I don't always tune n/a cars, but when i do, i make sure they belch black smoke
 

Can someone explain this to me?

TuningDRight Refocuses on the Naturally Aspirated NC TAKE 2 - MX-5 Miata Forum

Why are we making an n/a motor run that rich?

https://www.miataturbo.net/attachmen...ine=1379965667

Because he has no idea what he's doing?

I like that it made a whopping 7whp more than the stock BP that Emilio just posted about. Very good.

Wow, its surprising to see an M.net thread where someone that ISN'T a prominent poster here refuses to suck Jay's balls.

When regular m.netters are hip to the bullshit, you know it's getting thick.

I think Wooo has a great future in politics, though. I'm still not entirely sure what the fuck he was on about.

I dont like when people talk about gearing on a dyno (especially a dynojet). I stop caring about what they have to say after that.

1. Wow, never go to m.net. Those guys are 'tards.
2. Interesting that the stock tune also went mega-rich (emissions?). In fact, looks like the tuner just tried to mimic the stock curve and didn't otherwise tune fuel.

im sure all he did was bump timing a degree or two and charge $300

i herd 11:1 afr maeks mad torques

Yo dawg, I made 180 ftlbs in 3rd gear and 206 in 4th gear on a dynojet with a car with a roots blower on the same day within minutes of each other. Shits legit.

That dude is advertising an NC tune that makes less than my OEM VVT swap on MS3? Seriously?

I really liked comparing it against this: [NA] 135whp with stock NA8 long block - MX-5 Miata Forum

https://www.miataturbo.net/attachmen...ine=1379972777

I really want to choke both Wooo and the TDR guy for being so stupid.

He's one of the "Golden Thirteen" over there. One of those that posts in every thread no matter what the topic is, and is the foremost expert on all things. What he says is LAW over there no matter how stupid it is, and is never wrong about anything.

I've actually had several conversations with the admin there about the 20 or so posters that seem to dominate the place with their holier than thou attitude.

Whoa dude! That's WAY above 11:1 AFR. Shit's gonna' blow for sure! M.net says so.

I love that dude's reasoning: the car runs rich stock, so running it even more rich "tuned" is okay

I like the direction that thread has taken. Now multiple posters are saying that discussing AFR's, tuning, and reliability constitute "trolling", and that all they care about is seeing dyno results.

very legits especially considering that a dynojet works by multiplying the mass (weighted drum), acceleration (wheel speed) and the distance (circumference), then dividing that product by time (gearing/wheel size variable) multiplied by 550.

The real truth is that I tuned it.

Hopefully that explains everything. :party:

Dann

The dyno graph isnt upside down.

Yes it is.

Dann

It would be for you, we see things right side up here. :giggle:

Nah, its the right way up from here so it must be upside down over there.
See?

https://www.miataturbo.net/attachmen...ine=1379965667

Dann :D

if you tuned it, it would be making 7523 ft-lbs and be posted upside down.

wasn't there another issue with an STP dyno posted here? Oh yeah, it was another TDR car when he posted here and we didnt give a fuck.

Haha!

Colin Hay is performing tonight over here in Largo, Florida. I wondered if he would be more comfortable playing guitar while standing on his head.

That is the TUNING section, there will be no discussions of tuning!

You KNOW it.

:dealwithit:

By the way I asked for some measured data on VVT over there.

Is VVT usually capable of being tuned as opposed to just switched on and off at different RPM? I was under the impression that all VVT ran from oil pressure on a solenoid, or is that Oldschool now?

What components allows the VVT angle to be changed as opposed to open and closed?

Dann

the stock ones.

... That doesn't explain anything at all.

Cheers,
Dann

vvt is not vtec. It normally works with some sort of mechamism that allows the angle of the cam to change relatively to the cam pulley.

I understand that fully, its usually powered by oil pressure and that pressure is controlled with a solenoid, I just cannot think of how the 'new modern' way of doing it that allows it to be stepped in angle, as opposed to naturally sit in one setting on a stop, and then have oil pressure push it to the stop a few degrees around.

Dann

the solenoid turns on and off very quickly, just like boost control you dont think an ebc has only wastegate pressure or ALLOFIT do you?

True variable VVT (IE, not an on/off switch) has been around for quite some time.

No, but having pulled apart VVT setups before I just dont see that accurately controlling angle, I mean, against something as irregularly shaped as a cam at xyz rpm and you are just going to PWM it to a specific angle with constantly changing oil pressure?

Dann

Awesome, do you know how it works?

Dann

Yes, because closed loop controls are awesome.

I don't know how it works on the NC, because i don't have an NC, and therefor, i don't care.

Lol.

if someone knows or has a link to some pics Id be very interested, I have an NC racecar parked 4 metres from me right now, but I dont really want to pull it that far down and risk having to replace seals and shit just to understand.

Dann

sounds similar to honda's i-vtec





I'm trying to find the video I saw once that uses pneumatic valves which allows all valves in the head to be independently controlled from each other unlike a camshaft. It's a true Variable Valve Timing system. Pretty neat stuff. Just can't remember what the video was titled


EDIT: Found it

I'm guessing it's probably different from Toyota vvt-i that was around on the BEAMS motors.

That's exactly what it is, I can see how with small orifices that could be PWM controlled. Fair enough.

Thanks,
Dann

Its probably similar to the VVT on the newer ford duratech motors.

With small orifices slowing the change in angle and good PWM a system similar to how honda works could be used.

Fair call.

Do we know if they are tightening the LSA to get more power towards the top end?

NC is intake cam VVT only?

Dann

I love how the original M.net post added estimated crank horsepower numbers. Just to make it look more impressive.



Also, bumped to third page for some cool pneumatic cam-less valvetrain.

Thread direction change is win.

I found a rare clip of a m.net tuner in action




Brace yourselves for the majestic being you are about to witness














https://www.miataturbo.net/attachmen...ine=1380046083

My car has a retarded tune, but at least my AFRs are above 12. (black bumper is rainbow; exhaust backfires are magic)

And that's what weirded me out the most. My MX6 is "tuned" in probably the worst way imaginable, would make most of you cringe if you saw it in person.

But even my AFRs aren't that bad.

My favorite part was the guy saying the extra fuel was to keep the cat cool. Because we all know throwing gasoline at a hot object is the best way to cool it.

HOLY SHIT you just inspired to invent a new thing.


E-Cool Exhaust Injector
"Keep Your Cats Cool with the E-Cool Exhaust Injector!"

^

1. inject exhaust into your engine with DEI.
2. inject fuel into your exhaust with EEI.
3. ???
4. Profit.

:bowrofl:

I just sprayed my monitor with Diet Pepsi. What kind of injection is that?

that would be aspartame injection.

I could have sworn you throw in extra fuel to HEAT the cat. This is why cars are rich during warmup: So the cat gets to temp faster and starts working on cutting emissions sooner.

Really? Apart from the obvious choke thing?

Are cars exempt from testing in my places for a certain time period after cold start?

Dann

no place will test a cold car ever.
has to be completely up to operating temps and most will have you idle it for like 10 minutes before even putting it on the rollers/sniffer

That's probably why the emissions lines are always so damn long. I can't imagine a car not being to temp by the time it makes it to the front, unless the driver is turning it off.

So why is brain mentioning extra fuel on cold start for the cat, is he being facetious?

Dann

huh?
No, he is on point: all oem cars are tuned to run relatively rich on startup to heat up the cats faster. Many newer cars even have a "smog pump" which is basically an air pump that blows into the exhaust stream or heads resulting in more crap flowing through the cats on a cold start and heating them up faster.