Chiburbian's 01' Lots of potential, no follow-through build - Page 19 - Miata Turbo Forum -Boost cars, acquire cats.

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Old 05-19-2015, 05:21 PM   #361
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I'm going to try. Non-recirculated means it's a crap shoot. I am going to wire open the wastegate though and keep my foot out of it.

Honestly what I am most worried about is those O2 sensors. Theoretically they have been on (as my stock ECU has been powered up and hopefully running them) so hopefully they aren't burned out.

If I pass, I plan on removing the stock ECU from the car entirely. Do I also have to remove the stock 02 sensors or will they survive living in my exhaust unpowered?
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Old 05-19-2015, 05:32 PM   #362
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Disconect the vac hose to the BOV and it should stay closed. You won't be boosting anyway so it's not needed.

O2 sensor must be powered up or you will kill them quickly. If you're going to remove the ECU, pull and plug the holes for the sensors.
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Old 05-19-2015, 09:41 PM   #363
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Quick update. Yes, coupler popped off intercooler. I'm going to try an either get a slightly longer coupler or a 45 degree bend perhaps to make it a little more smooth going on.

Working on trying to figure out how I'm going to fix/complete the ducting.
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Old 05-26-2015, 11:57 AM   #364
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Spent about 10-12 hours this weekend ducting my front end.

Definitely made an improvement. I did get up to about 213 degrees but that was at stop and go straight speeds of no more than 35 mph and fans caught it just fine. Also, temps went down to 196 after light load cruising at 50 mph sustained. I'd still like it cooler but I won't really expect to see that until I go to a 96-99 head gasket.

EDIT: I'm still not liking my cruising temps at 60+ mph sustained. I got up to over 210 at light cruising. I can't afford to throw any more money at it so I am going to just be gentle with it for now. Future upgrades might be a cross flow radiator and fan package. Shame because I have probably $400 in my current radiator and fans but if they don't work for me, they don't work.

Last edited by Chiburbian; 05-27-2015 at 06:54 PM.
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Old 05-27-2015, 06:50 PM   #365
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I did a shakedown pull this morning to see how far off my boost control was running the new beta code with the "bias table".

5th gear pull starting at roughly 2200rpm

RPM PSI
2940 7
3013 8
3083 9
3200 10
3273 11
3310 12
3432 13
3565 14

I didn't mean to go to 14psi but I am still tuning so I allowed my cut off to go to 200kpa figuring that I wouldn't hit that number till later in the RPM band. I am pretty happy with that spool especially considering that I am hitting this at 72% duty on the EBC. That isn't to say that 72% isn't my "max duty" but still, I am pretty happy with that.

More tuning to come.
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File Type: msl 2015-05-27_09.40.36.msl (103.5 KB, 35 views)
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Old 05-29-2015, 01:47 PM   #366
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Pretty sure I am really close to having this boost control thing whupped!

I got close with the bias table by hand and then I turned on simple mode to let the PID loop try and keep me at target. From there I used the values "found" by simple mode to further adjust my bias table. I am actually lowering my target boost 5kpa at a time to find the proper duty for each row in my bias table. I can see that my torque falls off after peak so I am raising the target boost level to try and keep it flat. So far so good!

The image below is just me with a target of 180kpa to see how well my car sticks to it. So far so good! I am really enjoying the car now.

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Old 05-29-2015, 02:03 PM   #367
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that looks really solid

good job sir
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Old 05-29-2015, 02:12 PM   #368
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Having a wastegate that actually works helps quite a bit. I'd like to say the porting made the difference but honestly with as bad as that wastegate was I can't say for sure. Also, I switched from 39mhz to 19.5mhz AND I set my "Fully Closed" to 87%. I will work on getting a more precise number later but that is my best guess looking at my logs. Now I just need to get on a dyno for an hour or so and flatten out my torque curve and I will be great.
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Old 06-05-2015, 08:17 PM   #369
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Car was taken down for emissions.

Sequence:
* Removed ID1000 injectors and replaced with stock
* Removed all vacuum lines from manifold that went to things like BOV and Megasquirt.
* Left BOV top port to atmospheric
* Picked up 2.75" 45 coupler and put it on the front of the turbo and connected it to MAF. Let IAC dangle near inlet of MAF. No filter on MAF at this time. I need to find one that fits. I only plan on driving the car to clear the status checks and get tested so I'm not too worried.
* Disconnected waste gate flapper
* Plugged back in stock ecu.

It started great but was going VERY lean at idle. I drove it to start to clear codes and probably 1.5 miles from home I threw my first code. P0300 Random misfire. I drove a circuit to hopefully get the rest of the sensors up and ready and swung by sears and picked up a cheap OBDII Scanner (which is when I learned of my P0300). After I reset my code I drove home but the code didn't return. I don't know if I did enough to cause the ECU to again try to check the misfire status, but the car was running MUCH better by this point. I don't know what would cause my car to misfire like that but then fix itself... Any ideas? Injectors that just haven't seen fuel for a year or two?

