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Old 03-30-2016, 10:03 AM   #141
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Quote:
Originally Posted by 1999LFX View Post
Some encouragement for you guys:



Ran the car yeaterday at the DC SCCA test and tune autox. Car ran great, no issues whatsoever with over 30 runs. Throttle is very sensitive and very easy to pick up too much speed even on 205 series R compounds. Next task is going to be to step up to 275s.

Sounded awesome from outside the car. I'm running a tein monoflex suspension and Re-71r's, the same as last year, and there's no noticable change in the handling characteristics other than than lots more power. Still very nuetral, very balanced. All in, super happy with the swap.
The car revs up pretty quick, like a bike. Are you running an aftermarket clutch/flywheel or a stock combo?
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Old 03-30-2016, 12:31 PM   #142
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Originally Posted by Cujoel View Post
The car revs up pretty quick, like a bike. Are you running an aftermarket clutch/flywheel or a stock combo?

Stock Combo. Its pretty heavy. Almost dropped it on my finger during the install.
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Old 03-30-2016, 01:01 PM   #143
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Quote:
Originally Posted by Cujoel View Post
The car revs up pretty quick, like a bike. Are you running an aftermarket clutch/flywheel or a stock combo?
Didn't seem like going aftermarket was going to save me a lot of weight looking at how thick the Spec flywheel is to eliminate the dual mass design. Clamping force and disc material is surely better than stock, but my car is significantly lighter than a camaro, so decided to run a stock setup especially once considering the cost side. But yeah, even with what felt like a 40 pound flywheel/pressure plate/disc combo, it revs really quick and is super responsive. Would consider swaping to aftermarket if some better options became available or we burn up the stock setup.
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Old 03-30-2016, 01:12 PM   #144
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The stock setup is smooth now that we have the clutch adjusted just right. Such a great car to drive. Very impressive.
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Old 04-07-2016, 08:45 PM   #145
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Just had my first start up... WOO HOO! Now I just need to pull the motor and tidy up the wiring over the weekend and it is time to see what she can do! Thanks to everyone for all the help.....especially you Gooflophaze!
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Old 04-08-2016, 01:20 PM   #146
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Just had my first start up... WOO HOO!
woo-hoo indeed!
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Old 04-10-2016, 08:31 AM   #147
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Just a heads up - in my guage write up i listed pin 3 as the ground on the VSS connector. That was incorrect - updated image below.

Pin 1: pulse output
Pin 2: Ground
Pin 3: ignitition power

Anyway we can update the original post to prevent anyone from wiring this up wrong?


[QUOTE=1999LFX;1312249]

On the speedo, I haven't driven the car yet, so can't completely confirm this works, but you need to pick up the speed output and ground off the vehicle speed sensor. This is wires 1 and 3, respectively on the connector. Once you can drive the car, you will drive to the preset speed and set the speedometer to that speed, so you will need a gps unit or phone app or friend. One option is to just upgrade to the GPS speedo unit - not a bad idea and something I wished I had done. The speedhut gauges are compatible with other gps sending units, so still an option.

<br >
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Old 04-10-2016, 01:15 PM   #148
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Anyone able to verify the reference voltage for the VSS? I assumed it was 12v since it states run/crank.
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Old 04-10-2016, 02:10 PM   #149
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12v.

Good news is that we got the car tagged. Bad news is that we're still fighting for a VSS reading from the ECM. I snagged a J2534 cable and a 2 day subscription to GM's SPS to reflash the ECM.. turns out you can't. GM locked down what they called "off board" programming, so if it's not flashed in a car with a BCM, FPCM, ABSCM, WTFBBQCM present it won't allow a flash. After more research, it looks like EFI Live is superior to HPTuners in changing options, including disabling the BCM that forces the VSS to be picked up by the ECM via failover.

Now, normally I wouldn't give a flip at this point and would just go ahead and focus on getting the speedometer working by reading the VSS signal directly.

But after spending a considerable amount of time looking at E39 and E39a tuning, VSS plays a fairly significant role in torque delivery (and misc. other options). More than anything, I'm disappointed at the lengths GM has gone through to crippled their software.

Last edited by gooflophaze; 04-10-2016 at 02:35 PM.
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Old 04-13-2016, 04:31 PM   #150
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Quick question to those with running cars.... What did you do for cooling fan wiring? I tied into pin 59 on X1 with a diode, just to be safe, and on my first full temp run up my fan never kicked on. I had a coolant leak so I was more worried about that than I was to check to see if I had 12v going to my fan relay. Just curious as I get ready for my next full temp run.
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Old 04-13-2016, 05:14 PM   #151
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Are you running HPTuners? VCM Scanner has the option to turn things on and off for testing.

