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Old 02-02-2023, 07:41 PM   #26
monkeyposeur
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I love a fast bugeye wagon! Nice work!
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Old 02-02-2023, 08:24 PM   #27
K3rm1tth3fr0g
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Quote:
Originally Posted by Dave D. View Post
That thing's going to run like an AMG by the time you're done!

Hah. One of these days when it's not super wet outside we've got to meet up again and I can take you for a drive with it on ethanol...Or maybe you can just teach me how to ski


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Originally Posted by monkeyposeur View Post
I love a fast bugeye wagon! Nice work!

Thank you! I like the bugeyes for being a little ugly
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Old 02-03-2023, 08:24 AM   #28
Smoblikat
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Quote:
Originally Posted by K3rm1tth3fr0g View Post
Hah. One of these days when it's not super wet outside we've got to meet up again and I can take you for a drive with it on ethanol...Or maybe you can just teach me how to ski





Thank you! I like the bugeyes for being a little ugly

Bugeyes arent ugly! Real rally cars have round headlights IMO.


What is the benefit of running the Link ECU over the stock one? I bought a car with a Link (tuned over floppy disk....) and want to just put an OEM one back in. Is there any benefit to the link for tuning? Seems like it has a few features and things, but nothing that really stands out to me as super important for a street car.
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Old 02-03-2023, 10:31 AM   #29
K3rm1tth3fr0g
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Quote:
Bugeyes arent ugly! Real rally cars have round headlights IMO.
The good kind of ugly

Quote:
What is the benefit of running the Link ECU over the stock one? I bought a car with a Link (tuned over floppy disk....) and want to just put an OEM one back in.
Do you happen to know which specific Link ECU it is? I would imagine if it uses a floppy disk you are on the G1 or older. Typically those old school aftermarket ECMs aren't as powerful as the modern remapping software and firmware available for the OEM ECU.

The 02-05 ECU is 16 bit however and has some limitations in the way of memory that makes enabling some of the features a bit tricky. Some people have success using Carberry to reflash the 16 bit ECUs which is a custom ROM that enables flex fuel along with other features unsupported by Cobb that many on the 02-05 Cobb platform would like to utilize. Regarding Carberry, in my opinion and after speaking with numerous tuners I consider it largely a workaround and not an ideal longterm solution. You/your tuner have to make compromises when deciding what to include in your ROM if you go that route because the space is limited.

I'm aware of people remove barometric compensation in order to add motorsports features/flex fuel to a daily driver and as someone who routinely drives into the mountains, that makes no sense to me - but to each their own.

Quote:
Is there any benefit to the link for tuning? Seems like it has a few features and things, but nothing that really stands out to me as super important for a street car.
My G4X handles multi fuel blending, adds a CAN bus, and can handle practically anything I can throw at it without a problem. For example, when switching to my GT35 build down the road we are going to be adding per cylinder AFR compensation via a wideband in each exhaust runner which should stabilize fueling a good deal more than a single WB would be able to.

So are there any benefit to the link for tuning? Absolutely. Compared to open source/Cobb your engine will run better and be safer assuming your tuner is familiar with the platform.

Do most people need this for the street when an Accessport is cheaper? Not unless you want to run flex fuel or plan to outgrow the AP in a meaningful way with your setup.

Last edited by K3rm1tth3fr0g; 02-03-2023 at 10:43 AM.
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Old 02-03-2023, 11:34 AM   #30
Smoblikat
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Quote:
Originally Posted by K3rm1tth3fr0g View Post
The good kind of ugly

Do you happen to know which specific Link ECU it is? I would imagine if it uses a floppy disk you are on the G1 or older. Typically those old school aftermarket ECMs aren't as powerful as the modern remapping software and firmware available for the OEM ECU.

The 02-05 ECU is 16 bit however and has some limitations in the way of memory that makes enabling some of the features a bit tricky. Some people have success using Carberry to reflash the 16 bit ECUs which is a custom ROM that enables flex fuel along with other features unsupported by Cobb that many on the 02-05 Cobb platform would like to utilize. Regarding Carberry, in my opinion and after speaking with numerous tuners I consider it largely a workaround and not an ideal longterm solution. You/your tuner have to make compromises when deciding what to include in your ROM if you go that route because the space is limited.

