@18psi do you still tune turbo miatas?

 

Congrats on getting it started! Someone was just asking about 18PSI yesterday and someone said it might be easier to reach him via email? Not sure who the go-to remote tuners are now. There are a ton on Facebook, but I'm not sure who would vouch for any of them.

 

Current tune and first start datalog if someone smarter than me wants to take a look

 

Car is idling really high (2k) even with the IAC disconnected and throttle screw all the way in (clockwise). Can I assume this is a vaccum leak post TB, where are the main spots to check?

 

Yes has to be a leak somewhere. Check for a leak post throttle body. Some areas could be PCV port not connected, injector seats, loose throttle body, or loose manifold bolts cold do it.

 

It ended up being the IACV, frequency was wrong (95 MS on 99 IACV) and the range I found for my iacv was 20-40 which seems a bit off but it idles fine. Took it for a first drive and the blowoff sound made me *** a little in my pants

 

Listing the fixes I've found for all my problems so anyone who stumbles on this might find something:

High idle (2k+) even with the IACV disconnected doesnt mean the IACV's bad. If using NB IACV on NA megasquirt (DIYPNP), fix the frequency. Enable test mode, find lowest PWM% to allow engine to start. Enable closed loop (with PID all 0) and set range 10 degrees lower to 10 degrees higher. Car will idle, tune that **** after the motors broken in.

Some amazon tps have the 3 pins in different order. use a dmm and be smart before cashing out on a new one (im broke)

NA throttle cable can fit NB throttle without modification if you only put in one bolt on the throttle cable bracket, tilt it back and hit it with a impact driver.

Now I need to find a mysterious oil leak and let autotune do its job and hope my 5 speed doesnt **** itself behind a built engine efr 6258

 

Can someone change the thread name to college income instead of high school? i make less money lol

 

Heard a depressurizing hiss while moving it onto blocks and there's oil on the close side of the turbine housing (low mount) and dripping down the block. Definitely not coming from the headgasket, only happens under pressure so I'm pretty sure its spraying from somewhere. Any ideas?

 

Turns out the turbo oil feed line was touching the manifold and melted through. Redid the AN line and heatshielded it, leak seems to have resolved. Cars driving really good but I'm staying off the throttle (still taking it up in RPM) for a 100 miles probably. Next thing to deal with it coolant, I havent burped the system yet so hopefully that fixes all the overheating issues.

 

Nice work man! Get us some pics!

 

Burped the coolant nose up and it ate more than a gallon more of distilled water so i’m hoping that solves the overheating at idle issue (car would get up to 197 then cool to 185 quickly at idle). I haven’t pushed it on the street yet but the fatass track speed definitely does its job.

 

engine bay pic also

 

Oil pressure is weirdly high on cold start (~65) but drops to 30 when warm using straight 30wt.

 

Good work man. I remember those first times hearing the BOV and then hearing the flutter when I deleted the BOV for a bit.

65 PSI cold idle seems about right for this time of year. I'll see about 60 PSI at idle and closer to 80 or 90 when driving with cold 15w-40.

Ask Fire to pray for your 5 speed and maybe it'll hold up as long as his did

 

This 5 speed is holding on with its life. Hasn’t driven for 2 years and comes back to life behind a built turbo 6258

 

Took it for a drive tonight and it sounded different, there was a rattle from the front and the turbo didn’t flutter but let out a whoosh. I also never made more than 100kpa so pretty logically something in the pipings come loose badly.

 

any ideas?

 

need help asap, i’m assuming a 36-2 shouldn’t be loose? I can’t actually turn it but it has play (fluiddampr). no play in crank bolt.

 

That sound is terrible but I think you figured it out. No, absolutely not, your trigger wheel should be firmly mounted onto the fluidampr. I believe it's sandwiched on there with a backing plate and 4 allen bolts. Which 36-2 are you running?