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Old 01-23-2008, 08:17 PM   #1
Vmiz
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Default Is there points for coolness

Got to work monday and just wanted to try something different.
hurt power but gotta be points for a cool setup
Just thought i d share a picture

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Old 01-23-2008, 08:22 PM   #2
formula91
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How does the Airflow sensor work?!

+1 for coolness though. =P
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Old 01-23-2008, 08:42 PM   #3
WeakSauce2.5i
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different. . . ima have to give +1
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Old 01-23-2008, 08:42 PM   #4
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thats insane.
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Old 01-23-2008, 08:46 PM   #5
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That's still workable, dude. Nice job! If you put stacks inside the plenum boxes before you welded it, maybe it's the hot air straight off the motor hurting power. If that's two pieces that bolt together, consider an intermediate flange with the stacks on it, bolted between the two.

Get two 90 degree bends of whatever diameter you've got there and put the filters on the other end. The air needs to accelerate a touch. You did a nice job on all that hard work already. Don't give up yet. I considered that exact setup. It just needs a bit more length, IMO. There's no boost pushing the air in, so it needs more velocity.
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Old 01-23-2008, 09:07 PM   #6
Vmiz
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no flow sensor on a hydra

hamfist runners have a radius in the plenum and yes was gonna try a cold air of some sort to try to get a little air speed
as far as engine temp was 40 with the doors open when we dynod it tonight with fans so heat wasn t that big of a issue
i ll play with it a little before i make a tunnel ram for it for fun ,haven t seen a subie with a plenum out of the hood yet so it ll be fun
had a 06 manifold on it before with nice runner length but i really don t care for the runner size so i ll throw something together this week and try it
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Old 01-23-2008, 09:21 PM   #7
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Cool. I think 12-18 inches long and maybe a bit over 2in. diameter pipe. If it's possible, point the throttle bodies out instead of in while you're goofing off and see what happens. It's not so much the colder air, as it is the extra distance. A mandrel bend makes smooth air acceleration .

I moved the throttle blades away from the port, very much on purpose for velocity and a bit smoother response. But, there's a tuned length above that I haven't figured out yet. From the intake valves to the throttle plate is about 8 inches, but the injectors are still right next to the port.

I'm also opening my throttles towards the top of the ports for improved velocity, since that's where the air travels the fastest. I notice your's open left to right. That's something else to consider.
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Old 01-23-2008, 10:24 PM   #8
Kostamojen
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Turn the intakes into a ram air setup and it might work...
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Old 01-23-2008, 10:30 PM   #9
Vmiz
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yes hamfist i know all about runner lentghs and size have built a few manifolds over the years as well as hours and hours on flow benches making manifolds on different apps this was just messing around to see what it would do
i appreciate the input though some of the guys here don t know as much about shapes and sizes so its always good to share the info with the ones who would like to know and better understand it

Last edited by Vmiz; 01-23-2008 at 10:36 PM.
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Old 01-23-2008, 11:44 PM   #10
LA
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vern always impressive work, can't wait to see what the ram air will look like. sorry I didn't get a chance to say goodbye to you guys before I left.
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Old 01-24-2008, 12:05 AM   #11
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dam thats clean..whats the little blue box near the fire wall for??
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Old 01-24-2008, 12:07 AM   #12
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You're one step away from ITB's. Any of that in the works?
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Old 01-24-2008, 03:21 AM   #13
GFimpreza
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That's awesome!

Any chance at viewing the dyno graphs?
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Old 01-24-2008, 07:29 AM   #14
Vmiz
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hey LA

little blue box is a vacume block

as far as graphs thers one around here that i posted on the cars 187hp run this setup so far lost 10-15,i ll tweak it a bit and see what i can do with these pieces suprizing enough can t really feel the power lose on the street as much as i thought i would
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Old 01-24-2008, 09:06 AM   #15
Kyle86NA
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Youre not really going to have much gains from that set up unless you have a huge intake cam... And if you do, I am sooo jealous. I had ITBs on my 86 MR2, and I miss the noise Oh so much...
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Old 01-24-2008, 09:23 AM   #16
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thats really awesome man, i love it!
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Old 01-25-2008, 09:18 PM   #17
Vmiz
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well i ll keep it to put on and play with another day or for meets
today i put a believe it was off of a legasy we had around here the plastic manifold i like the shapes of the runners will try it on the dyno tomorrow to see what it does
in the mean time i ll be building a long runner manifold to try with dual throttle bodies
just want to make the motor have more bottom end for around town fun
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Old 01-25-2008, 09:45 PM   #18
Buck Rogers
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Nice fabrication, neat & clean
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Old 01-25-2008, 09:52 PM   #19
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why did it hurt power? really nice work by the way
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Old 01-25-2008, 11:52 PM   #20
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Quote:
Originally Posted by alejo View Post
why did it hurt power? really nice work by the way
Because he paired the wrong cylinders. But i give him a major +1 for dong something different.

When you pair two cylinders on the same head on a boxer motor you get two intake pluses close together then a pause. Not the best thing for even flow entering each cylinder.

I wonder if there is a way to have two separate plenum's going across the motor.
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Old 01-26-2008, 07:21 AM   #21
Vmiz
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Quote:
Originally Posted by RS_to_WRX_swap View Post
Because he paired the wrong cylinders. But i give him a major +1 for dong something different.

When you pair two cylinders on the same head on a boxer motor you get two intake pluses close together then a pause. Not the best thing for even flow entering each cylinder.

I wonder if there is a way to have two separate plenum's going across the motor.
hmm didn t think about that just did it never seemed to give a problem on old vws and porshes but nothing but a little welding to try it out i ll let ya know
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