From "stay tuned" to T U N E D !!

So I'm at the dealership getting the HPFP recall done today. More than likely it's just the ECU reflash, no big deal since the stock ECU has been in for quite some time There's a second part of the recall that calls for a new HPFP but my car more than likely doesn't get that because I've got no driveabilty issues, kinda wish I got a new HPFP out of the deal to be honest as I don't think this OEM is up to task because I feel that when my Stage 1 tune went in it couldn't keep up, maybe I'm "hoping" that was the problem....maybe

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Kicking around the idea of downsizing to 18's:

-lighter

-better offset (+45 v.+55 oem)

-more sidewall

-slightly less expensive, not really an issue

-style works with my cars "funky" style

Thoughts....
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Silly Rabbit said:
The rims you have now look better. Just me
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Well, if I keep them, they're going to the powder coater where the gray will be done in pearl black to match the lower trim bits and the machined pieces will get a darker tint, think newer M3/M4 Competition Package.

I appreciate your honesty

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The machined bits would be a little darker

My biggest want is +10mm for a more "flush" look but NO spacers, I'll never do it, 7-10 lbs less weight per corner would be nice too
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I do like the design of those wheels, they work well on the Elantra. But...........................I think the wheels you already have are so distinctive and cap off the whole N package.
 
Yeah I’m not a fan of the wheels you posted but if you like them let er rip. I love the look of the Kina N’s but in pictures you don’t notice flushes of wheels.

Thats a huge pet peave of mine and why I have real hard time of leaving wheels on stocks. Cant do it. I think it’s like swirls to some people. Never knew it was a thing till you notice or someone pointed out…. Then you can’t stop seeing.

Thats one thing chevy got right on Camaro but seem to not wanna address on Corvettes. The ford mustang wheels were bad with this too.


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The design of your car makes wheel choices difficult. All of those crisp angles in the panels give the car a distinctive, edgy look that doesn't always translate to wheels. This is all aesthetics of course and really only a choice you can make. Go with what you like. I tend to like more simple, open wheel designs. I pulled your car up on TireRack and played around for a minute to look at the options. These stood out to me.

MSW Type 40's

Moda MD32

On the more practical side, do you really want a 10mm change in offset? Won't they poke? My autocross wheels are the same width as OEM, but have 3mm less offset and a slightly wider tire. Even with only 3mm difference, I'm about 1mm from being flush. I like the fact it isn't 100% flush and lower body panels aren't getting sand-blasted with debris. 10mm would have me several mm outside the fenders. Every car's suspension set up is different. I'd just caution to make sure the fitment will work like you want.

I think you'll like the smaller wheels. 17" or 18" have always seemed to be the sweet spot for me. On my GTI I stayed with the OEM 18's but wet with OEM wheels saved over 10lbs a corner and the car was noticeable more agile with even that difference in weight. On my BMW when I swapped out my OEM 19's for the 18's I used for autocross, it transformed the car. It was quieter, more agile, and much smoother despite running barely legal street tires which should be horrible by design. I saved somewhere in the range of over 12lbs a corner in weight. I hated returning to my daily set-up after the weekends were over. The same for my BRZ now. By dropping from 18's down to 17's I haven't saved much weight (the OEM wheels are surprisingly light) but the extra sidewall has made the ride much smoother, again despite the barely legal tires which should ride like bricks.
 
Desertnate said:
The design of your car makes wheel choices difficult. All of those crisp angles in the panels give the car a distinctive, edgy look that doesn't always translate to wheels. This is all aesthetics of course and really only a choice you can make. Go with what you like. I tend to like more simple, open wheel designs. I pulled your car up on TireRack and played around for a minute to look at the options. These stood out to me.

MSW Type 40's

Moda MD32

On the more practical side, do you really want a 10mm change in offset? Won't they poke? My autocross wheels are the same width as OEM, but have 3mm less offset and a slightly wider tire. Even with only 3mm difference, I'm about 1mm from being flush. I like the fact it isn't 100% flush and lower body panels aren't getting sand-blasted with debris. 10mm would have me several mm outside the fenders. Every car's suspension set up is different. I'd just caution to make sure the fitment will work like you want.

I think you'll like the smaller wheels. 17" or 18" have always seemed to be the sweet spot for me. On my GTI I stayed with the OEM 18's but wet with OEM wheels saved over 10lbs a corner and the car was noticeable more agile with even that difference in weight. On my BMW when I swapped out my OEM 19's for the 18's I used for autocross, it transformed the car. It was quieter, more agile, and much smoother despite running barely legal street tires which should be horrible by design. I saved somewhere in the range of over 12lbs a corner in weight. I hated returning to my daily set-up after the weekends were over. The same for my BRZ now. By dropping from 18's down to 17's I haven't saved much weight (the OEM wheels are surprisingly light) but the extra sidewall has made the ride much smoother, again despite the barely legal tires which should ride like bricks.
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The Moda is

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Yeah, I really like that one too. They offer three finishes in that wheel. Did you see they offer a black with machine finish face similar to the BMW wheel you posted? I didn't see it until I posted and was about to close out the tab in my browser.
 
Desertnate said:
Yeah, I really like that one too. They offer three finishes in that wheel. Did you see they offer a black with machine finish face similar to the BMW wheel you posted? I didn't see it until I posted and was about to close out the tab in my browser.
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That would be the one out of the 3

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It's $1250 for the custom powder coat and tint on the machined part of the wheel face, they run sales sometimes and while that's not cheap it's a top tier company.