I'm aware of people remove barometric compensation in order to add motorsports features/flex fuel to a daily driver and as someone who routinely drives into the mountains, that makes no sense to me - but to each their own.

My G4X handles multi fuel blending, adds a CAN bus, and can handle practically anything I can throw at it without a problem. For example, when switching to my GT35 build down the road we are going to be adding per cylinder AFR compensation via a wideband in each exhaust runner which should stabilize fueling a good deal more than a single WB would be able to.

So are there any benefit to the link for tuning? Absolutely. Compared to open source/Cobb your engine will run better and be safer assuming your tuner is familiar with the platform.

Do most people need this for the street when an Accessport is cheaper? Not unless you want to run flex fuel or plan to outgrow the AP in a meaningful way with your setup.

Thanks for the great response. I dont know the exact model ECU thats in my car, though I think its documented in the little book I got, so i can probably find out. I have no intention of running flex fuel, dont really care about power, and I will never be on a track. I still have my Tactrix cable from one of my old bugeyes, maybe someday ill get around to putting an OEM ECU back in, I just want something stable and simple that makes at least 170WHP.
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Old 02-03-2023, 04:38 PM   #31
K3rm1tth3fr0g
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Quote:
Originally Posted by Smoblikat View Post
Thanks for the great response. I dont know the exact model ECU thats in my car, though I think its documented in the little book I got, so i can probably find out. I have no intention of running flex fuel, dont really care about power, and I will never be on a track. I still have my Tactrix cable from one of my old bugeyes, maybe someday ill get around to putting an OEM ECU back in, I just want something stable and simple that makes at least 170WHP.
Not a problem!

Open source tuning via Tactrix is a cheap and accessible way to get your foot in the door tuning, thats for sure.

You'll have no trouble at all hitting 170WHP

The 02 WRX will even do that on a stock tune on some dynos
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Old 02-17-2023, 08:24 AM   #32
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Lovely to see the wagon. Also nice to see someone who has spent so much time throwing parts and money into one, though I think I have you beat by 2 parts and $20! My new idear is to go to a 3 spoke STI steering wheel. How dramatical was that?
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Old 02-19-2023, 10:10 AM   #33
ARKTiKPENGUiN
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Kermit, I just realized what you mean by refusing to start. My car did this exact thing after driving to the last event of the year last year... Car had a full fuel tank, perfect fuel pressure, spark, and everything (tested with the ECU Outputs!!). When I went to re-start it after it was just running perfectly, the car would NOT start. I cranked it over for 15 seconds 4 times and not even a pop out of the exhaust.

The car didn't smell of fuel, normally it would if you cranked that long... so my thought is it's holding the injectors closed like the throttle is fully open? I left the car where it was, my buddy took me to get my daily, and we came back and the WRX fired up in a single crank like nothing had happened. This also happened when I was at work with the WRX and leaving for the day. Wouldn't fire up but had plenty of fuel... So this was in both cold and warm start scenarios where it had been tuned.

The only common denominator with both of these situations is that it was raining out pretty hard. I have a carbon hood with louvers cut out above the battery, so I'm wondering if that was the potential issue. We know water + electricity is not fun lol.

I've since decided to relocate the battery to the trunk with a Wiring Specialties Fuel Pump kit as well, and I need to update ecu firmware to make use of the new Flat Foot Shift Coding. I'll keep tabs on if it happens again afterwards.
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Old 02-19-2023, 10:11 AM   #34
ARKTiKPENGUiN
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NASIOC has a habit of double posting now... lol

Last edited by ARKTiKPENGUiN; 02-19-2023 at 10:11 AM. Reason: Double Post
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Old 02-19-2023, 02:00 PM   #35
K3rm1tth3fr0g
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Link G4X flex tuned
02' EJ205 20G 6MT wagon

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Quote:
Originally Posted by Unabomber View Post
Lovely to see the wagon. Also nice to see someone who has spent so much time throwing parts and money into one, though I think I have you beat by 2 parts and $20! My new idear is to go to a 3 spoke STI steering wheel. How dramatical was that?
I think you may still have me beat... We'll have to reevlaute when I finally get around to building a 2.5L though My fuel setup is a bit more stout since I built it for a GT35 on ethanol.

All that's left for your wagon in terms of power seems to be a flex tune on a standalone... Link makes a nicely priced offering compared to Haltech and MoTeC since everyone and their mother is jumping ship from Cobb at the moment for fear of what gets turned off next.

