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 Post subject: disa manifold
PostPosted: Tue Sep 24, 2019 8:21 am 
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hi alex or anyone thats reading :)
Looking at this thread viewtopic.php?f=28&t=7508 , i sold my mini and now have a e82 with the n52 NA engine it has a disa valve inlet manifold im pretty sure the same as the z4 (could be wrong) so my question do i have to go direct port or can i do the easier single crossfire throttle body pipe ;)
cheers ted

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Last edited by teddybare on Tue Sep 24, 2019 1:11 pm, edited 1 time in total.

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 Post subject: Re: disa manifold
PostPosted: Tue Sep 24, 2019 12:26 pm 
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i just found this quote ... the DISA's main effect is on intake harmonics..which is only really present at low RPM. at high RPM, and with a turbo, the DISA's benefit is minimal to non-existent due to forced induction not really giving a damn about harmonics when it comes to intake runner design(hence why you then run an open plenum)..it at that point is all about air volume and velocity.

so im hoping i can get away without direct port :beatstick:

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 Post subject: Re: disa manifold
PostPosted: Wed Sep 25, 2019 1:24 pm 
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right in case anyone was wondering just spoken to trev and i can use throttle body set up :compress:
soooooo quiet here :D

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 Post subject: Re: disa manifold
PostPosted: Wed Sep 25, 2019 9:59 pm 
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I checked the forum yesterday and your post wasn't made yet lol. For a low dose, a single crossfire would do OK. Probably 75 progressive or so. Higher doses would need a pro series (3 pair pulsoid) or D-block setup.

I'm working on my own I6 project using twin crossfires for a low dose up to 150 BHP and later on a Pro Series Triple Pair Pulsoid setup for a much bigger nitrous dose.


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 Post subject: Re: disa manifold
PostPosted: Thu Sep 26, 2019 1:01 pm 
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im well happy i can do the simple set up.... 8)

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 Post subject: Re: disa manifold
PostPosted: Thu Sep 26, 2019 7:24 pm 
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:yes:


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 Post subject: Re: disa manifold
PostPosted: Thu Sep 26, 2019 7:59 pm 
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oh alex forgot to ask
Back in my mini thread i got a 4an adapter for the fuel rail...do you think i will touch lucky that the n52 rail will be the same :rolleyes:

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 Post subject: Re: disa manifold
PostPosted: Fri Sep 27, 2019 3:03 am 
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I haven’t the slightest idea about that. Im sure you can exchange it for the appropriate adapter if need be.


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 Post subject: Re: disa manifold
PostPosted: Fri Sep 27, 2019 7:42 am 
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ok ;)

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 Post subject: Re: disa manifold
PostPosted: Sun Oct 06, 2019 2:15 pm 
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i've made a start :)

https://ibb.co/Z8mvnt1
https://ibb.co/P1Nb8tN
https://ibb.co/vd9cx3v
https://ibb.co/WkgftyB

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 Post subject: Re: disa manifold
PostPosted: Sun Oct 06, 2019 8:15 pm 
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Nice! The short pipe work is gonna have an instant response. :yes:


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 Post subject: Re: disa manifold
PostPosted: Mon Oct 07, 2019 8:17 am 
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shortest pipe i've ever made alex :D

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 Post subject: Re: disa manifold
PostPosted: Mon Oct 07, 2019 8:09 pm 
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I looked and the manifold again and it may be an additional benefit to angle the crossfire about 45* - 65* to create the vortex and mix the N/F more effectively. Plus it will remove a lot of the momentum of the plume so that the mix is more likely to change direction when it gets to the back of the TB opening. The manifold is going to force the mix to change direction by 180* towards either side and then it has to travel upwards, so angling the crossfire is what I would do.

More so, it will smooth out the pulses from the minimax further reducing the amount of engine stress below that of NA than the system already would! :yes:

https://www.youtube.com/watch?v=RoJT8I6h6oE

Skip to 3:45
Pay attention to the 45* angle test and you'll see where I'm getting at.


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 Post subject: Re: disa manifold
PostPosted: Mon Oct 07, 2019 8:26 pm 
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You'll be happy to know that if you wanted more than 75 bhp, there is the option to use a y-block and 2 crossfires in the plenum tubes (since they split evenly to feed 3 cyls at a time). This will give you the distribution and reduce the chances of fuel dropout for a higher nitrous dose!

It's certainly much less expensive and less complex than a direct port.

Attachment:
disa spray.jpg
disa spray.jpg [ 59.18 KiB | Viewed 130 times ]


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 Post subject: Re: disa manifold
PostPosted: Mon Oct 07, 2019 10:36 pm 
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many thanks for the insight alex ... 8)

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