all the mounting holes, and redrill them to line up when turned around 180 degrees (**i have NO idea if this will work - so if it sounds stupid, its cause it probably is)
2 - i work at a place that has a foundry, so i was thinking of getting an intake custom cast out of scrap intakes. then getting it all machined up... will mean a bit more money and a lot more work but.

i know both these ideas will also need some other things done apart from the obvious modifications to the manifold, eg - extended throttle cable, possible extension on electrical connections, etc.

Can someone tell me why this wouldnt work/why someone hasnt done this before or if someone has, can you point me in the direction of who has?


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 Post subject: Re: Custom intake manifold idea
Posted: Tue Oct 25, 2011 6:05 pm 
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not sure if their would really be enough performance difference to equal the money involved in making the TB face towards the airbox.

 

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 Post subject: Re: Custom intake manifold idea
Posted: Tue Oct 25, 2011 6:07 pm 
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it's been done
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 Post subject: Re: Custom intake manifold idea
Posted: Tue Oct 25, 2011 6:08 pm 
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ell if i get the upper half of the manifold custom cast, it would serve two purposes...
i would also custom the back end of it to allow for some more room up there, to allow for more room up there (custom alloy things etc).

but yeah i know it wouldnt make a HUGE difference, but how much would it make a difference/would it work?

 

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 Post subject: Re: Custom intake manifold idea
Posted: Tue Oct 25, 2011 6:10 pm 
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imo i cant see it making a lot of difference, the intake is fairly well balanced to start with.. but it is restrictive.
Make something up that'll incorporate individual throttle bodies with say 6 inch trumpets.

 

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 Post subject: Re: Custom intake manifold idea
Posted: Tue Oct 25, 2011 6:12 pm 
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It wont make any difference.

Not sure if you read above but its been done and that is only to reduce the amount of intake piping on a turbo setup.
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 Post subject: Re: Custom intake manifold idea
Posted: Tue Oct 25, 2011 6:32 pm 
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Dansedgli wrote:
It wont make any difference.

Not sure if you read above but its been done and that is only to reduce the amount of intake piping on a turbo setup.

+1 the ed has the throttle body at the front and you can also buy aftermarket inlet manifolds for turbo set ups that face the t/b to the front

 

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 Post subject: Re: Custom intake manifold idea
Posted: Tue Oct 25, 2011 8:06 pm 
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in that case, can someone point me in the right direction on where i can find one/read about one?

 

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 Post subject: Re: Custom intake manifold idea
Posted: Tue Oct 25, 2011 9:07 pm 
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Here's one company that makes them:

http://www.snortperformance.com/plenums.htm

 

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 Post subject: Re: Custom intake manifold idea
Posted: Wed Oct 26, 2011 6:54 am 
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There is a lengthy thread on this forum on a custom individual throttle bodies project (six TBs):
ford-4l-and-6-cylinder-f1/i6-individual-throttle-bodies-project-t87803.html

There a couple of twin TB concepts/projects here:
http://www.fordforums.com.au/showthread.php?t=11198531

And there is this twin TB a while ago on this forum:
ford-parts-for-sale-f17/fs-ea-au-twin-throttle-body-manifold-t83457.html

 

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 Post subject: Re: Custom intake manifold idea
Posted: Wed Oct 26, 2011 6:59 pm 
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I'm still pretty interested in making a custom manifold for aesthetic and space saving reasons... Plus would be a good first project... Something that has little chance of making the car worse/breaking the car... So yeah, if anyone in Brisbane has an upper manifold laying around or even the whole manifold, I would like to get my hands on one... Cheers

 

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 Post subject: Re: Custom intake manifold idea
Posted: Wed Oct 26, 2011 7:17 pm 
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i can tell you now that dual throttl body idea wouldnt be very hard with an upside down ed manifold if you know a good boily who can weld it up for you, and my mate made one for his vt a few years back and it made a big difference, altho getting so much air in the engine at low revs doesnt help

 

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 Post subject: Re: Custom intake manifold idea
Posted: Wed Oct 26, 2011 10:00 pm 
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Can it be done without stuffing around with the ecu?
I don't want to get involved with that sort of stuff...

 

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 Post subject: Re: Custom intake manifold idea
Posted: Fri Oct 28, 2011 12:26 pm 
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thats mine not hard to do . just need to be able to weld alloy ,i removed the isc and turned the t/b around welded up a bracket for the cable and used a bike cable for the new throttle cable.



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Last edited by TURBO_GHIA on Fri Oct 28, 2011 12:35 pm, edited 1 time in total.

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 Post subject: Re: Custom intake manifold idea
Posted: Fri Oct 28, 2011 12:32 pm 
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howd you go with the throttle cable with the throttle body going backwards, thats not a bad idea for boosted set up

 

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