My dyno day
 

So I finally got the car to the dyno! :)

Started off bad running into problems with a choke when we went into boost. I had no idea about the overboost protection setting so it took awhile before we found out that was the problem, but it was all uphill from there.

We ran out of time tonight and the owner told me to come back tomorrow and we'll finish it up. I'm lucky I was hooked up with this guy through a buddy cause he's letting me stick around and help out tuning the car so I can learn. Basically he's doing the driving and I'm doing the computer work. I'm actually liking it. At first I was like fuck megasquirt and tuning, but I'm starting to learn so its alot of fun.

Tomorrow the plan is to finish the tune we're on now, then do a emissions tune, and then a high boost tune. Right now as it sits I'm making 221hp and 200tq, and that's on the wastegate only, no MBC hooked up. Sits right around 8psi but spikes to 10psi or at least it seems. Tomorrow we are going to hook up his boost gauge to verify.

*Does anyone else have an issue with a hiccup right around 3800-4200rpms? It seems like no matter what we do (lean or rich) it still hesitates right at the same spot. Any advice?

Strange that the hesitation wouldnt tune out. How is your plug gap and what plugs are you using?

Great numbers, I bet its fun.. I cant wait to see what it makes on high boost.

Yeah the hesitation is way better than it was, but numbers up or numbers down it still hesitates right at the same spot. The plugs were at .34, then we dropped them to .30 or .25, I forget which. The plugs are the common BKR7E's. Its funny, I had them memorized without even realizing it when I went to the parts place to pick them up.

Thanks man, I cant wait to see what it'll make closer to 15psi. :) Cant say if its fun though, not yet at least. Its still up on the machine, I'm leaving it overnight. Right when we were closing up his shop a guy dropped off a 427 cobra that is fucking MINT. I will be sure to take an assload of pictures tomorrow.

o.0 haven't driven it yet!?! Holy shit tomorrow should be a fun day for you indeed. As for your misfire, i wish i had more insight. GL tomorrow.

It's a long shot... but on my MS-II, I had it switching VICS at 5,000 rpm, and I had a hickup which wouldn't go away. Turned out, when it turned off the coil (at 5k), it would send a back-emf which would momentarily wig out the board. Putting a "flyback" diode on the valve helped.

Perhaps there's some inductive load you need to tweak, too?

My car apparently had the same issue...here is the thread my car's PO started about the problem...

https://www.miataturbo.net/forum/t19690/

Huh, oh yeah. Is there software averaging? Perhaps turning it up...

Awesome! :bigtu: Thanks for the info, gonna read up on that.

221/200 so far? Oh man you will be grinning tomorrow:D

Those are good numbers for 8-10 psi how much spark are you running up top?

Not sure what you're running, but I had similar hesitation issues with bad plug wires. Don't rule out the easy/stupid answer.

I know man I hope so! Tomorrow couldn't come fast enough! :laugh:

Yeah I'm happy with the numbers so far for sure. I want to be somewhere in the 250ish zone, but at the same time winter is on the way and I don't need to go crazy right now on the numbers. I might try and see what the most I can make is, then drop a few psi. Spark table isn't really touched other than dropping everything up top to 20 and everything down bottom between 20-30.

The wires are 2 years old new, but have 0 miles on them. They are stockers, NGK blue. I have Gospeed's set so I can always try them if it comes down to it.

It'd be weird since they're brand new, but it'd be the first thing I'd replace and check. I've had too many wild goose chases trying to track down a stumble only to find out it was my plug wires.

Glad to see you around Vash :) Car is looking good.

In the car at the dyno right now :)

We just changed the accel settings to all 0's and re-tuned the fuel table. No more hiccup. I love this forum! :bigtu:

As the car sits its making 224hp and 205tq. Only change from yesterday was the accel wizard stuff and a little on the fuel table.

Going to do some more runs now :)

this time, post a real plot!

Just turned up the MBC to 13psi :)

Made 250hp and 231tq

Now going to play with the 10psi map some more. So I was incorrect before, I was actually at 9-10psi making 221. We are going to try and bring that number up now.

Holy shit man...good stuff.

Waiting for a real plot of your target psi now.

Make sure you don't bump your timing more than 20 up top. Can you do me a favor and ask him how much he would charge me for like 3-4 pulls. And doing my own tuning. Pm me a price

I took a quick glance through your build thread but I didn't find what I was looking for. What GT28 are you using and 1.6 or 1.8?
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The car is SICK. I couldn't describe the feeling I have right now. Totally different car.

