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Old 12-09-2015, 05:47 PM   #5441
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I can't read people's minds and try to discuss what someone else thinks. I did the same things two years ago (bolt a bigass turbo to the motor to see how it feels). Just pointing out that didn't go as well as I thought it would, that setup was taken apart after 700 miles.
You left the blow off valve wide open. Do you honestly count those 700 miles as experience of a bigass turbo? Or do I just not follow what you type close enough. That'd probably be pretty relevant info to add, were you going bragging about what your experience with certain setups is.

You obviously still aren't happy with your car as it is either, the thread you opened asking for help makes it obvious. Now you are in this thread saying you are ecstatic about how well it works? What the hell is it, could you try and be a tad more consistent?
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Old 12-09-2015, 05:48 PM   #5442
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To be fair his new thread wasn't "My car sucks, how do i make it good" It was more "I like my car, how do i make it better"
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Old 12-09-2015, 05:49 PM   #5443
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It sounded a lot like, "why my car no make power like everyone else?" to me, but what do I know.
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Old 12-09-2015, 05:50 PM   #5444
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Last few posts in it cleared that up.
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Old 12-09-2015, 05:52 PM   #5445
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See my last post. I think 600+ would be a stretch on the s200sxe. Fae went s366 when he wanted 600+

Budget is a significant portion of this too. I make decent money, and live cheap. But I don't have coin to go dropping on big money turbos all the time.

Right now I have about a 2.5k budget for the motor. (pistons, rods, oil pump, damper) and I would like to keep the turbo setup under 1k. with a cheap HX30 I bet I could keep the setup under $500.
I could get you a good deal on Fae's setup. You know you want to run ALLOFIT!
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Old 12-09-2015, 05:53 PM   #5446
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Pat?

lol, jk
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Old 12-09-2015, 05:54 PM   #5447
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I could get you a good deal on Fae's setup. You know you want to run ALLOFIT!
QSV are stupid. if it was a TS manifold maybe.
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Old 12-09-2015, 05:58 PM   #5448
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It helps spool because one of the scrolls is smaller than the other. Check out something like this:
I would have thought that having half the cylinders going through a smaller A/R turbine bit would just give you the same spool response and top end as using an A/R that's midway between the two.

As for 500-600 rwhp, there are so few Miatas out there making that much power that it's unclear what's going to break at that point. I would bet that there are a bunch of things that are fine at 350 that aren't at 550 other than just the rods & pistons.

--Ian
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Old 12-09-2015, 06:07 PM   #5449
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There are a bunch of benefits from a twin scroll housing. You get better transient response. Better VE,

Poor mans VGT

Basically you get one with higher velocity and one with higher flow. You end up with better spool, and more topend


Twin Scroll Turbo System Design - Modified Magazine
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Old 12-09-2015, 06:18 PM   #5450
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Mazda SAE paper from years ago

Mazda scientifically tests single scroll vs twin scroll turbos - RX7Club.com

There is some good actual info in that thread if you keep reading.
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Old 12-09-2015, 06:22 PM   #5451
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Holy ****, what do you know, the guy who posted those articles is a member of our forum too and is chock full of good info from his other posts that ive read.

arghx7, I'm assuming thats you in the rx7 thread.
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Old 12-09-2015, 06:28 PM   #5452
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I've been considering switching to a k03 or k04, because I want all the boost at 1500 rpm and I don't care about anything more than 200-250 ft/lbs.

They make cheap china ones, just have to make a manifold. They have such tiny inlets though, it would be a trick manifold to make.
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Old 12-09-2015, 06:29 PM   #5453
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It sounded a lot like, "why my car no make power like everyone else?" to me, but what do I know.
It runs 7's in the 1/8 mile with 0.4 second gear changes from a dying master cylinder. It's making about 350whp just like it sits, which was my goal when I began designing the SC setup. That thread titled "how do I get more boost/power with my supercharger" was about how to get more boost and more power from my supercharger. And I got some great answers from some of the smartest people on this forum, which is exactly what I hoped for.
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Old 12-09-2015, 06:29 PM   #5454
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Talk to yank he has one that small from a BMW or something. If you asked nice maybe we could fab you a manifold for it.
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Old 12-09-2015, 06:36 PM   #5455
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... were you going bragging about what your experience with certain setups is. ..
I literally smiled at this. I guess I was "braggin" when I said I was stupid enough to leave the BOV open, and not figure out that was the problem for so long that it was 2 years after I took it apart before I even figured it out. Clearly I was looking cool. Or maybe I was embarased but felt I should be honest about it now that I finally know why that setup sucked so bad. Nah, probably bragging.
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Old 12-09-2015, 06:38 PM   #5456
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To be fair I would brag if I had an EFR7670 sitting at home too....

Pat, you should loan that to me for a bit. Aren't you interested in how much power it would make?
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Old 12-09-2015, 06:41 PM   #5457
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To be fair I would brag if I had an EFR7670 sitting at home too....

Pat, you should loan that to me for a bit. Aren't you interested in how much power it would make?
I'll sell it, not about to loan it. If you seriously want to buy it, I would consider selling it. I actually would be interested to see what it could make.
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Old 12-09-2015, 06:44 PM   #5458
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Honestly you would be offended if I offered what I would be willing to pay for it. I really don't want a big dollar turbo.
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Old 12-09-2015, 06:49 PM   #5459
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I won't be offended, I'll just say no if it's not enough for me to sell it. It's just sitting in the living room next to the GT3271 and some broken pistons and a few other broken parts. I kept it cause I figured one day it might go back on the miata. Now that I know why it spooled so bad, if the SC were to take a crap on me, that's probably what I'd do. But I think I finally got the SC setup ironed out after way too many problems/design flaws/crappy welds/etc.
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Old 12-09-2015, 06:50 PM   #5460
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My turbo $$$ stack right now is 600. If that buys me an EFR I'll probably cry. And even take a video of it :P
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