Oh do you have a carbon fiber driveshaft? I am a big fan of mine.

I like my STi steering wheel, but the original MOMO wheel is pretty sweet too... I do find myself missing the MOMO from time to time. I have an East Detailing wrap that isn't perfect but is okay for what it is, my 04 STi wheel is slightly different than the 05-07 wheel the wrap is deigned for.

If you take your time you can get a nice result, but I'd probably skip this step if your OEM STi steering wheel is in good shape though.

Finished up the momentary switch I'll using for launch control on my EJ20 setup and latched launch control when I go catless. Fun to start tapping into the motorsports features of this ECU




Quote:
Originally Posted by ARKTiKPENGUiN View Post
Kermit, I just realized what you mean by refusing to start. My car did this exact thing after driving to the last event of the year last year... Car had a full fuel tank, perfect fuel pressure, spark, and everything (tested with the ECU Outputs!!). When I went to re-start it after it was just running perfectly, the car would NOT start. I cranked it over for 15 seconds 4 times and not even a pop out of the exhaust.

The car didn't smell of fuel, normally it would if you cranked that long... so my thought is it's holding the injectors closed like the throttle is fully open? I left the car where it was, my buddy took me to get my daily, and we came back and the WRX fired up in a single crank like nothing had happened. This also happened when I was at work with the WRX and leaving for the day. Wouldn't fire up but had plenty of fuel... So this was in both cold and warm start scenarios where it had been tuned.

The only common denominator with both of these situations is that it was raining out pretty hard. I have a carbon hood with louvers cut out above the battery, so I'm wondering if that was the potential issue. We know water + electricity is not fun lol.

I've since decided to relocate the battery to the trunk with a Wiring Specialties Fuel Pump kit as well, and I need to update ecu firmware to make use of the new Flat Foot Shift Coding. I'll keep tabs on if it happens again afterwards.
Glad I am not the only one with this issue. I ignored my tuner's advice (stupid) and flashed the newest firmware when I was doing some updates to the map and setting up LC. Thankfully nothing broke, and I was pretty sure that would be the case because I didn't see anything major in the firmware notes that would bork the existing tune, and nothing at all regarding the no start issue.

I've only seen this issue one singular time total in the months I've been driving the car - hopefully we can get to the bottom of it.

On an unrelated note, I sent in some oil that I had from an oil change back in August of '22 and the results are mostly favorable. The water is from storing it in an interim container before sending the sample off. And I am guessing the copper is from the rebuilt Garrett GT30 based 20G that was installed while using this oil, as all other wear metals are reporting well. Going to take another sample this week prior to tuning.




Touch up tune scheduled for this coming week assuming the weather allows me to get to my tuner. More updates to come

Last edited by K3rm1tth3fr0g; 02-19-2023 at 02:09 PM.
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Old 02-19-2023, 06:15 PM   #36
nwood1976
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Really digging your wagon, nice work. Great to see the bugeye wagon love, I've had mine for 18 yrs now and it still makes me smile.
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Old 02-19-2023, 06:40 PM   #37
K3rm1tth3fr0g
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Originally Posted by nwood1976 View Post
Really digging your wagon, nice work. Great to see the bugeye wagon love, I've had mine for 18 yrs now and it still makes me smile.
Thank you! Been quite a journey to get here.

Always happy to see/hear about other bugeyes still getting love.
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Old 02-22-2023, 09:32 AM   #38
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I just love that this project keeps getting updated and documented.
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Old 02-22-2023, 03:53 PM   #39
HughGordon
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What do you like about the carbon fiber driveshaft? What's noticeable compared to the stock one?
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Old 02-22-2023, 09:01 PM   #40
K3rm1tth3fr0g
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Originally Posted by Homemade WRX View Post
I just love that this project keeps getting updated and documented.
No shortage of updates

Just got back from dropping the car off at the tuner.

Quote:
Originally Posted by HughGordon View Post
What do you like about the carbon fiber driveshaft? What's noticeable compared to the stock one?
The CF shaft was installed alongside the 20G, 6MT, and Link ECU + E85 tune so comparing directly to my previous setup is pretty worthless.

I'll likely have more to say after launch control is all dialed in. I've been spending the last little bit letting the brand new OEM clutch fully break in - aka no launches yet.
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Old 03-10-2023, 08:18 AM   #41
K3rm1tth3fr0g
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Small update: EJ205 still seems healthy at 72.5K.

