2560 on a 99 motor at 14psi with MSPNP 300hp - 241ft/lbs - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-04-2008, 07:52 PM   #21
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Can you post the timing map? I was curious about that torque dip. That is some stupid power/torque. Good for you.
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Old 01-04-2008, 07:57 PM   #22
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Quote:
Originally Posted by Braineack View Post
I have a similar dip in torque at 4K (as well as other Megasquirted miatas). Did you start with a DIY timing map and work from there? I suspect we need more timing around there.

can you send me that .drf file?
basically the bottom four rows ARE the DIY PNP timing settings. From 75kpa and up i kinda copied TurboTim's timing map.

here it is scott. http://www.miatamx5.com/dynoruns/12-....miata_003.drf

that rest are obviously in the same directory

Last edited by paul; 01-04-2008 at 08:08 PM.
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Old 01-04-2008, 08:03 PM   #23
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Originally Posted by soflarick View Post
Can you post the timing map? I was curious about that torque dip. That is some stupid power/torque. Good for you.
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Old 01-04-2008, 08:06 PM   #24
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Originally Posted by Loki047 View Post
More Timing STAT!!!

Stock superflow head?
its a stock 99 head on a stock 99 block. currently the VICs is not hooked up so it's sitting in whatever position it sits in at rest. i gotta work on that.
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Old 01-04-2008, 09:27 PM   #25
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If the solenoids are not operating, then the butterflies are in the open position. A vacuum has to be applied to the solenoid to close the butterflies. I had a 99 intake on my engine with the 99 head, operated the VICS via the Hydra ECU. Removed the head for a BRP R4 intake.

On another note, I ran WAY more timing on my engine with the MP62. I've been told the SC can take more timing than a turbo.
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Old 01-04-2008, 09:49 PM   #26
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open is what it would be in low rpms for more torque?
and closed above 5200 for more air flow?

or do i have that backward?
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Old 01-04-2008, 09:59 PM   #27
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holyfuckingshit. My car is going to be bad.
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Old 01-04-2008, 10:01 PM   #28
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the 99's are supposed to handle less due to the higher compression pistons. some say with a good tune it'll be fine. we shall see.
this makes me want to not send my motor for machine work and just run it as is.

With that kinda power, my gt2860rs might be overkill.

what rpm made 8psi?

Last edited by hustler; 01-04-2008 at 10:17 PM.
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Old 01-04-2008, 10:05 PM   #29
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Quote:
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open is what it would be in low rpms for more torque?
and closed above 5200 for more air flow?

or do i have that backward?
the longer runners are for low rpm. I can't remember if that's open or closed. Watch a vid of the 787b...its awesome.

Your **** is going to be ******* fast, and make boost sooner if you just pinned it at tdc.
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Old 01-04-2008, 10:44 PM   #30
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Butterflies closed at rpm below 5200 and open above. Seems Mazda opened them early, online research and helping one guy on a dyno showed that opening them at 5600 was best.
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Old 01-06-2008, 07:58 PM   #31
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Quote:
Originally Posted by paul View Post
open is what it would be in low rpms for more torque?
and closed above 5200 for more air flow?

or do i have that backward?
You have it backwards. Hence the need for a vacuum canister...as you go WOT the vacuum in the canister keeps the actuator "closed" until you hit the 5200 or 5600 crossover, then the solenoid opens or closes or whatever and the actuator "opens".
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Old 01-06-2008, 08:09 PM   #32
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What if I just did a mechanical solenoid powered by the MS? Anyone know of something suitable?
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Old 01-06-2008, 08:20 PM   #33
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Oh! yeah that'd be a great idea actually. I know mcmaster has a few 12V solenoids that have decent stroke. go see how much that vacuum canister actuator moves (probably around .5 inch I'd guess) and go look up an electric version on mcmcaster.
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Old 01-06-2008, 08:26 PM   #34
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i got one in the living room on the spare 99 head. brb...
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Old 01-06-2008, 08:38 PM   #35
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F'n nice. Great numbers.
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Old 01-06-2008, 09:00 PM   #36
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here are the butterflies when no vacuum is applied, they are open


here are the butterflies when vacuum is applied, they are closed


here here is how much the actuator arm moves, 1/2" just as Tim guessed


here is the vacuum solenoid


contrary to what some people believe/say these butterflies do not vary the length of the intake runners by redirecting air. in fact what they do is open an additional resonance chamber, much like the external helmholtz resonance chamber found on the intake crossover tubes of the earlier Miatas which is beneficial at low rpm/low velocity intake charge.


now where are these mechanical/electrical solenoids?
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Old 01-06-2008, 09:07 PM   #37
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so you just needs these to open these at a certain rpm? that's an easy mod!

use the MS to switch the solenoid to ground at whatever RPM, and they'll open. or does the solenoid close with v12?
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Old 01-06-2008, 09:36 PM   #38
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Do you have any pic's of the turbo? Im trying to figure out which Garret turbo is on the FM kit I got. I looked at the garrett website. But it would be nice to see one setup. Especially one pushing LT1 Horsepower!
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Old 01-06-2008, 10:20 PM   #39
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Old 01-06-2008, 10:31 PM   #40
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Paul, there are 2 solenoids in the VICS system, your photos show both, all you need is an rpm switch to control the electric solenoid operation to feed vacuum or not to the solenoid controlling the butterflies. My Hydra does this, as the BRAIN said the MS will, or you could run an MSD rpm switch or something like that.

Like you said, the VICS doesn't shortcut the intake runners, it opens the butterflies to allow air from a small port into the system. I helped dyno test an N/A 2000 Miata engine, only had a header and exhaust on it, with a 1.6l AFM. The dyno showed the engine ran best when the VICS opened the butterflies at 5600rpm. It was easy to see the difference on the dyno graphs. Even with the 1.6l AFM, the car made 129rwhp with only a Fuji 4/1 header and simple Supertrapp exhaust. The Supertrapp was very restrictive when running street quiet, street disks reduced power to 119. I think a straight through with a Magnaflow would have kept the power at 129. Pretty sweet for an otherwise stock engine.

If you don't want to run the VICS, I've read that keeping the butterflies closed will afford best power at low and little sacrifice up top.
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