Provided I can get the rest of the car to pass it's readiness checks I plan on getting tested tomorrow. I have ONE item pending:

I accidentally left the injector bushings on the cowl of the car (the ones between the injector and the manifold) and they blew away.

Are they the same for my stock injectors, or where else can I get a set?
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Old 06-06-2015, 11:10 AM   #370
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No pass.

Catalytic converter not ready.
Purge not ready.

I thought I went through enough driving situations but I guess not :(

Still no codes though.
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Old 06-06-2015, 12:31 PM   #371
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If you have a phone with bluetooth, for like 5 bucks you can download an App called Torque, and with it you can see rediness codes/RT codes and the Emmissions monitors while you're driving around.
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Old 06-07-2015, 09:29 PM   #372
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Drove to work this morning, let car sit all day.

Check it when I left work and all readiness checks except purge were complete. Drove it home, now only three are ready!

Getting Code P0128 - low coolant temperature?
P0304 - Cylinder 4 misfire.

I don't know if P0128 will cause a car to not pass emissions. Perhaps? I cleared them both out, I will try again tomorrow. The car hasn't been running right and have had lots of misfires. I am going to try plugs tomorrow. Either that or maybe my injectors are bad. I am using a set off a spare motor I got. I don't know where my original injectors went :(
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Old 06-07-2015, 10:30 PM   #373
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In TX, any fault codes pending or active = no pass.

For P0128, do you have a thermostat lower than 195? If so, swap or block part of radiator. I had a 180 and just blocked 3/4 of the radiator to get it to run a bit higher.

In my experience, more than 50% of the time misfire = new plugs fixes it. Gap them at .040" or so and factory heat range and I bet the missfire disappears. If you have a lazy injector a larger gap will fire off a leaner mixture without a misfire so it will help. With my IGN1A race coils .044" gap I could idle at 19:1 AFRs... Crazy. I now run .030" gap though.
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Old 06-09-2015, 03:17 PM   #374
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Pulled the plugs last night and #4 spark plug had a shattered insulator. Swapped in a fresh set of plugs and everything is great...

Except that P0128 came back again.

This is so puzzling to me because until recently I had a problem COOLING the car. Matter of fact I kinda still do...

Anyhow I just got off the phone with the testing facility and they said that if the code is not causing a check engine light I should pass. I'm going to head to give it a try on my way home!
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Old 06-09-2015, 09:54 PM   #375
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Good news... Passed with no codes.

Then drove about 200 meters to enter in the DMV address to my GPS and I threw a check engine light for too lean.

No care! Got plates renewed and I'll start reassembling it tomorrow. Good times are here again!
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Old 06-09-2015, 10:40 PM   #376
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Bwaahahah! Congrats I guess? Now go make boosts
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Old 06-10-2015, 03:39 AM   #377
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It's been a long and winding road. Glad to hear you have inspection behind you.
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Old 06-22-2015, 06:24 PM   #378
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So I am not as busy or interested in the Miata at this point because of a really positive change in my life.

Cliff notes: 18 years ago I fell for (over breakfast) a girl in the Marine Corps before I realized she was married. Even after I found out, I stuck around and we became super good friends. No funny business - I even picked her husband up from the airport when he arrived at our duty station.

I kept in touch over the past years and about three years ago she contacted me and told me that her marriage was over, but my (guilty) joy was soon displaced by sadness when I found out that she had another man that she was very serious with. I bared my soul and told her that one of my lifelong disappointments was that I never got to try to see if we could work as a couple. I missed her the first go-around, I missed it the second, and while I was not wishing any ill-will on her current relationship, if the opportunity ever arose we owed it to ourselves to spend some time together to see if we could be partners in life and not just friends forever.

A week and a half ago I took a leap of faith and traveled to see her. By the end of the weekend she was my girlfriend and we have been unbelievably happy ever since. My car is running great aside from a strange tendency to die when coasting to a stop (which looks to be too little fuel and I am working on that). That said - priorities are in flux right now. The priority is getting the two of us together geographically as much as possible and plan for a migration for one of us.

So - progress might be slow, and it is possible I may have to part out or sell the car at some point. Cars are just things and life and love is more important. I'll post a pic when I get a chance. No cheese-cake at this point. I may convince her at some point believe it or not.

In the meantime - enjoying the car and planning for the future. Though, it seems like it will be less of a focus going forward.
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Old 06-23-2015, 12:11 AM   #379
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I totally get that. I rarely drive my car any more and it's not high on the list, but it's a "nice to have" thing. Family and relationships first.
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Old 06-23-2015, 12:14 AM   #380
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Congrats
I agree - this hobby is Priority #2
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