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http://s4.zetaboards.com/lexusaltezzaclub/topic/1148393/1/#new



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Custom Intake Plenum; any ideas?
Topic Started: Mar 18 2012, 06:21 PM (1,230 Views)
tezznu
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hay guys js wondering i was going to build a custom intake plenum for the beams seeing as im a fabricator was wondering if you guys had any ideas or pointers?
if all goes well i could do them for cheap if we can get a good plan cheer
3sgte transpant for the win!
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yojimbo
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Hidden Dragon
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Make me one of these. Make it cheap. Be my BFF.


Posted Image
Toyota Nats 5 x Top Toyota
Toymods Dyno Day 19 - Killerwatt King
Supra Dyno Day 2015 Outright HP and Torque
11.10@141.34mph (0-400m)
22.048@164mph (0-1000m)

Built by ...
JMR Race Engineering - Toyota Specialist
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silverhelix
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Body-Kitted
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The answer is Helmholtz to your design question.
Above is an accurate picture of what an end product would look like.

And you will have many new best friends if you can make them on the cheap :P
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nz_climber
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What is wrong with the current one?
Building a Beams 3sge powered Mcgregor 7.

Check out progress (or lack of..) at http://www.lotus7.co.nz/forum/viewtopic.ph...957eb3663a85224
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yojimbo
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nz_climber,Mar 18 2012
07:00 PM
What is wrong with the current one?

it doesnt have billet runners and hydroformed plenum.
Toyota Nats 5 x Top Toyota
Toymods Dyno Day 19 - Killerwatt King
Supra Dyno Day 2015 Outright HP and Torque
11.10@141.34mph (0-400m)
22.048@164mph (0-1000m)

Built by ...
JMR Race Engineering - Toyota Specialist
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E910
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MOTUL 300V
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Something like this should do the trick
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Posted Image
アルテッツァ RS200-Z 6MT
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silverhelix
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^Wiping drool from mouth now..... :boink:
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cookie
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Funny thing, I had a hand in building both of those plenum's.
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tezznu
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E910 thats alongthe lines i was thinking i was going to use factory runnners and mani plate and form my own plenum shape do i make it to suit the oem throttle bodie or say a universal 80mm??

what about simalar to this??http://www.trademe.co.nz/motors/car-parts-accessories/performance/carburation-induction/auction-456994700.htm

i have access to a whole machine shop and sheetmetal/fab shop and havejust come out of my time as a fab apprentice so we could sort something out for you guys if your keen to throw some ideas round!!
3sgte transpant for the win!
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tezznu
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ps had my nice new manual worked gtt caldina parked at a mates on the street nek minnit some C&^T some screaming down the road in his integra like hes madd mike and writes it off!!!
3sgte transpant for the win!
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E910
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MOTUL 300V
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vtec just kicked in yo! :wacko:
アルテッツァ RS200-Z 6MT
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Higgsy
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Joining the wagon club
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E910,Mar 19 2012
11:38 AM
vtec just kicked in yo!  :wacko:

..........

....


hahahahahaha.

that made me laugh. perfectly said.
rofl rofl rofl


oh and sorry to hear about your caldina obviously.
from a beams ITB to a 2JZ
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Distrb
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Nuts
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What are the limitations of the stock inlet manifold on the 3sge?
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Tezz-Winnie
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I dont know but the stock one is huge and has a really good flow rate, much bigger then earlier 3SGTE's. I dont see the need to upgrade personaly...
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yojimbo
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Hidden Dragon
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Size is only half the equation with inlet dynamics on a FI application. Big volume is good because it can assist with balancing flow in the runners so that cylinder 1 gets the same as one of the middle cylinders (usually the greatest variation). Tumbling and vortices off the throttle butterfly along with other features of the design cause all sorts of high and low pressure areas inside the plenum, larger volume can balance this out.

Lots of testing and refinement of a design can reduce the need for this volume - which is why some of the factory plenums do a remarkable job.

I think the hypertune inlets are by far the best ever commercially produced items ever available - they have really take in to a new level.

You could do worse than to try to copy every aspect of thier design.

As for throttle body, see what throttles are currently in favour with modfiers a few years ago it was the 90mm q45 throttle body which is what i have, a very high quality item straight from nissan.
Toyota Nats 5 x Top Toyota
Toymods Dyno Day 19 - Killerwatt King
Supra Dyno Day 2015 Outright HP and Torque
11.10@141.34mph (0-400m)
22.048@164mph (0-1000m)

Built by ...
JMR Race Engineering - Toyota Specialist
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Tezz-Winnie
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It all depends on how much your willing to pay for minor imporvements I guess but these sorts of mods are what you do when your running out of options. As far as your Greddy system goes, you would be well off suited with the stock plenum and runners as its a very well designed system and highly regarded, even in comparison to an aftermarket solution.

But on the other hand being a fabricator I would imagine you would want to have a go :) Give it a shot and as Matt said you can go wrong copying a plenum that is already proven. Just remmeber to do a before and after dyno so we can compair the results. Should be interesting!

I know a few blokes very well knowledged on the 3SGTE Gen II and they are using mustang throttle boddies. Not sure on the generation but could ask a few questions.
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tezznu
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Im going to start one this week my car still in buys the replacement engine subpages gave me, we pulled the head off and number one cyl was rusted to [f**k] and number four has been hot an picked up so I'm getting my money back do after six months back to square one! Can dome one post a pic and show how much room I got ya work with in regards to how much closer I can get to the drivrs side tower??
3sgte transpant for the win!
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Leiden
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NZ, Whangarei
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Read this: http://forums.hybridz.org/index.php/topic/...-intake-plenum/

Good examples of different flow characteristics vs design, should help :)
Project Thread
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tezznu
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http://horsepowercalculators.net/intake-ma...manifold-design

hear i nice looking mani with thetrumpets angled whats your guys thoughts???

and the ideas at the bottom of the page?
3sgte transpant for the win!
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Leiden
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This design looks good..

Posted Image

Nice tapered plenum with ram tubes, good positioning too as it keeps the runners away from the stagnant airflow at the manifold wall.
Project Thread
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tezznu
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Yea that's the one I'm going with I ghonk
3sgte transpant for the win!
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roman
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HKS made a dual plenum manifold for the Evo back in the day.

In my opinion dual plenum is a bit of an oldschool design, before the days of manufacturers having CAD software with fluid dynamics etc.

If you look at the altezza manifold, notice how the inlet is offset from the plenum itself, and the air has to go up around the bend to get to the runners.

In my opinion this appears to be done in order to give even flow in the same way that a dual plenum design does, but with minimal internal volume by comparison.

Is the factory plenum a bottleneck anyway?

If you're effectively replicating the factory manifold but with shorter runners, it'll only be good for a turbo application, and still possibly not as good as factory.
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tezznu
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the manifold posted above is what im going to replicate using the factory runners was thinking a volume of about 3.5/4ltr volume in the plenum
3sgte transpant for the win!
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