Car is currently waiting on a new KB inlet coupler and then it should be ready for the touch up tune

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Old 03-12-2023, 02:58 PM   #42
Dave D.
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What is the goal for the touch-up tune? Just a little better dial-in?
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Old 03-12-2023, 03:35 PM   #43
K3rm1tth3fr0g
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Quote:
Originally Posted by Dave D. View Post
What is the goal for the touch-up tune? Just a little better dial-in?
Mostly fine tuning:

Turning on CL boost control
Turning on CL lambda in boost/over 4k RPM
Turning on long term fuel trimming
Tuning knock control for pump gas
Turning down boost target on pump gas (currently using same WG table as E85 - relying on fuel mass to primarily differentiate boost levels.)

Also checking alignment and tire balance from a shake I feel on my 04 STi wheels and A/S tires + warrantying KB inlet coupler.

Quote:
Originally Posted by K3rm1tth3fr0g View Post
After some fussing, I got some things working that weren't functioning prior - like gear detection, and my multi gauge shift lights. Also just got all the bits together to start wiring in a momentary switch for launch control Done (won't go too crazy with the ignition retard because I'm catted at the moment) and now that gears are detecting I may go in and add no lift shifting

Toward the end
start of February March I'll be heading back to my tuner for a touch up to adjust/add some more protections and corrections, and turn on some fun Link goodies.

Right now the tune is using simple open loop boost control with the 3 port and the TiAL 38mm gate but we are going to switch over to closed loop to hopefully spool a tad bit faster. Currently running 25% WGDC at WOT with the 13 psi spring and I am spooling right around ~4500 on the street using ethanol.

Additionally, we will be turning on and adjusting some more lambda correction features like long term fuel trimming that was added recently to the Link ECM. Also adding some other more time consuming features like CL lambda corrections during WOT - currently it's setup to transition to open loop lambda at 4000RPM. Getting the tune to be happy with AF corrections at low RPM/air mass and high RPM/mass can be finicky.

We didn't use the stock knock sensor during the original tune as I was not expecting to use pump gas very often and enabling it is a bit more work than just flicking a switch, but since I have been using pump slightly more than I anticipated and don't want to rely on ethanol for knock control - I turned it on and set it up and will be having the thresholds and gains dialed in on the dyno.

Last edited by K3rm1tth3fr0g; 03-13-2023 at 08:11 PM.
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Old 03-13-2023, 01:47 PM   #44
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What's wrong with the KB inlet?
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Old 03-13-2023, 01:59 PM   #45
K3rm1tth3fr0g
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Quote:
Originally Posted by HughGordon View Post
What's wrong with the KB inlet?
Coupler was just a bit overtrimmed during install and is riding the edge of the turbos comp inlet.

Passed a smoke test but wanted it to fit as it should.
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Old 03-13-2023, 03:46 PM   #46
Unabomber
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No carbon driveshaft for me. Was running lightweight steel for awhile, then went back to OEM. Local guy works in a driveshaft facility, so its an easy thing. The lightweight one had zerk fittings which were a pain during oil changes to grease, so I went back to OEM non-grease ones. Just added STI seats and OEM STI underbody aero panels behind side skirts. Rewrapped MOMO steering wheel is on the way and should be here tomorrow. I'm "done" for 2023 as those seats were a grip as I bought cherry ones which are farking hard to find these days.
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Old 03-13-2023, 11:03 PM   #47
K3rm1tth3fr0g
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Link G4X flex tuned
02' EJ205 20G 6MT wagon

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Quote:
Originally Posted by Unabomber View Post
No carbon driveshaft for me. Was running lightweight steel for awhile, then went back to OEM. Local guy works in a driveshaft facility, so its an easy thing. The lightweight one had zerk fittings which were a pain during oil changes to grease, so I went back to OEM non-grease ones. Just added STI seats and OEM STI underbody aero panels behind side skirts. Rewrapped MOMO steering wheel is on the way and should be here tomorrow. I'm "done" for 2023 as those seats were a grip as I bought cherry ones which are farking hard to find these days.
Maybe 2024 will be the year Ron jumps to a standalone ECU and flex fuel...

You'll finally have to upgrade that ole wally 255
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