Back to the dyno in my "de-Greddified" 1.6L DIY setup - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-01-2011, 10:19 PM   #1
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Default Back to the dyno in my "de-Greddified" 1.6L DIY setup

Hello All,

I'll add a little more commentary in my build thread, but for the sake of this sub-forum, I'll cut the chit-chat.

All cinched in!


Here's the latest engine shot.


My best horsepower run was 252.8 at 6,400 rpm and my best torque run was 219.8 ft-lbs at 5,600 rpm. The best thing is how flat the torque curve is. These curves make my old Greddy setup look like there was a potato in the tailpipe at the top end.

While I'm happy with those numbers, the dyno is a harsh mistress. She immediately informed me of a bad boost leak that I had thanks to a blown out DSM throttle body elbow gasket. The leak was quite spectacular, shooting a mist of my "boost cooler" fluid all around the gasket. This will be an easy fix and will definitely help with power and torque. It's hard to say how much that hurt my numbers, but it did have a negative impact - it was a huge leak.

Here's the dyno sheet:



And here's the video:


So what did I learn?
  • Don't ever forget to do a boost leak test before heading to the dyno ever again. (I'm REALLY kicking myself over this one.)
  • This manifold and turbo setup is superb for a stock 1.6L engine. How can you argue with the great power curves, especially given the price?
  • A 3" exhaust will undoubtedly help, as will a similarly sized true Garrett turbo.
  • I'll be adding my ECMLink software soon, as the "mystery EPROM chip" in the ECU and the HKS VPC piggyback aren't optimal for fine tuning, which is leaving some power on the table. For those not familiar with Mitsu stuff, ECMLink offers robust tuning and datalogging features via a simple drop in flash storage EPROM chip. If you'd like to see more, check out the install on on my Talon website It's a great tool.
  • The Miata has got to be the greatest all-around platform that a car guy could ever want!
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Old 04-01-2011, 10:46 PM   #2
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Good numbers, sounds great, looks great can you really ask for more. Nice car and build.
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Old 04-02-2011, 12:11 AM   #3
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Great numbers!
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Old 04-03-2011, 01:42 PM   #4
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Thanks guys! It's such a fun car right now.
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Old 04-03-2011, 02:01 PM   #5
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Tom, we could be making a bunch of subaru's cry right now at the autox

I think a group of guys are doing a dragon run this month, you should tag along if you have the time.

http://www.topbb.com/sportscarfrenzy...portscarfrenzy

That's the forum most of the people that are going are on. Not too ricey, not too purist, its a decent mix of people and small enough that everyone knows each other just about.
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