So now I have a map for 10psi and one for 13psi. We also made a map so I can pass emissions.

Big thanks to everyone on this forum that is awesome as fuck. If it weren't for alot of you guys, I wouldn't have gone this far. :bigtu:

Now its time to take a shower and then go drive this fucker for a bit! :)

and this is a 1.6L? This puts mine to shame...

Very damn good for a 1.6.

All your blood/sweat/tears paid off man.

WOW ! nice numbers I want a bigger Turbo :sadwavey:

I have it written down which T28 it is, but I don't remember off the top of my head. Yep, this is a stock 1.6. And the car was on the dyno for over 6 hours total, and my damage was $650. It was well worth the money, I learned a shitload, and the car is fantastic. Really, I couldn't be happier. :)

Awesome numbers man, congrats. The tune must be spot on, It took 16 psi for me to get 242. Please let us know when you can exactly what turbo you are running. Id also like to take a peak at your spark/fuel maps.
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[QUOTE=Vashthestampede;483660]
We just changed the accel settings to all 0's and re-tuned the fuel table. No more hiccup. I love this forum! :bigtu:
QUOTE]

Good deal!

great thread...its making me excited to start my own build thread..:D

Congrats, how much power were you making before the dyno??

Nomie

gj vash those are respectable numbers and scot yeah your cheapo turbo build has been a disapointment to me but ohwell your still cool.

Damn, good numbers. Hope you enjoy the car vash.

Oh and make us some videos!

Thanks guys! The car is great! So far I am more than happy with the power. :)

On the highway its like a joke when I pass cars now. I can spot an opening and be through it before anyone even knows whats going on. Then when I look in the rear view everyone is just about out of my sight. Granted I need to be easy with it cause I don't need anymore tickets, but its hard to not drive the car fast. I actually had to tell myself out loud last night to "stop it". :laugh: Once my camera mount is here I will take some videos for you guys. :bigtu:

I did notice I have an exhaust leak somewhere by the turbo/dp area. I'm going to see if I can find it and fix it today. Its a little aggravating hearing it sputter like a shitty honda right when I hit the gas. Once boost kicks in though you cant hear it anymore over the turbo noise.

Also, it took 2 tries to get it started this morning. Not sure how cold it was, maybe in the high 30's low 40's. I'm wondering if I should play around with any settings to help the car out in the cold NE mornings.

Here's my spark map and fuel map.

that is a very curious ing/fuel map...

I'm going to be totally honest here, so don't take this the wrong way.

With an ign table like that and those numbers on a 1.6L at 13psi...it really makes me think correction factors came into play to make a customer feel good about spending 6 hours on the dyno and paying $650...I'd really be careful with a ign map like that, pretty much zero retard as you spool and at peak torque, and then a very advanced map in boost.

Look how you compare to artieparty's absurdflow setup on a 1.8L at the same PSI:

http://www.boostedmiata.com/gallery2...serialNumber=1




Wasn't much of a build but a swap of turboz. Old one will go back in the spring.

I get what you are saying, that he could be fluffing me with high numbers, but I don't think that's the case. He's pretty much the most respected tuner in the area. He doesn't fuck around with cars like this either, he plays with expensive toys that are track and drag monsters. He's a friend of a friend and that's how I got the hook up. I highly doubt he would BS the numbers to make me feel good. He knew I was happy with 220, he was more into making bigger numbers than I was! lol

He told me the timing is where its at. He was explaining to me about some other cars he had worked on and that once you get the timing right, your numbers will start going up dramatically.

True, but too much and things go boom...I've seen it and experienced it, just throwing out my :2cents:

Just for kicks, what do you think needs adjusting? Do you think my 35's and 30's are too close to where I start making boost?

I was talking to the guy that owns the Honda shop in our complex about the car and he said next time he has a tuning session hes going to give me a call so I can bring it by and throw it on the dyno (mustang) and compare numbers.

Today was the first time I actually pressed down on the gas, rather than milk it, and the son of a bitch threw me into the seat. I remember what 180hp felt like, this feels like a whole new world.

Be careful Joe. I melted a piston, Neo melted a piston, Sav now melted a piston. Too many people melting pistons these last few months to get crazy with timing.

And I agree with brain, your timing looks AGGRESSIVE to me too.

Specially at torque peak! Joe don't forget you have a stock motor and timing will kill the motor as fast as boost will. If you wanna swing by my house this weekend I'll show you my map

Which part of the timing map would you suggest I lower some numbers?

