T3 Chinacharger at 13.5psi - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-12-2010, 02:31 PM   #1
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Default T3 Chinacharger at 13.5psi

Strapped on the dyno again. This time I put a little more boost into it; averaged 13.5psi. Run on a dyno dynamics dyno (PURPLE), so the below comparison has a 10% correction factor (# operator told me to compare dynojet with, runs his spec miatas on dynojets often and sees this drop). The RED line is MS-I, no cat, and my genuine Super 60 T3.

The only change in this setup is the MS-II unit (same spark map) and a metal core cat. The drop up top didn't happen before the cat, so the test pipe needs to go back in and possibly the old Super 60 as well, I miss that top end. But the mid definitely has more guts, and I do like that. I'm also lazy.

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Old 04-12-2010, 02:37 PM   #2
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Looking good Mr. Brain. You know if you want some top end back, I bet a 50 trim t04e compressor mated to a stage 1 .48ar turbine would be a really neat combo. You would still have more low-end than I do, and you could get that top end back with a quickness .
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Old 04-12-2010, 02:54 PM   #3
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eh. i have a stock block. don't need more than 230rwhp. i do like that i've breached 200rwtq though.
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Old 04-12-2010, 03:01 PM   #4
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Got a log of your boost?
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Old 04-12-2010, 03:03 PM   #5
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Not too bad... I like how the torque curve seems to be fairly flat. *thumbsup*
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Old 04-12-2010, 03:23 PM   #6
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Quote:
Originally Posted by levnubhin View Post
Got a log of your boost?

yes. This was that pull compared to one I just did in Nov. Only difference here is MS-II and Convertor. I gotta assume the cat is what's dropping the torque off, that or the smaller compressor wheel is out of steam. (10% correction again here). soft cut limiter at 6700RPM as well...whoops.



but at 5200RPM im making more than 20rwhp owith just a pound more boost...that's always nice, could be the MS-II. Lars saw a lot of torque gains with his....his setup never changed but going to MS-III.

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Old 04-12-2010, 05:10 PM   #7
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I would add a psi or two up top to keep the torque up. That would give you win/win with mid and upper end.

I daily drove my 1.6 at 17+ psi that way.
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Old 04-12-2010, 07:44 PM   #8
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When's the next DE dyno day? Not to be a dick there Scott, but do you think I'll beat your numbers with my SR-20 t25 running the same boost as you were?
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Old 04-12-2010, 08:42 PM   #9
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this makes me wonder if the cat converter is why i always lose so much power up top. what size exhaust plumbing/cat?
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Old 05-02-2010, 08:35 PM   #10
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3" 300 cell metal core. there was also a soft cut limiter at 6700 that dropped my timing to 12*



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