I also found that the LFX wants to run a little warm by stock. Our firstish start we saw temps hit 220 without the fans kicking on so we shut it down - turns out the fans kick on at 222f or 195f depending on "torque zone" and vss and rpm.
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Old 04-13-2016, 08:23 PM   #152
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I could attempt to program it in a camaro if you shipped it to me. I think we still have one siting out on the used lot if not I'd have to wait for one to come in for service.
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Old 04-13-2016, 10:00 PM   #153
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If we weren't this close to the mitty, I'd take you up on that. But at this point, I'm not sure if anything short of EFI Live with their option of disabling the BCM that HPTuners doesn't have will get the ECM to play with the VSS. Too many TLA's.

Oh - and this is kinda neat - with raspberry pi you can throw on a mcp2515 board (if you bring SPI down to 3.3v) and there's a kernel module that'll introduce berkley sockets so you can run tcpdump (candump) and a slew of other nifty utils. It's nice because you can capture frames at the full 500kpbs instead of relying on serial (that's only 115kbps). There's also python and c libraries - I just wish I was as proficient with my python as I am with my shell scripting. I've got a rpi zero that I've hooked up via serial console to my laptop, wired in a potentiometer to the coolant (and oil pressure) sensor, and was able to identify the gmlan packets and bytes by seeing what changed as I sweeped the pot. The nice thing about using the gmlan packets is I don't have to load up the bus with obdii requests. </geek>

I'm still playing with scaling the coolant gauge and seeing where the LFX wants sit naturally. In traffic we hit 222f, at speed it sat around 190-200f - this appears to be in line with what camaro5 forums are reporting. We'll need to fabricate an undertray before we get the A/C working and fighting the Georgia summer for sure. I'm still slightly confused as to when the fans are supposed to kick on - there's a hi fan and a low fan, torque zones and RPM and VSS.. and a stock 180f thermostat.



Right now I have the nb cluster gauge scaled from 160 to 240, so it sits pointing straight up at 200 and 2/3rds at 220. I can make that less prevalent by increasing the scale from say 100 to 300, or applying some math to it. I might miata sender resistance curves and try and ape those.. plenty of ways to skin that cat.

And again.. Sorry for the lack of chapters, been busy doing all this stuff and more. Got new rubber on 6ul's yesterday along with an alignment. Hood is back from paint and looks good. I'll try and snag a better picture in the sun, but it looks nice and subtle.

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Old 04-15-2016, 12:24 AM   #154
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Is that the hood you were working on? Looks good.

That's weird they change they temp so much. I guess it's for emissions.
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Old 04-23-2016, 12:33 AM   #155
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Looking for ideas to cleanly and securely mount the ECU. Any photos/ideas you guys can share?
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Old 04-23-2016, 01:28 AM   #156
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GM PN 22897960. Our dealer had it in stock as they tend to break. Was only about $10 if memory serves.



It's a plastic(composite) mount. We shaved the extra bits off the bottom to give a flat mounting part.


We trimmed one of the headlight bucket braces underneath the fender to give us an additional 1.5 inches so we could tuck the top part of the ECM underneath which made a HUGE difference. The biggest problem is trying to find a good position that the harness will allow.

Once we had the position, we used some fat rivets to attach a piece of flat metal we bent and drilled to meet a hole that was already threaded m6x1.0.



Found a pre-threaded hole behind the headlight bucket - it's at an odd angle, so we bent the flat at roughly 45 degrees, drilled the hole for the bolt, positioned the mount while twisting the flat into submission, drilled and riveted. Nothings exactly square in this area..



After that, we bent a piece of flat into an S, drilled a hole into the fender well, ran a bolt from there to the S bracket, and from there onto the mounting tab (we had to cut a gusset out of the composite - it'll make more sense when you have it in your hand unmolested).



It's not going anywhere. Pretty happy with how it came out.

Attached Thumbnails
The Portabull LFX Build-img_20160225_135840.jpg   The Portabull LFX Build-img_20160423_011008.jpg   The Portabull LFX Build-img_20160225_135846.jpg   The Portabull LFX Build-img_20160423_010956.jpg   The Portabull LFX Build-img_20160225_142619.jpg  


Last edited by gooflophaze; 04-23-2016 at 09:04 PM.
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Old 04-23-2016, 06:58 PM   #157
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Yea that looks really good. I'll dig up the part number and post it up later today.
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Old 04-23-2016, 09:04 PM   #158
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Found it - it was buried in a different subsection - 22897960
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Old 04-25-2016, 11:09 PM   #159
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Any chance you have a shot of the underside of your hood gooflophaze? I am about to start modifying the hood to clear and I'd like to have a good reference of exactly where I am going to have to make clearance.
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Old 04-26-2016, 02:13 PM   #160
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nice meeting you this weekend. do you have any drink tickets?
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