I don't always tune n/a cars, but when i do, i make sure they belch black smoke - Page 4 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 09-24-2013, 10:06 PM   #61
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Got a copy of TDR's tune





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I don't always tune n/a cars, but when i do, i make sure they belch black smoke-mega_tune5000_02.jpg   I don't always tune n/a cars, but when i do, i make sure they belch black smoke-mega_tune5000_04.jpg  
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Old 09-24-2013, 10:08 PM   #62
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disable everything and idle at 1250......like a boss

if the car isn't getting 2 mpg from running 9:1afr at 100kpa you're obviously not making any power
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Old 09-25-2013, 12:09 AM   #63
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lol
I run leaner at 29psi
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Old 09-25-2013, 12:10 AM   #64
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Duh guys, he uses Sniper not mega tune. Which is why his tunes cost bullets.
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Old 10-01-2013, 09:36 PM   #65
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OEMs historically ran pig rich at full load to keep EGTs in check, primarily to ensure the cat would still be functional at the end of the 150k-mile emissions durability period.

The cooler EGTs also make things easier on exh valves, valve seats, turbine wheels/housings etc. This also allowed OEMs to be, er, more cost-conscious in their material selections while still meeting durability targets.

Nowadays the focus on fuel economy has made this fueling strategy undesirable in the OEM world.
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Old 10-02-2013, 10:55 AM   #66
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so what do they do instead? advance timing a boatload so the combustion happens in the cylinder instead of the manifold? there's only so far you can go before timing + AFR = detonation.

I mean you can push it further with DI and stratified charge... but that's like 90's honda tech.
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Old 10-02-2013, 11:01 AM   #67
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Quote:
Originally Posted by y8s View Post
so what do they do instead? advance timing a boatload so the combustion happens in the cylinder instead of the manifold? there's only so far you can go before timing + AFR = detonation.

I mean you can push it further with DI and stratified charge... but that's like 90's honda tech.
But too much advance means NOx emissions. I think a lot of it comes with the cam timing pulling some exhaust gases back into the combo chamber (or just running an egr) to keep the egts reasonable.
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Old 10-02-2013, 11:55 AM   #68
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You guys are idiots, what makes power? Combustion of fuel. Ergo, more fuel=more power. I run at 100% injector duty cycle in all cells for max hp.
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Old 10-02-2013, 12:00 PM   #69
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Quote:
Originally Posted by Leafy View Post
But too much advance means NOx emissions. I think a lot of it comes with the cam timing pulling some exhaust gases back into the combo chamber (or just running an egr) to keep the egts reasonable.
They're not talking about idle and closed loop cruise. In cl cruise (where most smog tests are performed) most oem's have big advanced spots and run stoich.
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Old 10-02-2013, 12:11 PM   #70
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Quote:
Originally Posted by y8s View Post
so what do they do instead? advance timing a boatload so the combustion happens in the cylinder instead of the manifold? there's only so far you can go before timing + AFR = detonation.

I mean you can push it further with DI and stratified charge... but that's like 90's honda tech.
Nowadays they suck it up and use more expensive bits that can withstand higher EGTs. Modem gasoline turbo applications typically run 980 deg C, with some running 1050 deg C.

Of course, there's a temp drop across the turbine, so the cat sees somewhat less. Still screaming hot though.
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Old 10-02-2013, 01:36 PM   #71
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Quote:
Originally Posted by albumleaf View Post
You guys are idiots, what makes power? Combustion of fuel. Ergo, more fuel=more power. I run at 100% injector duty cycle in all cells for max hp.
What if I only want 80% doody?
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Old 10-02-2013, 01:38 PM   #72
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Quote:
Originally Posted by hustler View Post
What if I only want 80% doody?
Then you need to get it from a bird.
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Old 10-04-2013, 10:33 PM   #73
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Quote:
Originally Posted by 18psi View Post
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.
FWIW: Most newer cars (before that system was done away with) use a one-way check valve between the intake tract and the exhaust manifold. The closing of the exhaust valve vs. escaping exhaust gas creates a vacuum, which pulls in air to the exhaust runners.


Running rich is more about proper atomization of fuel with a cold engine/fuel supply, than heating up the cat. If rich AFRs did heat up the cat significantly better, OE manifolds wouldn't be cast with cats in them. Remember, a cat is a fine honeycomb, so the turbulence/restriction of the shape alone does most of the heating.
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Old 10-05-2013, 12:06 AM   #74
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Rich? My Trionic 7 Saab retards the timing until the cat is up to temp. Later combustion = more heat leaving the cylinders. Far more effective at toasting your cat in the morning. In the free tuning software suite, there's even a checkbox to disable the cat light-off timing retard.

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Old 12-12-2013, 02:23 PM   #75
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Cant believe I missed this thread, I love following this guy.

You guys always ask why someone would read m.net, I'll tell you why, this guy is hilarious and I regularly check to see if hes posted anything new. I wish he posted more.

We had this same thing happen on a forum I used to moderate. People who understand tuning will know this guy is full of ****, people who bought his tune will say its the best. He will blow up a few engines, owners will say it wasnt the tune. Eventually he will learn something from the people telling him hes wrong, or major shenanigans will happen and he'll go away.
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Old 12-12-2013, 03:06 PM   #76
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HAHAHAHAHAHAHAHAHA

Quote:
Originally Posted by Tuning Done Rong
before anyone ask.

I did not post the AFR's so that we won't have to endure a "physics/business and advertising" lesson, and seeing that we are making 2 times as much power as anyone else... we are going to label the AFR's a trade secret.
So we will stick to providing results.

AFR's are not richer than a stock MX5 runs, is a non issue.
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Old 12-12-2013, 03:44 PM   #77
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open ve map.
99.99 everywhere
???
Profit


#tradesecret
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Old 12-16-2013, 04:02 PM   #78
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Quote:
Originally Posted by concealer404 View Post
HAHAHAHAHAHAHAHAHA
oh my god aahahahahha
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Old 12-16-2013, 04:30 PM   #79
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Psssshhhh.

You newbs.

Everyone knows the worse mileage you get, you must be making more power. That is why the LEDs are "green" for GOOOOOOOOOOOOOOOOO! on the rich side of the wideband!

So, logically -

More Rich = More Power = More Rich "Tuner"



I made a pictorial diagram of how to tune a car :

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I don't always tune n/a cars, but when i do, i make sure they belch black smoke-11408154174_2235532f09_o.jpg  
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Old 12-16-2013, 04:39 PM   #80
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I think the biggest reason this guy gets away with all his stupidity is because the ecutec maps and logs are not something you can easily pull from your ecu and upload to the interwebz for people to look at and discuss.

If and when this becomes the case, he's gonna need to figure out what he's doing REAL quick or people are gonna know better than to go to him.
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