VICS
Re: VICS
I'm rebuilding a BP from a 91 Escort GT. I have my intake manifold completely apart atm. I'll try and post some pics in the next few days (how do you attach pics?). Today I have to shave my wife's horse so I probably won't get to it today.
The article in the URL above seems flawed. The VICS doesn't close off one thing while opening another. There is a set of air paths that are always open (one per cyl). The VICS is a set of butterfly valves that connect a resonance chamber to these paths. The resonance chamber also has a small (2cm sq.) channel that connects in a roundabout fashion back to the main intake.
I don't know if the VICS is open at low RPM and closed at high RPM, or vice versa. My guess is it is open at low RPM to even out the impulses. Opening the VICS doesn't increase airflow. The main restriction is the 55mm diameter inlet that is connected to the air intake valve.
The article in the URL above seems flawed. The VICS doesn't close off one thing while opening another. There is a set of air paths that are always open (one per cyl). The VICS is a set of butterfly valves that connect a resonance chamber to these paths. The resonance chamber also has a small (2cm sq.) channel that connects in a roundabout fashion back to the main intake.
I don't know if the VICS is open at low RPM and closed at high RPM, or vice versa. My guess is it is open at low RPM to even out the impulses. Opening the VICS doesn't increase airflow. The main restriction is the 55mm diameter inlet that is connected to the air intake valve.
Re: VICS
That explanation is a bit goofy comparing it to VTEC and such...
I'm interested in seeing the pictures, I was kind of hoping the manifold wasn't set up the way it's being described. I'm pretty sure a different method would yield better results.
I can host the pics for you if you want to send them to me. I'll send you a pm...
I'm interested in seeing the pictures, I was kind of hoping the manifold wasn't set up the way it's being described. I'm pretty sure a different method would yield better results.
I can host the pics for you if you want to send them to me. I'll send you a pm...
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papa roached
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Re: VICS
heck, the VIRS system on the V6 motors is different than how he talked about it but he listed the V6s as having VICS and they dont, its VIRS
93 MX-3 GS (collecting parts for Eunos Presso conversion), 94 626 Transmission (4.10 gears), KL31 camed KL-ZE, Millenia intake, Millenia TB, SSAutochrome V2 headers, Magnaflow cat, 2 1/4 in pipe, Top Speed Pro 1 muffler, 9lb Fidanza Flywheel, ACT clutch, Corksport SS clutch line, Corksport SS brake lines, Unorthadox UDP, 255 lph fuel pump, HEI mod, ghetto-charger intake, KL36 ECU, SRD transverse crossmember bushings, SRD shifter extention bushing, SRD crossmember, Corksport bronzoil shifter bushings, Brembo Crossdrilled and Slotted rotors, 15 inch Konig Heliums, ZX-2 S/R struts, Eibach lowering springs, OEM front strut bar, Ebay rear strut bar, BFGoodrich G-Force T/A KDWs
Parts needing installed: turbo kit from BB (if i ever get it), 9.0:1 CR Diamond pistons, 4340 forged H beam rods, C/J-Spec spoiler, Nissan red tops in KL rails
http://www.cardomain.com/id/blazejeremy
Parts needing installed: turbo kit from BB (if i ever get it), 9.0:1 CR Diamond pistons, 4340 forged H beam rods, C/J-Spec spoiler, Nissan red tops in KL rails
http://www.cardomain.com/id/blazejeremy
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BuGS
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Re: VICS
VICS is simply a a mechanism that opens up antoher Air channel to your Cyl. It is closed at lower RPM to give you maximun torque. Then it opens force more air in to give it maximum Horsepower. There are multiple DYno's on Clubprotege.com That show the effects and whatnot. If i remember right so far the best setup was a RX-7 Maf with the Vics cuz then you have a 5 HP gain when VICS is ran with the RX-7 MAF.
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schwankesmx3
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Re: VICS
i could swear that my b6ze has the vics only because when i hit 5500 the intake gets really loud like what vtec does to a honda and also at 5500 the speed builds much much quicker and the car pulls ur head to the seat and thats when i start to beat most d-series hondas
3-1-0 RACING club PREZ.
94' mx-3.....was all motor now awd bpt
91' 323....daily driver
78' cutless coupe...bad a-- mofo v8
95' eclipse gsx......awd turbo 11.4 eta
94' mx-3.....was all motor now awd bpt
91' 323....daily driver
78' cutless coupe...bad a-- mofo v8
95' eclipse gsx......awd turbo 11.4 eta
Re: VICS
Current published internet explanations are seriously flawed. Rather than take up a bunch of space in discussion, just click on the numbers for the pics that John Long sent me.
From information I've read on basic function of such systems and the pictures...
The long runners go around towards the back of the manifold. Objective- reflected waves tuned to aid volumetric efficiency at lower rpms. The long runners are not terribly small, and there is no switching between one and another.
As another importnant factor you can see from the pictures.. the bump in the bottom half is intentional as the air is coming around the bend and almost ready to straighten out. It is there to induce swirl into the intake charge. Good for fuel economy, good for low engine speed with less natural turbulence.
When the short runners open up, it has the effect of smoothing that bend out a bit and changing that to more of a tumble... and the function is to aid volumetric efficiency in higher rpms.
It's still a compromise put on a factory car trying to get best of both worlds. Dedicated intake to performance should yield much better results.
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From information I've read on basic function of such systems and the pictures...
The long runners go around towards the back of the manifold. Objective- reflected waves tuned to aid volumetric efficiency at lower rpms. The long runners are not terribly small, and there is no switching between one and another.
As another importnant factor you can see from the pictures.. the bump in the bottom half is intentional as the air is coming around the bend and almost ready to straighten out. It is there to induce swirl into the intake charge. Good for fuel economy, good for low engine speed with less natural turbulence.
When the short runners open up, it has the effect of smoothing that bend out a bit and changing that to more of a tumble... and the function is to aid volumetric efficiency in higher rpms.
It's still a compromise put on a factory car trying to get best of both worlds. Dedicated intake to performance should yield much better results.
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