Anyone with FI add a square top IM? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 10-17-2013, 02:23 PM   #21
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I'll definitely take you up on that when I'm good and ready
Thanks
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Old 10-17-2013, 03:02 PM   #22
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V: My offer still stands to loan you my spare VICS manifold when you get around to testing the VTCS vs Squaretop. I'd be nice to see all 3 on the same testbed with some 100kpa+ data
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I'll definitely take you up on that when I'm good and ready
Thanks
This is part of the reason why I love mt.net, the fact that we will share parts just get testing done is great.

If we really want to go crazy depending on when 18PSI does his testing, I might be willing to offer up my BEGI cast manifold for use. Only issues I know off the top of my head would be a different TPS and idle valves.
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Old 10-18-2013, 11:40 AM   #23
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haha ok valid point

Exactly. I think most the street/daily driver VICS guys don't really even need this thing. Heck, even the VTCS guys don't really need one for the street (and one of the reasons I'm going to try using my vtcs mani at 1st and only switch to the squaretop if I'm unhappy with it). The track guys love this cause its OEM, bolts right up, and actually holds together unlike some of the honda mani's we've seen. And those running setups that make serious top end power obviously want it too because the stocker chokes up pretty dramatically (at least the vtcs does) past 300 or so.
I think you'll be fine with the VICS with a stockish redline. You can remember from my dyno more or less where the torque and hp start to tank, though my boost did taper down a tiny bit after peak power (because remember, I was making 10psi on a 7psi and not boost controller). It now ramps the boost up from 10psi @ 6500rpm to 12psi @ 7500 and the torque curve feels a lot flatter when you drive it. Assuming that taper actually held the torque flat thats about 300hp. I kind of feel like, yes the runners are kind of small and make a good deal of drag when you try to cram a lot of air in, but if you have the head room in the pressure department to support higher pressure you can more or less over come it. But I think the VICS will move your theoretical pressure vs flow plot vertical on the compressor map compared to the same engine with a flat top when trying to make the same amount of power.
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Old 10-18-2013, 11:49 AM   #24
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Am i learning in this thread that the VCTS manifold sucks and i should gut the system?
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Old 10-21-2013, 09:52 PM   #25
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Am i learning in this thread that the VCTS manifold sucks and i should gut the system?
No such thing as VCTS.

VICS = Variable Inertia Charging System = alters plenum volume and Helmholz frequency to improve midrange torque. Keep this, it's good.

VTCS = Variable Tumble Control System = improves intake charge tumble at low RPM/low CLTs to improve cold-start emissions. This is pure smog garbage, remove it at once.
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Old 10-21-2013, 10:17 PM   #26
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Yeah, typo, my apologies.

I knew VICS was good. Had it on my Escort.

Never bothered to worry about VTCS, but I guess I may as well gut it this Spring before I get tuned for corm. What gains should I see removing it?
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Old 10-21-2013, 10:27 PM   #27
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This is part of the reason why I love mt.net, the fact that we will share parts just get testing done is great.

If we really want to go crazy depending on when 18PSI does his testing, I might be willing to offer up my BEGI cast manifold for use. Only issues I know off the top of my head would be a different TPS and idle valves.
Lars,
I plan to do a test day soon, in about a month is my guess? I plan to test several intake manifolds on the same day. I would love to test your manifold as well, maybe you can come up? I will leave the car on the dyno and change manifolds before testing again in hopes of usable data. Maybe you will extend your offer to me as well?
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Old 10-22-2013, 12:35 AM   #28
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oh snap that would be awesome
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Old 10-22-2013, 08:45 AM   #29
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Lars,
I plan to do a test day soon, in about a month is my guess? I plan to test several intake manifolds on the same day. I would love to test your manifold as well, maybe you can come up? I will leave the car on the dyno and change manifolds before testing again in hopes of usable data. Maybe you will extend your offer to me as well?
you think they'll appreciate coolant all over their dyno?
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Old 10-22-2013, 09:29 AM   #30
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you think they'll appreciate coolant all over their dyno?
How does changing the IM release coolant? Well unless you're a ***** and still have the TB heat still hooked up.
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Old 10-22-2013, 09:56 AM   #31
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I is such a ***** but see no reason it means I have to get coolant everywhere. I will have all my manifolds set to take the OEM TB and will use the 64mm Skunks TB so I will use the same TB for all the tests......at least that is my current plan.
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Old 10-22-2013, 09:57 AM   #32
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I is such a ***** but see no reason it means I have to get coolant everywhere. I will have all my manifolds set to take the OEM TB and will use the 64mm Skunks TB so I will use the same TB for all the tests......at least that is my current plan.
The skunk doesnt have provisions for TB heat so you're all set.
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Old 10-22-2013, 10:03 AM   #33
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oh is there no coolant port between the runners on the BPZ3?
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Old 10-22-2013, 10:09 AM   #34
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oh is there no coolant port between the runners on the BPZ3?
Not that I recall, I think thats a 1.6 thing.
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Old 10-22-2013, 10:10 AM   #35
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Not that I recall, I think thats a 1.6 thing.
1.6L is bossmode.
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Old 10-22-2013, 11:00 AM   #36
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What about the fuel line routing? Doesn't that go between the runners?
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Old 10-22-2013, 11:02 AM   #37
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What about the fuel line routing? Doesn't that go between the runners?
I dont know how the stock NB routing goes, my M-Tuned routing both lines *** in from the rear.
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Old 10-22-2013, 02:24 PM   #38
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The BP6D Chris will be running doesn't have any stupid coolant ports in the IM. And if he's smart he will already have looped the stupid TB coolant lines (or will do that prior to dyno time). Nothing else will prevent him from being able to carefully remove just the IM and nothing else and replace it. Been there done that.
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Old 10-22-2013, 02:44 PM   #39
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Originally Posted by Amellrotts View Post
Lars,
I plan to do a test day soon, in about a month is my guess? I plan to test several intake manifolds on the same day. I would love to test your manifold as well, maybe you can come up? I will leave the car on the dyno and change manifolds before testing again in hopes of usable data. Maybe you will extend your offer to me as well?
Shoot me a pm with info. Depending on when it is I might be interested in heading up to NC to help.
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Old 10-22-2013, 03:10 PM   #40
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I know with my square top I had to hog it out to match the Skunk TB. The size difference is pretty noticeable.



I have one square top gasket matched to the Skunk TB/ports and one that is left alone. If you want a hand, or another manifold(s) to play with hit me up. Depending on schedules I might make the trip over your way. Wife will probably send me with food as well. Can't do dyno on empty stomachs.
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