Artech 1.6 at 10 psi - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 07-19-2012, 09:47 AM   #21
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let's see new ignition table.

Here is what I currently have in mine (car still not back up running).. not dyno tuned or anything, but basing it off of info I've found on here, probably a bit on the safe side.



edit: was on my phone earlier and posted the wrong table.... that's the one im still in progress making for my new low CR built motor.

Also forgot you were 1.6 guy. Here is DIY base map for a 1.6L motor with GT2560r...... probably a good starting point for you.

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Artech 1.6 at 10 psi-newhighredline.png  

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Old 07-19-2012, 09:59 AM   #22
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I wouldn't run that on my car.
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Old 07-19-2012, 10:02 AM   #23
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On the safe side if you have a built motor
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Old 07-19-2012, 10:10 AM   #24
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Oh yeah, I still have stock rods and pistons too.

Ok vote:

Track day on the 31st or artech 3" cat? Followed eventually by a 3" exhaust. For some reason if I want to blame something, it's not the muffler or 2.5" piping, it's the ancient 2.5" cat.
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Old 07-19-2012, 10:11 AM   #25
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the cat is the biggest bottleneck.
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Old 07-19-2012, 10:18 AM   #26
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with 155whp I wouldn't even want to track it lol
get the cat
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Old 07-19-2012, 10:28 AM   #27
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Hey, it's really fun on the track.

Metal core or ceramic core? This car still needs to pass the sniffer test every other year.
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Old 07-19-2012, 10:31 AM   #28
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metal core 200 cell.
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Old 07-19-2012, 10:33 AM   #29
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I run 2 1/2" from the turbo back...with no cat. Is 3" really necessary for a turbo that small?
I'll upload my spark table from when I dyno'd at 225whp at like 12psi when I get home.
I'm curious to see your guy's thoughts about it.
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Old 07-19-2012, 10:36 AM   #30
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yes, always.
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Old 07-19-2012, 10:40 AM   #31
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Does no cat, a 99 vs. '93 motor, 2psi, and possibly a more aggressive spark map really make 70hp?
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Old 07-19-2012, 10:43 AM   #32
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apples vs oranges

Big difference though
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Old 07-19-2012, 11:01 AM   #33
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Quote:
Originally Posted by curly View Post
Does no cat, a 99 vs. '93 motor, 2psi, and possibly a more aggressive spark map really make 70hp?

my 2.25" exhaust vs. a little porting of the head and a 3" cat/exahaust:


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Old 07-19-2012, 11:02 AM   #34
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Great Scott!!!! That's a big difference!!!
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Old 07-19-2012, 11:03 AM   #35
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whats funny is your "old" curve looks almost exactly like curly's
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Old 07-19-2012, 11:04 AM   #36
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I can't believe you picked up 45ft/lbs more torque...that's insane!
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Old 07-19-2012, 11:05 AM   #37
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Scott, looks like the old curve was a good bit richer as well -- how much do you think you gained just by leaning out the tune?
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Old 07-19-2012, 11:08 AM   #38
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IIRC both were tuned at 12:1, so take that with a grain of salt.

But yeah, other than fuel tuning, nothing else changed. Spark exact spark map, boost level (although it had a bit of creep), turbo, manifold, dp, etc etc etc.
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Old 07-19-2012, 11:12 AM   #39
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Quote:
Originally Posted by mgeoffriau View Post
Scott, looks like the old curve was a good bit richer as well -- how much do you think you gained just by leaning out the tune?
.5-1 AFR won't bump it up any more than 5-7whp. 10 in some bigger setups. at least from what I've seen.
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Old 07-19-2012, 12:02 PM   #40
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Quote:
Originally Posted by curly View Post
Track day on the 31st or artech 3" cat?
Bust the guts out of the cat you have and go to the track day. Then, before your next sniffer test you can buy a new cat and swap it in. That way everyone wins... except the planet.
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