16v manifold construction
07-20-2014, 11:25 PM
#1
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16v manifold construction
Has anyone ever chopped up a turbo intake and measured its volume? I'm shooting for a 3.8-4 liter plenum for my 16v turbo, and I just thought, what If I just welded S2 runners to a turbo plenum and reused the 951 TB? otherwise, I'm going to use this stuff
an 18" length of that stuff is just about the perfect size and volume and that company also sells the matching end cap and throttle body adapter which gives me a pick of pretty much any throttle body I can dream of. They also make velocity stacks that weld to the back after you cut 3" holes into the flat side. They are ideally matched to the 48mm S2 runners.
The Ross machine racing stuff will no doubt give me a great manifold, but using an already made plenum and TB is just easier. Its also a $$$ thing, just to buy the parts I need from Ross would be ~350+ shipping, plus a hacked up S2 manifold, plus welding. Then I would still need a throttle body, and have to figure out how to adapt whichever one I chose to the 951 throttle cable (The TPS is no big deal since I run stand alone) I'm not trying to spend 600+ dollars on an intake manifold, the complete 16v head didn't even cost me that much. Slapping an S2 and turbo intake together will cost me almost nothing. I justify it by saying down the line, I can always slice off the turbo plenum and build a new one and reuse the runners.
What say the masses?
an 18" length of that stuff is just about the perfect size and volume and that company also sells the matching end cap and throttle body adapter which gives me a pick of pretty much any throttle body I can dream of. They also make velocity stacks that weld to the back after you cut 3" holes into the flat side. They are ideally matched to the 48mm S2 runners.
The Ross machine racing stuff will no doubt give me a great manifold, but using an already made plenum and TB is just easier. Its also a $$$ thing, just to buy the parts I need from Ross would be ~350+ shipping, plus a hacked up S2 manifold, plus welding. Then I would still need a throttle body, and have to figure out how to adapt whichever one I chose to the 951 throttle cable (The TPS is no big deal since I run stand alone) I'm not trying to spend 600+ dollars on an intake manifold, the complete 16v head didn't even cost me that much. Slapping an S2 and turbo intake together will cost me almost nothing. I justify it by saying down the line, I can always slice off the turbo plenum and build a new one and reuse the runners.
What say the masses?
Last edited by Dougs951S; 07-28-2014 at 11:33 PM.
07-21-2014, 01:03 AM
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Good...so the stock plenum has plenty of volume then to feed a 16v car? I assumed as much. No velocity stacks, but then again...none of the factory intakes have them. Thanks Paulyy.
07-21-2014, 01:31 AM
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As far as velocity stacks, I would assume that's more for N/A power.
Because a 2.5 16v isn't as common, there's not much info about them. like how well will the 951 8v intake with with a 16v?
Lindsey racing and SFR have velocity stacks in their intakes.
shorter the runners, the higher the rpm.
IMO go get 2 16v intakes (if you can)
hack one up and mate it to the turbo 8v one and the other one, make a custom plenum.
R&D really.
Because a 2.5 16v isn't as common, there's not much info about them. like how well will the 951 8v intake with with a 16v?
Lindsey racing and SFR have velocity stacks in their intakes.
shorter the runners, the higher the rpm.
IMO go get 2 16v intakes (if you can)
hack one up and mate it to the turbo 8v one and the other one, make a custom plenum.
R&D really.
07-21-2014, 02:32 AM
#6
Three Wheelin'
Why do you guys think that velocity stacks are "more of NA thing"? There are no fundamental differences between NA and forced induction, good flow is beneficial to both types, just boost hides many design flaws and lets OEM's (and also hobbysts) to get away solutions that are not optimal.
And for example: what's the point of getting more airflow from better turbo and then losing because of poor intake?
BTW, OEM manifolds have tapered runner inlets, this is not the same as 90degree sharp connection of the runner and plenum...
And for example: what's the point of getting more airflow from better turbo and then losing because of poor intake?
BTW, OEM manifolds have tapered runner inlets, this is not the same as 90degree sharp connection of the runner and plenum...
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07-21-2014, 05:18 AM
#8
I would be interested to drive a car using a 16V/951 hybrid intake. Probably looks like the most straightforward way to quickly come up with a turbo intake fitting fine with a 16V head, but I would think that getting good performance from such an intake/head combination would be very sensitive to cam/turbo combination.
07-21-2014, 08:27 AM
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Another option would be to make a custom plenum design using an existing aftermarket intake - like turbotim3 did.
He started with something like this (for a Supra), cut the runners off, and welded a new plate and 16V runners on...
http://www.ebay.com/itm/221432214358?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
He started with something like this (for a Supra), cut the runners off, and welded a new plate and 16V runners on...
http://www.ebay.com/itm/221432214358?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
07-21-2014, 10:35 AM
#12
Three Wheelin'
There is no room for AWIC intake manifold.
I made my own intake using stock S2 flange+runners and made dual-plenum with velocity stacks like Audi Quattro S1 and other rally cars have used.
I made my own intake using stock S2 flange+runners and made dual-plenum with velocity stacks like Audi Quattro S1 and other rally cars have used.