Trackspeed Engineering/ABUSRDflow - GT2871R, E85, 1.9L 8.6:1 - 351whp/294tq/17psi - Miata Turbo Forum - Boost cars, acquire cats.

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Old 07-24-2010, 02:48 PM   #1
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Default Trackspeed Engineering/ABUSRDflow - GT2871R, E85, 1.9L 8.6:1 - 351whp/294tq/17psi

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Red and green lines are my last trip at 14psi on 100 octane. Baseline was ~330whp at 14psi after setting up the fuel map for E85.

The next restriction is starting to show itself. The torque is phenomenal but it's dropping off faster at 17psi than it did at 14psi before. I'm thinking cams and headwork are next on the list to prop that up. I also need to get a different boost gauge as well as an EGT sensor, just to see how comically low the EGTs are. I'm expecting ~1300 degrees.

I'm very happy with the results. I would have liked to get more boost but my MBC was acting up and I didn't want to waste time and money futzing with it. As it sits 380whp should be easy at 22-23psi. The torque curve is just phenomenal, essentially peak torque available from 4200rpm to 6200rpm.

Timing is approximately 20 degrees at 17psi. I did a pull at 22 degrees and lost power. 19 degrees was ~345whp.
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Old 07-24-2010, 02:56 PM   #2
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Awesome. I'd like to go E-85 some day. I'm only a mile from a station with it.
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Old 07-24-2010, 02:57 PM   #3
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Was this done on ID1000's? If so, what was your duty cycle?
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Old 07-24-2010, 03:09 PM   #4
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This is with the VVT doing its job, right? that's pretty awesome "low end torque" for that motor.
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Old 07-24-2010, 03:24 PM   #5
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190 ft/lb at 3K, yeah, it's got good low end I'd say.
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Old 07-24-2010, 03:42 PM   #6
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Same VVT settings as before, yep. I think its 200tq at 3500rom, those straight lines are funky. Not sure if they are part of the chart or a dyno burp.
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Old 07-24-2010, 03:46 PM   #7
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that is awesome, i need some of that in my life!
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Old 07-24-2010, 03:49 PM   #8
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I can feel the torque through the computer screen.
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Old 07-24-2010, 06:36 PM   #9
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Shazaaam!

Stock cam and head?
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Old 07-24-2010, 07:06 PM   #10
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100% untouched cams and head.
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Old 07-24-2010, 07:26 PM   #11
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Quote:
Originally Posted by Savington View Post
The torque is phenomenal but it's dropping off faster at 17psi than it did at 14psi before. I'm thinking cams and headwork are next on the list to prop that up.
Your power is already flat from 6300-7200 RPM. I don't think you'll benefit from cams unless you raise the revlimit.
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Old 07-24-2010, 07:36 PM   #12
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Congrats on the new numbers using e85. I love the stuff, glad to see it helped make such a difference with your setup. Your car must be a ******* riot to drive lol!
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Old 07-24-2010, 09:56 PM   #13
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Hey next time you're in NJ I want to borrow your car for a few, if you don't mind.
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Old 07-24-2010, 11:38 PM   #14
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Congrats on power. That's awesome.
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Old 07-24-2010, 11:56 PM   #15
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Fantastic
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Old 07-25-2010, 08:45 AM   #16
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God that is the power I want. Same low end power that my 2554 had but a shitton of more top end.
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Old 07-25-2010, 10:51 AM   #17
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where did you experience detonation? I like to have at least 4* retard from detonation. I know you hit MBT...but what about headroom from detonation? I vote take at least 4* out considering how we drive these cars.
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Old 07-25-2010, 05:23 PM   #18
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So I hate you for your early spool and flat torque curve between 4200-6000. You are hitting peak torque 800 rpm before I am. What do you attribute the early spool to? Tuning/fuel map, absurdflowage, IM, VVT, all the above? It does not seem to be the fuel judging by your comparison plot.
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Old 07-25-2010, 06:43 PM   #19
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Quote:
Originally Posted by zx-tex View Post
so i hate you for your early spool and flat torque curve between 4200-6000. You are hitting peak torque 800 rpm before i am. What do you attribute the early spool to? Tuning/fuel map, absurdflowage, im, vvt, all the above? It does not seem to be the fuel judging by your comparison plot.
af.
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Old 07-25-2010, 06:46 PM   #20
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probably the combination of all the hardware, though I can vouch for VVT being responsible for 500 rpm of spool improvement by itself.
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