I'm going in, cover me... (Built 1.8L GT2871) - Miata Turbo Forum - Boost cars, acquire cats.

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Old 06-16-2010, 11:11 AM   #1
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Default I'm going in, cover me... (Built 1.8L GT2871)

At long last I will be taking the '99 NB to the dyno tomorrow. I'll be using the Dyno Dynamics Dynamometer (load bearing, eddy current) located at Henderson Performance in New Braunfels. Cory, the dyno owner, will be operating the dyno, and representatives from BEGI will be present to assist with tuning. I'll be driving WARI to adjust the Adaptronic maps.

The goal is 300+ RWHP, but above all to make it a strong, non-marginal tune on 93 oct pump gas. We will tune for MBT and knock onset (whichever comes first) without the water injection, then back off a couple of degrees. Then I will add the water injection on top of that for additional margin. This is a daily driver so the goal is fast but reliable.

Build Details:

Short block:
1999 NB 1.8L
Stock Crank (meanest stock crank on MT.N)
Belfab rods
FM Wiseco pistons, 9:1
all balanced

Cylinder head:
1999 cylinder head
Supertech oversized valves, undercut
Supertech Valve springs and titanium keepers
Stock 1999 cams and pulleys

Induction/Exhaust:
DIY cowl induction
DIY v-mount Ebay intercooler with DIY charge plumbing
Tial-Q BOV
DIY gutted 1999 manifold (no more VICS)
1100cc (each) Bosch EV14 injectors from Fuel Injection Clinic
Port water injection (8 GPH total, DO recirc style pump, Aquamist high-speed valve controlled by Adaptronic)
BEGI S4 tubular manifold
Garret GT2871 turbo, 0.64 A/R, Anti-surge compressor housing (ATP Turbo)
BEGI SGDP, stainless
Full Enthuza 3" stainless exhaust with high-flow cat

Drivetrain
Lightened 1.8L flywheel (inertia ring removed)
ACT XTSS clutch (flywheel and pressure plate balanced as an assembly)
Mazdaspeed 6-speed transmission
Torsen with 3.63 gearing (sweetness)

Cooling:
EBay oversized radiator (DIY v-mount)
Spal 11" low profile fans with DIY cowl
DIY Coolant reroute. Thermostat regulated heater core loop, dual oil-to-water oil cooler sandwich.
Fully ducted between radiator and nose

Electronics:
Adaptronic ECU (parallel, controls everything but A/C, alternator, and cruise).
DIY Toyota COPs
Fresh NGK BKR7EIX (Iridium IX) plugs gapped to 0.030"
Innovate LC-1 WBO2 (logged)
Innovate TC-4 Thermocouple Reader (logged),
Thermocouple in exhaust flow, located in exhaust collector before turbine inlet
Electronic Boost Controller (Adaptronic controlled) with Manual boost controller in parallel (hybrid)
DIY electronic detonation can with input into stereo. Bosch knock detector.
Asus EEe PC tuning laptop
Lots of gauges

Dyno plots to follow soon. Wish me luck.

Last edited by ZX-Tex; 06-16-2010 at 01:00 PM.
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Old 06-16-2010, 11:16 AM   #2
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INNNNNNNNNNNNNNNNNNNNNNNNNN

for results

OMG I'm getting antsy already
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Old 06-16-2010, 11:59 AM   #3
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11.5:1 afr, conservative spark considering you have 180* pickups. You also want 11.5:1 on enrichment. If anyone disagrees with you, they're wrong.
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Old 06-16-2010, 12:06 PM   #4
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Quote:
Originally Posted by hustler View Post
11.5:1 afr, conservative spark considering you have 180* pickups. You also want 11.5:1 on enrichment. If anyone disagrees with you, they're wrong.
Agreed, thanks. I am shooting for 11:1 - 11.5:1 especially at higher boost levels, say above 10 psi. Considering the monster injector size that should be easy to do. I am not going super aggressive/marginal extract-that-last-2%-of-power on the spark table. I do not want to risk knock if there is a WI failure. I am making this very clear up front. This is a South Texas DD, not a dyno queen.

Trey are you going to be in the area? You should drop by.
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Old 06-16-2010, 12:12 PM   #5
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Sweet, I'd be interested with the numbers!
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Old 06-16-2010, 12:30 PM   #6
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IN for results. Sounds sweet.
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Old 06-16-2010, 12:35 PM   #7
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Nice! Definitely 300+
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Old 06-16-2010, 01:04 PM   #8
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Quote:
Originally Posted by ZX-Tex View Post
Trey are you going to be in the area? You should drop by.
I'm either crewing for a chumpcar race or going to OKC for flooding party.
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Old 06-16-2010, 01:16 PM   #9
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In for updates!
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Old 06-16-2010, 01:20 PM   #10
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Good luck bro! In for results.
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Old 06-16-2010, 04:35 PM   #11
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Is .030 a tight enough plug gap?
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Old 06-16-2010, 04:40 PM   #12
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.030 should be fine with COPs.

It's about time we see some results from your awesome build! I've had a personal interest in how this will do.

I'm interested in seeing what happens with the .64 A/R on the hotside.

Good luck!
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Old 06-16-2010, 04:42 PM   #13
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So far 0.030" has been fine. No blowout up to 18 psi with the COPs. If it does I'll regap them, only takes a few minutes, although the plugs will be hot
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Old 06-16-2010, 06:54 PM   #14
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Nice!! In for results mang.
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Old 06-17-2010, 05:26 PM   #15
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You're gonna like it!
Stephanie
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Old 06-17-2010, 07:45 PM   #16
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K so where's these numbers?
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Old 06-17-2010, 07:54 PM   #17
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Old 06-17-2010, 08:05 PM   #18
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Hey man, my buddy has a truck if you got stranded.
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Old 06-17-2010, 08:31 PM   #19
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I'll cut to the chase
~290 RWHP @ 18psi. Corrected only for altitude, added about 10 HP. I guesstimate ~340BHP. This is on a Dyno Dynamics dyno, so presumably it would read higher on a Dynojet. Water injection is off.



This is with conservative timing, about 14 degs advanced @ 18 psi. There is a lot more there with more boost and timing but I like my engine, trans, and diff in their current state. It's pretty quick, spins the tires in third @ 50 mph.

EDIT: Forgot to mention the AFR was 11.5:1.

Last edited by ZX-Tex; 06-17-2010 at 11:29 PM.
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Old 06-17-2010, 08:44 PM   #20
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******* awesome.

230ish WTQ at 4K RPM, and it does'nt drop velow that until about redline, Peak is what 255 or so?

On a dead-safe tune that you can drive like you stole it every damn day.

Nice.
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