91 BRG 1.8BP MK turbo build
#23
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![](https://www.miataturbo.net/attachments/build-threads-57/170234-91-brg-1-8bp-mk-turbo-build-80-20160430_174520_73a95903cd9828510b7c7588ece90ffc0e531f16.jpg?dateline=1462084047)
I ordered the FM 1.8 swap kit, but I deleted the 1.6 TB adapter because I wanted to keep the 1.8 TB. The throttle cable left a bunch of slack even with the cable adapter because there is no TB adapter in between the IM and TB. I had to make an extension plate.
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****EDIT******
I had my wires crossed. switch the red & grn wires.
![](https://www.miataturbo.net/attachments/build-threads-57/170235-91-brg-1-8bp-mk-turbo-build-80-20160430_094157_f9232f795d8b01ddc8b38e4f58265fc615750736.jpg?dateline=1462084286)
I'm intending to run the car using the OEM 1.8 variable TPS. I rewired the 1.8 TPS using the 1.6 wires as pictured. I hope this works...
I had my wires crossed. switch the red & grn wires.
![](https://www.miataturbo.net/attachments/build-threads-57/170235-91-brg-1-8bp-mk-turbo-build-80-20160430_094157_f9232f795d8b01ddc8b38e4f58265fc615750736.jpg?dateline=1462084286)
I'm intending to run the car using the OEM 1.8 variable TPS. I rewired the 1.8 TPS using the 1.6 wires as pictured. I hope this works...
Last edited by wackbards; 05-12-2016 at 12:01 AM. Reason: wiring mistake
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I gotta improve the cold start. Man, it sucks. I also need to sort out the acceleration enrichment. I'll post some of my butt map/logs after I start up the new motor.
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Home » Shop » Connectors / Harnesses » Sumitomo » 2 Way Plug Assembly for Japanese applications (Connector + Lock), Green
This looks right for the IAC connector! Hard to find on the forums, as most people retain the 1.6 TB & IAC.
This looks right for the IAC connector! Hard to find on the forums, as most people retain the 1.6 TB & IAC.
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The above connector is the correct fit, but the OEM pins are slightly wrong. Since I didn't have the correct pins on hand, I modified the OEM pins. Here are the mods I made to make the pins seat & lock. In each pic below, I've completed one pin in the step described so you can compare before & after:
![](https://www.miataturbo.net/attachments/build-threads-57/170731-91-brg-1-8bp-mk-turbo-build-80-20160506_173831_f9273f6f6eeaf93842f52b4d4acf094eb3bac189.jpg?dateline=1462591310)
Squish in the side tabs so they are flush
![](https://www.miataturbo.net/attachments/build-threads-57/170732-91-brg-1-8bp-mk-turbo-build-80-20160506_174742_1dba9c4f9743ef0e33adb25c92208255827cdb07.jpg?dateline=1462591310)
File the tags flush on the nose
![](https://www.miataturbo.net/attachments/build-threads-57/170733-91-brg-1-8bp-mk-turbo-build-80-20160506_175653_95a14a7594858422d6dc36c1fae6ef500e11786c.jpg?dateline=1462591310)
Hog out the locking detent so it extends about 1/16" closer to the nose.
This all took about 5 minutes. Not as clean as using the correct pins, but it gets the job done. If I had to do it again, I'd just buy the connector with the pigtail already included.
![](https://www.miataturbo.net/attachments/build-threads-57/170731-91-brg-1-8bp-mk-turbo-build-80-20160506_173831_f9273f6f6eeaf93842f52b4d4acf094eb3bac189.jpg?dateline=1462591310)
Squish in the side tabs so they are flush
![](https://www.miataturbo.net/attachments/build-threads-57/170732-91-brg-1-8bp-mk-turbo-build-80-20160506_174742_1dba9c4f9743ef0e33adb25c92208255827cdb07.jpg?dateline=1462591310)
File the tags flush on the nose
![](https://www.miataturbo.net/attachments/build-threads-57/170733-91-brg-1-8bp-mk-turbo-build-80-20160506_175653_95a14a7594858422d6dc36c1fae6ef500e11786c.jpg?dateline=1462591310)
Hog out the locking detent so it extends about 1/16" closer to the nose.
This all took about 5 minutes. Not as clean as using the correct pins, but it gets the job done. If I had to do it again, I'd just buy the connector with the pigtail already included.
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Had to do a bit of a reroute of the coolant...reroute. I had the hose drooping low, and there was no way I could burp the line. Here's the new routing. I spliced in the OEM 1.6 radiator hose.
![](https://www.miataturbo.net/attachments/build-threads-57/171026-91-brg-1-8bp-mk-turbo-build-80-20160509_190046_e32b6e8811199e6ba03170f2ebe7ef488a881f6e.jpg?dateline=1462847999)
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I'm sorting out my map for the FF610 injectors I ordered in February. Based on the recommendations from this thread, I'm running the following:
dead time = 1.179ms@13.2v
battery correction = .144v/ms
I've multiplied my static flow published on the cards I received with the injectors by 1.04. Here are the injector serial numbers, published flow, and corrected flow
serial # published corrected
f6ak43 609cc 633.36cc
f6ak49 614cc 638.56cc
f6ak55 609cc 633.36cc
f6ak62 610cc 634.40cc
the average corrected flow is 634.92cc. I input 634cc into tunerstudio.
does this seem sane?
dead time = 1.179ms@13.2v
battery correction = .144v/ms
I've multiplied my static flow published on the cards I received with the injectors by 1.04. Here are the injector serial numbers, published flow, and corrected flow
serial # published corrected
f6ak43 609cc 633.36cc
f6ak49 614cc 638.56cc
f6ak55 609cc 633.36cc
f6ak62 610cc 634.40cc
the average corrected flow is 634.92cc. I input 634cc into tunerstudio.
does this seem sane?
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I did it with the engine out. I had tried running the hose lower down closer to the alternator. With that big dip in the hose, you get a big air pocket it the line that will never come out.
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Everything is buttoned up, and I'm calibrating my tune. I've got the TPS wiring fixed & the TPS is calibrated now. The only things left to do are to tweak the Hz rate for the IAC, test my injector & spark sequencing, & fire it up! I should have enough time in the next couple days to get it running...
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Car started right up first crank. Only tuned the idle cells, because I couldn't get the clutch to operate. Hopefully there's just air trapped...
Had to move the idle VE up about 25% from 57 to 72.
Had to move the idle VE up about 25% from 57 to 72.
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Fiddled with the clutch pedal, and got it to engage. I've auto tuned up to about 3k. Gotta chase down a noisy exhaust leak somewhere.
I'm having to add a lot of fuel to my VE table.
I'm having to add a lot of fuel to my VE table.
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Ugh. 4 days on the road, and I have two symptoms: low voltage, and the thermostat gasket for the OEM thermostat neck block of is weeping.
I guess I'll pull the alternator & get it tested. Sure hope I'm not hunting grounding demons...
I guess I'll pull the alternator & get it tested. Sure hope I'm not hunting grounding demons...
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OK, so the alternator ground post nut had walked loose. Easy fix there. Cranked on the coolant neck cap, but my gut says it's a crap gasket.
Trickle charging the PC680 battery back up. It was reading at 11 volts by the time I got home.
Trickle charging the PC680 battery back up. It was reading at 11 volts by the time I got home.