sixshooter

iTrader: (12)

A/C is connected. Needs ducting, fluids, and a few bolts to run. I'm sure pdexta will be joining me at the track this summer. What about you?

pdexta

iTrader: (17)

I can't wait to take it down the 1/4, but realistically I doubt I'll be ready before summer. I'd love to meet you guys there. I've got a little pdexta that's scheduled to arrive in July so hopefully I can get up there before then, I don't feel like I'll have much time afterwards.

Greasemonkey2000

iTrader: (3)

Read from start to finish and all I have to say is Wow! Scott if your anything, you are persistent and looks like it has payed off because it looks great and sounds like its on its way to running even better than it looks. Keep up the great work!

pdexta

iTrader: (17)

Since I was getting random intermittent sync loss issues on the cam sensor I spent a few weeks miserably failing at trying to get the car set up on a crank sensor. As seen: https://www.miataturbo.net/mspnp-55/...l-setup-77167/

Last weekend I gave up on the crank sensor and rewired the stock cam sensor so the car will run at least. I'm still getting the sync loss errors occasionally, but at least I can drive it.

Took a few crappy pictures last weekend with a friend's gto.

miata2fast

iTrader: (2)

I see South Florida's DOT workmanship has improved.

pdexta

iTrader: (17)

I took the car out last night and got in a few runs. The car ran pretty well for a change. It's still spooling really slow which kills it in 1st/2nd gear, but once I'm into 3rd it stays high enough in the powerband that it's not a big issue. The timing sync issue seems to be healing itself, it's only showing up with I start the car or load a tune. I'm hoping that's normal, I never really paid attention to it until I started having my recent issues.

I ran a turbo/built motor/bandaid 1.6 miata. I took him pretty easily, probably 4 car lengths from 20-100. He's got a megasquirt and injectors ready to go in that I'm going to help him install next weekend.

Then I got beat up on pretty good by a bolton/cam LS1 Camaro. I'd run him before dead even in my NB so it was nice to see how far off I am now. The first run he got me easily, the 2nd run I jumped him a little bit (which helped to compensate for the slow spooling) and he ended up a car ahead from 20-100. Videos:





The last run was against a bolton/tune 2013 V6 mustang. I was probably 4 car lengths ahead of him.

Really hoping it continues to run decent so I can clean up the tune and add some more boost. I'm at the point that I'm ready for this thing to work right or blow up so I can part it out and move on with something else.

Greasemonkey2000

iTrader: (3)

Car sure looks good! What is with those roads?!

pdexta

iTrader: (17)

It's just some well hidden deadend sideroad. I'm assuming they used it for cleaning out the stripe machines, or practicing, or when changing colors, or someone was just bored/drunk/high. Whatever it was, it makes for an interesting picture spot.

Fireindc

iTrader: (13)

Cool update, i hope you get it running right as well.

Curious though, what would you get if this thing blew up and you parted it out?

pdexta

iTrader: (17)

I don't think I'd replace it, I'd just downsize. I daily drive an RSX that I'd probably end up messing with a little more but for the most part I think I'm just done with cars in general.

sharkycarlos

Cool setup, Im doing allmost the same build with but with a garrett t3/t4 .63 Ill be looking very closely to your build. Mad props to you.

pdexta

iTrader: (17)

^ Thanks man, I appreciate it. I'm so glad the stupid thing is finally coming together.

I swapped out a wastegate spring to add a little more boost. Green was last Sunday, Red was tonight. Still needs a lot of work, but it's amazing how much better it feels with the extra ~4psi.

Fireindc

iTrader: (13)

NICE man, that's more like it. Amazing how much better the torque curve looks as well, not quite perfect but much more respectable than before.

sixshooter

iTrader: (12)

Did you adjust the AFRs? It goes leaner above 6k.

Yeah, a 64whp jump is more than most supercharger guys get with a whole m45 kit added to a stock Miata, and you got it by adding 4psi to your WG spring! What is the current pressure?

pdexta

iTrader: (17)

Yeah, I added fuel up top. This was my first tuning run at that boost so it was a little leaner than I like, I prefer to keep WOT toward 11:1 rather than 12:1. You can see the boost curve in the screenshot; it's still coming in late, then creeping up, peaking at 210kpa and 240kpa respectively.

pdexta

iTrader: (17)

I drove the car a good bit last weekend. At one point I rolled into it and heard some crazy horrible detonation. I pulled 5 degrees of timing and it was still exactly the same. Yesterday I filled with E85, adjusted my fuel map, and it's still detonating. Plugs 2 and 3 look lean, a good bit leaner than 1/4. The car also started to stumble occasionally with AFR's going lean.

I'm suspecting it may be a wiring issue with my COPs since it looks like cylinders 2/3 are the issue. I'm thinking maybe a wire is working its way loose and they're firing really weak or something. Next time I have a chance I'm going to pull the COP harness apart and redo it, hopefully I find something screwed up and it hasn't done any damage to the motor.

Also spent a ridiculous amount of time scraping sound deadening out of the trunk. Several hours work, a bag of dry ice, and a can of goo-gone later and the car is now 7oz lighter, great victory!

18psi

iTrader: (76)

'grats on the trunk and switching to corn

if they're lean I'd suspect the fuel system rather than the cops. if your ignition isn't firing or firing weak you'd go pig rich not lean

sixshooter

iTrader: (12)

I believe a spark miss will actually register as lean on the wideband because the oxygen coming into the engine is not consumed by the combustion process.

pdexta

iTrader: (17)

A fuel issue was my first thought as well. Actually the first thing I did was swap in a new fuel filter and checked fuel pressure, which is still right at 70psi where I set it.

After looking at the plugs I felt like the cylinder pairing pointed more toward a spark issue. It's possible that 2 injectors on opposite ends of the motor are clogged or something, but that seemed unlikely. Then considering how shoddy my wiring/soldering skills are and how many times I've pulled the COPs off to swap plugs I was leaning toward that being the issue. If I don't see anything in the wiring I'll definitely pull the injectors and look at them.

Thanks again for the input on the E85. I was surprised how easy it was to just fill up and go on my way.

18psi

iTrader: (76)

You may be right. But if it was weak wouldn't it also blow out like crazy and basically hit a wall? That's what we were getting on Ryans car past 21psi.