Whats the Garrett # of your T28 I'am looking to upgrade.
Thanks

In these areas.........
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You have more timing at peak boost than most have before/after

or the entire stock timing map....which peaks at 35* IIRC.

why only to 6000 rpm?

How exactly do you find out what's safe, other than waiting for your pistons to melt? EGT? Would the map be safe with water/meth? I don't think I've ever seen 35s where he has them.

That's one way to do it:giggle:

I told him to please not go over 6500rpms during any pulls. I was nervous enough having it on the dyno, I didn't want to take any chances going any higher.

I might pull some timing just to be safe, even though he assured me it was good to go. The car pulls strong and feels good. I don't hear anything that sounds bad, but then again I don't know if I would hear anything until it was too late.

First order of business on the list tomorrow is to pull the turbo and wastegate out again and fix this fucking exhaust leak. The car looks mint, but sounds like shit. Figures the only gasket I left in the exhaust system is the one that blew. I can feel the puffs of air coming from where the wastegate mounts to underneath the manifold.

Yeah...gaskets are fail.


Damn fine numbers. For the T28 compressor maps I've seen I'd say it's easy for you to be in high enough efficiency at 13psi to make those numbers when combined with a bigass intercooler and your huge (for a 250whp 1.6L) exhaust.

Your peak torque never gets over 230...which is to be expected with stock manifold...and tapers off just like everyone else's.

For a street car all that really matters is how fast it is to you. You might consider backing out a little timing for a daily map and save that dyno tune for when you need it, or considering a little "super blue" as a safety blanket. Can't hurt.

If you oil pressure gauge starts freaking out in boost, you has issues.

here's the map that has yet to fail me for 4 years or so.

http://boostedmiata.com/timing/nov-09.jpg

Wow, low advance at idle. Well, ok, not really. :-)
Yeah, I feel you always should - accel is only for fixing accel specific settings.

I dunno enough about actual tuning to have a good idea of what to look for, but I will say one thing - I've gone through several sets of rods, the occaisional piston. Till I put on an EGT gauge and a knocksense. Since then, I've never really had to touch anything mechanical at all.

GET a knock sensor, and I keep an eye on my EGT's, and I can cruise at 17.5:1. :-)

I just got back from my first REAL trip in the car, about 100 miles to and from (had to put electrical heating cable on my GF's parents roof). The entire drive I was watching my oil pressure gauge, listening for an explosion, avoided getting run off the road by a semi, etc etc. The car seems happy. :) It cruises fine and has power whenever I ask for it.

I will say this though, the car used alot more gas now with this setup. I just filled it up before I left and I'm already at 3/4 of a tank. I'm going to need a part time job just to afford fucking gas! :vash: And good thing the hood pins are going in tomorrow because the son of a bitch hops up and down like a slut on cock.

I agree I need to get with it and pick up a knock sensor and a EGT gauge. I already ordered the laptop mount so I can cruise around and have the megatune screen right beside me when I want it. :)

What would you estimate your gas mileage to be? No reason you can't get high 20's.
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100 miles on roughly 7 gallons? 14mpg.

On a freeway cruise (or, with the Miata Club on a "agressive drive") I'll get 28-30 mpg.

Driving to work, I get ~17.

It's not the tune, it's the right foot.

Yeah, I wouldn't say I was driving like an ass or anything. Pretty much 60-70mph the entire time, with a few exceptions where I got on it a little just to play around on the open road. I was pretty much in 5th at 4000rpms 75% of the drive. I can just tell that this new setup is using way more gas than the greddy setup did. But like they say, if you wanna play you gotta pay right. :)

If it's rich when cruising I don't care what you do with your right foot, you will get shitty gas mileage.

Vash, what are your cruising afr's?
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I hate to say this.......but. :facepalm:

My LC1 isn't working properly, so I have no idea. I need to recalibrate it. After I installed it I never did a free air calibration so it just always says 14.9-15.0.

I'm going to add that to tomorrows to do list. Don't have the jack here to get to the sensor, otherwise I'd do it now while its fresh in my head.

Yea, you need to and then report back your idle and cruising afr's. I'm betting it's rich. You should be getting well over 200 miles to a tank of gas with normal driving. 200 miles to a tank is somewhere around 20 mpg's.

Get us a datalog as well.
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3/4 or 1/4 left?
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My right foot gets me about 13mpg when i drive on the street. 6 and below on track :D