I'm thinking looks AND perf upgrades here with a new, 18" wheel but just kicking tires here...kinda

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See this wheel looks smaller due to that outer ring, plus I had to chose this color due to the machined w/ black accent not really showing up

This is just for for fun, I wish oem's weren't so conservative with offset but +55mm sucks
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These are both 18"
 
The images don't scale perfectly either. On a big screen, I notice the Moda's seem to show a little more sidewall than the wheel you originally chose. This on top of the design of the wheel, as you mention, make it hard to have a 100% side-by-side comparison.
 

Can someone please watch this video and explain to me how the info from data logging can possibly tell me why my car has partial throttle issues (when the tuned ecu is in) based on the info provided. All I hear is data log, data log, data log, I don't get it

Not to mention the price of the unit and tunes, all I need is 1, no need for updates, blah, blah, blah, just want 1 tune that eliminates octane learning and brings up the boost/timing a little and gives me the easy and safe 320 whp the car has in it, why it this so hard

Also, why does my buddy with his FiST have it so easy with his Montune? Just plug in, answer questions, upload and done...simple

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I've always thought people who can read data logs as the same kind of people who can code in assembler or machine language for SCADA control systems. It's a dark art, but hugely important.

Data logging overall is how tuners build/test their tunes. Well funded race teams do the same thing when getting a car ready for a race weekend and want to make sure the engine is running at peak performance. Or...in the case of the guy making the video, he wants to get really deep into every adjustable parameter of the engine because he geeks out on it.

In your case, getting the data logs while running your tuned ECU would show exactly where the problem is by showing what every sensor in the engine is reading at the time the problems occur. Is the engine leaning out? Is it retarding timing? What's happing to the variable valve openings? Data like that. It won't allow you to correct the tune, but it would show you the problem. By stepping through each recorded event over a period of time, someone who knows what they're doing, can read that data and fully understand what the engine is doing at any point in time. The data tells the story of your engine over a set period of time while the logs are running.

I've seen conversations on GTI, BMW, and now FT86 forums where guys will dump their data logs, describe their problem, and in a day or two someone else is able to analyze all that data and tell them precisely what is wrong and which variable to change to fix the problem in their custom tune. It's where software, mechanics, and engineering all come together. I understand the concepts and understand what they do from my years in the IT field, but making sense of the data is way over my head.

Until now, I've never know anyone to have issues with off-the-shelf tunes. Whether they are a piggy back or an ECU flash it usually goes well and the engines behave just like the tuner advertises. My only thought is the world of tuning Hyundai/Kia/Genesis is far younger than other platforms and there will be growing pains with some tunes being not quite right. There are companies like APR, Dinan, Cobb, Unitronic, and a few others that have been tuning German and Japanese cars since the 80's. Even the Fords are based on European engines which have probably been tuned since their days in the WRC. They have vast amounts of data and expertise based on tuning successive generations of engines and they know the quirks of how the automakers make those engines run. That is all still being learned with the Koreans. Until you get a few well established tuners in place the risk of getting a bad tune will be higher.
 
Desertnate said:
I've always thought people who can read data logs as the same kind of people who can code in assembler or machine language for SCADA control systems. It's a dark art, but hugely important.

Data logging overall is how tuners build/test their tunes. Well funded race teams do the same thing when getting a car ready for a race weekend and want to make sure the engine is running at peak performance. Or...in the case of the guy making the video, he wants to get really deep into every adjustable parameter of the engine because he geeks out on it.

In your case, getting the data logs while running your tuned ECU would show exactly where the problem is by showing what every sensor in the engine is reading at the time the problems occur. Is the engine leaning out? Is it retarding timing? What's happing to the variable valve openings? Data like that. It won't allow you to correct the tune, but it would show you the problem. By stepping through each recorded event over a period of time, someone who knows what they're doing, can read that data and fully understand what the engine is doing at any point in time. The data tells the story of your engine over a set period of time while the logs are running.

I've seen conversations on GTI, BMW, and now FT86 forums where guys will dump their data logs, describe their problem, and in a day or two someone else is able to analyze all that data and tell them precisely what is wrong and which variable to change to fix the problem in their custom tune. It's where software, mechanics, and engineering all come together. I understand the concepts and understand what they do from my years in the IT field, but making sense of the data is way over my head.

Until now, I've never know anyone to have issues with off-the-shelf tunes. Whether they are a piggy back or an ECU flash it usually goes well and the engines behave just like the tuner advertises. My only thought is the world of tuning Hyundai/Kia/Genesis is far younger than other platforms and there will be growing pains with some tunes being not quite right. There are companies like APR, Dinan, Cobb, Unitronic, and a few others that have been tuning German and Japanese cars since the 80's. Even the Fords are based on European engines which have probably been tuned since their days in the WRC. They have vast amounts of data and expertise based on tuning successive generations of engines and they know the quirks of how the automakers make those engines run. That is all still being learned with the Koreans. Until you get a few well established tuners in place the risk of getting a bad tune will be higher.
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The one thing I never tried was re-installing the tuned ECU with my stock plugs, even though the tune calls for 1 step colder plugs, I always wondered did the after plugs go bad enough with the MSD coils to affect partial throttle use but "clear out" at WOT

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